INCREASING THE TREHALOSE CONTENT OF ORGANISMS BY TRANSFORMING THEM WITH COMBINATIONS OF THE STRUCTURAL GENES FOR TREHALOSE SYNTHASE

Abstract: Two nucleotide sequences encoding two different polypeptides found in yeast trehalose synthase have been isolated and cloned. A third polypeptide has been isolated from the enzyme and characterized, and a method is provided to isolate and clone the nucleotide sequence encoding this polypeptide. The coding sequences can be inserted into suitable vectors and used to transform host cells. The transformed cells will produce increased amounts of trehalose compared to the untransformed wild types and have increased tolerance to a variety of stresses, in particular to decreased availability of water. The invention may be used to improve the stress tolerance of organisms, to increase the storage life of foodstuffs and to produce trehalose economically on an industrial scale in an organism (e.g. baker's yeast) that is a traditional and safe foodstuff.

Description: INCREASING THE TREHALOSE CONTENT OF ORGANISMS BY TRANSFORMING THEM WITH COMBINATIONS OF THE STRUCTURAL GENES FOR TREHALOSE SYNTHASE. 5 FIELD OF INVENTION ' This invention relates to the genetic engineering of the trehalose synthetic pathway of yeasts, such as baker's and distiller's yeasts, and to the transfer of this pathway by 10 genetic engineering to other organisms. In particular, the present invention concerns trehalose synthase, novel genes encoding the trehalose synthase, novel vectors containing the novel genes, and host cells and organisms transformed with the novel vectors. The invention also relates to the production of 15 trehalose and ethanol and to the improvement of the stress resistance of organisms, in particular yeasts and crop plants. BACKGROUND OF THE INVENTION: 20 It is well known that sugars and other polyhydric compounds stabilize isolated proteins and phospholipid membranes during dehydration, probably by replacing the water molecules that ar hydrogen-bonded to these macro olecules [reviewed by Crowe, J.H. et al. (1987) Biochemical Journal 242, 1-10]. Trehalose 25 (α-glucopyranosyl-α-D-glucopyranose) is a dimer of two glucose molecules linked through their reducing groups. Because it has no reducing groups, it does not take part in the Maillard reactions that cause many sugars to damage proteins, and it is one of the most effective known protectants of proteins and 30 biological membranes in vitro. f In nature, trehalose is found at high concentrations in yeasts and other fungi, some bacteria, insects, and some litoral animals, such as the brine shrimp. It is notable that all thes 35 organisms are frequently exposed to osmotic and dehydration stress. Accumulation of trehalose in higher plants is rare, bu high levels occur in the so-called resurrection plants, such a the pteridophyte, Selaσinella lepidophylla. which can survive extended drought [Quillet, M. and Soulet, M. (1964) Comptes Rendus de l'Academie des Sciences, Paris 259, pp. 635-637; reviewed by Avigad, G. (1982) in Encyclopedia of Plant Research (New Series) 13A, pp. 217-347]. A decreased availability of intracellular water to proteins and membranes is a common feature not only of dehydration and osmotic stress, but also of freezing, in which ice formation withdraws water from inside the cells, and heat stress, which weakens the hydrogen bonds between water and biological macromolecules. In recent years several publications have shown a close connection between the trehalose content of yeast cells, especially of the species Saccharomyces cerevisiae, and their resistance to dehydration and osmotic, freezing and heat stresses. This work has lead to the concept [summarized by Wiemkem, A. (1990) Antonie van Leeuwenhoek 58, 209-217] that,- whereas the main storage or reserve carbohydrate in yeast is glycogen, the prime physiological function of trehalose is as a protectant against these and other stresses, including starvation and even poisoning by copper, ethanol and hydrogen peroxide, which all stimulate trehalose accumulation [Attfield, P.V. (1987) Federation of European Biochemical Societies Letters 225, 259-263]. Thus, during growth of Saccharomyces cerevisiae on glucose, glycogen begins to accumulate about one generation before the glucose is exhausted, and begins to be steadily consumed as soon as all external carbon supplies are exhausted. In contrast, accumulation of trehalose (partly at the expense of glycogen) only begins after all the glucose has been consumed,' and the trehalose level is then maintained until nearly all the glycogen has been consumed [Lillie, S.A. & Pringle, J.R. (1980) Journal of Bacteriology 143, 1384-1394]. The eventual consumption of trehalose is accompanied by a rapid decrease in the number of viable cells. When trehalose levels in S. cerevisiae have been manipulated by varying the growth conditions or administering heat shocks, high positive correlations have been found between the trehalose content of the cells and their resistance to * dehydration [Gadd, G. et al. (1987) Federation of European r- 5 Microbiological Societies Microbiological Letters 48, 249-254] '- J* - heat stress [Hottiger, T. et al., (1987) Federation of Europea Biochemical Societies Letters 220, 113-115] and freezing [Gelinas, P. et al. Applied and Environmental Microbiology 55, 2453-2459]. Also, strains of S. cerevisiae and other yeasts 10 selected for resistance to osmotic stress [D'Amore, T. et al. (1991) Journal of Industrial Microbiology 7, 191-196] or high performance in frozen dough fermentation [Oda, Y. (1986) Applied and Environmental Microbiology 52, 941-943] were found to have unusually high trehalose contents. Furthermore, a 15 mutation in the cyclic AMP signaling system of S. cerevisiae that causes constitutive high trehalose levels also causes constitutive thermotolerance, whereas another mutation in this system that prevents the usual rise in trehalose during heat shock also prevents the acquisition of thermotolerance 20 [Hottiger, T. et al.. (1989) Federation of European Biochemica Societies Letters 255, 431-434]. Thus, there is much evidence pointing to a connection between trehalose content and stress resistance in yeasts, especially S. cerevisiae. similar findings have been made for several other fungi [e.g.. Neves, 25 M.J., Jorge, J.A. , Francois, J.M. & Terenzi, H.F. (1991) Federation of European Biochemical Societies Letters 283, 19-22]. However, a causative relationship has not yet been demonstrated. Further, nearly all conditions that cause increases in the trehalose content of yeast also cause -. 30 increases in the levels of the so-called heat shock proteins. The 1989 publication of Hottiger and colleagues, / " cited above, claims that canavanine does not cause an increase in either trehalose levels or thermotolerance, whereas this compound is reported to induce heat shock proteins. 35 Whether or not there is a causal relation between trehalose content and stress resistance, it has become general practice in the manufacture of baker's yeast to maximise the trehalose content of the yeast. Various maturation processes have been developed to achieve this aim, and they are of crucial importance in the manufacture of active dried yeast. The details of these processes are often secret, but they are generally empirical regimes in which carbon and nitrogen feeds, aeration and temperature are carefully controlled and selected strains of yeast are used. They demand time and energy inputs during which little increase in cell number occurs. A more rational and controlled process would be of economic benefit. According to Cabib, E. & Leloir, L.F. [(1957) Journal of Biological Chemistry 231, 259-275], trehalose is synthesized in yeast from uridine diphosphoglucose (UDPG) and glucose- -6-phosphate (G6P) by the sequential action of two enzyme activities, trehalose-6-phosphate synthase and trehalose- -6-phosphate phosphatase. Londesborough, J.& Vuorio, 0. [(1991) Journal of Microbiology 137, 323-330, expressly incorporated herein by reference] have purified from baker's yeast a proteolytically modified protein complex that exhibited both these activities and appeared to contain a short polypeptide chain (57 kDa) and two truncated versions (86 kDa and 93 kDa) of a long polypeptide chain. The intact long chain was estimated to have a mass of at least 115 kDa. It was not disclosed which enzyme activity or activities was associated with which polypeptide, nor indeed whether both polypeptide were essential for either or both enzymatic activities. Anti-sera against both polypeptides were reported, but no amino acid sequences were disclosed. An earlier patent application [EP 451 896; see Claim 1] has claimed for a transformed yeast "comprising.... one gene encoding....trehalose-6-phosphate synthase". However, no information about the either the gene' or the protein it encodes was provided. Several authors have reported increases in TPS activity in conditions that lead to accumulation of trehalose by s. cerevisiae. and Schizosaccharomvces pombe both during the approach to stationary phase [Winkler, K. , et al. (1991) _t Federation of European Biochemical Societies Letters 291, 269 ^,J) 5 272; Francois, J. , et al. (1991) Yeast 7, 575-587] and after φ temperature shift-ups to about 40 °C [De Virgilio, C, et al. (1990) Federation of European Biochemical, Societies Letters 273, 107-110]. Panek and her colleagues [Panek, A.C., et al. (1987) Current Genetics 11, 459-465] have claimed that TPS 10 activity is increased by dephosphorylation of pre-existing enzyme molecules, i.e., that it is the result of post-translational regulation. This claim has been challenged [Vandercammen, A., et al. , (1989) European Journal of Biochemistry 182, 613-620] but continues to be made [Panek, 15 A.D. & Panek, A.C. (1990) Journal of Biotechnology 14, 229-238]. Evidence for or against an increase in the amount of enzyme during trehalose accumulation is conflicting. Inhibitor of mRNA synthesis inhibited trehalose accumulation by S. cerevisiae shifted from 30 to 45 °C [Attfield (1987) loc.cit.] 20 whereas under very similar conditions Winkler et al [(1991) loc.cit.] found that cycloheximide (an inhibitor of protein synthesis) did not prevent the accumulation of trehalose, which, however, occurred without an observable increase in TPS activity. In a lower temperature range (a shift from 23 to 36 25 °C) , trehalose accumulation was accompanied by a three-fold increase in TPS activity, and cycloheximide prevented the increase in TPS [Panek, A.C, et al. (1990) Biochemie 72, 77-79]. In Schizosaccharomvces po be. [De Virgilio, C. , et al. (1991) loc. cit.] temperature shiftup caused a large 30 accumulation of trehalose and increase of TPS which were not prevented by cycloheximide, leading the authors to suggest tha <$. in this yeast a post-translational activation occurs. We now disclose that in S. cerevisiae the co-ordinate increases in TP and TPP activities during exhaustion of glucose are accompanie 35 by an increase in antigenic material recognized by anti-sera t the short and long chains of a purified trehalose synthase. Hence, a method to increase the trehalose content of cells, an so, their stress tolerance, would be to isolate, clone, and modify the structural genes (hereinafter referred to as TSS1, TSL1, and TSL2) of these polypeptides and cause their expression in yeast or other host cells under the control of suitable promoters. If the expression of these genes could be controlled, then so could the trehalose content of the host cells. The well known metabolic theory of Kacser & Burns [(1973) Symposium of the Society of Experimental Biology 27, 65-107] teaches that in principle the concentration of any intermediate, such as trehalose, can be increased by increasing the amount of any enzyme synthesizing it or decreasing the amount of any enzyme degrading it, but that the size of the increase may not be significant. The novelty of the present invention* lies in the identification and characterization of the particular yeast genes that must be modified to increase the amounts of trehalose synthase and the recognition of the advantages of modifying the synthetic pathway rather than the degradative pathway. These advantages include (i) leaving the highly regulated [see, e.g., Thevelein, J.M. (1988) Experimental Mycology 12, 1-12] degradative pathway intact to avoid the physiological problems likely in yeast that cannot activate this pathway, (ii) the possibility of causing yeast to synthesize trehalose under physiological conditions where wild type yeasts do not (so that blocking the degradative pathway cannot increase the amount of trehalose) and (iii) the important possibility of introducing by these genes a trehalose-synthetic capacity to organisms, such as most higher plants, that naturally lack this capacity. Expression of the genes for trehalose synthesis in yeast under conditions where trehalase is active will increase the operation of a so-called "futile" cycle, in which glucose is continuously phosphorylated, converted to trehalose and regenerated by hydrolysis of the trehalose, resulting in increased consumption of ATP. This ATP must be regenerated, and under fermentative conditions this will occur by conversion of sugars into ethanol. Therefore, introduction of TSSl, TSLl and TSL2 into yeast under the control of promoters active under -* fermentative conditions is expected to decrease the yield of ■ 5 cell mass on carbon source and increase that of ethanol. The ' many attempts [e.g., Schaaf et al. (1989) Yeast 5, 285-290] to increase fermentation rates in yeast by increasing the levels of glycolytic enzymes have been unsuccessful. The probable reason is that availability of ADP limits the rate of 10 glycolysis in yeast. Introduction of a futile cycle-ATPase is thus expected to increase this rate. The feasibility of this invention is demonstrated by the finding [Gancedo, J.-M. & Navas, M.A. (1992) Yeast 8 S574] that expression of the gluconeogenic enzymes, fructose bisphosphatase and phosphoenol 15 pyruvate carboxykinase under fermentative conditions (so causing two futile cycles) caused a 50 % increase in the fermentation rate of resting yeast. Use of the trehalose futil cycle has the added advantage that the cells must then contain a steady state level of trehalose, which increases their 20 tolerance to osmotic and temperature stress. The present invention includes transformed strains of distiller's yeast, in which the presence of modified forms. of any or all of TSSl, TSLl and TSL2 results in an increased yiel 25 of ethanol from carbohydrate sources. As well as being used to improve the properties of yeast, especially active dried yeast and yeast for frozen doughs, thi invention has other obvious applications. First, by increasing 30 the proportion of trehalose in yeast, the industrial scale production of trehalose from yeast is made more economic. It i particularly advantageous to obtain trehalose from yeast < because, since yeast is a traditional and safe food stuff, a minimal purification of the trehalose will often be adequate: 35 preparations of trehalose containing yeast residues could be safely added to food stuffs for human or animal consumption. Trehalose also has medical applications, both as a stabilizer of diagnostic kits, viruses and other protein material [WO 87/00196] and, potentially, as a source of anti-tumour agents [Ohtsuro et al. (1991) Immunology 74, 497-503]. Trehalose for internal applications in humans would be much more safely obtained from yeast than from a genetically engineered bacterium. Second, by transferring these genes to higher plants after making suitable modifications obvious to anyone skilled in the art (in general, replacements of adenine/thymine base pairs by guanine/cytosine base pairs as suggested by Perlak et al. [(1991) Proceedings of the National Academy of Sciences of the U.S.A. 88, 3324-3328] and the introduction of suitable promoters, some of which may be " tissue-specific, to direct the synthesis of trehalose to frost and drought-sensitive tissues) , the resistance of the plants to various stresses, especially frost and dehydration, should be improved. The economic importance of such improvements is potentially enormous, because even small increases in cold-tolerance will lead to large increases in growing season, whereas dehydration resistance can save entire crops in time of drought. Frost and drought resistance in higher plants is usually accompanied by increases in compounds such as proline rather than trehalose [reviewed by Stewart (1989) in "Plants under Stress", pp 115-130], but, as mentioned above, resurrection plants accumulate large amounts of trehalose and there seems, a priori, to be no reason why this strategy should not be successful. Therefore, the present invention includes a process to transform crop plants by introducing recombinant forms of the structural genes of yeast trehalose synthase (TSSl, TSLl and TSL2) so as to increase the trehalose content of some of their tissues compared to those of the parent plant. Such transformed plants can also be economic and safe sources of trehalose. Third, the shelf-life of food products can be increased by adding trehalose to them [WO 89/00012] . A further aspect of the present invention is a novel process for producing trehalose-enriched food products from plants by causing them to express the structural genes for yeast trehalose synthase in their edible tissues. * SUMMARY OF INVENTION: & The present invention provides two isolated genes encoding, respectively a short and a long chain of yeast trehalose synthase and a third gene encoding a 99 kDa polypeptide that occurs in some trehalose synthase preparations and has 10 trehalose-6-phosphatase activity. These genes can be used to transform an organism (such as a yeast, other fungus or higher eukaryote) , whereby the transformed organism produces more trehalose synthase resulting in a trehalose content higher tha that of the parent organism. The higher trehalose content 15 confers improved stress resistance and storage properties on the transformed organism as compared to the parent organism, and the transformed organism can be used to provide large quantities of trehalose. Thus, a process for producing a crop plant which has increased resistance to water deprivation, hea 20 ' and cold, comprises transforming the plant by introducing at least one of the novel genes into the plant's tissue. The invention also provides a trehalose synthase which exhibit trehalose-6-phosphate synthase activity activatable by 25 fructose-6-phosphate and also trehalose-6-phosphatase activity Finally, the invention provides processes for producing trehalose by cultivating a host or an organism which has been transformed with at least one of the novel genes, and processe 30 for producing trehalose enriched food products from plants by introducing at least one of the novel genes and allowing said genes to express the trehalose synthase in the edible tissues of the plant. BRIEF DESCRIPTION OF FIGURES Fig. 1. SDS-PAGE of intact trehalose synthase A 6-13 %T gradient gel was used. Lane 1 contains 8.3 μg of intact trehalose synthase eluted from the UDPG-Glucuronate- Agarose column with 0.2 M NaCl (#11 of Table l) . Lanes 2, 3 and 4 contain, respectively, 7.7, 12 and 1.0 μg of enzyme eluted from the column with 0.4 M NaCl containing 10 mM UDPG (#13, #14 and #15 from Table 1) . Lane 5 contains about 1 μq each of molecular mass markers (myosin, β-galactosidase, α-phosphorylase, BSA, ovalbumin, lactate dehydrogenase, triosephosphate-iso erase, myoglobin and cytochrome c) . The major polypeptides of intact trehalose synthase are named on the left and the molecular mass calibration, in kDa, is shown on the right. Fig. 2. SDS-PAGE of immunoprecipitates of wild-tvpe yeast grown on YP/2 % glucose A 9 %T gel was used. Lane 1 contains about 1 μg each of the molecular mass markers used in Fig 1. Lanes 2, 3 and 4 contain immunoprecipitates from 3.8 mg fresh yeast harvested after 16.1 h (1.2 % residual glucose), 18.1 h (no residual glucose) and 39 h. The molecular mass calibration is shown on the left and the major polypeptides of trehalose synthase and the heavy chain of γ-globulin are shown on the right. Fig. 3. The promoter and terminator of TSSl and the amino acid sequence deduced from its ORF. (a) In the promoter and terminator regions, the start ATG and tandem TGA stop codons are double underlined and a TATA box and putative catabolite repression element are underlined, (b) In the amino acid sequence (SEQ ID NO:2), the sequences found in peptides isolated from the short chain of trehalose synthase are underlined. Fig. 4. The promoter and terminator regions of TSLl and the amino acid sequence deduced from its ORF. (a) In the promoter region, the start ATG codon is double underlined and two TATA boxes and six putative heat shock elements are underlined. A putative MIG1 binding site is overlined. In the terminator region, the TAA stop codon is double underlined and a putative transcription termination element is underlined. Lower case letters show the end of the terminator region of the ARGRII gene, which has opposite polarity, (b) In the amino acid sequence (SEQ ID NO:82), sequences found in peptides isolated from (fragments of) the 123 kDa long chain are underlined, and those from peptides liberated from intact trehalose synthase by limited digestion with trypsin are underlined and bold. Fig. 5. Alignment of the amino acid sequences of the short and long chains of trehalose synthase The complete short chain sequence (SEQ ID NO:2; the upper sequence) is aligned against residues 320 to 814 of the 123 kD long chain (SEQ ID NO:4; the lower sequence) . 32 gaps are introduced to optimize the alignment. Vertical dashes indicate identical residues. Colons indicate conservative substitutions Fig. 6. Important restriction sites in TSSl and TSLl The heavy lines indicate open reading frames. The scale bar shows one kb. Fig. 7. Synthesis of r 1 C]-trehalose from rϋ- 1 C1-glucose 6-phosphate bv an extract of wild-type yeast Reaction mixtures (100 μl) contained 40 mM HEPES/KOH pH 6.8, 1 mg BSA/ml, 10 mM MgCl- 10 mM [U- 1 C]-G6P (736 c.p.m./nmol) and (a) no phosphate or (b) 5 mM K phosphate pH 6,8 and (0) 5 mM UDPG, (f) 2.5 mM ADPG or (D) neither UDPG nor ADPG. Reactions were started by adding 10 μl (equivalent to 94 μg fresh yeast) of a 28,000 g supernatant of stationary phase X2180. Reactions were stopped by transfer to boiling water for 2 min and addition of 1.0 ml of a slurry of AG1-X8 (formate) anion exchange resin [Londesborough & Vuorio (1991) loc. cit.]. The radioactivity in the resin supernatant was measured. Fig. 8. Western analysis of Klg 102 and X2180 yeasts Growth of the yeasts is described in Example 7. The loads of fresh yeast per lane were: lane 1, 200 μg X2180/2; lanes 2 and 5, 330 μg 2669/1: lanes 3 and 6, 610 μg 2669/2; lanes 4 and 7, 810 μg 2670/1+2; lane 8, 560 μg X2180/1 and lane 9, 280 μg X2180/1. The blot was probed with anti-TPS/P serum at a dilution of 1/30,000. Major bands of trehalose synthase are identified on the right. Fig. 9. Treatment of truncated trehalose synthase with 1.9 mM NEM Truncated enzyme (0.13 TPS units/ml « 43 μg/ml) in 2 mg BSA/ml 50 mM HEPES pH 7.0 containing 67 mM NaCl, 0.2 mM EDTA, 0.17 mM dithiothreitol, 0.17 mM benzamidine and 1.7 mM UDPG was incubated at 24 °C with (closed symbols) or without (open symbols) 1.9 mM NEM. TPS (i,0] and TPP (i,D) activities were measured. . Fig. 10. Autoradiogram of truncated trehalose synthase labelled with r 14 C1-NEM and separated bv SDS-PAGE Labelling was performed as described in Example 8 for 1.5, 10.5, 63 and 190 min in lanes 1, 2, 3 and 4, respectively. The positions of the (57 kDa) short chain, 93 and 86 kDa long chain fragments and the carrier BSA are indicated. Fig. 11. Treatment of truncated trehalose synthase with ethyl labelled NEM. Truncated enzyme (7.2 TPS units/ml « 0.24 mg/ml) in 1 mg BSA/ 25 mM HEPES pH 7.0 containing 2 mM MgC12, 1 mM EDTA and 0.2 M NaCl was incubated at 23 °C with (solid symbols) or without (open symbols) 32 μM ethyl-labelled NEM. TPS (i,o] and TPP (1,D) activities and the amounts of [ 14 C]-NEM incorporated int the 93 (A) , 86 (+) and 57 (X) kDa polypeptides were measured. 0.1 mol NEM incorporated per mol (150 Kg) of enzyme correspon to an excess radioactivity of 75 c.p.m. in bands cut from the gel. Fig. 12. Stoichiometry of NEM labelling Residual TPP activity is plotted against the amount of NEM incorporated to the 93 and 86 kDa fragments of the long chain. Ring-labelled (•) and ethyl-labelled (0) NEM were used. Fig. 13. SDS-PAGE analysis of fractions eluted from the cellulose-phosphate with buffer containing 0.3 % Triton Lane L contains 47 μl of the intact trehalose synthase applied to the column. Lane M contains about 1 μg each of the molecula mass markers used in Fig 1. The numbered lanes contain 33 μl o selected 1.5 ml fractions eluted from the column. The NaCl gradient began to appear in fraction 6 and reached 300 mM at fraction 27. A step to 600 mM NaCl emerged between fractions 3 and 37. Fractions 40 to 42 were eluted with 200 mM K phosphate The major bands in the trehalose synthase preparation are identified on the left. Details are given in Example 9. Fig. 14. In vitro activation of trehalose synthase by limited tryptic digestion Intact trehalose synthase was incubated with (solid symbols) and without (open symbols) trypsin and its TPS activity measured in the presence of 5 mM F6P in reaction mixtures containing (0, ) no phosphate or (!) 5 mM K phosphate pH 6,8. Details are given in Example 10. Fig. 15. Limited trvptic digestion of intact trehalose synthase Lane 1 contains the untreated trehalose synthase used in Fig. 15 and lane 2 the same amount of enzyme after 48 min treatment with trypsin. Lane 3 contains molecular mass standards. The major polypeptides of trehalose synthase are identified on the left. Fig. 16. The effect of fructose 6-phosphate on the TPS activity of intact trehalose synthase. at different phosphate concentrations The TPS activity of native trehalose synthase was measured between zero and 10-mM F6P. Other conditions were as in the standard TPS assay with (•) no changes, (O) 1.3 mM K phosphate pH 6.8 added or (■) 4 mM K phosphate pH 6.8 and 0.1 M KCl added and the MgCl 2 concentration decreased to 2.5 mM. Activities are shown as percentages of that in the standard assay (i.e., at 5 mM F6P and no phosphate) . Fig. 17. Activation of the TPP activities of intact and truncated trehalose synthase by phosphate TPP activities were measured at 0.5 mM [ 14 C]-trehalose-6- phosphate in assay mixtures containing 50 mM Hepes pH 6.8, 1 mg bovine albumin/ml and the indicated concentrations of K phosphate pH 6.8 and are shown as percentages of the standard TPS activity. Initial rates are shown for the (I) intact and (•) truncated enzyme. Rates during the second five minutes of the accelerating reaction obtained with truncated enzyme are also shown (O) . Fig. 18. Phosphate-dependence of the TPP activity of intact trehalose synthase The reciprocal of the increase in rate (V_) caused by the phosphate is plotted against (0) [phosphate] "2 or (t) [phosphate] "1 . V Δ is shown as a percentage of the standard TPS activity. Fig. 19. Western analyses of E. coli transformed with TSSl and TSLl The gels were loaded with samples of whole homogenates (HOM) equivalent to 300 ± 12 μg fresh cells or 28 000 g supernatants (SUP) equivalent to 340 ± 25 μg fresh cells. The letters above the lanes indicate the cell types: K, control (HB101) cells; L ALK03568 (HB101 transformed with TSLl); S, ALK03566 " (HB101 transformed with TSSl) . Gel 1 was probed with anti-57K serum (1/20 000) and gel 2 with anti-93K serum (1/20 000) . The positions of the 57 kDa short chain and about 60, 36 and 35 kD fragments of the 123 kDa long chain are shown. Molecular mass standards are labelled in kDas. Fig. 20. Plasmids containing TSSl and TSLl pBluescript containing (a) TSSl with its own promoter, (b) TSS without its promoter and (c) TSLl with its own promoter are shown. Fig. 21. Southern analysis of two tssl disruptants of S.cerevisiae. Clal digests of DNA from control yeast (S150-2B; lanes 2,5 and 9), and two tssl disruptants, ALKO 3569 (lanes 3, 6 and 10) an ALKO 3570 (lanes 4,7 and 11) were probed with TSSl (lanes 2 to 4) , LEU2 (lanes 5 to 7) and TSLl (lanes 9 to 11) . Lanes 1 and contain DNA standards DETAILED DESCRIPTION OF THE INVENTION: In the following description, trehalose-6-phosphate synthase (TPS) and trehalose-6-phosphate phosphatase (TPP) refer to catalytic activities, not to proteins, unless specifically stated otherwise, whereas trehalose synthase refers to a protein that can convert uridine diphosphoglucose (UDPG) and glucose-6-phosphate (G6P) into trehalose, and also exhibits as partial reactions TPS and TPP activities. TSSl, TSLl, and TSL2 are structural genes that encode, repectively, the short (57 kDa) and the about 130 and 99 kDa long chains of trehalose synthase. It is well known that mutations occur in genes and can cause changes in the amino acid sequence of the encoded polypeptide. Changes can also be introduced by genetic engineering techniques. As used herein, the term TSSl (or TSLl or TSL2) gene includes all DNA sequences homologous with the sequences herein disclosed for TSSl (or TSLl or TSL2) and encoding polypeptides with the functional or structural properties of the 57 kDa (or about 130 kDa or 99 kDa, respectively) polypeptide. Sequences articially derived from these genes but still encoding polypeptides with the desired functional or structural properties are also included. The present inventors previously reported the isolation of a partially degraded protein preparation that contained a short (57 kDa) polypeptide chain and two fragments (86 and 93 kDa) of a long polypeptide chain and possessed both TPS and TPP catalytic activities [Londesborough, J & Vuorio, O. (1991) Journal of General Microbiology 137, 323-330]. The size of the full-length intact long chain, from which both the 86 and 93 kDa fragments were then believed to be derived, and whether one or other polypeptide possessed one or other of the catalytic activities were not known at that time. The inventors have now isolated an undegraded trehalose synthase that contains the 57 kDa short chain, and two long chains of about 130 kDa and 99 kDa as its major polypeptides. Traces of other polypeptides are also present that appear to degradation products of the about 130 and 99 kDa chains. Two $ genes, TSSl and TSLl, that encode, respectively, the short an 5 about 130 kDa long chains have been cloned and sequenced. $ Because the size of this long chain is now known from its gen to be 123 kDa, it is hereafter called the 123 kDa long chain. TSSl encodes a polypeptide with a theoretical molecular weigh of 56.2 kDa; however, this short chain and the 99 kDa long 10 chain are still called after their apparent molecular weights by SDS-PAGE analysis, the error in such analyses being at lea ± 10 kDa at 130 kDa. The sequences of TSSl and the polypeptide it encodes are 15 disclosed as SEQ ID NOS:l and 2, respectively. The sequences TSLl and the polypeptide it encodes are disclosed as SEQ ID NOS:83 and 82, respectively (earlier versions of these sequences, lacking the 5'- and N-terminal regions, are listed as SEQ ID NOS:3 and 4) . Genetic evidence is disclosed that 20 shows that a functional TSSl gene is involved in the expressi of both TPS and TPP catalytic activities in S. cerevisiae: (1) both activities are absent from a mutant strain (Klg 102) tha lacks a properly functional TSSl gene and does not express th short chain in a form recognizable in Western blots although 25 does express immunologically recognisable long chain; (2) disruption of TSSl eliminates TPS and TPP activities, abolish the short chain signal from Western blots and prevents the accumulation of trehalose, and these defects are simultaneous reversed by transformation with TSSl, which also increased th 30 resistance of the cells to freezing stress; and (3) transformation of Escherichia coli with TSSl causes a large increase in the TPS activity of the transformants (but no ® detected increase in their TPP activity) . 35 We disclose biochemical evidence that the TPP catalytic activity of a truncated trehalose synthase requires a functional long chain: incorporation of about 1 mole of 14 C-N-ethylmaleimide into the 93 kDa long chain fragment per mole of truncated trehalose synthase results in complete loss of TPP activity but only a slight loss of TPS activity. Furthermore, we have been able to isolate the 99 kDa polypeptide and show that it possesses residual TPP activity but no TPS activity. Also, intact trehalose synthase is partially resolved into a 99 kDa-enriched form with a relatively high TPP/TPS ratio and a 123 kDa-enriched form with a lower TPP/TPS ratio. However, truncation of the 123 kDa long chain has dramatic and important effects on the TPS activity of trehalose synthase: removal of the N-terminal 330 or so amino acids decreases the sensitivity of the TPS catalytic activity to inhibition by phosphate and almost eliminates its activation by fructose-6-phosphate. Further, transformation of E. coli with TSLl causes an increase in the TPS activity of the transformants (but no detected increase in their TPP activity) . Thus, both the short and the long chains make essential contributions to both the TPS and the TPP catalytic activities of trehalose synthase. The situation is therefore that there are at least two different structural genes for a trehalose synthase, neither of which can be completely described as the structural gene of either a trehalose-6-phosphate synthase protein or a trehalose-6-phosphate phosphatase protein. We disclose that the amino acid sequences of peptides isolated from both the 86 and 93 kDa long chain fragments found in the truncated enzyme described by Londesborough & Vuorio [(1991) loc. cit] are encoded by TSLl. Surprisingly, however, none of the peptides isolated from the 99 kDa polypeptide in the intact enzyme is encoded by TSLl. Therefore, the structural genes encoding polypeptides of yeast trehalose synthase include a third member, TSL2. The 99 kDa polypeptide encoded by TSL2 was not visible in SDS-PAGE analyses of truncated enzyme. However, one of the 6 peptides isolated from the 93 kDa fragment was not encoded by TSLl and had an amino acid sequence also found in a peptide isolated from the 99 kDa polypeptide. Thus, traces of a degradation product of the 99 kDa polypeptide are present in truncated enzyme, and migrate with the 93 kDa fragment during SDS-PAGE. The inventors have not yet sequenced this third structural gene, TSL2, but disclose information that provides obvious methods for its isolation and cloning by a person ordinarily skilled in the art. Also a clone (pALK7756) comprising at leas part of this gene has been deposited (Accession number, DSM 7425; Deutsche Sammlung von Mikroorganismen und Zellkulturen, Mascheroder Weg 1 B, D-3300 Brauschweig) We disclose that the genes TSSl and TSLl contain extensive similarities such that the amino acid sequence of the entire short chain is 37 % identical to residues 495 to 814 of the long chain. A novel feature of the present invention, therefore, is that i order to increase the capacity of a yeast or some other host • organism for trehalose synthesis it can be necessary to increase the expression of both the TSSl and the TSLl and TSL2 genes or modify these genes in some other way, not because either TPS or TPP activity is "rate-limiting", but because mor than one gene affects each activity. Thus, the results summarised above disclose that both TSSl and TSLl affect TPS activity and both TSSl and TSL2 affect TPP activity. However, these results also disclose that the TSL2 gene product (the 99 kDa polypeptide) isolated by chromatography is itself a trehalose-6-phosphatase whereas the TSSl gene product expresse in E. coli is a trehalose-6-phosphate synthase, although the catalytic efficiency of these separate polypeptides can be les than when they are correctly assembled in a trehalose synthase complex. A surprising finding was that the TSSl gene is identical with gene variously called FDP1 or CIF1. This gene has pleiotropic effects on the utilization of sugars by S. cerevisiae. In particular, haploid yeast bearing certain alleles of this gene (the so-called fdpl and cifl mutants) are unable to grow on mannose, or on mannose or sucrose, or on mannose, sucrose or fructose, or on mannose, sucrose, fructose or glucose, depending upon the severity of the defect [Van de Poll & Schamhart, (1977) Molecular and general Genetics 154, 61-66; Baήuelos, M. & Fraenkel, D.G. (1982) Molecular and Cellular Biology 2, 921-929]. Such mutants grow normally on galactose. Therefore, during the selection of strains in which the TSSl gene has been deleted or modified it is sometimes essential and always advisable to grow the transformants on galactose, because in many cases the desired transformant will be unable to grow on any other common sugar, including the routinely used glucose. This is an unexpected methodological consideration that would not be obvious even to a person skilled in the art: special knowledge about the sequence and chromosomal. location of the TSSl gene is required, which we now disclose. Since our disclosure of the identity of TSSl with FDP1 and CIF1 in USPA 841,997, a confirmation has been published by Bell, W. , et al. [(1992) European Journal of Biochemistry 209, 951-959)] The inventors' previous work [Londesborough & Vuorio (1991) loc. cit.] showed that the TPS catalytic activity of what is now known to be trehalose synthase requires a so-called TPS-Activator protein, which is a dimer of 58 kDa subunits. We have identified this protein by the amino acid sequences of peptides it contains and by its catalytic activity and disclose that it is yeast phosphoglucoisomerase. We disclose that fructose-6-phosphate (F6P) , which could be made by phospho¬ glucoisomerase from the glucose-6-phosphate (G6P) in the assay mixtures used to measure TPS activity, is a powerful activator of the TPS activity of intact trehalose synthase. Also, when the assay mixture contains an equilibrium mixture of G6P and F6P the TPS-Activator has no further effect, so that its phosphoglucoisomerase activity is a complete explanation of the activation it causes. Furthermore, the TPS activity of truncated trehalose synthase does not require F6P, and is not so strongly inhibited by phosphate as is that of the native enzyme. Thus, a trehalose synthetic pathway can in principle b transferred to any organism by transforming the organism with the structural genes for yeast trehalose synthase: it is not necessary to simultaneously introduce the TPS-activator, because F6P is a ubiquitous component of cells. Furthermore, i the amounts of F6P in an organism are inadequate, or phosphate concentrations are too high, the organism can be transformed with a truncated version of TSLl encoding the truncated long chain that confers insensitivity to phosphate and F6P. This aspect of the present invention is particularly significant, because it both allows the introduction of a trehalose synthetic pathway to organisms in which the cytosolic phosphat and F6P concentrations would prevent the efficient function of yeast trehalose synthase, and also may permit trehalose synthase to function efficiently at stages of yeast growth -whe native trehalose synthase would be inhibited by cytosolic phosphate. We disclose that intact trehalose synthase can be liberated from phosphate inhibition by treatment with trypsin in vitro. From the knowledge gained from the present invention, it is possible to produce trehalose reco binantly by transforming a host cell with the appropriately modified TSSl, TSLl and TSL2 genes. Methods of transformation and appropriate expression vectors are well-known in the art. Expression vectors are known in the art for both eukaryotic an prokaryotic systems, and the present invention contemplates us of both systems. For transformation of yeast at least two classes of promoters are contemplated. Yeast that accumulates more trehalose but at the usual time (i.e., after consumption of fermentable carbon sources) can be made by inserting extra copies of the genes under their own promoters, or stronger promoters with similar control. Such yeast can have improved storage properties and stress resistance and be more economic sources of trehalose. Yeast that synthesizes trehalose during fermentation can be made by replacing the genes' own promoters with promoters (such as ADH1) that are active during fermentation. As explained above, such yeast can have increased fermentation rates, ethanol yields and resistance to osmotic and temperature stress during fermentation. Also contemplated are modifications of the DNA sequence which would provide "preferred" codons for particular expression systems (e.g., bacteria and higher plants). In addition, the TSSl, TSLl and TSL2 DNA sequences may be modified by certain deletions or insertions, provided the translated polypeptides are enzymatically functional. Expression of functional polypeptides from TSSl, TSLl and TSL2 may be confirmed by assaying for TPS and/or TPP activity in the expression system by the methods described in Londesborough and Vuorio [ " (1991) loc. cit.] . Deletion of the first 330 amino acids or so from the 123 kDa long chain to give an enzyme active at higher phosphate and lower F6P concentrations has already been mentioned. The genes of the present invention may be transferred and expressed in plants by using the Ti plasmid system which is well known in the art. The internal transforming genes of a cloned T-DNA can be removed by recombinant DNA techniques and replaced by the genes of the present invention and expressed in plant tissues. Commonly, the coding sequence of the foreign gene (for instance, TSLl) is substituted for the coding region of the opine synthetase gene. In this way, the natural promoter and polyadenylation signals of the opine synthetase gene confer high-level expression of the foreign protein. Any method known in the art, however, may be used to transform higher plants with the genes of the present invention. The following examples are for illustration of the present invention and should not be construed as limiting the present invention in any manner. EXAMPLES General Methods and Materials. Materials. Fructose 6-phosphate (F6P) and adenosine 5'- diphosphoglucose (ADPG) were from Sigma Chemicals. Glucose 6-phosphate (G6P) , phenylmethylsulphonyl fluoride (PMSF) , uridine 5'-diphosphoglucose (UDPG) and other commercial reagents were from the sources stated in Londesborough & Vuori [(1991) loc. cit.]. Truncated trehalose synthase (proteolytic- ally activated "TPS/P") and TPS activator were prepared as described in Londesborough & Vuorio [(1991) loc. cit.]. The antisera, anti-TPS/P, anti-57K and anti-93K were made in rabbits using as antigen, respectively, truncated trehalose synthase, the short (57 kDa) chain and the 93 kDa fragment of the long chain of trehalose synthase as described in Londesborough & Vuorio [ (1991) loc. cit. ] . Buffers for enzyme extraction and purification. Two standard cocktails, HBMED (25 mM Hepes/KOH pH 7.0/1 mM benzamidine/1 mM MgCl-/0.1 mM EDTA/1 mM dithiothreitol) and HB2M1ED (HBMED but with final concentrations of 2 mM MgCl. and 1 mM EDTA) were used as basal buffers during preparation of cell extracts and purification of enzyme. Where indicated, the Hepes and benzamidine concentrations were increased to 50 mM and 5 mM, respectively. Yeasts. Commercial baker's yeast was from Alko's Rajamaki factory. The standard laboratory strains of S. cerevisiae used were X2180 (ATCC 26109) and S288C (ATCC 26108). Mutant strains are described in the Examples and Table 1 lists important strains of microorganisms and plasmids. Laboratory yeast were routinely grown on 1 % yeast extract/2% peptone (YP) containing the indicated carbon source in aerobic shake flasks at 30 °C and 200 r.p.m. Cells were harvested by centrifugation for 5 minutes at 3000 g, resuspended in distilled water and again centrifuged 5 minutes at 3000 g. The pellets were suspended in about 20 volumes of HB2M1ED and centrifuged in tared tubes for 10 minutes at 15,000 g. Tubes and pellets were weighed to give the mass of fresh yeast. For trehalose determinations, portions of the pellets were treated as described by Lillie, S.H. & Pringle, J.R. [(1980) Journal of Bacteriology 143, 1384-1394]. The washed cells were broken by suspending them at 0 °C in 1 to 4 volumes of HB2M1ED, adding fresh stock PMSF/pepstatin (1 mg pepstatin A/ml 0.1 M PMSF in ethanol) to give final concentrations of 10 μg pepstatin/ml and 1 mM PMSF, and shaking with glass beads for three 1 minute periods in a Braun MK II homogenizer or (for amounts less than 0.3 g fresh yeast) " by vortexing in an Eppendorf tube. The glass beads were removed and the volume of homogenate was measured. Samples for SDS-PAGE were made at once by dilution with Laemmli sample buffer [Laemmli, U.K. (1970) Nature, London 227, 680-685]. The homogenates were then centrifuged as indicated (usually 5 min at 5,000 g or 20 minutes at 28,000 g) . Enzyme assays were made on the homogenates and supernatants and protein determined in the supernatants from A280 and A260 measurements. Table 1. List of important strains and plasmids Name Description Source Saccharomyces cerevisiae X2180 (ATCC 26109) Standard laboratory yeast (diploid) S288C (ATCC 26108) Standard laboratory yeast (haploid) Klg 102 cifl-102, leul, ural, trp5, MATα 1 MV6807 fdpl, leu2, ura3, his3, lys2, ade8, 2 trpl, MATα S150-2B leu2, his3, trpl, ura3, Mata ALK03569 tssl::LEU2 (from S150-2B) This work ALKO3570 tssl : : LEU2 (from S150-2B) This wor WDC-3A cifl::HIS3, his3, ura3, ade2, MATα Escherichia coli HB101 (ALKO 683) ALK03566 HB101 containing pALK752 This wor ALK03568 HB101 containing pALK754 This wor Plasmids pALK751 (DSM 6928) pBluescript containing an ξ.2 kb This wor insert comprising TSLl PALK752 pBluescript containing a 2.5kb This wor insert comprising TSSl PALK753 pBluescript containing a 3.3 kb This wor insert comprising the ORF of TSSl pALK754 pBluescript containing a 4.4 kb This wor insert comprising TSLl pALK756 (DSM 7425) pBluescript containing a 3.5 kb This wor insert comprising at least part of TSL2 PALK757 pBluescript containing an This work insert comprising the ORF of TSLl pMB14 YEp352 containing CIF1 Sources: 1. Dr. D. Fraenkel, Harvard Medical School, U.S.A. 2. Dr. J. Thevelein, Lab voor Plantenbioch. , Heverlee, Belgium. 3. Dr. C. Gancedo, CSIC, Madrid, Spain. Enzyme Assays. TPP and TPS standard assays and other kinetic measurements were made as described by Londesborough & Vuorio [(1991) loc. cit.] except that the standard TPS assay mixture contained 5 mM F6P unless stated otherwise. Where appropriate, TPS assays were corrected by measuring UDP production from UDPG in the absence of G6P and F6P. DNA manipulations. Stratagene's (La Jolla, California) Escherichia coli strain XL-1 Blue {recAl, endAl, gyrA96, thi, hsdR17, supE44,- relAl, lac, [F' proAB, laclq ADM15, TnlO (tetR) ]> were used as host bacteria. When needed, XL-1 Blue cells were made competent by the method of Mandel & Higa (1970) Journal of Molecular Biology 53, 159-162]. The cloning vector was Stratagene's Lambda Zap II, predigested with EcoRI, where the cloning site is near the N-terminus of the gene for β-galactosidase, thus enabling the color selection of recombinant clones. The sequencing vectors M13mpl8 and M13mpl9 from Pharmacia LKB Biotechnology were also used. High molecular mass DNA from the haploid S288C strain was prepared as described Johnston, J.R. [(1988) in Yeast, A Practical Approach, IRL Press, Oxford] and partially digested with either Haelll or EcoRI restriction enzyme. For the large scale Haelll digestion, e.g., a reaction mixture of 330 μl containing 30 μg of DNA and 4.8 U of enzyme was incubated at 37 °C for 60 minutes. The reaction was stopped with 10 μl of 0.5 M EDTA and transferred to ice. The methods for such digestions and their agarose gel electrophoretic analysis are well known in the art and are described, e.g., in Sambrook et al. , Molecular Cloning, A Laboratory Manual [Cold Spring Harbor Laboratory Press, 2nd ed. , (1989)]. Plasmid DNA was isolated using standard methods for small scal purification Sambrook et al. [ (1989) Molecular Cloning, A Laboratory Manual, 2nd ed. , Cold Spring Harbor Laboratory Press, hereby expressly incorporated by reference] . Large scal purifications of plasmid DNA were done with Qiagen tip-100 columns from Diagen following their instructions. DNA sequences were determined either manually by the dideoxy- chain termination method [Sanger et al. (1977) Proceedings of the National Academy of Sciences U.S.A. 74, 5463-5467], sequencing directly from pBluescript plasmids, or automaticall with the Applied Biosystems Model 373A automatic DNA sequencer sequencing either directly from these plasmids or from M13 subclones. Southern and Western hybridizations and other standard manipulations were carried out by well known procedures [see, e.g., Sambrook et al. (1989) loc. cit.]. Example 1. Purification of intact trehalose synthase Intact trehalose synthase was purified from commercial baker's yeast. The method described by Londesborough & Vuorio [(1991) loc. cit.] for purification of "proteolytically activated TPS/P" was modified as follows: 1. All buffers contained 2 mM MgCl- and 1 mM EDTA. This increased yields in the early steps and probably helped to decrease proteolysis in the later steps. 2. In the first ammonium sulphate fractionation, the EDTA concentration was increased to 2.5 mM before addition of ammonium sulphate. 3. All buffers were adjusted to between 0.4 and 1 mM PMSF and between 4 and 10 μg pepstatin A/ml by addition, immediately before use, of the appropriate amount of a freshly prepared stock solution containing 1 mg pepstatin A/ml 0.1 M PMSF in methanol (called, stock PMSF/pepstatin) . When, as in chromatography, buffers were used for several hours, more stock PMSF/pepstatin was added at intervals, but so as not to exceed 1.5 % methanol in the buffer, or a fresh lot of buffer was taken into use, because of the short half-life of PMSF in aqueous solution. All columns were equilibrated with at least one bed volume of buffer containing PMSF and pepstatin A immediately before application of enzyme. 4. Experience permitted the enzyme-containing fractions (a total of 17.8 ml in the preparation of Table 2) from Heparin-Sepharose to be identified as soon as they were eluted. Stock PMSF/pepstatin (150 μl) and 0.1 M EDTA (200 μl) were immediately added to them. Then 7.2 g of powdered ammonium sulphate was slowly added (over 20 min) . After 30 min equilibration, the mixture was centrifuged 15 min at 28,000 g. The pellets were packed for 5 min at 28,000 g and expressed buffer was removed with a pasteur pipette. The pellets were dissolved to 2.0 ml in HB2M1ED containing 0.8 mM PMSF and 8 μg pepstatin A/ml, centrifuged 5 min at.28,000 g and applied to a 2.6 x 34 cm column of Sepharose 6B freshly equilibrated with HB2M1ED containing 50 mM NaCl, 0.4 mM PMSF and 4 μg pepstatin A/ml. The interval between elution from Heparin-Sepharose and application to Sepharose 6B was 5 h. In the Londesborough & Vuorio [(1991) loc. cit.] procedure, the Heparin-Sepharose eluates were stored at about 3 °C, without addition of PMSF or pepstatin A, for 5 days before the second ammonium sulphate fractionation and application to Sepharose 6B. 5. Fractions (3.7 ml) from the Sepharose 6B column were immediately mixed with 20 μl of stock PMSF/pepstatin and then assayed. Again, experience permitted the correct fractions to be pooled, based on activity and A280 measurements without SDS-PAGE analysis, and immediately applied to a 0.7 x 7 cm column of UDP-Glucuronate-Agarose equilibrated with HB2M1ED containing 50 M NaCl, 0.4 mM PMSF and 4 μg pepstatin A/ml. Th enzyme was eluted as described by Londesborough & Vuorio [(1991) loc. cit.] and 10 μl of stock PMSF/pepstatin added to each 1.7 ml fraction. Each fraction was divided into three. Tw portions were stored at -70 °C and one at 0 °C. Table 2 summarizes a purification and Fig. 1 shows the SDS-PAG analysis of fractions eluted from UDP-Glucuronate-Agarose. No obvious differences were apparent between enzyme eluted by 0.2 M NaCl and that eluted by 10 mM UDPG/0.4 M NaCl. The major bands present had molecular masses of 57, 99 and 123 kDa. Several weaker bands were present between the 123 kDa band and about 90 kDa. In Western analyses the 123 kDa, 99 kDa and most if not all, of the fainter bands in this region were recognize by the anti-TPS/P and anti-93K sera. This suggests that the fainter bands are partially degraded long chains. The weak bands at 68 kDa also reacted with the anti-93K serum, but coul be removed by chromatography on DEAE-cellulose (see Example 9) When the antibodies from anti-93K serum that bound to the 99 kDa band were eluted from a nitrocellulose blot [as described by Pringle, J.R. (1991) Methods in Enzymolgy 194, 565-590] and used to probe another blot, they bound also to the 123 kDa band, showing that the two long chains of trehalose synthase have epitopes in common. Intact enzyme binds less tightly to the UDP-Glucuronate-Agaros than the truncated enzyme purified by Londesborough & Vuorio [(1991) loc. cit.] and the proportion of enzyme remaining boun at 0.2 M NaCl varied from preparation to preparation. When #9 of Table 2 was re-run on the same column, 76 % of the TPS activity was again recovered at 0.2 M NaCl (and 25 % by 0.4 M NaCl/10 mM UDPG) , so that overloading of the column is not the reason why this enzyme eluted at 0.2 M NaCl. However, when enzyme eluted at 0.2 M NaCl was truncated with trypsin as described in Example 10, it then bound to the column at 0.2 M NaCl and was only recovered at 0.4 M NaCl/10 mM UDPG. Thus, as well as altering the kinetic properties of the enzyme (see Examples 10 & 12) , this truncation also increases the affinity for UDP-Glucuronate-Agarose. Presumably there are subtle differences in factors such as the amount of adventitious proteolysis and state of aggregation between enzyme eluted at 0.2 M NaCl and that remaining bound. For the preparation summarised in Table 2, the ratio of standard TPP and standard TPS activities increased from 22 % in #9 to 39 % in #14, showing that there are differences, even though they could not be clearly detected by SDS-PAGE. These findings disclose that a highly purified trehalose synthase containing a 57 kDa short chain, a 123 kDa long chain and a 99 kDa polypeptide that is recognised by the anti-93K serum possesses both TPS activity activatable by TPSActivator protein (or F6P) and TPP activity. The rate of-hydrolysis of 1 mM G6P in either phosphate or Hepes buffer was less than 1 % of that of 0.5 mM trehalose-6-phosphate, so that the TPP activity is highly specific. An unexpected finding is that this highly purified preparation contains the 99 kDa polypeptide, which is not present in the purified truncated trehalose synthase. It is disclosed later that this polypeptide is not a degradation product of the long (123 kDa) chain, whereas both the 86 and 93 kDa polypeptides of truncated enzyme contain amino acid sequences that identify them as fragments of the long (123 kDa) chain. This novel preparation possesses some unexpected catalytic properties, which are described in more detail in Example 11. Table 2. Purification of intact trehalose synthase The preparation is from 60 g of pressed baker's yeast. TPS activities "Without Activator" were measured as described by Londesborough & Vuorio [(1991) loc. cit.], i.e., in the absence of F6P. Assays "With Activator" were determined similarly but in the presence of a saturating amount of pure TPS activator (similar values were obtained when some fractions were later assayed in the presence of 5 mM F6P instead of TPS activator, and are shown in parentheses) . ND, not determined. α Based on protein .contents estimated from Coomassie blue- stained SDS -PAGE gels b Results from other preparations show that the activity with excess TPS-activator (or 5 mM F6P) is not, at this step, more than 10 % greater than that without activator. Example 2 Increased expression by S. cerevisiae of the long and short chains of trehalose synthase after consumption of glucose Three 500 ml lots of YP/2 % glucose in 1 1 shake flasks were each inoculated with 1 ml of a suspension of X2180 cells of A600 1.0 and shaken at 200 r.p.m. at 30 °C. At the times shown in Table 3, the cells were harvested, broken and analyzed as described in General Materials and Methods. The 28,000 g supernatants were stored for a week at -18 °C, thawed and re-centrifuged for 20 min at 28,000 g. Portions of 150 μl (each equivalent to 53 mg of fresh yeast) were mixed with 30 μl of anti-TPS/P serum, equilibrated for 30 min at 0 °C and centrifuged for 10 min at 10,000 g. The pellets were washed with 250 μl of HBMED and then dissolved in Laemmli sample buffer and subjected to SDS-PAGE (Fig 2). Bands at 57, 99 and 123 kDa were strong in the sample (C) from stationary phase yeast and in the sample (B) harvested immediately after disappearance of glucose from the medium, but were absent or very weak in the sample (A) from yeast growing in the presence of 1.2 % glucose. Table 3. Appearance of TPS and TPP activities in X2180 yeast grown on YP/2 % glucose. Enzymes were assayed in the 28,000 g supernatants. B C Control experiments (not shown) indicated that pre-immune serum did not precipitate the 57, 99 and 123 kDa bands, and that using 50 μl of serum instead of 30 μl did not precipitate more of these three bands from the C sample. These results disclose that the co-ordinate, 7-fold increase in TPS and TPP activities that occurs during less than 2 h when glucose disappears from the medium is accompanied by increases in the amounts in yeast of three polypeptides, of mass 57, 99 and 123 kDa, that are immunoprecipitated by anti-TPS/P serum. These polypeptides are those found in the intact trehalose synthase purified in Example 1. Thus, increase in the amount of enzyme protein is a major mechanism by which the capacity of yeast to synthesize trehalose is increased. Example 3 Determination of the N-terminal amino acid sequences of peptides isolated from the various polypeptides of trehalos synthase The 57, 86 and 93 kDa polypeptides of the truncated trehalose synthase were separated by SDS-PAGE, digested on nitro¬ cellulose blots and fractionated by HPLC as described by Londesborough & Vuorio [(1991) loc. cit.]. Also, these polypeptides and polypeptides of molecular mass 57, 99 and 123 kDa immunoprecipitated from yeast extracts as described in Example 2 were separated by SDS-PAGE and digested in the gel with lysylendopeptidase C as described by Kawasaki, H. , Emori, Y. and Suzuki, K. (in press) . The derived peptides were . separated by HPLC using a DEAE pre-column before the reverse- phase column essentially as described by Kawasaki et al [(1990) Analytical Biochemistry 186, 264-268]. The 99 kDa polypeptide isolated by chromatography on phosphocellulose in the absence of triton (see Example 9) was digested with lysylendopeptidase C and the peptides separated by HPLC. In all cases, isolated peptides were sequenced in a gas-pulsed liquid phase sequencer as described by Kalkinen, N. & Tilgman, C [(1988) Journal of Protein Chemistry 7, 242-243], the released PTH-amino acids being analysed by on-line, narrow-bore, reverse-phase HPLC. Th sequences are shown in Table 4. Table 4. N-terminal amino acid se uences of peptides isolated from (fragments of) the polypeptides of trehalose synthase. When two sequences were obtained from the same HPLC peak, they are shown as a and b sequences, where possible according to the sequences predicted from the genes. Tentative identifications from the amino acid sequencer are shown by the one letter codes followed by double queries. Unidentified residues are shown by Xaa. (In the Sequence Listings, also tentatively identified residues are indicated as Xaa) . The location of each amino acid sequence in the short (S) and long (123 kDa) (L) chains of Figs 3b and 4b is shown below the sequence. Short (57) chain peptides Tryptic peptides from blots of the 57 kDa polypeptide from truncated trehalose synthase. 848 Tyr-Ile-Ser-Lys (SEQ ID NO:5) (S 463-66) 850 Asp-Val-Glu-Glu-Tyr-Gln-Tyr-Leu-Arg (SEQ ID NO:6) (S 333-41) 859 His-Phe-Leu-Ser-Ser-Val-Gln-Arg (SEQ ID NO:7) (S 223-30) 862a Val-Leu-Asn-Val-Asn-Thr-Leu-Pro-Asn-Gly-Val-Glu- Tyr-Gln (SEQ ID NO:8) (S 231-44) 862b Ser-Val-Val-Asn-Glu-Leu-Val-Gly-Arg (SEQ ID NO:9) (S 342-50) 863 Leu-Tyr-Lys (S 460-2) 864 Glu-Thr-Phe-Lys (SEQ ID NO:10) (S 280-3) 866 Leu-Asp-Tyr-Ile-Lys (SEQ ID NO:11) (S 294-8) 870 Ile-Leu-Pro-Val-Arg (SEQ ID NO:12) (S 196-200) From lysylendopeptidase C digests of immunoprecipitated 57 kDa band 966a Glu-Val-Asn-Xaa-Glu-Lys (SEQ ID NO:13) (S 454-9) 966b Phe-Tyr-Asp-Xaa-L?? (SEQ ID NO:14) (not found) 980 Leu-Xaa-Ala-Met-Glu-Val-Phe-Leu-Asn-Glu-Xaa-Pro-Glu (SEQ ID NO:15) (S 304-16) 981 Tyr-Thr-Ser-Ala-Phe-Trp-Gly-Glu-Asn-Phe-Val-Xaa- Glu-Leu (SEQ ID NO:16) (S 467-80) 987 Phe-Gly-Xaa-Pro-Gly-Leu-Glu-Ile-Pro. (SEQ ID NO:17) (S 63-71) Long (123 kDa) chain peptides Tryptic peptides from blots of the 86 and 93 kDa fragments. 889 D??-Gly-Ser-Val-Met-Gln (SEQ ID NO:18) (L 587-592) 890/891 Leu-Pro-Gly-Ser-Tyr-Tyr-Lys (SEQ ID NO:19) (L 917-23) 892a Ala-Ile-Val-Val-Asn-Pro-Met-Asp-Ser-Val-Ala (SEQ ID NO:20) (see peptide 1299) 892b Met-Ile-Ser-Ile-Leu (SEQ ID NO:21) (L 842-7) From lysylendopeptidase digest of combined 86 and 93 kDa fragments. 1171 Arg-Arg-Pro-Gln-Trp-Lys (SEQ IP NO:22) (L 770-5) From lysylendopeptidase digest of the 86 kPa fragment. 1479 Thr-Leu-Met-Glu-Asp-Tyr-Gln-Ser-Ser-Lys (SEQ IP NO:52) (L 816-26) 1483a Ala-Phe-Glu-Asp-His-Ser-Trp-Lys (SEQ IP NO:78) (L 445-52) 1483b Ala-Gly-His-Ala-Ile-Val-Tyr-Gly-Asp-Ala-Thr-Ser-Thr- Tyr-Ala-Lys (SEQ IP NO:79) (L 1064-79) 1481 Glu-Arg-Leu-Pro-Gly-Ser-Tyr-Tyr-Lys (SEQ IP NO 80) (L 914-23) From lysylendopeptidase digest of the 93 kPa fragment. 1480 Thr-Leu-Met-Glu-Asp-Tyr-Gln (SEQ IP NO:81) (L 816-23) 1484a Ala-Phe-Glu-Asp-His-Ser-Trp-Lys (SEQ IP NO:78) (L 445-52) 1484b Ala-Gly-His-Ala-Ile-Val-Tyr-Gly-Asp-Ala-Thr-Ser- Thr-Tyr-Ala-Lys (SEQ IP N0:79) (L 1064-79) 1485 Glu-Arg-Leu-Pro-Gly-Ser-Tyr-Tyr-Lys (SEQ IP N0:80) (L 914-23) From lysylendopeptidase digests of immunoprecipitated 124 kPa band 1047 Ser-P??-Pro-Gln-Lys (SEQ IP NO:23) (not found) 1048 Phe-Tyr-Arg-Asn-Leu-Asn-Gln-Arg-Phe-Ala-Asp-Ala- Ile-Val-Lys (SEQ IP NO:24) (L 453-67) 1054a Asp-Gly-Ser-Val-Met-Gln-W??-Xaa-G.ln-Leu-I?? (SEQ IP NO:25) (L 587-97) 1054b Asn-Ala-Ile-Asn-Thr-Ala-Val-Leu-Glu-Asn-Ile-Ile- Pro-H??-Xaa-H??-Val-Lys (SEQ IP NO:26) (L 360-77) 1061 Leu-Val-Asn-Asp-Glu-Ala-Ser-Glu-Gly-Gln-Val-Lys (SEQ IP NO:27) (L 1052-63) 1063 V??-Gln-Asp-Ile-Leu-Leu-Asn-Asn-Thr-Phe-N?? (SEQ ID NO:28) (not found) 1375 Phe-Leu-Val-Glu-Asn-Pro-Glu-Tyr-Val-Glu-Lys (SEQ IP NO:50) (L 629-39) 1376 R??-Ile-Thr-Pro-His-Leu-Thr-Ala-Xaa-Ala-Ala (SEQ IP NO:51) (L 245-55) 1377 Thr-Leu-Met-Glu-Asp-Tyr-Gln-Ser-Ser-Lys (SEQ ID NO:52) (L 816-26) 1378-1 Ile-Leu-Glu-Gly-Leu-Thr-Gly-Ala-Asp-Phe-Val-Gly- Phe-Gln-Thr (SEQ ID NO:53) (L 521-35) 1378-11 Gln-Ile-Leu-Xaa-Pro-Thr-Leu-Xaa-Tyr-Gln-Ile-Pro- Asp-Asn (SEQ ID NO:54) (L 427-40) 1380 Phe-Gly-Gly-Tyr-Ser-Asn-Lys (SEQ ID NO:55) (L 319-25) 1381 Phe-Xaa-Thr-Glu-Asn-Ala-Glu-Asp-Gln-Asp-Xaa-Val- Ala-Xaa-Val-Ile-Gly-G??-Ala-Ile-Xaa-Xaa-Ile (SEQ ID NO:56) (L 931-53) 1382 Xaa-Val-Gly-Thr-Val-Gly-Ile-Pro-Thr-Asp-Glu-Ile- Pro-Glu-Asn-Ile-Leu-Ala (SEQ ID NO:57) (L 378-95) The 99 kDa polypeptide From lysylendopeptidase digests of immunoprecipitated 99 kDa band 959 Asp-Thr-Thr-Gln-Thr-Ala-Pro-Val-T??-Asn-Asn-Val- Xaa-Pro (SEQ IP NO:29) 961 Asn-Gln-Leu-Asp-Ala-A??-Asn-Tyr-Ala-Glu-Val (SEQ ID NO:30) 1002a Asn-Leu-Ser-Arg-Trp-Arg-Asn-Tyr-Ala-Glu (SEQ ID NO:31) 1002b Trp-Gln-Gly-Lys (SEQ ID NO:32) 1043 Ile-Gln-Leu-Gly-Glu-Ser-Asn-Asp-Asp-D??-L?? (SEQ ID NO:33) 1055 Glu-Val-Pro-Thr-Ile-Gln-Asp-Xaa-Thr-Asn-Lys (SEQ ID NO:34) 1287 Xaa-Tyr-Xaa-Tyr-Val-Lys (SEQ ID NO:35) 1297a Asn-Gln-Leu-Gly-Asn-Tyr (SEQ ID NO:36) . 1297b Val-Ala-Leu-Thr . (SEQ ID NO:37) 1299 Asp-Ala-Ile-Val-Val-Asn-Pro-Xaa-Asp-Ser-Val-Ala (SEQ ID NO:38) 1306 ' Ser-Leu-Leu-Asp-Ala-Gly-Ala-Lys (SEQ ID NO:44) 1307a Glu-Lys-Pro-Gln-Asp-Leu-Asp-Asp-Asp-Pro-Leu-Tyr- Leu-Thr (SEQ ID NO:45) 1307b D??-Gln-Xaa-His-Gln-Asp-Xaa-Xaa-Asn-Leu-Thr (SEQ ID NO:46) 1308 Phe-Asn-Asp-Glu-Ser-Ile-Ile-Ile-Gly-Tyr-Phe-P??- Xaa-Ala-Pro (SEQ ID NO:47) 1309 Ser-Arg-Leu-Phe-Leu-Phe-Asp-Tyr-Asp-Gly-Thr-Leu- Thr-Pro (SEQ ID NO:48) From lysylendopeptidase digest of 99 kDa protein purified on phosphocellulose 1451 Gln-Leu-Gly-Asn-Tyr-Gly-Phe-Tyr-Pro-Val-Tyr (SEQ IP NO:49) Apart from peptide 966b, all the amino acid sequences determined from the short chain samples have been located in the protein sequence deduced from the TSSl gene (see Figure 3b). Apart from peptides 892a, 1047 and 1063, all the amino acid sequences determined from the 86 and 93 kPa fragments of the long chain and from the intact 123 kPa long chain itself have been located in the protein sequence deduced from TSLl. The HPLC profiles obtained from digests of the 86 kDa fragment were essentially identical with those from digests of the 93 kDa fragment when either trypsin or lysylendopeptidase C was used (not shown) . Also, corresponding HPLC peaks from 86 and 93 kDa digests yielded the same sequences or double sequences (peptide pairs 890 & 891; 1479 & 1480; 1483a,b & 1484a,b; 1481 & 1485) . These results disclose that both the 86 and 93 kDa polypeptides in truncated enzyme are derived from the 123 kDa long chain encoded by TSLl. In particular, it is not the case that one or other of these fragments is derived from the 99 kDa polypeptide, although contamination with minor amounts of (degradation products of) that polypeptide is probable (see below) . None of the 16 amino acid sequences obtained from the 99 kDa polypeptide is encoded by TSLl. The first 5 residues of peptide 1451 from the 99 kDa polypeptide purified on phosphocellulose are identical with the last 5 residues of peptide 1297a from immunoprecipitated 99 kDa polypeptide. This confirms that the 99 kDa polypeptide immunoprecipitated by anti-TPS/P serum from yeast extracts is the same as the 99 kDa polypeptide in purified intact enzyme. These results disclose that the 99 kDa polypeptide is not encoded by TSLl (or TSSl) but by another gene, which the inventors call TSL2. The origin of peptides 1047 and 1067 found in the digest of th intact (123 kDa) long chain is not known. The only peptide fro the long chain fragments of truncated enzyme not encoded by TSLl is 892a from the 93 kDa fragment. This is identical with the last 11 residues of peptide 1299 from the 99 kDa polypeptide. This suggests that the 93 kDa band was contaminated with some material derived from the 99 kDa polypeptide, although this polypeptide itself was not visible in SDS-PAGE analyses of the truncated enzyme. The identical HPLC profiles of digests of the 86 and 93 kDa fragments and the fact that only one peptide derived from the 99 kDa polypeptide was identified in these digests shows that the contamination was at a low level. This discloses that a functional truncated trehalose•synthase with both TPS and TPP activities probably requires only polypeptides encoded by TSSl and TSLl. Example 4 Cloning and seguencing of TSSl (a) Preparation and screening of a yeast genomic DNA library A genomic library was constructed in the bacteriophage lambda vector. Lambda Zap II, using a partial Haelll digest of S___ cerevisiae strain S288C chromosomal DNA, according to Stratagene's Instruction Manual for the Zap-cDNA synthesis kit. The DNA from the ligation reaction was packaged into Giga II Gold packaging extract (Stratagene) according to the manufacturer's instructions (1990) . The titer of the recombinants was determined on Luria broth plates containing X-β-galactoside (5-bromo-4-chloro-3-indoyl-β-D-galacto- pyranoside) as a chromogenic substrate for β-galactosidase and IPTG (isopropyl β-D-thiogalactopyranoside) as an inducer. About 50,000 recombinants were amplified on large (150 mm) NZY-plates according to Stratagene's instructions. The titre of the resulting library was 5 x 10 9 pfu/ml with a total of 150 ml. Several positive clones were found by screening with anti-TPS/P serum. After three rounds of purification, all clones were positive. They were screened again, now with anti-57K serum. For further manipulations of DNA, the plasmid part, pBluescript, of the Lambda Zap vector was excised as described in the manual for Predigested Lambda ZapII/EcoRI Cloning Kit (1989) . (b) Sequencing of TSSl A strongly positive clone from the Lambda ZapII library was selected and sequenced manually. The sequence obtained included an open reading frame that encoded a 58 kDa protein, but none of the short chain peptide sequences disclosed in Example 3 was found in the amino acid sequence encoded by this ORF. Therefore, a second clone was selected, from a group of clones that gave distinct restriction maps compared with the group including the first clone. It also responded less strongly to anti-57K serum, which is why it was not chosen in the first place. It was sequenced using the Exonuclease III/Mung Bean nuclease system for producing series of unidirectional deletions. The deletions were prepared according to Stratagene's manual for the pBluescript Exo/Mung DNA sequencing system. The plasmid was first digested with the restriction enzymes SacI, which leaves a 3' overhang, and BamHI, which leaves a 5' overhang. For filling in possible recessed 3'termini created by Mung Bean nuclease, 2.5 μl of 10X nick-transla ion buffer, l μl of dNTP (a mixture of all four dNTPs, each at 2 mM) and 1 μl (2U) of Klenow fragment were added. The reaction proceeded for 30 min at room temperature and was then stopped with 1 μl of 0,5 M EDTA [Sambrook et al. (1989) loc. cit.]. The deletion time points were run on a 0.8 % low melting agarose gel. The bands were cut out, melted and ligated according to Stratagene's instructions. Portions (5 μl) of each ligation mixture were used to transform XL-1 Blue cells.. The clone proved to encode all the short chain peptide sequences disclosed in Example 3, except the poorly defined pentapeptide, 966b. It is notable that the anti-57K serum alon was an inadequate tool for cloning this gene: the amino acid sequence data disclosed in Example 3 were also essential. Comparison of sequences with the Microgenie Data Bank showed that the gene sequence of the clone was available as an unknow reading frame in the post-translational region of the gene for yeast (S. cerevisiae) vacuolar H + -ATPase. The data in the bank contain sequence errors, and have thus been erroneously interpreted as two short unidentified ORFs instead of one long ORF. The complete sequence of the TSSl gene with 800 bp of promoter and 200 bp of terminator regions is disclosed as SEQ ID NO:l and the amino acid sequence deduced from its 'ORF (starting at nucleotide 796) as SEQ ID NO:2. SEQ ID NO:l now incorporates the following minor corrections to the promoter region, made since February 14th 1992: the original nucleotide 60 and 61 (CA) become AC, original nucleotides 646 to 653 (CGCGTGGT) become GCCGGG and the original nucleotide 711 (C) i deleted. Fig 3A shows the promoter and terminator regions, and Fig 3b shows the deduced amino acid sequence. Example 5 Cloning and sequencing of TSLl and TSL2 (a) Preparation and screening of genomic DNA libraries The gene TSLl was first found in the same library as described in Example 4. Screening was done using first ahti-TPS/P serum and then anti-93K serum. Later, another library was constructe from a partial EcoRI digest of chromosomal DNA from S. cerevisiae. strain S288C, using the methods described in Example 4. The anti-93K positive clones were classified by restriction mapping into groups, not all of which can represen TSLl. (b) Sequencing of TSLl Clones from one group of anti-93K positive clones from the Haelll library were partially sequenced manually and then automatically from pBluescript exonuclease deletion series as described in Example 4. The Haelll clones did not contain the whole of this long gene, and the N-terminus was not found in any clone. Therefore, the new EcoRI library was constructed and screened, first with anti-93 serum and then with nucleotide probes derived from the sequenced parts of TSLl. Several anti-93K positive clones, which also hybridized with the nucleotide probes, were obtained. These contained a plasmid with an 8.2 kb insert. From this plasmid a 2 kb fragment was cut with restriction enzymes StuI and Seal, religated into the pBluescript Smal site and sequenced using exonuclease deletions. The deletions were started using the enzymes Sad and Spel. Sequencing was done with the automatic sequencer. The sequence of TSLl was thus completed. The complete sequence is contained in the 8.2 kb insert of the EcoRI clones, and has been deposited as plasmid pALK751 on February 18, 1992 with the Deutsche Sammlung von Microorganismen (DSM) , Gesellschaft fur Biotechnologische Forschung GmbH, Grisebachstr. 8, 3400 Gδttingen, Germany and given the accession number DSM 6928. The sequence is shown as SEQ ID NO:83. Nucleotides 2282 to 5575 comprise an ORF that encodes the amino acid sequence SEQ ID NO: 82. The promoter and terminator regions and amino acid sequence are also shown in Fig 4. The amino acid sequence includes the amino acid sequences obtained from (fragments of) the long (123 kDa) chain of trehalose synthase disclosed and discussed in Example 3. {c) Isolation and sequencing of TSL2 The information disclosed about the 99 kDa polypeptide {especially in Examples 1 & 3) provides obvious procedures for the isolation and characterization of the TSL2 gene by one ordinarily skilled in the art. Because the anti-93K serum recognizes the 99 kDa polypeptide, anti-93K positive clones isolated as described ' above can include clones representing TSL2. Several positive clones not representing TSLl were identified by restriction mapping. One of these was deposited on January 28th 1993 as the plasmid pALK756 (see Table 1) with the Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Mascheroder Weg 1 B, D-3300 Braunschweig, Germany (Accession number DSM 7425). This plasmid comprises a 3.5 kb insert in pBluescript. The insert was not cut by the restriction enzymes, NotI, Sad, Spel or Xhol. The sequences of these and similar clones can be examined to identify an ORF that encodes the amino acid sequences of peptides isolated from the 99 kDa polypeptide (viz., SEQ ID NO:S 29 to 38 and 44 to ' 49) . Another well established procedure is to use these amino acid sequences to design nucleotide primers that can be used to amplify parts of the TSL2 gene by the polymerase chain reaction. When a part of the TSL2 gene has been isolated and sequenced by either procedure, the rest of the gene can be easily isolated as described for TSLl. Example 6. Characterization of TSSl and TSLl . The nucleotide sequence of TSSl encodes a polypeptide of 495 amino acid residues with a calculated molecular mass of 56 kDa. This open reading frame starts with an ATG codon and ends with two TGA codons. The promoter region contains a TATA box at -186 (see Fig 3) and the sequence CCCCGC at -270, which has been implicated in catabolite repression [Nehlin & Ronne, (1990) European Molecular Biology organization Journal 9, 2891-2898]. This may account for the low expression of trehalose synthase in the presence of glucose disclosed in Example 2. The open reading frame of TSLl encodes a polypeptide of 1098 amino acids, corresponding to a calculated molecular mass of 123 kDa. This ORF starts with an ATG codon and ends with a TAA codon. Sixty base pairs downstream from the TAA codon is a possible TATATA transcription termination element [Russo et al. (1991) European Molecular Biology Organization Journal 10, 563- 571]. The promoter -sequence of TSLl contains two putative TATA boxes at -100 and -117. The promoter was searched for possible heat shock elements and four AAGGGG elements were found (-166, -180, -232 and -378). Of these, the one furthest upstream, at -378, was part of the sequence GGTAAAAGGGGCGAA. which corresponds well to the UAS_ 360 heat shock stress control element GGTAAGGGGCCAA [Marchler, G. et al (1992) Yeast 8, S154]. Two copies of the canonical heat shock element GAANNTTC were found, one at -353 and the other at -425; thus, one on either side of the UAS. 36fJ element. The sequence GCCCCTGCATTTT at -327 could be a MIG1 protein binding site (the consensus sequence is TCCCCRGATTNT) . MIG1 appears to act as a repressor of transcription in the presence of glucose [Nehlin, J.O. & Ronne, H. (1990) European Molecular Biology Organization Journal 9, 2891-2898; Nehlin, J.O. et al (1991) ibid 10, 3373-3378]. These features of the TSLl sequence are shown in Fig 4. The amino acid sequence encoded by TSLl contains two polyglutamine tracts, four Qs starting at amino acid 42 and five Qs starting at 164. Such glutamine-rich sequences have been associated with heteromeric protein-protein interaction [Gancedo, J.-M. (1992) European Journal of Biochemistry 206, 297-313]. Fig. 5 discloses that the entire TSSl gene exhibits 37 % identity at the amino acid level to a 502 amino acid stretch from the middle of the TSLl product. The genes are obviously closely related. Most surprisingly, the TSSl gene is identical to the CIFl gene that has been recently cloned and sequenced by Gancedo's group [Gonzales et al (1992) Yeast 8 183-192]. This disclosure reveals that special methodology is required to handle mutants containing modified forms of the TSSl gene, because cifl mutants have severe defects in sugar metabolism, as discussed in the Detailed Description. It also explains, of course, why no recognisable short chain is present in the Klg 102 mutants, which carry the cifl mutation (see Example 7) . Previously, it has been (tacitly) assumed that failure of cifl and fdpl mutants to express TPS activity is the consequence of a lengthy cascade of regulatory effects. The findings disclosed here and in Example 7 show that absence of the short chain of trehalose synthase is the primary defect, from which, in an as yet completely obscure way, the other regulatory defects of these mutants result. S.cerevisiae chromosomes were separated by pulsed field electrophoresis, with pulse times of 60 sec for 15 h and 90 sec for 9 h at 200 volts, as recommended by the instruction manual for the CHEF-DR II BioRad Laboratories, Richmond, California]. Genes were located using digoxigenin-labelled non-radioactive probes, following the instructions in the manual by Boehringer Mannheim. The following probes were used: a 2.1 kb Dral restriction fragment from TSLl and a 1.9 kb Narl-Smal restriction fragment of TSSl (the Smal site is in the linker between the insert and the vector; important restriction sites in TSSl and TSLl are shown in Fig 6) . TSSl was located exclusively on Chromosome 2, which is where both FDPl [Van de Poll and Schambert (1977) loc. cit.] and CIFl [Gonzales et al. (1992) loc. cit.] have been located. This disclosure further strengthens the evidence for the identity of TSSl with CIFl and FDPl. By using the GalH gene as a marker for chromosome 16 TSLl was located exclusively on the adjacent Chromosome 13. Immediately downstream of TSLl lies, in opposite orientation, the ARGRII gene, sequenced by Messenguy et. al. [(1986) European Journal of Biochemistry 157, 77-81]. The start of the overlapping sequence is shown in Fig 4. Example 7 A functional TSSl gene is required for expression of both TPS and TPP activities The S. cerevisiae mutant Klg 102, was obtained from Dan Fraenkel (Harvard Medical School) and has the genotype MATα, ural, leul, trp5, cif1-102. It was routinely grown on YP/2% galactose or YP/2% glucose, and long term storage was under liquid nitrogen. As reported by others [Navon, G. , et al. (1979) Biochemistry 18, 4487-4499; Baήuelos, M. & Fraenkel, D.G. (1982) Molecular and Cellular Biology 2, 921-929], this mutant would not grow on YP/2% fructose, though revertants were frequent. Six individual colonies from each of two substrains of Klg 102, ALKO 2669 and ALKO 2670, that differed in reversion frequency and colony size, were streaked onto YP/2% fructose and YP/2% glucose at 30 °C. After 45 h, all 12 streaks were growing on glucose, although slower than the control yeast, X2180, but none showed any growth on fructose. After 4 days, five of the ALKO 2669 streaks showed several large, but isolated colonies on fructose and one ALKO 2670 streak showed several small colonies on fructose. From the glucose plates, three streaks from each substrain were chosen for the smallest number of revertants on the corresponding fructose plate, and used to inoculate 100 ml portions of YPD in 250 ml shake flasks, and grown at 200 r.p.m. and 30 °C. Three parallel flasks were inoculated with X2180. A600 and residual glucose in the media were monitored and samples were plated out quantitatively onto YP/2% glucose and YP/2% fructose. The ALKO 2669 cultures grew faster than the ALKO 2670 cultures, and both grew much slower then X2180 (not shown) . At appropriate times the cells were harvested, broken and analyzed as described in the General Materials and Methods. Results are shown in Table 5. Table 5. Growth of Klg 102 and X2180 strains on YPD The cultures were performed as described in the text. Residual glucose and cell mass are given as, respectively, g/100 ml and mg/ml of growth medium. Phosphoglucoisomerase (PGI) was determined as described in Example 11. PGI, TPS and TPP are given as U/g of wet cells (TPS was determined in the presence of 5 mM F6P) . Trehalose is given as mg/g of wet cells. Viability Fru/Glu shows the number of cells able to grow on fructose as a percentage of the number of cells able to grow on glucose at the time of harvesting. Cells from the cultures 2670/1 and 2670/2 were combined for breakage and subsequent analysis. ND, not determined. These results show that TPS activity was below the detection level in the Klg 102 samples and less than 0.5 % of the value in X2180, which is typical of wild type S. cerevisiae. This agrees with previously reported results [Paschoalin, V.M.F., et al. (1989) Current Genetics 16, 81-87]. Surprisingly, however, TPP activities were also very low, between < 1 % and 5 % of the X2180 values. Even this residual ability to hydrolyse trehalose-6-phosphate is likely to be due to non-specific phosphatases. Paschoalin et al. [(1989) loc. cit.] claim that Klg 102 specifically lacks UDPG-linked TPS activity, but that, like the wild-type yeast S288C (which is the haploid form of X2180) , it contains an ADPG-linked activity. If this were true and accepting the conventional view that trehalose synthesis i yeast proceeds via free trehalose-6-phosphate, Klg 102 should contain significant TPP activity. Our results disclose that this is not the case. Furthermore, when we tested whether wild type yeast (X2180) was able to synthesise [ 1 C]-trehalose from [ 14 C]-G6P in the presence of UDPG or ADPG, we found significant activity only in the presence of UDPG. The assay systems used by Paschoalin et al. [(1989) loc. cit.] have been criticised b Vandercammen et al. [(1989) loc. cit.], so we tested the overall reaction directly. Yeast extracts were incubated in 40 mM HEPES pH 6.8 containing 1 mg BSA/ml, 10 mM MgCl- and 10 mM [U 14 C]-G6P (736 c.p.m./nmol) in the presence or absence of 5 mM UDPG or 2.5 M ADPG and presence or absence of 5 mM K phosphate. Reactions were stopped by boiling for 2 min and addition of AG1-X8 (formate) anion exchange resin, as in the TPP assay system described by Londesborough & Vuorio [ (1991) loc. cit.]. Results are shown in Fig 7. Without UDPG or ADPG, radioactivity appeared in the resin supernatants, presumably due to phosphatases active on G6P. UDPG caused a clear increas in this rate in the absence of phosphate and a marked increase in the presence of 5 mM phosphate, which stimulates the TPP activity and inhibits the TPS activity of trehalose synthase. With UDPG and 5 mM phosphate, the increase in rate corresponded, after a lag phase, to 0.94 μmol/min/g of fresh yeast, which is about 50 % of the TPP activity of this yeast a 20 mM phosphate. ADPG, however, did not cause any significant increase in the rate of appearance of radioactivity in the resin supernatant, indicating that no ADPG-linked TPS activity was present. Western blots of the homogenates of Klg 102 and X2180 yeast ar shown in Fig. 8. The origin of the bands marked D is not clear they may be degraded short chain. X2180 shows a strong 57 kDa band, due to the short chain of trehalose synthase and several weak bands at 100 to 130 kDa due to intact and truncated versions of the long chain. In contrast, although the Klg 102 samples showed stronger long chain bands, because more yeast sample was applied to the gel, they showed no trace of a short chain band. Thus, Klg 102 does not contain a recognisable form of the product of the TSSl gene (it might contain a truncated version lacking the epitopes recognised by our polyclonal antibodies) , but contains normal amounts of the TSLl product. Furthermore, the TSLl product appears to increase as Klg 102 traverses the diauxic lag (compare e.g. lanes 3 and 2 of Fig. 8) , suggestinq that expression of the long chain of trehalose synthase in this yeast increases when all glucose is consumed. In wild type yeast, increases in both short and long chains occur concomitant with the increases in TPS and TPP activities when glucose is consumed (Example 2) . These results disclose that the failure of Klg 102 to express ' immunologically recognisable short chain of trehalose synthase is correlated with the absence of both TPS and TPP activities. This unexpected behaviour, in contradiction of the views of Paschoalin et al. [(1989) loc. cit.], indicates that a functional short chain is required to assemble a trehalose synthase with either partial activity. Similar experiments were done with S. cerevisiae, strain MV6807 (obtained from Johan Thevelein, Laboratorium voor Moleculaire Celbiologie, Instituut voor Plantkunde, Heverlee, Belgium) , which carries the fdpl mutation, which is allelic to CIFl and TSSl. This strain grew poorly on glucose (fructose was not tested) and so was grown on galactose. Stationary phase cells contained 6 ± 6 % of normal TPS but about 20 % of normal TPP. Western analyses showed the presence of a band at 57 kDa recognised by anti-57K serum as well as normal long chain bands, so the mutation in MV6807 must be an aminoacid substitution. Apparently, this substitution causes a greater decrease in TPS activity than TPP activity. Example 8. Biochemical evidence that a long chain of trehalose synthase is reguired for TPP activity Truncated trehalose synthase containing the short (57 kDa) chain and the 86 and 93 kDa long chain fragments was prepared according to the method of Londesborough & Vuorio (1991) loc. cit.] for proteolytically activated TPS/P complex. TPS and TPP activities were assayed as described by Londesborough & Vuorio [(1991) loc. cit.]. [N-ethyl-l- 14 C]- maleimide (ethyl-labelled NEM; 40 mCi/mmol) was NEC-454 from New England Nuclear. N-ethyl-[2,3- 14 C]-maleimide (ring-labelled NEM; 6 mCi/mmol) was CFA 293 from Amersham International. Both were obtained as solutions in n-pentane and the manufacturer's stated specific activities were assumed to be correct. Unlabellerd N-ethyl- maleimide (NEM) was E-3876 from Sigma. It was -dissolved in 25 mM HEPES pH 7.0 immediately before use and standardized by absorption measurements at 305 nm, assuming an E of 0.62. Treatment of truncated trehalose synthase with 1.9 mM NEM at 24 °C in the presence of about 0.17 mM dithiothreitol (which presumably rapidly consumes about 0.34 mM NEM) caused a rapid and essentially complete (> 98 %) loss of TPP activity, but little (< 24 %) loss of TPS activity (Fig. 9) . This suggested that NEM modified one or more amino acid (presumably cysteine) side chains that are required intact for TPP but not for TPS. To permit quantitative experiments with low concentrations of labelled NEM, the dithiothreitol in the enzyme preparation was removed by gel-filtration through Pharmacia NAP5 columns equilibrated with 1 mg BSA/ml of 25 mM HEPES pH 7.0 containing 2 mM MgCl-, 1 mM EDTA and 0.2 M NaCl. Recoveries of TPS and TPP activities through this gel-filtration were above 85 %. In one experiment, 2.0 μl of 2.4 mM ethyl-labelled NEM was mixed with 150 μl of gel-filtered enzyme and incubated at 23 °C. Samples (10 μl) taken at various times up to 190 min were mixed with 60 μl of Laemmli sample buffer (the mercapto-ethanol in this buffer should destroy residual NEM) , boiled for 5 min and subjected to SDS-PAGE. At closely similar times (and also at 23 h) other samples (10 μl) were mixed with 100 μl (for TPS) or 700 μl (for TPP) of 5 mg BSA/ml 25 mM HEPES pH 7.0 containing 2 mM MgCl-, 1 mM EDTA, 0.2 M NaCl and 1 mM dithiothreitol (the dithiothreitol should destroy residual NEM) and assayed for TPS and TPP. The enzyme dilution used for the TPP assay was sufficient that radioactivity from the NEM (about 1/3 of which remains in the resin supernatant) did not interfere with the TPP determinations. After electrophoresis, the upper (cathode) buffer, containing most of the added radioactivity, was completely removed before disassembling the apparatus. The gel was then fixed, stained and destained as described by Laemmli [(1970) Nature, London 227, 680-685] and dried. An autoradiogram of this gel (Fig. 10) showed that the 93 kDa band (and also BSA) became labelled during the experiment, while the 86 and 57 kDa bands were much more weakly labelled. The Coomassie blue stained bands and adjacent, empty areas (as blanks) were cut out of the dried gel (in later experiments, they were cut from undried gels) , broken up and extracted overnight with 1 ml of 5 % SDS in pre-blanked scintillation vials. Then 10 ml of a toluene/Triton XlOO-based scintillant was added, and the tubes were repeatedly counted using a wide energy window to minimise quench effects. After 10 h constant counting levels were reached. Excess radioactivity was calculated by subtracting a blank value obtained from empty regions of the gel. Results are shown in Fig. 11. In control experiments, in which enzyme was omitted, it was shown that the excess radioactivity found in the 93 and 86 kDa bands did not originate from potential labelling of impurities in the BSA. Fig. 11 shows that label from NEM enters mainly the 93 kDa fragment of the long chain, with relatively small amounts entering the 86 kDa fragment and the 57 kDa short chain. Also, the amount of label entering the long chain fragments (93 + 86 kDa) is roughly proportional to the loss of TPP activity, but lags increasingly behind this loss: at 10.5 min 30 % of the initial TPP was lost and 0.20 moles of NEM had entered the lon chain fragments per mole (150 Kg) of enzyme, whereas at 190 min, 56 % of TPP was lost and 0.32 moles of NEM had entered th long chain fragments. Possibly, since trehalose synthase may b an octamer (its native molecular mass is about 800 kDa) , reaction of one long chain with NEM can eventually lead to los of activity associated with the other long chains in the octamer. Fig. 12 collates data from several experiments, using both ring- and ethyl-labelled NEM. Parallel experiments with " identical concentrations of ring- and ethyl-labelled NEM suggested that about 25 % of the radioactivity from ethyl- labelled NEM originally fixed in the protein was lost during SDS-PAGE processing (some loss is expected in acidic condition) , and the results with ethyl-labelled NEM have been corrected accordingly. Within the limits of accuracy (a specific activity of 30 TPS units/mg was used to calculate the mass of protein and a dimer molecular mass of 150 kDa was assumed for the truncated enzyme) complete loss of TPP reflected incorporation of rather less than 1 mole of NEM into specifically, the long chain fragments. Another reagent with high specificity for cysteine, dithiodinitro-benzoate (DTNB) , also caused a specific loss of TPP activity: after 10 min treatment with 0,9 mM DTNB over 95 of the TPP was lost and less than 28 % of the TPS. These findings disclose that TPP activity requires a long chai with a proper structure, because modification of a single amin acid (presumable cysteine) residue in the 93 kDa fragment eliminates TPP but not TPS activity. Sequencing data given in Example 3 disclosed that the 93 kDa band contained material from both the 99 kDa and 123 kDa long chains. Thus, the presen results disclose that either the 99 kDa or the 123 kDa or both long chains are involved in TPP activity. Example 9. An isolated 99 kDa polypeptide from trehalose synthase contains TPP activity Because the long and short chains of trehalose synthase were dificult to separate by usual chromatographic procedures, fractionations were attempted in the presence of a non-ionic detergent. Puring fractionation with a NaCl gradient on PEAE-cellulose (Whatman PE52) in 1 % Triton X100 at pH 8.0, the enzyme was recovered in about 90 % yield at 140 mM NaCl. Some minor polypeptides (e.g. the weak 68 kPa polypeptides visible in Fig 1) were removed, but the main 57, 99 and 123 kPa polypeptides were not resolved. However, the ratio of the 99 and 123 kPa bands changed from about 1.5 to 0.3 across the enzyme peak, while concomitantly the TPP/TPS ratio decreased steadily from 0.54 to 0.42 (data not shown). This suggested that the procedure was partially resolving trehalose synthase molecules, enriched in the 99 kPa polypeptide from those enriched in the 123 kPa polypeptide and that the former had a relatively higher TPP activity. By extrapolation it can be . calculated that the TPP/TPS ratio of (hypothetical) enzyme containing only 57 and 99 kPa chains would be 0.65 + 0.10, whereas that of enzyme with only 57 and 123 kPa chains would be 0.32 ± 0.10. Because the long chain appears to contain an avid phosphate binding site (see Examples 10 and 12) , chromatography on phosphocellulose was attempted. Native trehalose synthase (4.2 TPS units) was transferred above a PM10 membrane in an Amicon cell to 25 mM HEPES pH 7.0 containing 2 mM MgC12, 1 mM EPTA, 1 mM dithiothreitol and 0.3 % Triton X100 (HMEP/0.3 %T) and applied to a 0.7 x 4.2 cm column of phosphocellulose (Whatman Pll-cellulose) equilibrated with the same buffer. The column was washed with 4 ml of HMEP/0.3 %T and. developed with a linear gradient from zero to 0.6 M NaCl in 60 ml of HMEP/0.3 %T at 5 ml/h. By 0.35 M NaCl only traces of TPS had been eluted (< 3 % in the first 9 ml and < 9 % spread between 0.15 and 0.35 M NaCl) . The gradient was interrupted and the column was washed sequentially with (a) 8 ml of 10 mM fructose-6-phosphate in HMED/0.3 %T/0.35 M NaCl, (b) 6 ml of HMED/0.3 %T/0.6 M NaCl an (c) 0.2 M K phosphate pH 7.0/2 mM MgCl 2 /l mM EDTA/1 mM dithiothreitol. No TPS or TPP activity was recovered except in a single 1.5 ml fraction in which the 0.6 M NaCl began to elute. This contained 12 % of the applied TPP, but <0.1 % of the applied TPS. Fractions were examined by SDS-PAGE (Fig. 13) , which showed: (l) almost pure short chain eluted at and just before the star of the NaCl gradient in fractions devoid of enzyme activity; (2) traces of short and long chain eluted diffusely at about 0.2 to 0.35 M NaCl in fractions containing altogether < 7 % of the applied TPS activity; (3) at least 50 % and possibly all o the applied 99 kDa polypeptide eluted at 0.6 M NaCl in the fraction containing 12 % of the applied TPP activity; and (4) most of the 123 kDa polypeptide remained bound to the column. Intact trehalose synthase has also been fractionated on phosphocellulose in the absence of Triton, and with elution by a simple linear gradient from 0 to 0.6 M NaCl. Pure or nearly pure 99 kDa polypeptide eluted at about 0.45 M NaCl and contained specific TPP activity ( 14 C-G6P was not hydrolyzed) . This activity differed from the TPP activity of intact trehalose synthase in that the ratio of activities at 25 mM phosphate and 50 mM Hepes was between 1.5 and 3 in different experiments (cf, this ratio is 5 to 6 for intact trehalose synthase) . Furthermore, during storage of the isolated 99 kDa polypeptide at 0 °C, the TPP activity at 25 mM phosphate decreased and that at 50 mM Hepes increased, until the ratio was about 0.7 after 7 weeks. These findings disclose that the 99 kDa polypeptide isolated from intact trehalose synthase is a specific trehalose-6- phosphatase, but that its catalytic properties are unstable and differ from the TPP activity of intact trehalose synthase. Together with the disclosure in Example 7 that yeast requires properly functional TSSl gene to exhibit TPP activity, the results suggest that proper folding of the 99 kDa polypeptide requires the presence of the 57 kDa chain. These findings also disclose that when the short chain is separated from the long chain by chromatography in a buffer containing 0.3 % Triton, in which intact trehalose synthase is stable, it rapidly looses any TPP or TPS activity it possessed when correctly folded in the trehalose synthase. The findings also indicate that the full-length long chain has extraordinarily high affinity for phosphocellulose, which is consistent with the location of a high affinity phosphate binding site in a terminal portion of this chain as suggested by Examples 10 and 12. Example 10 Truncation of the 123 kDa long chain of trehalose synthase bv trypsin in vitro dramatically increases TPS activity Removal, of the N-terminal 325 or so amino acids from the 123 kDa long chain of intact trehalose synthase by treatment with trypsin in vitro produces an enzyme with catalytic properties like those of the truncated enzyme purified by Londesborough & Vuorio [(1991) loc. cit.1. In one experiment intact trehalose synthase (0.28 TPS units, « 9.4 μg) was incubated with or without 0.5 μg of trypsin at 30 °C in 250 μl of 13 mM HEPES pH 7.0 containing 1 mM MgCl-, 0.5 mM EDTA, 0.5 mM dithiothreitol, 0.2 M NaCl and 0.5 mM benzamidine. Its TPS activity was determined at intervals using standard assay mixtures (containing 5 mM F6P) containing no or 4 mM K phosphate pH 6.8, and samples were prepared for SDS-PAGE analysis immediately before and 48 min after addition of the trypsin. During the first 48 min the TPS activity measured in the absence of phosphate decreased faster in the presence of trypsin than in its absence. However, in the first 10 min, trypsin caused a 4-fold increase in the activity measured at 4 mM phosphate, and by 48 min the activities with and without phosphate were essentially equal (Fig. 14) . By 48 min, the 123 kDa full length long chain had disappeared and been replaced b a doublet of polypeptides at 85 kDa (Fig. 15) . In contrast, th short chain (57 kDa) was unchanged and the 99 kDa band was onl slightly decreased in strength. The changes in TPS activity were accompanied by loss of about 50 % of the TPP activity. Which part of the 123 kDa chain was removed by trypsin was determined as follows. Intact trehalose synthase (180 μg) was transferred to 0.5 ml of 25 mM HEPES pH 7.0 containing 2 mM MgCl-, 1 mM EDTA, 1 mM dithiothreitol and 0.2 M NaCl using a Centricon 30 tube, and then treated with 11 μg trypsin at 25°C. The standard TPS activity did not decrease during the trypsin treatment, whereas TPS activity measured in the absence of F6P and presence of 10 mM phosphate increased from 26 % to 73 % ' of the standard activity during the first 30 min of treatment. After 68 min treatment, when SDS-PAGE analysis showed the complete disappearance of the 123 and 99 kDa bands and appearance of a doublet with apparent molecular mass about 85 kDa (the components differing by about 1.5 kDa), the mixture was centrifuged through a Centricon 30 tube to separate the tryptic peptides from the core enzyme. The retentate was then boiled in 0.5 % SDS and again centrifuged through the Centrico 30 tube. The combined filtrates were diluted to 0.1 % SPS and incubated for 18 h at 25 °C with 4 % by weight of endoproteinase Glu-C (Boehringer) . The peptides were then separated by HPLC using a PEAE pre-column and sequenced as described in Example 3. Twenty sequences were obtained (Seq IP NOs 58 to 77 in Table 6) . Fifteen of these were found in the N-terminal 325 amino acids coded by TSLl. One (peptide 1407, recovered at less than half the yield of the others) was amino acids 1089 - 1093, i.e., 5 amino acids from the C-terminus of the protein coded b TSLl. This peptide is presumably derived by endoproteinase Glu C cleavage of the tryptic peptide starting after Lys 1079. Both the 86 and 93 kPa long chain fragments in the truncated trehalose synthase purified by Londesborough S Vuorio [(1991) loc. cit. ] are disclosed in Example 3 to contain a peptide (1483b & 1484b) derived from Alal064 to Lysl079, confirming that the truncated polypeptides extend at least this close to the C-terminus of the full length 123 kPa chain. The N-terminal peptide furthest from the N-terminus was peptide 1443, obtained by cleavage after Arg 335. Thus, the truncated long chain extends from Ser 336 to Lys 1079 or Asp 1098, and is predicted to have a molecular mass of 87.3 or 86.2 kPa. The SPS-PAGE analysis of trypsin-treated enzyme suggests both of these truncated chains are formed, and because the TPS activity in the presence of F6P changes little during the trypsin treatment, the two truncated " chains probably have similar activities. « Of the remaining four peptides in Table 5, two (1419b and 1437b) are still unidentified, but may originate from the 99 kPa polypeptide, whereas two (1442 and 1451) clearly originate from that polypeptide. Thus, peptide 1442 is identical to peptide 1307a of Table 4, and the first 5 amino acids of peptide 1451 are identical to peptide 1297a (Table 4). These results disclose that removal of the N-terminal 325 amino acids of the long chain, with or without removal of the C- terminal 19 amino acids, results in a trehalose synthase that is relatively insensitive to inhibition by phosphate, and does not require F6P for full activity. Analysis of the secondary structure of the long chain according to Gamier et al [(1978) Journal of Molecular Biology, 120, 97-120] suggests that whereas the C-terminal 700 amino acids are likely to be in alpha-helices or beta-sheets, the N-terminal 360 amino acid portion of the protein is relatively.devoid of such structures. Taken together, these data suggest that the N-terminal 330 or so amino acids comprise a distinct domain, that confers regulatory properties upon the TPS activity of trehalose synthase, including sensitivity to inhibition by phosphate and a requirement for F6P to express full catalytic activity. Thus the TSLl gene product must also be involved in TPS activity. Table 6 Peptides released from intact trehalose synthase durin activation bv limited treatment with trypsin. When two sequences were obtained from the same HPLC peak, they are shown as a and b sequences, assigned according to the sequences predicted from the TSLl gene. Tentative identifications from the amino acid sequencer are shown by one letter codes and double queries; unidentified residues Xaa. (I the Sequence Listings also tentative identifications are indicated as Xaa) . The location of each amino acid sequence in the long (123 kPa) chain of trehalose synthase in Fig 4b is shown below the sequence. 1400 Leu-Leu-Val-His-Ser-Leu-Leu-Asn-Asn-Thr-Ser-Gln-Thr-Ser- Leu-Glu-Gly-Pro-Asn (SEQ IP NO:58) (181-200) 1401 Ser-Ser-Thr-Thr-Asn-Thr-Ala-Thr-Leu-Xaa-Xaa-Leu-Val-Ser- Ser-Xaa-Ile-Phe-Met-Glu (SEQ IP NO-.59) (84-104) 1406 Ala-G??-Asn-Arg-Pro-Thr-Ser-Ala-Ala-Thr-Ser-Leu-Val-Asn- Arg (SEQ ID NO:60) (210-24) 1407 Xaa-Phe-Thr-Ile-Ile-S?? (SEQ ID NO:61) (1088-93) 1408 Asn-Leu-Thr-Ala-Asn-Ala-Thr-Thr-Ser-His-Thr-Pro-Thr-Ser- Lys (SEQ ID NO:62) (105-19) 1409 Phe-G??-G??-Tyr-Ser-Asn-Lys (SEQ ID NO:63) (319-25) 1416 S??-Pro-S??-Ala-Phe-Asn-R?? (SEQ ID NO:64) (77-83) 1417a Ile-Ala-Ser-Pro-Ile-Gln-T??-Glu (SEQ ID NO:65) (145-52) 1417b Gln-Arg-Pro-Leu-Leu-Ala-Lys (SEQ ID NO:66) (257-63) 1418 Phe-Phe-Ser-Pro-Ser-Ser-Asn-Ile-Pro-Thr-Asp-Arg (SEQ ID NO:67) (133-44) 1419a Ala-Leu-Ser-Asn-Asn-Ile-Ser-Gln-Glu (SEQ ID NO:68) (47-55) 1419b A??-L??-S??-Tyr-Thr-Pro (SEQ ID NO:69) (not found) 1420 Ile-Ala-Ser-Pro-Ile-Gln-Gln-Gln-Gln-Gln-Asp-Pro-Thr-Ala- Asn-Leu (SEQ ID NO:70) (159-74) 1437a Thr-Met-Leu-Lys-Pro-Arg (SEQ ID NO:71) (120-25) 1437b Ile-Ile-Glu-Asp-Glu-Ala (SEQ ID NO:72) ((not found) 1438 Ile-Thr-Pro-His-Leu-Thr-Ala-Ser-Ala-Ala-Lys (SEQ ID NO:73) (246-56) 1439 Ser-Leu-Val-Ala-Pro-Ala-Pro-Glu (SEQ ID NO:74) (56-63) 1442 Lys-Pro-Gln-Asp-Leu-Asp-Asp-Asp-Pro-Leu-Tyr-Leu (SEQ ID NO:75) (from 99 kDa) 1443 Lys-Tyr-Ala-Leu-Leu-Arg (SEQ ID NO:76) (330-35) 1451 Gln-Leu-Gly-Asn-Tyr-G??-Phe-Tyr-Pro-Val-Tyr (SEQ ID NO:77) ((from 99 kDa) Example 11 Identification of the TPS activator as phosphoglucoisomerase TPS activator was transferred to 0.1 M Tris/HCl pH 9.0 above a PM10 membrane in an Amicon cell. A 300 μl sample (34 μg) was digested for 20 h at 37 °C by 0.8 μg of lysylendo-peptidase C (Wako) . Peptides were separated by HPLC and sequenced as described in Example 3. All five sequences obtained and disclosed in Table 7 are identical to sequences found in yeast phosphoglucoisomerase (PGI) . Table 7. Peptide sequences from TPS activator The PGI sequences are from Tekamp-Olson, P., et al. (1988) Gene 73, 153-161. TPS-Activator Peptide PGI Residues TA1156 TFTNYDGSK 51 - 59 (SEQ ID NO:39) TA1158 TGNDPSHIAK 241 - 251 (SEQ ID NO:40) TA1159 IYESQGK 24 - 30 (SEQ ID NO:41) TA1160 AEGATGGLVPHK 456 - 467 (SEQ ID NO:42) TA1161 LATELPAXSK 11 - 19 (SEQ ID NO:43) The PGI activity of a sample of TPS activator that had been stored for several months at 0 °C was measured in 50 mM HEPES/KOH pH 7.0, 5 mM MgCl 2 , 5 mM F6P and 0.4 mg/ml NADP. A specific activity of 190 U/mg was found. These findings disclose that TPS activator from S. cerevisiae is identical to PGI. Example 12 discloses that F6P is a powerful activator of the TPS activity of intact, but not of truncated, trehalose synthase. Because the assay mixtures for TPS contain G6P, it is clear that TPS activator can activate TPS by producing F6P from the substrate G6P. This is a complete explanation for the activation. Thus, at initial concentrations of 6.7 mM G6P and 1.9 mM F6P (i.e. G6P/F6P = 3.5, the experimental equilibrium ratio) the rate was independent of TPS activator and equal to that at 9 mM G6P with TPS activator. Previous investigations [Londesborough & Vuorio (1991) loc. cit. ] had to use crude preparations of intact trehalose synthase because pure intact trehalose synthase was not available. Although the effectiveness of TPS activator preparations was reported to vary between different enzyme preparations, under certain circumstances data were obtained that suggested TPS activator might interact stoichiometrically with native trehalose synthase [Londesborough & Vuorio (1991) loc. cit.]. The present findings show that this suggestion was completely incorrect. The findings also imply that kinetic dat in the literature are confused, because some preparations of so-called "trehalose-6-phosphate synthase" will have contained PGI whereas some may not. With the former preparations, the activator F6P will have been generated from the substrate G6P, but the amount so generated will have depended upon the detail of the experimental procedure used. Example 12. The different kinetic behaviours of intact and truncated trehalose synthase Truncated trehalose synthase was prepared as described by Londesborough & Vuorio [(1991) loc. cit.] and contained the 57 kDa short chain and 86 and 93 kDa fragments of the long chain. Intact trehalose synthase was prepared as in Example 1. Kineti assays were done at 30 °C as described in General Methods and Materials. (a) The TPS Partial Activity Table 8. Inhibition of the TPS activities of intact and truncated enzyme bv phosphate at 5 mM F6P The effect of adding K phosphate pH 6.8 to standard assay mixtures (10 mM G6P, 5 mM UDPG and 5 mM F6P) is shown. For each enzyme, the activity without phosphate is set at 100 %. Added Phosphate Intact Enzyme Truncated Enzyme None 100 % 100 % 1.3 mM 69 % 94 % 4.0 mM 14 83 The TPS activity of intact enzyme was much more sensitive to inhibition by phosphate than was that of the truncated enzyme (Table 8) . The results in Table 8 underestimate the difference between the phosphate responses of intact and truncated enzyme, because F6P partially reverses the phosphate inhibition of intact enzyme (see below) but has virtually no effect on truncated enzyme. Table 9 shows the effect of shifting from the salt conditions of the standard assay (40 mM HEPES/KOH pH 6.8, 10 mM MgCl-) to conditions closer to those of yeast cytosol. In the absence of F6P, the shift caused 67 % inhibition of intact enyzme (from 43 % to 14 % of the standard activity) but only 10 % inhibition of truncated enzyme (from 96 % to 86 %) . Table 9. Effect on the TPS activity of intact and truncated enzyme of shifting to more physiological salt conditions For measurements at "physiological conditions", 1.3 mM K phosphate and 0.1 M KCl were added to the standard assay mixtures and the MgCl- was decreased from 10 to 2.5 mM. These results disclose the insensitivity of the TPS activity o truncated trehalose synthase to physiological phosphate concentrations and the presence or absence of F6P at a concentration well above the normal value in yeast cytosol (between 0.1 and 1 mM; LagUnas, R. & Gancedo, C. (1983) European Journal of Biochemistry 137, 479-483) . Fig. 16 illustrates the F6P-dependence of the TPS activity of intact enzyme at different phosphate concentrations. Double- reciprocal plots of these data (not shown) indicate that at 1. mM phosphate, and perhaps at 4 mM phosphate, sufficiently high concentrations of F6P completely overcome the inhibition by phosphate. With no added phosphate, F6P caused a maximum activation of 2.5-fold, with a K, /2 of 60 μM. At 1.3 mM phosphate, the maximum activation was at least 20-fold, and th K, /2 was 1.4 mM F6P. The slopes of these double-reciprocal plots varied linearly with the square of the phosphate concentration suggesting that two phosphate binding sites are involved. At 4 mM phosphate, which is still within the probable range of phosphate concentrations in yeast cytosol [Lagunas & Gancedo (1983) loc. cit], inhibition was so severe that even 10 mM F6P permitted only 40 % of the activity observed under standard conditions. Thus, expression of a truncated trehalose synthase in yeast would be expected to cause a large increase in the intracellular specific activity of the enzyme. Fructose-1-phosphate, fructose-i,6-bisphosphate, fructose-2,6- bisphosphate and glucose-1-phosphate were tested at sub-optima F6P concentrations (1 mM F6P at 1.3 mM phosphate). None caused activation at 5 or 2.5 M concentrations; instead inhibitions of about 25 % occurred, probably due to competition with G6P and F6P. (b) The TPP Partial Activity. At phosphate concentrations equal to or less than 1 mM, the progress curves of TPP reactions catalysed by truncated trehalose synthase accelerated markedly over at least the first 10 min of reaction. This did not happen with intact enzyme. For the initial rates of reaction, intact enzyme was activated by smaller phosphate concentrations than was truncated enzyme (Fig. 17) . For truncated enzyme, double-reciprocal plots of the activation (VΔ = the rate with phosphate, v -, minus the rate without phosphate, v 0 ) were linear when 1/VΔ was plotted against 1/[phosphate] , with a K Ii of 3 mM phosphate. For intact enzyme these plots were non-linear, and linear plots resulted when 1/[phosphate] 2 was used (Fig. 18). This, again, suggests that intact enzyme has two strong phosphate binding sites, one of which is lost in the truncated enzyme. For intact enzyme, half maximal activation was obtained at 0.6 mM phosphate. In the absence of phosphate, F6P did not affect the TPP activity of intact enzyme. At sub-optimal phosphate concentrations, 5 mM F6P caused modest (20 to 30 %) inhibitions of the TPP activity of both intact and truncated enzymes, and at saturating phosphate concentrations, smaller inhibitions (10 to 15 %) were observed (data not shown) . These findings disclose a profound sensitivity of the TPS activity of intact trehalose synthase to physiological phosphate and F6P concentrations that is lost by truncation of the 123 kDa long chain to about 85 kDa. The effects of truncation are less marked on the TPP activities, both enzymes being activated by physiological phosphate concentrations, and neither showing a strong response to F6P. The data suggest that intact enzyme has two strong phosphate binding sites, one of which is located in the region of the 123 kDa long chain removed by truncation. The finding that the 123 kDa long chain could not be recovered from phosphocellulose, disclosed in Example 9 supports this conclusion. Example 13 Expression of TPS activity in Escherichia coli cell transformed with TSSl and TSLl E.coli. strain HB101 (ALKO 683) was transformed with the plasmids pALK752 and pALK754 consisting of pBluescript containing TSSl and TSLl, respectively (see Example 14 and Fig 20a and 20c) . Transformants ALK03566 and ALK03568 containing, respectively, pALK752 and pALK754 were selected and maintained by growth in the presence of 50 μg/ml of a picillin. Shake flasks containing Luria Broth with no ampicillin (ALKO 683) or 15 μg/ml ampicillin (ALK03566 and ALK03568) were inoculated with 1 ml of a suspension (A600 = 1.5) of the appropriate cell and shaken at 250 rpm and 30 °C for 15 h. Cells were harvested (5 min and 3000g) , washed twice with water, suspended (1.5 g cells/3.7 ml) in HBMED containing 1 mM PMSF and 10 μg/ml pepstatin A, and broken by two passes through a French press (Aminco) -at 15 000 psi. Samples of the homogenates were centrifuged 20 min at 28 OOOg. Homogenates and supernatants were assayed for TPS and TPP at once and the protein contents of the supernatants were determined (Table 10) . Table 10.Expression of TPS activity in E. coli transformed wit TSSl and TSLl. Host (ALKO 6.83) and transformants (ALK03566 containing TSSl an ALK03568 containing TSLl) were grown, harvested and broken as described in the text. Cell homogenates and supernatants were assayed at once for TPS, using the standard assay and a blank assay from which G6P and F6P were omitted, and for TPP. Activities are shown as mU/g fresh cells unless stated otherwise. Standard and blank TPS assays both showed accelerating progress curves and results in Table 10 are mean ± range of 5 min and 10 min assays, which were handled separately to calculate-the net TPS activity. Essentially all of the standard TPS activity measured in the host cells and about half of that in ALK03568 cells was due to a blank reaction (presumably a- phospho- diesterase) generating UDP from UDPG in the absence of G6P and F6P. The net TPS activity of host cells grown under these conditions was close to zero, whereas cells transformed with TSSl or TSLl contained 840 or 140 mU/g fresh cells, most of which (64 % and 71 %, respectively) was soluble. Compared to the host preparation, the specific activities of the net TPS in the 28 000 g supernatants were increased about 50-fold (ALK03566) and 10-fold (ALK03568) . There are probably two reasons for the very low TPS activity of the host cells: trehalose-6-phosphate synthase of E. coli is induced by high osmotic strength, and although some strains also acquire activity in stationary phase, the enzyme activity itself is strongly activated by higher (0.25 M) cation concentrations than in our assay conditions [Giaever et al (1988) Journal of Bacteriology 170, 2841-2849]. No significant change in the TPP activities was observed. Hos cells already contained 1100 mU/g of TPP measured in 25 mM phosphate (and more than 5 U/g measured in 25 mM Hepes buffer) If transformation with the plasmids would have generated TPP activity with a TPP/TPS ratio the same as in pure trehalose synthase from yeast, then the increments in TPP (about 250 an 40 mϋ/g for ALK03566 and ALK03568, repectively) would have be undetectable for ALK03568 and close to the experimental error for ALK03566. Western analyses (Fig. 19) showed that ALK03566 specifically expressed a 57 kDa band recognized by anti-57K serum and more weakly reacting bands with smaller molecular masses. ALK03568 specifically expressed bands recognized by anti-93K serum at about 60, 36 and 35 kDa (strong), suggesting that extensive degradation of the long chain occurs in ALK03568 or 'that TSLl is not correctly transcribed and translated. These results disclose (1) TPS activity can be transferred to heterologous cells by either TSSl or TSLl, (2) a TSSl gene product has TPS activity and (3) also one or more (degraded) products of TSLl has TPS activity. This latter finding is unexpected, because yeast containing a defective (Example 7) o disrupted (Example 14) TSSl gene lack TPS activity. Possibly ALK03568 accumulates fortuitously degraded proteolytic product of the 123 kDa long chain of trehalose synthase that exhibit TPS activity even in the absence of the TSSl product. Obviously, transformation with TSSl (or TSLl) alone can be us to introduce a trehalose synthetic pathway to an organism, suc as E. coli HB101, that already has the capacity to generate trehalose from trehalose-6-phosphate, possibly via a non¬ specific phosphatase. Example 14. Transformation of Yeast (1) Assembly of complete genes and truncated versions of TSLl. Plasmids comprising the complete ORFs of TSSl and TSLl and a truncated ORF of TSLl were assembled from appropriate immunopositive clones of the Haelll and EcoRI libraries used in Examples 4 and 5 to sequence these genes: (a) The TSSl gene with its promoter (pALK 752) A 516 bp fragment was cut from Haelll clone 7 with restriction enzymes Dral and BstEII (see Fig 6 for restriction sites). The Dral site marks the beginning of the disclosed TSSl sequence. This fragment was joined to Haelll clone 20 after this had been digested with BstEII and Clal (the Clal site was in the polylinker) and the Clal end filled with Klenow fragment. The sequence at the junction at the BstEII site in the religated plasmid (shown in Fig 20a) was confirmed by sequencing. (b) The TSSl gene without its promoter (PALK753) Haelll clone 21 was cut with the restriction enzyme Tthllll. To this site the following linker (SEQ ID NO:84, synthesized with the ABI DNA Synthesizer) was added: 5'-CGGGAAGACA TAGAACTATG ACTACGGATA ACGCTAAGGC GCAACTGACC -3' 3'-GCCCTTCTGT ATCTTGATAC TGATGCCTAT TGCGATTCCG CGTTGACTGG -5' This includes nucleotides -13 to +33 of TSSl (see Fig. 4) but, when correctly orientated, introduces a Smal site at nucleotide -16 from the ATG start site. The plasmid (shown in Fig 20b) can be used to release with Smal the ORF of the TSSl gene and about 200 bp of its terminator for further constructions (e.g. expression vectors containing a new promoter) . (c) The TSLl gene with its promoter (PALK754) EcoRI clone 10 was cut with the restriction enzymes Mlul and Ndel, and the resulting 4.4 kb fragment was religated into the pBluescript Smal site. This procedure destroyed all these sites, so that these restriction enzymes cannot be used in further manipulations. The plasmid is shown in Fig 20c. (d) The TSLl gene without its promoter (pALK757) Primers for the polymerase chain reaction (PCR) were made against the beginning of the TSLl gene and the sequence at +318. PCR (Techne PHC-2 Heat/Cool Dri-Block R ) was used to synthesize (at 55 °C) a 325 bp fragment, which had at one end Spel site and close to the other end a BsmI site. This fragmen was digested with BsmI and can be ligated to pALK754 after cutting the latter with Spel (at the site in the pBluescript polylinker) and BsmI and filling the Spel site with Klenow fragment. For further manipulations, the gene can be isolated by cutting the resulting plasmid with Spel and, for example, Clal. (e) A truncated TSLl gene A truncated version of TSLl can be made by cutting pALK754 wit StuI and joining the following linker (SEQ ID NO:85) to this site: 5'-GGGCCCAACA ACACAATGGT TACCCCGAAA TCGAGGGCGG GCAACAGG -3' 3'-CCCGGGTTGT TGTGTTACCA ATGGGGCTTT AGCTCCCGCC CGTTGTCC -5' The linker recreates the StuI site and creates a new ATG start codon at +627 in frame with the coding sequence. Thus, this version of the gene encodes a truncated 123 kDa long chain lacking the first 209 amino acids. It. was disclosed in Example 10 that removal of the first 325 or so amino acids proceeds without loss of catalytic activity, but releases trehalose synthase from strong inhibition by phosphate and the requirement for F6P. Hence, this construction can encode a truncated 123 kDa polypeptide leading to a trehalose synthase with increased activity at physiological phosphate and F6P concentrations. A new Smal site is included in the linker. The sequence flanking the new ATG on the 5'-side resembles the original ATG flanking sequence and the surrounding nucleotides are in accordance with the sequences known to occur most frequently at positions -7 to +4. (2 ) Disruption mutants. The TSSl gene was disrupted to confirm that it is an essential gene in trehalose synthesis. The one-step gene disruption method [Rothstein, R.J. (1983) Methods in Enzymology 101, 202- 211)] was used as. follows: Plasmid pA*LK752 was- cut with Xcml. A blunted Sall-Xhol fragment containing the LEU2 gene from plasmid yEpl3 [Broach, J et al (1979) Gene 8, 121-133] was ligated to the blunted Xcml site. The resulting plasmid was cut with Nsil and Pvul and the reaction mixture was run through a 0.8% low-melting point agarose gel. A band of 4 kb was excised from the gel and purified. S. cerevisiae strain S150-2B was transformed (using the one-step alkali-cation method of Chen et al [(1992) Current Genetics 21, 83-84]) with the 4 kb DNA fragment containing the TSSl gene interrupted by the LEU2 gene. Leu + transformants were selected on minimal plates lacking leucine and containing glucose or galactose, and the clones obtained were then grown on YPD or YP/2% galactose, respectively. As expected the phenotype of the disruptants resembled the fdpl and cifl phenotypes (see Example 2) . Only one transformant (ALK03569) was isolated on glucose and the several transformants isolated on galactose were unable to grow on glucose. The glucose transformant and the tested galactose transformant (ALKO3570) did not accumulate trehalose in stationary phase (<0.2 % of dry wt.), lacked TPS and had low TPP activity (< 10 % of wild type) . The 57 kDa band could not be seen on Western blots. Southern analysis (Fig 21) showed that the TSSl gene had been disrupted by a LEU2 gene, but the TSLl gene was intact. Another mutant, WDC-3A (see Table 1) with a disrupted TSSl gen was obtained from the laboratory of Dr. C. Gancedo (Instituto de Investigaciones Biomedicas, CSIC, Madrid, Spain) as a cifl::HIS3 disruptant. This mutant was easier to transform tha were the tssl::LEU2 disruptants, and so it was used to confirm that the TSSl gene on a plasmid can confer TPS and TPP activities, trehalose accumulation and improved stress resistance. WDC-3A was transformed with the plasmid pMB4 (see Table 1; the plasmid contains an intact CIFl ≡ TSSl gene and a selectable URA3 marker) and transformants selected in the absence of uracil. Western analyses (not shown) indicated that the transformants has acquired the 57 kDa band absent from WDC 3A. The parent and a transformant were grown in parallel in minimal medium containing 2 % galactose and (transformant) no uracil or (parent) uracil. Duplicate cultures of each strain were harvested in early stationary phase after 28 h growth samples taken for studies of stress resistance ' , and the rest used for trehalose and enzyme assays (Table 11) . Table 11. Analysis of WDC-3A and its PMB14 transformant. Duplicate cultures were analyzed separately for trehalose and combined for enzyme assays. TPS activities were corrected for UDPGase activity in the absence of G6P and F6P. Cell mass (g/100 ml medium) Trehalose (% of dry wt.) Whole homogenates TPP (U/g fresh yeast) TPS (U/g fresh yeast) 28,000 g supernatants TPP (U/g fresh yeast) TPS (U/G fresh yeast) TPS (mU/mg protein) These results disclose that introduction of TSSl on a plasmid can restore both TPS and TPP activities and increase the trehalose content of an organism. The TPP/TPS ratio (5 %) is much lower than that (about 35 %) of purified trehalose synthase whereas the baker' yeast used in Example 1 and the X2180 used in Example 2 both have TPP/TPS ratios in their homogenates close to that of pure enzyme. This suggests that transformation with TSSl in pMB14 increases TPP only up to a limit set by the genetic background of the host (probably the amounts of 99 and 123 kDa polypeptides present) but causes a larger increase in TPS due to activity associated also with 57 kDa chains not incorporated into the trehalose synthase complex. Samples of the transformant and host were frozen in water at 1 μg yeast/ml and kept for 5 days at -20 °C. The Viability was then tested on plates containing YP/2 % galactose. After freezing stress, 1.0 ± 0.1 % of the transformants and < 0.05 % of the host cells were viable. These results disclose that transformation of an organism with TSSl can increase its resistance to freezing-stress. (3) Strategies for transformation. Laboratory strains of S. cerevisiae bearing auxotrophic marker such as his3, leu2, lys 2, trpl and ura3 can be easily transformed with the trehalose synthase genes by essentially the same methjods described for transformation of tssl disruptants with TSSl. Versions of the genes in which the natural promoters and terminators are intact or have been replaced by (stronger and regulatable) promoters and terminators from other yeast genes can be used. For example, PGKI [pMA91; Mellor et al (1983) Gene 24, 1-14], ADC1 [pAAH5; Ammerer (1983) Methods in Enzymology 101, 192-201] and MEL1 [pALK3537, pALK41, etc., Suominen, P.L. (1988) Doctoral dissertation. University of Helsinki] systems have been used t increase the expression levels of genes in S. cerevisiae and other yeast. The MEL1 system has the advantage that the expression can be regulated, being repressed by glucose and ' induced by galactose. Standard vectors are available [episomal and integrating and centromere yeast plasmids are reviewed by Rose & Broach (1990) Methods in Enzymology 185, 234-279 and Stearns, T. , Ma, H & Botstein, D. (1990) Methods in Enzymology 185, 280-291] that incorporate auxotrophic markers such as HIS3, LEU2, TRP1 and URA3, which can be used to select the transformants. Vectors based on these principles, but suited to a particular task can be constructed by a person familiar with the art. The basic strategy is to leave the yeast with an intact versio of its natural genes for trehalose synthase and introduce, either on episomes or integrated into a yeast chromosome, extr copies of the genes. These may be under control of their own promoters, or of stronger promoters and promoters that can be regulated, for example by adding substances such as galactose to the growth medium or by changing the temperature. The use o such promoters has been described [see, e.g., Mylin et al. (1990) Methods in Enzymology 185, 297-308; Sledziewski et al. (1990) Methods in Enzymology 185, 351-366]. This strategy avoids problems that can be foreseen if all copies of the genes genes are put under tight control (such as the defects in sugar catabolism expected if TSSl is not properly expressed; see Example 7.) Transformed yeast bearing additional copies of the genes with their natural promoters may accumulate enough trehalose to exhibit the desired improvement in stability. They may also cycle enough glucose units through trehalose during fermentative conditions to generate an ATPase that accelerates fermentation and increases the yield of ethanol on glucose. Alternatively, the promoters of one or more genes can be changed to promoters that are more active under fermentative conditions. In another aspect of the invention, copies of the ORFs of the genes can be inserted into expression vectors equipped with powerful promoters (that may be regulatable) to cause still larger increases in trehalose. This can be particularly useful for the production of trehalose. Transforming yeast with two or all three genes can be achieved in several ways. The most obvious procedure is to use different auxotrophic markers and introduce the genes sequentially. Another method is to construct a Yip containing URA3 and a modified version of, say, TSLl with a stronger promoter but still containing a region of homology upstream of this promoter. After directed integration of this plasmid to the chromosomal ura3 site and selection of URA+ transformants, mutants in which the URA3 has again been excised (with a frequency of about 1 x 10 "4 ) can be selected by growth on media containing 5-fluoroorotic acid [see Stearns et al. (1990) loc. cit.] . Some of the selected cells would contain a new version of the gene, with the stronger promoter and can again be transformed, this time with, say, a modified TSSl gene. The resultant transformants will contain one copy of TSLl driven by the new promoter, and two copies of TSSl, one of which is still under the control of its natural promoter. Thirdly, a Yip containing two or all three genes can be used to introduce the genes in a single step. Various methods to transform industrial, polyploid yeast, whic lack auxotrophic markers have been described in the literature Earlier methods have been reviewed by Knowles, J.K.C. & Tubb, R.S. [(1987) E.B.C. symposium on brewer's yeast, Helsinki, 1986. Monograph XII 169-185] and include the use of marker genes that confer resistance to antibiotics, methylglyoxal, copper, cinnamic acid and other compounds. These markers facilitate selection of transformants. Some of the marker gene are themselves of yeast origin, and so are preferred for acceptability reasons. When suitable modifications and combinations of the genes have been identified by using laboratory yeast, they may be transferred to industrial yeast using these procedures or others described in the literature, such as co-transformation with pALK2 and pALK7 [Suominen, P. I. (1988) loc. cit.].. These plasmids contain a readily selectable MEL1 marker gene on a 2 μ-based plasmid that can readily be cured, thus facilitating sequential transformation with more than one gene if it is not practicable to introduce the modified genes in one step using this co-transformation procedure. Example 15. Transformation of crop plants. Methods for the transformation of higher plants, including cro plants of economic importance, have been described [Goodman et al (1987) Science 236, 48-54; Weising et al, (1988) Annual Review of Genetics 22, 421-477; Glasser & Fraley (1989) Scienc 244, 1293-1299; Lindsey, K. (1992) Journal of Biotechnology 26, 1 - 28] and laboratory manuals setting, out standard procedures are available such as the Plant Molecular Biology Manual [ed. Gelvin & Schnilperoort (1988) Kluwer Academic Press] . Of particular utility is the use of tissue specific promoters fro the genes of proteins that are expressed in a highly tissue-specific manner [see, e.g., Higgins (1984) Annual Revie of Plant Physiology 35, 191 et seg. ; Shotwell and Larkins (1989) in The Biochemistry of Plants 15, 297 et seg. ] . The use of such promoters will allow the expression of trehalose synthase in (a) specifically the frost- and drought-sensitive tissues of plants so that they may be protected from these and equivalent stresses without diverting carbohydrate metabolism in the major storage tissues, or alternatively (b) precisely in the edible tissues. The purpose of this second alternative is to cause the accumulation of trehalose in products such as the fruit of tomatoes, in order to increase the shelf-life of these products. The expression of non-plant genes, with higher A+T contents than are commonly found in plant genes can generally be improved by changing the codons to increase the G+C content, and in particular to avoid regions of overall high A+T content Perlak et al. (1991) loc. cit.]. It is foreseen that such modifications will be beneficial in the case of the genes TSSl and TSLl, which have A+T-rich regions. Selection systems are available for use in the transformation of higher plants, including plasmids comprising the gene (hpt) for hygromycin phosphotransferase [Dale & Ow (1991) Proceedings of the National Academy of Sciences, USA 88, 1055810562]. These and similar methods familiar to persons skilled in the art can be used, first to introduce various modifications of the yeast trehalose synthase genes into Arabidopsis thaliana, and then to transfer the most successful modifications to plants of economic importance. One example of how one.would transform a crop plant (dicots and some monocots) is via a Ti plasmid. A large fragment of the Ti plasmid encompassing both the T-DNA and vir regions is first cloned into the common bacterial plasmid pBR322. One or more of the trehalose synthase genes are then cloned into a non- essential region of the T-DNA and introduced into Agrobacterium tumefaciens carrying an intact Ti plasmid. The plants are then infected with these bacteria and the gene products of the vir region on the intact Ti plasmid mobilize the recombinant T-DNA, and the recombinant T-DNA integrates into the plant geome. One or more of the trehalose synthase genes can be introduced into the plant in this manner, by inserting the genes into either the same plasmid or separate plasmids. SEQUENCE LISTING (1) GENERAL INFORMATION (i) APPLICANT: (A) NAME: ALKO LTD. (et al.) (B) STREET: Sal isaarenranta 7 (C) CITY: Helsinki (D) COUNTRY : FINLAND (E) POSTAL CODE: SF-00100 (ii) TITLE OF INVENTION: Increasing the trehalose content of organisms by transforming them with combinations of the structural genes for trehalose synthase. (iii) NUMBER OF SEQUENCES: 85 (iv) PRIOR APPLICATION DATA: (A)APPLICATION NUMBER: US / 07/836,021 (B)FILING DATE: 14 February 1992 (A)APPLICATION NUMBER: US / 07/841,997 (B)FILING DATE: 28 February 1992 (2) INFORMATION FOR SEQ ID NO:l: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 2481 base pairs (B) TYPE: Nucleotide (C) STRANDEDNESS: Doublestranded (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Genomic DNA (iii) HYPOTHETICAL: no (iv) ANTI-SENSE: no (vi) ORIGINAL SOURCE: (A) ORGANISM: Saccharomyces cerevisiae (B) STRAIN: S288C (E) HAPLOTYPE: Haploid (vii) IMMEDIATE SOURCE (A) LIBRARY: Genomic (B) CLONE: 20 (viϋ) POSITION IN GENOME: (A) CHROMOSOME: 2R (Xi) SEQUENCE DESCRIPTION: SEQ ID NO:l TTTTTAAACG TATATAGATG TCTACATGTG TGTTTTTGTT 5 CGTATACCCA CCTATATATG CATAATCCGT AATTGAAAAA AAGATCAAGG AACACATCAC CCTGGGCACA TCAAGCGTGA CCAACTGGTG GAGACGCTTG ATTTGCTCTT TTTGTTCCTG GGTCTCGAAG AACATCAGCA CCACGCCCGC AACGACAAAG TACACTTGCA TATGTGAGCA TAGTCGAGCG GTCCGTTCTG 10 TGTTGTTCTT TCTTCTGTTT GTCAGGGGTG ATAGCCATAT TTGTTGCGAT TGTTCTGTTC CATCTGCACC AGAACAAAGA AAGGAACAAA GTCCAAGCAC GTCAGCGCTG TTTATAAGGG GGATCGGGCC TAGAGTGCCA GCGCGCCAGG GAGAGGGAGC CTCATCCGCA GGCTGATAGG GGTCACCCCG CTGGGCAGGT 15 GCTCTCAGGG GGGCGCCATG GACAAACTGC ACTGAGGTTC GTATTATTGT GAGTATGTAT ATATAGAGAG AGATTAAGGC GTGGTAGAGA TTGATTAACT TGGTAGTCTT ATCTTGTCAA GTCAGTTTCT TCTTGAACAA GCACGCAGCT AAGTAAGCAA TAACAAACTA GGTACTCACA TACAGACTTA TTAAGACATA 20 TACGGATAAC GCTAAGGCGC AACTGACCTC GTCTTCAGGG TTGTGGTGTC CAACAGGCTT CCCGTGACAA TCACTAAAAA GGACAGTACG AGTACGCAAT GTCGTCCGGA GGGCTGGTCA AGGGTTGAAG AAGACGTACA CTTTCAAGTG GTTCGGATGG AGATTCCTGA CGATGAGAAG GATCAGGTGA GGAAGGACTT 25. TTTAATGCCG TACCCATCTT CCTGAGCGAT GAAATCGCAG CAACGGGTTC AGTAATTCTA TTCTATGGCC GTTATTCCAT GTGAGATCAA TTTCGACGAG AATGCGTGGT TCGGATACAA CAGACGTTCA CCAACGAGAT TGCTAAGACT ATGAACCATA CTGGGTGCAT GATTACCATT TGATGTTGGT TCCGGAAATG 30 AGATTCACGA GAAGCAACTG CAAAACGTTA AGGTCGGGTG ACACCATTCC CTTCGAGTGA AATTTACAGA ATCTTACCTG GATTTTGAAG GGTGTTTTGA GTTGTGATTT AGTCGGGTTC ATTATGCAAG ACATTTCTTG TCTTCCGTGC AAAGAGTGCT ACATTGCCTA ATGGGGTGGA ATACCAGGGC AGATTCGTTA 35 CTTCCCTATC GGTATCGACG TGGACAAGTT CACCGATGGG AATCCGTACA AAAGAGAATC CAACAATTGA AGGAAACTTT AAGATCATAG TTGGTGTCGA CAGGCTGGAT TACATCAAAG GAAGTTGCAC GCCATGGAAG TGTTTCTGAA CGAGCATCCA GCAAGGTTGT TCTGGTACAG GTTGCAGTGC CAAGTCGTGG 40 GAGTACCAAT ATTTAAGATC TGTGGTCAAT GAGTTGGTCG CGGTCAGTTC GGTACTGTGG AATTCGTCCC CATCCATTTC . CTATACCATT TGAAGAGCTG ATTTCGTTAT ATGCTGTGAG TTGGTCTCGT CCACCCGTGA TGGTATGAAC TTGGTTTCCT TGCTTGCCAA GAAGAAAAGA AAGGTTCCTT AATCCTGAGT 45 GTGCCGCACA ATCCTTGAAT GGTGCTATTA TTGTAAATCC GATGATCTTT CTGATGCCAT CAACGAGGCC TTGACTTTGC GAAAGAAGTT AACTGGGAAA AACTTTACAA ATACATCTCT CTGCCTTCTG GGGTGAAAAT TTCGTCCATG AATTATACAG AGCTCAACAA GCTCCTCTGC CACCAAAAAC TGATGAACCC 0 ' AGACGATCGT CTATTCCTGG TCCGGTTTTC TCTGCCCTCT CTTTTTTTAT ACTTTATATA AAATTATATA AATGACATAA ACACGTCCTC TCCTATTCGT TAACGCCTGT CTGTAGCGCT CTGCGCAAGT AGTTTTTTCA CCGTATAGGC C 5 (3)INFORMATION FOR SEQ ID NO:2 (i) SEQUENCE CHARACTERISTICS (A) LENGTH: 495 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULAR TYPE: Polypeptide (iii) HYPOTHETICAL: Yes (xi) SEQUENCE DESCRIPTION:SEQ ID NO:2 Met Thr Thr Asp Asn Ala Lys Ala Gin Leu Thr Ser Ser Ser Gly 5 10 15 Gly Asn lie lie Val Val Ser Asn Arg Leu Pro Val Thr lie Thr - 20 25 30 Lys Asn Ser Ser Thr Gly Gin Tyr Glu Tyr Ala Met Ser Ser Gly 35 40 45 Gly Leu Val Thr Ala Leu Glu Gly Leu Lys Lys Thr Tyr Thr Phe 50 55 60 Lys Trp Phe Gly Trp Pro Gly Leu Glu lie Pro Asp Asp Glu Lys 65 70 75 Asp Gin Val Arg Lys Asp Leu Leu Glu Lys Phe Asn Ala Val Pro 80 85 90 lie Phe Leu Ser Asp Glu lie Ala Asp Leu His Tyr Asn Gly Phe 95 100 105 ' Ser Asn Ser lie Leu Trp Pro Leu Phe His Tyr His Pro Gly Glu 110 115 120 lie Asn Phe Asp Glu Asn Ala Trp Phe Gly Tyr Asn Glu Ala Asn 125 130 135 Gin Thr Phe Thr Asn Glu lie Ala Lys Thr Met Asn His Asn Asp 140 145 150 Leu lie Trp Val His Asp Tyr His Leu Met Leu Val Pro Glu Met 155 160 165 Leu Arg Val Lys lie His Glu Lys Gin Leu Gin Asn Val Lys Val 170 175 180 Gly Trp Phe Leu His Thr Pro Phe Pro Ser Ser Glu lie Tyr Arg 185 190 195 lie Leu Pro Val Arg Gin Glu lie Leu Lys Gly Val Leu Ser Cys 200 205 210 Asp Leu Val Gly Phe His Thr Tyr Asp Tyr Ala Arg His Phe Leu 215 220 225 Ser Ser Val Gin Arg Val Leu Asn Val Asn Thr Leu Pro Asn Gly 230 235 240 Val Glu Tyr Gin Gly Arg Phe Val Asn Val Gly Ala Phe Pro lie 245 250 255 Gly lie Asp Val Asp Lys Phe Thr Asp Gly Leu Lys Lys Glu Ser 260 265 270 Val Gin Lys Arg lie Gin Gin Leu Lys Glu Thr Phe Lys Gly Cys 275 280 285 Lys lie lie Val Gly Val Asp Arg Leu Asp Tyr lie Lys Gly Val 290 295 300 Pro Gin Lys Leu His Ala Met Glu Val Phe Leu Asn Glu His Pro 305 310 315 (4)INFORMATION FOR SEQ ID NO:3 (i) SEQUENCE CHARACTERISTICS (A) LENGTH: 3000 base pairs (B) TYPE: Nucleotide (C) STRANDEDNESS: Doublestranded (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Genomic DNA (iii) HYPOTHETICAL: No (iv) ANTI-SENSE: No (vi) ORIGINAL SOURCE: (A) ORGANISM: Saccharomyces cerevisiae (B) STRAIN: S288C (E) HAPLOTYPE: Haploid (Vii) IMMEDIATE SOURCE: (A) LIBRAR : Genomic (B) CLONE: 6 (Vii) POSITION IN GENOME (A) CHROMOSOME: 13 (Xi) SEQUENCE DESCRIPTION: SEQ ID NO:3 CCTCCTCTGG ATCTTCTGGG TCTTCTGCGC CACCTTCCAT TAAAAGGATT 50 ACGCCCCACT TGACTGCGTC TGCTGCAAAA CAGCGTCCCT TATTGGCTAA 100 ACAGCCTTCT AATCTGAAAT ATTCGGAGTT AGCAGATATT TCGTCGAGTG 150 AGACGTCTTC GCAGCATAAT GAGTCGGACC CGGATGATCT AACTACTGCC 200 CTGACGAGGA TATGTTTCTG ATTAGGAATT GATGACGCGA GAGGACTACA 250 AGGTTCAAAG TTCGGCGCTA TTCATAAATC AACTAAGAAA TATGCGCTGT 300 TAAGGTCATC TCAGGAGCTG TTTAGCCGTC TTCCATGGTC GATCGTTCCC 350 TCTATCAAAG GTAATGGCGC CATGAAGAAC GCCATAAACA CTGCAGTCTT 400 GGAGAATATC ATTCCGCACC GTCATGTTAA GTGGGTCGGT ACCGTCGGAA 450 TCCCAACGGA TGAGATTCCG GAAAATATCC TTGCGAACAT CTCTGACTCT 500 TTAAAAGACA AGTACGACTC CTATCCTGTC CTTACGGACG ACGACACCTT 550 CAAAGCCGCA TACAAAAACT ACTGTAAACA AATCTTGTGG CCTACGCTGC 600 ATTACCAGAT TCCAGACAAT CCGAACTCGA AGGCTTTTGA AGATCACTCT 650 TGGAAGTTCT ATAGAAACTT AAACCAAAGG TTTGCGGACG CGATCGTTAA 700 AATCTATAAG AAAGGTGACA CCATCTGGAT TCATGATTAC CATTTAATGC 750 TGGTTCCGCA GATGGTGAGA GACGTCTTGC CTTTTGCCAA AATAGGATTT 800 ACCTTACATG TCTCGTTCCC CAGTAGTGAA GTGTTTAGGT GTCTGGCTCA 850 GCGTGAGAAG ATCTTAGAAG GCTTGACCGG TGCAGACTTT GTCGGCTTCC 900 AGACGAGGGA GTATGCAAGA CATTTCTTAC AGACGTCTAA CCGTCTGCTA 950 ATGGCGGACG TGGTACATGA TGAAGAGCTA AAGTATAACG GCAGAGTCGT 1000 TTCTGTGAGG TTCACCCCAG TTGGTATCGA CGCCTTTGAT TTGCAATCGC 1050 AATTGAAGGA TGGAAGTGTC ATGCAATGGC GTCAATTGAT TCGTGAAAGA 1100 TGGCAAGGGA AAAAACTAAT TGTGTGTCGT GATCAATTCG ATAGAATTAG 1150 AGGTATTCAC AAGAAATTGT TGGCTTATGA AAAATTCTTG GTCGAAAATC 1200 CGGAATACGT GGAAAAATCG ACTTTAATTC AAATCTGTAT TGGAAGCAGT 1250 AAGGATGTAG AACTGGAGCG CCAGATCATG ATTGTCGTGG ATAGAATCAA 1300 CTCGCTATCC ACCAATATTA GTATTTCTCA ACCTGTGGTG TTTTTGCATC 1350 AAGATCTAGA TTTTTCTCAG TATTTAGCTT TGAGTTCAGA GGCAGATTTG 1400 TTCGTAGTCA GCTCTCTAAG GGAAGGTATG AACTTGACAT GTCACGAATT 1450 TATCGTTTGT TCTGAGGACA AAAATGCTCC CCTACTGTTG TCAGAATTTA 1500 CTGGTAGTGC ATCTTTATTG AATGATGGCG CTATAATAAT TAACCCATGG 1550 GATACCAAGA ACTTCTCACA AGCCATTCTC AAGGGGTTGG AGATGCCATT 1600 CGATAAGAGA AGGCCACAGT GGAAGAAATT GATGAAAGAC ATTATCAACA 1650 ACGACTCTAC AAACTGGATC AAGACTTCTT TACAAGATAT TCATATTTCG 1700 TGGCAATTCA ATCAAGAAGG TTCCAAGATC TTCAAATTGA ATACAAAAAC 17_.0 ACTGATGGAA GATTACCAGT CATCTAAAAA GCGTATGTTT GTTTTCAACA 1800 TTGCTGAACC ACCTTCATCG AGAATGATTT CCATACTGAA TGACATGACT 1850 TCTAAGGGCA ATATCGTTTA CATCATGAAC TCATTTCCAA AGCCCATTCT 1900 GGAAAATCTT TACAGTCGTG TGCAAAACAT TGGGTTGATT GCCGAGAATG 1950 GTGCATACGT TAGTCTGAAC GGTGTATGGT ACAACATTGT TGATCAAGTC 2000 GATTGGCGTA ACGATGTAGC CAAAATTCTC GAGGACAAAG TGGAGAGATT 2050 ACCTGGCTCG TACTACAAGA TAAATGAGTC CATGATCAAG TTCCACACTG 2100 AAAATGCGGA AGATCAAGAT CGTGTAGCTA GTGTTATCGG TGATGCCATC 2150 ACACATATCA ATACTGTTTT TGACCACAGA GGTATTCATG CCTACGTTTA 2200 CAAAAACGTT GTTTCCGTAC AACAAGTGGG ACTTTCCTTA TCGGCAGCTC 2250 AATTTCTTTT CAGATTCTAT AATTCTGCTT CGGATCCACT GGATACGAGT 2300 TCCGGCCAAA TCACAAATAT TCAGACACCA TCTCAACAAA ATCCTTCAGA 2350 TCAAGAACAA CAACCTCCAG CCTCTCCCAC TGTGTCGATG AACCATATTG 2400 ATTTCGCATG TGTCTCTGGT TCATCGTCTC CTGTGCTTGA ACCATTGTTC 2450 AAATTGGTCA ATGATGAAGC AAGTGAAGGG CAAGTAAAAG CCGGACACGC 2500 CATTGTTTAT GGTGATGCTA CTTCTACTTA TGCCAAAGAA CATGTAAATG 2550 GGTTAAACGA ACTTTTCACG ATCATTTCAA GAATCATTGA AGATTAAATT 2600 TTACCATTTT AAAATTTTAA TGTTCTTGGG TATGAACTTT TATTTTCAAC 2650 TGCTTATTAT ATATCAATTC TATAAATTTT TTTCTTCTCT CTAACGACCA 2700 ATTATAAAAT TCATCCTCTT ATTTATTACA GCATCTTATA CATTATGTAT 2750 ATGGGTAGCT ATTATTCATT TTTGCTTCGT AAGGACTTTT TTTGTCAACT 2800 TTTTCATCCT AAGCGGCTAA AAGTGATTGG AGAGGAATGT CCAGGCGACC 2850 AATGATAAAA ACGCTTTCTC TTGGAACAAG AAATAGGAGC AATTGACAGT 2900 TGTCGATGAA CAGCGAAAAT AGTAAGATAA CCTTCAAGCC CAATATTCTA 2950 ATTAAAGGCG TTTATATATT TGTACTTTAT GGTATGTGCA TATGTATTGT 3000 (5) INFORMATION FOR SEQ ID NO:4 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 785 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Polypeptide (iii) HYPOTHETICAL: Yes (v) FRAGMENT TYPE: C-terminal ( i) SEQUENCE DESCRIPTION: SEQ ID NO:4 Arg Gly Leu Gin Gly Ser Lys Phe Gly Ala He His Lys Ser Thr 5 10 . 15 Lys Lys Tyr Ala Leu Leu Arg Ser Ser Gin Glu Leu Phe Ser Arg 20 25 30 Leu Pro Trp Ser He Val Pro Ser He Lys Gly Asn Gly Ala Met 35 40 45 Lys Asn Ala He Asn Thr Ala Val Leu Glu Asn He He Pro His 50 ' 55 60 Arg His Val Lys Trp Val Gly Thr Val Gly He Pro Thr Asp Glu 65 70 75 He Pro Glu Asn He Leu Ala Asn He Ser Asp Ser Leu Lys Asp 80 85 90 Lys Tyr Asp Ser Tyr Pro Val Leu Thr Asp Asp Asp Thr Phe Lys 95 100 105 Ala Ala Tyr Lys Asn Tyr Cys Lys Gin He Leu Trp Pro Thr Leu 110 115 120 His Tyr Gin He Pro Asp Asn Pro Asn Ser Lys Ala Phe Glu Asp 125 130 135 His Ser Trp Lys Phe Tyr Arg Asn Leu Asn Gin Arg Phe Ala Asp 140 145 150 Ala He Val Lys He Tyr Lys Lys Gly Asp Thr He Trp He His 155 160 165 Asp Tyr His Leu Met Leu Val Pro Gin Met Val Arg Asp Val Leu 170 175 180 Pro Phe Ala Lys He Gly Phe Thr Leu His Val Ser Phe Pro Ser 185 190 195 Ser Glu Val Phe Arg Cys Leu Ala Gin Arg Glu Lys He Leu Glu 200 205 210 Gly Leu Thr Gly Ala Asp Phe Val Gly Phe Gin Thr Arg Glu Tyr 215 220 225 Ala Arg His Phe Leu Gin Thr Ser Asn Arg Leu Leu Met Ala Asp 230 235 240 Val Val His Asp Glu Glu Leu Lys Tyr Asn Gly Arg Val Val Ser 245 250 255 Val Arg Phe Thr Pro Val Gly He Asp Ala Phe Asp Leu Gin Ser 260 265 270 Gin Leu Lys Asp Gly Ser Val Met Gin Trp Arg Gin Leu He Arg 5 275 280 285 Glu Arg Trp Gin Gly Lys Lys Leu He Val Cys Arg Asp Gin Phe 290 295 300 Asp Arg He Arg Gly He His Lys Lys Leu Leu Ala Tyr Glu Lys 305 310 315 10 Phe Leu Val Glu Asn Pro Glu Tyr Val Glu Lys Ser Thr Leu He 320 325 330 Gin He Cys He Gly Ser Ser Lys Asp Val Glu Leu Glu Arg Gin 335 340 345 He Met He Val Val Asp Arg He Asn Ser Leu Ser Thr Asn He 15 350 355 360 Ser He Ser Gin Pro Val Val Phe Leu His Gin Asp Leu Asp Phe 365 370 375 Ser Gin Tyr Leu Ala Leu Ser Ser Glu Ala Asp Leu Phe Val Val 380 385 390 20 Ser Ser Leu Arg Glu Gly Met Asn Leu Thr Cys His Glu Phe He 395 400 405 Val Cys Ser Glu Asp Lys Asn Ala Pro Leu Leu Leu Ser Glu Phe 410 415 420 Thr Gly Ser Ala Ser Leu Leu Asn Asp Gly Ala He He He Asn 25. '425 4.30 435 ' Pro Trp Asp Thr Lys Asn Phe Ser Gin Ala He Leu Lys Gly Leu 440 445 450 Glu Met Pro Phe Asp Lys Arg Arg Pro Gin Trp Lys Lys Leu Met 455 460 465 30 Lys Asp He He Asn Asn Asp Ser Thr Asn Trp He Lys Thr Ser 470 475 480 Leu Gin Asp He His He Ser Trp Gin Phe Asn Gin Glu Gly Ser 485 490 495 Lys He Phe Lys Leu Asn Thr Lys Thr Leu Met Glu Asp Tyr Gin 35 500 505 510 Ser Ser Lys Lys Arg Met Phe Val Phe Asn He Ala Glu Pro Pro 515 520 525 Ser Ser Arg Met He Ser He Leu Asn Asp Met Thr Ser Lys Gly 530 535 540 40 Asn He Val Tyr He Met Asn Ser Phe Pro Lys Pro He Leu Glu 545 550 555 Asn Leu Tyr Ser Arg Val Gin Asn He Gly Leu He Ala Glu Asn 560 565 570 Gly Ala Tyr Val Ser Leu Asn Gly Val Trp Tyr Asn He Val Asp 5 575 580 585 Gin Val Asp Trp Arg Asn Asp Val Ala Lys He Leu Glu Asp Lys 590 595 600 Val Glu Arg Leu Pro Gly Ser Tyr Tyr Lys He Asn Glu Ser Met 605 610 615 0 ' lie Lys Phe His Thr Glu Asn Ala Glu Asp Gin Asp Arg Val Ala 620 625 630 Ser Val He Gly Asp Ala He Thr His He Asn Thr Val Phe Asp 635 640 645 His Arg Gly He His Ala Tyr Val Tyr Lys Asn Val Val Ser Val 5 650 655 660 Gin Gin Val Gly Leu Ser Leu Ser Ala Ala Gin Phe Leu Phe Arg 665 670 675 Phe Tyr Asn Ser Ala Ser Asp Pro Leu Asp Thr Ser Ser Gly Gin 680 685 690 He Thr Asn He Gin Thr Pro Ser Gin Gin Asn Pro Ser Asp Gin 695 700 705 " Glu Gin Gin Pro Pro Ala Ser Pro Thr Val Ser Met Asn His He 710 715 720 Asp Phe Ala Cys Val Ser Gly Ser Ser Ser Pro Val Leu Glu Pro 725 730 735 Leu Phe Lys Leu Val Asn Asp Glu Ala Ser Glu Gly Gin Val Lys 740 745 750 Ala Gly His Ala He Val Tyr Gly Asp Ala Thr Ser Thr Tyr Ala 755 760 765 Lys Glu His Val Asn Gly Leu Asn Glu Leu Phe Thr He He Ser 770 775 780 Arg He He Glu Asp 785 (6) INFORMATION FOR SEQ ID NO:5 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 4 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:5 Tyr He Ser Lys (7)INFORMATION FOR SEQ ID NO:6 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 9 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION: SEQ ID NO:6 Asp Val Glu Glu Tyr Gin Tyr Leu Arg 5 (8)INFORMATION FOR SEQ ID NO:7 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 8 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:7 His Phe Leu Ser Ser Val Gin Arg 5- (9) INFORMATION FOR SEQ ID NO:8 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 14 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v). SEQUENCE DESCRIPTION: SEQ ID NO:8 Val Leu Asn Val Asn Thr Leu Pro Asn Gly Val Glu Tyr Gin 5 10 (10) INFORMATION FOR SEQ ID NO:9 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 9 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION: SEQ ID NO:9 Ser Val Val Asn Glu Leu Val Gly Arg 5 (11) INFORMATION FOR SEQ ID NO:10 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 4 (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (ϋi) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:10 Glu Thr Phe Lys (12) INFORMATION FOR SEQ ID NO:11 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 5 amino acids (B) TYPE: Amino acid (D)- TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:11 Leu Asp Tyr He Lys 5 (13) INFORMATION FOR SEQ ID NO:12 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 5 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:12 He Leu Pro Val Arg 5 (14) INFORMATION FOR SEQ ID NO:13 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 6 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION: SEQ ID NO:13 Glu Val Asn Xaa Glu Lys 5 (15) INFORMATION FOR SEQ ID NO:14 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 5 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION: SEQ ID NO:14 Phe Tyr Asp Xaa Xaa 5 (16) INFORMATION FOR SEQ ID NO:15 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 13 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION: SEQ ID NO:15 Leu Xaa Ala Met Glu Val Phe Leu Asn Glu Xaa Pro Glu 5 10 (17) INFORMATION FOR SEQ ID NO:16 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 14 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:16 Tyr Thr Ser Ala Phe Trp Gly Glu Asn Phe Val Xaa Glu Leu 5 10 (18) INFORMATION FOR SEQ ID NO:17 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 9 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION: SEQ ID NO:17 Phe Gly Xaa Pro Gly Leu Glu He Pro 5 (19) INFORMATION FOR SEQ ID NO:18 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 6 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:18 Xaa Gly Ser Val Met Gin 5 (20) INFORMATION FOR SEQ ID NO:19 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 7 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:19 Leu Pro Gly Ser Tyr Tyr Lys 5 (21) INFORMATION FOR SEQ ID NO:20 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 12 amino acids (B) TYPE: Amino acid (P) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal . (v) SEQUENCE DESCRIPTION: SEQ ID NO:20 Asp Ala He Val Val Asn Pro Met Asp Ser Val Ala 5 10 (22) INFORMATION FOR SEQ ID NO:21 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 5 amino acids (B)TYPE: Amino acid (D)TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION: SEQ ID NO:21 Met He Ser He Leu 5 (23) INFORMATION FOR SEQ ID NO:22 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 6 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (ϋi) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:22 Arg Arg Pro Gin Trp Lys 5 (24) INFORMATION FOR SEQ ID NO:23 Ji) SEQUENCE CHARACTERISTICS: (A) LENGTH 5 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION: SEQ ID NO:23 Ser Xaa Pro Gin Lys 5 (25) INFORMATION FOR SEQ ID NO:24 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 15 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:24 Phe Tyr Arg Asn Leu Asn Gin Arg Phe Ala Asp Ala He Val Lys 5 10 15 (26) INFORMATION FOR SEQ ID NO:25 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 11 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:25 Asp Gly Ser Val Met Gin Xaa Xaa Gin Leu Xaa 5 ' 10 (27) INFORMATION FOR SEQ ID NO:26 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 18 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:26 Asn Ala He Asn Thr Ala Val Leu Glu Asn He He Pro Xaa Xaa 5 10 15 Xaa Val Lys (28) INFORMATION FOR SEQ ID NO:27 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 12 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION: SEQ ID NO:27 Leu Val Asn Asp Glu Ala Ser Glu Gly Gin Val Lys 5- 10 (29) INFORMATION FOR SEQ ID NO:28 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 11 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION: SEQ ID NO:28 Xaa Gin Asp He Leu Leu Asn Asn Thr Phe Xaa 5 10 (30) INFORMATION FOR SEQ ID NO:29 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 14 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:29 sp Thr Thr Gin Thr Ala Pro Val Xaa Asn Asn Val Xaa Pro 5 10 (31) INFORMATION FOR SEQ ID NO:30 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 11 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:30 sn Gin Leu Asp Ala Xaa Asn Tyr Ala Glu Val 5 10 (32) INFORMATION FOR SEQ ID NO:31 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 10 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: Yes (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:31 Asn Leu Ser Arg Trp Arg Asn Tyr Ala Glu 5 10 (33) INFORMATION FOR SEQ ID NO:32 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 4 amino- acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: Yes (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:32 Trp Gin Gly Lys (34) INFORMATION FOR SEQ ID NO:33 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 11 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION: SEQ ID NO:33 He Gin Leu Gly Glu Ser Asn Asp Asp Xaa Xaa 5 10 (35) INFORMATION FOR SEQ ID NO:34 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 11 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION: SEQ ID NO:34 Gin Val Pro Thr He Gin Asp Xaa Thr Asn Lys 5 10 (36) INFORMATION FOR SEQ ID NO:35 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 6 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal • (v) SEQUENCE DESCRIPTION: SEQ ID NO:35 He Tyr Xaa Tyr Val Lys 5 (37) INFORMATION FOR SEQ ID NO:36 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 6 amino acids (B) TYPE: Amino acid (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION: SEQ ID NO:36 sn Gin Leu Gly Asn Tyr 5 (38) INFORMATION FOR SEQ ID NO:37 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 4 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear <ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:37 Val Ala Leu Thr (39) INFORMATION FOR SEQ ID NO:38 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 12 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:38 Asp Ala He Val Val Asn Pro Xaa Asp Ser Val Ala 5 10 (40) INFORMATION FOR SEQ ID NO:39 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 9 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:39 Thr Phe Thr Asn Tyr Asp Gly Ser Lys 5 (41) INFORMATION FOR SEQ ID NO:40 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 10 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (ϋi) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:40 Thr Gly Asn Asp Pro. Ser His He Ala Lys 5 10 (42) INFORMATION FOR SEQ ID NO:41 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 7 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:41 He Tyr Glu Ser Gin Gly Lys 5 (43) INFORMATION FOR SEQ ID NO:42 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 12 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION FOR SEQ ID NO:42 Ala Glu Gly Ala Thr Gly Gly Leu Val Pro His Lys 5 10 (44) INFORMATION FOR SEQ ID NO:43 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 10 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:43 Leu Ala Thr Glu Leu Pro Ala Xaa Ser Lys 5 10 (45) INFORMATION FOR SEQ ID NO:44 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 8 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:44 Ser Leu Leu Asp Ala Gly Ala Lys 5 (46) INFORMATION FOR SEQ ID NO:45 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 14 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:45 Glu Lys Pro Gin Asp Leu Asp Asp Asp Pro Leu Tyr Leu Thr 5 10 (47) INFORMATION FOR SEQ ID NO:46 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 11 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:46 Xaa Gin Xaa His Gin Asp Xaa Xaa Asn Leu Thr 5 10 (48) INFORMATION FOR SEQ ID NO:47 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 15 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: -Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION FOR SEQ ID NO:47 Phe Asn Asp Glu Ser He He He Gly Tyr Phe Xaa Xaa Ala Pro 5 10 15 (49) INFORMATION FOR SEQ ID NO:48 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 14 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:48 Ser Arg Leu Phe Leu Phe Asp Tyr Asp Gly Thr Leu Thr Pro 5 10 (50) INFORMATION FOR SEQ ID NO:49 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 11 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:49 Gin Leu Gly Asn Tyr Gly Phe Tyr Pro Val Tyr. 5 10 (51) INFORMATION FOR SEQ. ID NO:50 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 11 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal . (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:50 Phe Leu Val Glu Asn Pro Glu Tyr Val Glu Lys 5 10 (52) INFORMATION FOR SEQ ID NO:51 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 11 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:51 Xaa He Thr Pro His Leu Thr Ala Xaa Ala Ala 5 10 (53) INFORMATION FOR SEQ ID NO:52 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 10 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:52 Thr Leu Met Glu Asp Tyr Gin Ser Ser Lys 5 ' 10 (54) INFORMATION FOR SEQ ID NO:53 (1) SEQUENCE CHARACTERISTICS: (A) LENGTH 15 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V). SEQUENCE DESCRIPTION FOR SEQ ID NO:53 He Leu Glu Gly Leu Thr Gly Ala Asp Phe Val Gly Phe Gin Thr 5 10 15 (55) INFORMATION FOR SEQ ID NO:54 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 14 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal . (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:54 Gin He Leu Xaa Pro Thr Leu Xaa Tyr Gin He Pro Asp Asn 5 10 (56) INFORMATION FOR SEQ ID NO:55 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 7 amino acids 5 (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide 10 (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION FOR SEQ ID NO:55 15 Phe Gly Gly Tyr Ser Asn Lys 5 20 (57) INFORMATION FOR SEQ ID NO:56 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 23 amino acids (B) TYPE: Amino acid 25. (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No 30 (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION FOR SEQ ID NO:56 35 Phe Xaa Thr Glu Asn Ala Glu Asp Gin Asp Xaa Val Ala Xaa Val 5 10 15 He Gly Xaa Ala He Xaa Xaa He 20 40 (58) INFORMATION FOR SEQ ID NO:57 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 18 amino acids 45 (B) TYPE: Amino acid (C) TOPOLOGY: Linear '- (ii) MOLECULAR TYPE: Peptide 50 ' (iϋ) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION FOR SEQ ID NO:57 Xaa Val Gly Thr Val Gly He Pro Thr Asp Glu He Pro Glu Asn 5 10 15 He Leu Ala (59) INFORMATION FOR SEQ ID NO:58 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 19 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptides (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:58 Leu Leu Val His Ser Leu Leu Asn Asn Thr Ser Gin Thr ' Ser Leu 5 10 15 Glu Gly Pro Asn (60) INFORMATION FOR SEQ ID NO:59 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 20 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION FOR SEQ ID NO:59 Ser Ser Thr Thr Asn Thr Ala Thr Leu Xaa Xaa Leu Val Ser Ser 5 10 15 Xaa He Phe Met Glu 20 (61) INFORMATION FOR SEQ ID NO:60 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 15 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:60 Ala Xaa Asn Arg Pro Thr Ser Ala Ala Thr Ser Leu Val Asn Arg 5 10 15 (62) INFORMATION FOR SEQ ID NO:61 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 6 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:61 Xaa Phe Thr He He Xaa 5 (63) INFORMATION FOR SEQ ID NO:62 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 15 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO: 62 sn Leu Thr Ala Asn Ala Thr Thr Ser His Thr Pro Thr Ser Lys 5 10 15 (64) INFORMATION FOR SEQ ID NO:63 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 7 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iϋ) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION FOR SEQ ID NO:63 Phe Xaa Xaa Tyr Ser Asn Lys 5 (65) INFORMATION FOR SEQ ID NO:64 (i) SEQUENCE CHARACTERISTICS: ' (A) LENGTH 7 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal . (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:64 Xaa Pro Xaa Ala Phe Asn Xaa 5 (66) INFORMATION FOR SEQ ID NO:65 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 8 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:65 He Ala Ser Pro He Gin Xaa Glu 5 (67) INFORMATION FOR SEQ ID NO:66 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 7 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION FOR SEQ ID NO:66 Gin Arg Pro Leu Leu Ala Lys 5 (68) INFORMATION FOR SEQ ID NO:67 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 12 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:67 Phe Phe Ser Pro Ser Ser Asn He Pro Thr Asp Arg 5 10 (69) INFORMATION FOR SEQ ID NO:68 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 9 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:68 Ala Leu Ser Asn Asn He Ser Gin Glu 5 (70) INFORMATION FOR SEQ ID NO:69 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 6 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:69 Xaa Xaa Xaa Tyr Thr Pro 5 (71) INFORMATION FOR SEQ ID NO:70 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 16 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:70 He Ala Ser Pro He Gin Gin Gin Gin Gin Asp Pro Thr Ala Asn 5 10 15 Leu (72) INFORMATION FOR SEQ ID NO:71 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 6 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (ϋi) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:71 Thr Met Leu Lys Pro Arg 5 (73) INFORMATION FOR SEQ ID NO:72 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 6 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION FOR SEQ ID NO:72 He He Glu Asp Glu Ala 5 (74) INFORMATION FOR SEQ ID NO:73 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 11 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iϋ) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:73 He Thr Pro His Leu Thr Ala Ser Ala Ala Lys 5 10 (75) INFORMATION FOR SEQ ID NO:74 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 8 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:74 Ser Leu Val Ala Pro Ala Pro Glu 5 (76) INFORMATION FOR SEQ ID NO:75 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 12 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:75 Lys Pro Gin Asp Leu Asp Asp Asp Pro Leu Tyr Leu - 5 10 (77) INFORMATION FOR SEQ ID NO:76 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 6 (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iϋ) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION FOR SEQ ID NO:76 Lys Tyr Ala Leu Leu Arg 5 (78) INFORMATION FOR SEQ ID NO:77 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 11 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION FOR SEQ ID NO:77 Gin Leu Gly Asn Tyr Xaa Phe Tyr Pro Val Tyr 5 10 (79) INFORMATION FOR SEQ ID NO:78 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 8 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION FOR SEQ ID NO:78 Ala Phe Glu Asp His Ser Trp Lys 5 (80) INFORMATION FOR SEQ ID NO:79 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 16 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:79 Ala Gly His Ala He Val Tyr Gly Asp Ala Thr Ser Thr Tyr Ala 5 10 15 Lys (81) INFORMATION FOR SEQ ID NO:80 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 9 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iii) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:80 Glu Arg Leu Pro Gly Ser Tyr Tyr Lys 5 (82) INFORMATION FOR SEQ ID NO:81 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 7 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Peptide (iϋ) HYPOTHETICAL: No (iv) FRAGMENT TYPE: N-terminal (v) SEQUENCE DESCRIPTION FOR SEQ ID NO:81 Thr Leu Met Glu Asp Tyr Gin 5 (83) INFORMATION FOR SEQ ID NO:82 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH 1098 amino acids (B) TYPE: Amino acid (C) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Polypeptide (iii) HYPOTHETICAL: Yes (V) SEQUENCE DESCRIPTION FOR SEQ ID NO:82 Met Ala Leu He Val Ala Ser Leu Phe Leu Pro Tyr Gin Pro Gin 5 10 15 Phe Glu Leu Asp Thr Ser Leu Pro Glu Asn Ser Gin Val Asp Ser 20 25 30 Ser Leu Val Asn He Gin Ala Met Ala Asn Asp Gin Gin Gin Gin 35 40 45 Arg Ala Leu Ser Asn Asn He Ser Gin Glu Ser Leu Val Ala Pro 50 55 60 Ala Pro Glu Gin Gly Val Pro Pro Ala He Ser Arg Ser Ala Thr 65 70 75 Arg Ser Pro Ser Ala Phe Asn Arg Ala Ser Ser Thr Thr Asn Thr 80 85 90 Ala Thr Leu Asp Asp Leu Val Ser Ser Asp He Phe Met Glu Asn 95 100 105 Leu Thr Ala Asn Ala Thr Thr Ser His Thr Pro Thr Ser Lys Thr 110 * 115 120 Met Leu Lys Pro Arg Lys Asn Gly Ser Val Glu Arg Phe Phe Ser 125 130 135 Pro Ser Ser Asn He Pro Thr Asp Arg He Ala Ser Pro He Gin 140 145 150 His Glu His Asp Ser Gly Ser Arg He Ala Ser Pro He Gin Gin 155 160 165 Gin Gin Gin Asp Pro Thr Thr Asn Leu Leu Lys Asn Val Asn Lys 170 175 180 Ser Leu Leu Val His Ser Leu Leu Asn Asn Thr Ser Gin Thr Ser 185 190 195 Leu Glu Gly Pro Asn Asn His He Val Thr Pro Lys Ser Arg Ala 200 205 210 Gly Asn Arg Pro Thr Ser Ala Ala Thr Ser Leu Val Asn Arg Thr 215 220 225 Lys Gin Gly Ser Ala Ser Ser Gly Ser Ser Gly Ser Ser Ala Pro 230 235 240 Pro Ser He Lys Arg He Thr Pro His Leu Thr Ala Ser Ala Ala 245 250 255 Lys Gin Arg Pro Leu Leu Ala Lys Gin Pro Ser Asn Leu Lys Tyr 260 265 270 Ser Glu Leu Ala Asp He Ser Ser Ser Glu Thr Ser Ser Gin His ' 275 280 285 Asn Glu Ser Asp Pro Asp Asp Leu Thr Thr Ala Pro Asp Glu Glu 290 295 300 Tyr Val Ser Asp Leu Glu Met Asp Asp Ala. Lys Gin Asp Tyr Lys 305 310 315 Val Pro Lys Phe Gly Gly Tyr Ser Asn Lys Ser Lys Leu Lys Lys 320 325 330. Tyr Ala Leu Leu Arg Ser Ser Gin Glu Leu Phe Ser Arg Leu Pro 335 340 345 Trp Ser He Val Pro Ser He Lys Gly Asn Gly Ala Met Lys Asn 350 355 360 Ala He Asn Thr Ala Val Leu Glu Asn He He Pro His Arg His 365 370 . 375 Val Lys Trp Val Gly Thr Val Gly He Pro Thr Asp Glu He Pro 380 385 390 Glu Asn He Leu Ala Asn He Ser Asp Ser Leu Lys Asp Lys Tyr 395 400 405 Asp Ser Tyr Pro Val Leu Thr Asp Asp Asp Thr Phe Lys Ala Ala 410 415 420 Tyr Lys Asn Tyr Cys Lys Gin He Leu Trp Pro Thr Leu His Tyr 425 430 435 Gin He Pro Asp Asn Pro Asn Ser Lys Ala Phe Glu Asp His Ser 440 445 450 Trp Lys Phe Tyr Arg Asn Leu Asn Gin Arg Phe Ala Asp Ala He 455 460 465 Val Lys He Tyr Lys Lys Gly Asp Thr He Trp He His Asp Tyr 470 475 480 His Leu Met Leu Val Pro Gin Met Val Arg Asp Val Leu Pro Phe 485 490 495 Ala Lys He Gly Phe Thr Leu His Val Ser Phe Pro Ser Ser Glu 500 505 510 Val Phe Arg Cys Leu Ala Gin Arg Glu Lys He Leu Glu Gly Leu 515 520 525 Thr Gly Ala Asp Phe Val Gly Phe Gin Thr Arg Glu Tyr Ala Arg 530 535 540 His Phe Leu Gin Thr Ser Asn Arg Leu Leu Met Ala Asp Val Val 545 550 555 His Asp Glu Glu Leu Lys Tyr Asn Gly Arg Val Val Ser Val Arg 560 565 570 Phe Thr Pro Val Gly He Asp Ala Phe Asp Leu Gin Ser Gin Leu 575 580 585 Lys Asp Gly Ser Val Met Gin Trp Arg Gin Leu He Arg Glu Arg 590 595 600 Trp Gin Gly Lys Lys Leu He Val Cys Arg Asp Gin Phe Asp Arg 605 610 615 He Arg Gly He His Lys Lys Leu Leu Ala Tyr Glu Lys Phe Leu 620 625 630 Val Glu Asn Pro Glu Tyr Val Glu Lys Ser Thr Leu He Gin He • 635 640 645 Cys He Gly Ser Ser Lys Asp Val Glu Leu Glu Arg Gin He Met 650 655 660 He Val Val Asp Arg He Asn Ser Leu Ser Thr Asn He Ser He 665 670 675 Ser Gin Pro ' Val Val Phe Leu His Gin Asp Leu Asp Phe . Ser Gin 680 685 690 Tyr Leu Ala Leu Ser Ser Glu Ala Asp Leu Phe Val Val Ser Ser 695 700 705 Leu.Arg Glu Gly Met Asn Leu Thr Cys His Glu Phe He Val Cys 710 715 720 ' Ser Glu Asp Lys Asn Ala Pro Leu Leu Leu Ser Glu Phe Thr Gly 725 730 735 Ser Ala Ser Leu Leu Asn Asp Gly Ala He He He Asn Pro Trp 740 745 750 Asp Thr Lys Asn Phe Ser Gin Ala He Leu Lys Gly Leu Glu Met 755 760 765 Pro Phe Asp Lys Arg Arg Pro Gin Trp Lys Lys Leu Met Lys Asp 770 775 780 He He Asn Asn Asp Ser Thr Asn Trp He Lys Thr Ser Leu Gin 785 790 795 Asp He His He Ser Trp Gin Phe Asn Gin Glu Gly Ser Lys He 800 805 810 Phe Lys Leu Asn Thr Lys Thr Leu Met Glu Asp Tyr Gin Ser Ser 815 820 825 Lys Lys Arg Met Phe Val Phe Asn He Ala Glu Pro Pro Ser Ser 830 835 840 Arg Met He Ser He Leu Asn Asp Met Thr Ser Lys Gly Asn He 845 850 855 Val Tyr He Met Asn Ser Phe Pro Lys Pro He Leu Glu Asn Leu 860 865 870 Tyr Ser Arg Val Gin Asn He Gly Leu He Ala Glu Asn Gly Ala 875 880 885 Tyr Val Ser Leu Asn Gly Val Trp Tyr Asn He Val Asp Gin Val 890 895 900 Asp Trp Arg Asn Asp Val Ala Lys He Leu Glu Asp Lys Val Glu 905 910 915 Arg Leu Pro Gly Ser Tyr Tyr Lys He Asn Glu Ser Met He Lys 920 925 930 Phe His Thr Glu Asn Ala Glu Asp Gin Asp Arg Val Ala Ser Val 935 940 945 He Gly Asp Ala He Thr His He Asn Thr Val Phe Asp His Arg 950 955 960 Gly He His Ala Tyr Val Tyr Lys Asn Val Val Ser Val Gin Gin 965 970 975 Val Gly Leu Ser Leu Ser Ala Ala Gin Phe Leu Phe Arg Phe Tyr 980 985 990 Asn Ser Ala Ser Asp Pro Leu Asp Thr Ser Ser Gly Gin He Thr 995 1000 1005 Asn He Gin Thr Pro Ser Gin Gin Asn Pro Ser Asp Gin Glu Gin 1010 1015 1020 Gin Pro Pro Ala Ser Pro Thr Val Ser Met Asn His He Asp Phe 1025 1030 1035 Ala Cys Val Ser Gly Ser Ser Ser Pro Val Leu Glu Pro Leu Phe 1040 1045 1050 Lys Leu Val Asn Asp' Glu Ala Ser Glu Gly Gin Val Lys Ala Gly 1055 1060 1065 His Ala He Val Tyr Gly Asp Ala Thr Ser Thr Tyr Ala Lys Glu 1070 1075 1080 His Val Asn Gly Leu Asn Glu Leu Phe Thr He He Ser Arg He 1085 1090 1095 He Glu Asp 1098 (84) INFORMATION FOR SEQ ID NO:83 (i) SEQUENCE CHARACTERISTICS (A) LENGTH 5981 basepairs (B) TYPE: Nucleotide (C) STRANDEDNESS: Doublestranded (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Genomic DNA (iii) HYPOTHETICAL: No (iv) ANTI-SENSE: No (Vi) ORIGINAL SOURCE: (A) ORGANISM: Saccharomyces cerevisiae (B) STRAIN: S288C (C) HAPLOTYPE: Haploid (vii) IMMEDIATE SOURCE: (A) LIBRARY: Genomic (B) CLONES: 6 and 10 (viϋ) POSITION IN GENOME (A) CHROMOSOME: 13 (Xi) SEQUENCE DESCRIPTION: SEQ ID NO:83 GGCTCACATT CCAAAAAGAA CAGTTCGAAC GATAAAGCTT TTCACCGCTG 50 GTGGTGATAA CAAGGTTAGG ATATGGAAGT TGAACAGAGA TGAAAACGGA 100 CAAAATGGGG GGGTGCGTAA GATTGAAAGC CTTGACTTTC TTGGCTCGTG 150 ACGCATCACG AACAGGCCAT AAATGTAATC CGATTCAACT CGAAGGGTGA 200 CGTACTGGCG TCTGCGGGCG ATGACGGCCA AGTGCTGCTA TGGAAGCAAG 250 AAGAACCAAA TACACAGCAA GAATCTGTGG TCAGACCATT CGGAATGGAT 300 GCGGAGACTA GTGAAGCAGA CGAGAACAAG GAGAAATGGG TTGTGTGGAA 350 ACGGCTGCGT GGTGGTAGCG GTGCTACTGC GGCGGCAGAG ATTTACGATC 400 TAGCGTGGTC ACCTGATAAC AGGAACATAG TGGTGGCATG TATGGACAAT 450 TCGATACGAC TGTTCGATGT TGGAGCTGGG ATGCTGGTAT GCGGCCAGTC 500 GGATCATGGT CACTACGTCC AAGGTCTTGC ATGGGACCCA TTAAATCAGT 550 TTATTCTCTC ACAGTCTGCG GACCGGTCTC TGCATGTATA TGGAGTCATT 600 CTTTCATCTG CAGGAGTTAG TTACAGGGCT TGAAACTTTA GAAGTAAGGT 650 TGCCAAGGCA GAACTGCCTT GTCCAGGTGA TGTCCTGAGG ACAAATTACT 700 TTTTCACAAC GAGACGCTAC CTTCATTCTT TAGGCGATGC AGCATATCGC 750 CTTGTGGTGG TTTGGTCGTA ATTCCCAGTG GTGTGTATAA GGTGGCTGGT 800 GATGAAGTCG CGAACTGCGT ATACGTGTAT ACTAGATCTG GAATACTGAA 850 CAGCGCTGGT GGCGTTAAAA ACCGGCCTGC GATTAGAATC CCATCTTTGA 900 AGAAACCAGC GCTGATGGCG GCTTTCTCGC CCGTATTTTA CGAAACGTGC 950 CAGAAGAGTG TGCTTAAGCT GCCCTATAAG CTAGTATTTG CCATAGCAAC 1000 GACTAACGAA GTACTCGTGT ACGACACGGA TGTATTGGAG CCGTTATGCG 1050 TTGTGGGAAA TATACATTAC TCACCCATAA CTGATTTAGC ATGGTCTGAG 1100 GATGGCTCGA CCCTACTAAT CTCATCAACA GACGGATTCT GTTCGTATGT 1150 ATCGATCGAC ACAGAAACGC AATTCGGTTC AAGGATAGAG CCGCCAGCGA 1200 TGCATGCAGA GCCACTAGAC ACTGACGAGA GCGCGGTAGC GGCTAAGAAC 1250 CAGCGCGAGG CAGGTGGGAT CGTGAACATG CTGCCGGTGA AGAAGATCCC 1300 CTGCAATAGT AGCGATAGTA AAAAGAGGCG CATACATCCT ACGCCAGTCG 1350 ATTTGTGATT TTTAATATAT TTAATGCGGT ACATAAGAAT GCCTAATCTA 1400 GTTTGCCAGC GAAGATATTT TCCATTGTGT GCTCAATGGA CCCTGTGTTC 1450 CTGAGATCTT GCACGACTTT TTCCTGAGGC ACATGTGGCG CCATCGTCAT 1500 CACGATTTCA ACCATGTCAC TATTAACGGC TCTCTTTCGA TCACTACCAT 1550 GTCTGTTTAA CCGAGCAACG CGTTCCTCCG GAGCCGATGG TACTGGCTCC 1600 GGAGAAGGGT CGTTGGTGGC GACCGAGGGC GCCGGTTTGG CATCCTGTAC 1650 GGTCCGCAAG GGTACTTGCT TGGCGCCCCT GTGTTTCACG GTGTAAACAA 1700 ACAAGCACAC CATCGTCAGT ATAAAGCACT ATAGTCGAAC CATCCATTTT 1750 TACTTTTGTG CGCGTGGGTA GCCGTGCCTC GTCTGTGTGT GTGGGAATGT 1800 ATAAATGTGT CCCGAGTTAT TATTCTAAAG CGGGCACCAT TGTAGTAACT 1850 TATTGCGAAA TTTCTGCTCT TCTCGTCTCG CTCAAAAATC GCGTTCAGGG 1900 TAAAAGGGGC GAAACAGAGG GCCAGATAGA AATTTCGAGA AAACGGGTCA 1950 CCCCGCCCCT GCATTTTGAT ATGGCGTATT TGGGATTGCT TGCTCGAAAG 2000 TGTCTAAGTC CGGCTGGCGG GCCTGGCGCC CTCGCCGAAG GGAGATAGGA 2050 AGGGGCGGGG GTCCGGGCAG CGGCTATGGT GTCAGTTACC TAGGGAAGGA 2100 GAAGGGGGTA GAACCAAGGG GCTAGCACAC TCACCCTGGG GCCCCCGTCT 2150 AGCCAAGCTT AAATATAAAT ACTAATGTAA CTATAAATAT AAGGATCTAC 2200 CGTGTCATTG CACATCCACC CACCCGTCGA TTAAAAAACC AAACAAAGCA 2250 AAGAATACAA TAGCAACGCA AGATCAACAC AATGGCTCTC ATCGTGGCAT 2300 CTTTGTTTTT GCCCTACCAA CCACAATTCG AGCTTGACAC CTCTCTCCCT 2350 GAGAACTCGC AGGTGGACTC ATCTCTCGTG AACATCCAGG CTATGGCCAA 2400 TGACCAACAG CAACAACGTG CGCTTTCTAA CAACATCTCA CAGGAATCAT 2450 TGGTCGCGCC AGCACCAGAA CAAGGTGTCC CCCCAGCAAT CTCAAGGAGT 2500 GCCACCAGGT CACCCAGTGC TTTCAACCGC GCCTCGTCTA CGACAAATAC 2550 TGCCACTTTA GATGATCTTG TCTCTTCGGA CATATTCATG GAAAACTTGA 2600 CTGCGAATGC AACTACCTCA CATACGCCAA CAAGCAAGAC TATGCTTAAA 2650 CCCCGGAAAA ATGGTTCCGT GGAACGATTC TTCTCCCCTT CTTCCAATAT 2700 TCCCACGGAT CGCATCGCAT CGCCAATCCA GCATGAGCAT GACTCCGGTT 2750 CGAGAATTGC TTCGCCAATC CAACAGCAAC AGCAGGACCC CACGACCAAC 2800 TTATTAAAGA ACGTCAACAA GTCATTGTTA GTGCACTCAC TGTTGAACAA 2850 CACCTCACAA ACTAGCCTAG AAGGACCCAA CAACCACATT GTTACCCCGA 2900 AATCGAGGGC GGGCAACAGG CCTACTTCGG CGGCTACTTC TTTAGTTAAT 2950 AGGACCAAAC AAGGTTCGGC CTCCTCTGGA TCTTCTGGGT CTTCTGCGCC 3000 ACCTTCCATT AAAAGGATTA CGCCCCACTT GACTGCGTCT GCTGCAAAAC 3050 AGCGTCCCTT ATTGGCTAAA CAGCCTTCTA ATCTGAAATA TTCGGAGTTA 3100 GCAGATATTT CGTCGAGTGA GACGTCTTCG CAGCATAATG AGTCGGACCC 3150 GGATGATCTA ACTACTGCCC CTGACGAGGA ATATGTTTCT GATTTGGAAA 3200 TGGATGACGC GAAGCAGGAC TACAAGGTTC CAAAGTTCGG CGGCTATTCC 3250 AATAAATCTA AACTTAAGAA ATATGCGCTG TTAAGGTCAT CTCAGGAGCT 3300 GTTTAGCCGT CTTCCATGGT CGATCGTTCC CTCTATCAAA GGTAATGGCG 3350 CCATGAAGAA CGCCATAAAC ACTGCAGTCT TGGAGAATAT CATTCCGCAC 3 00 CGTCATGTTA AGTGGGTCGG TACCGTCGGA ATCCCAACGG ATGAGATTCC 3450 GGAAAATATC CTTGCGAACA TCTCTGACTC TTTAAAAGAC AAGTACGACT 3500 CCTATCCTGT CCTTACGGAC GACGACACCT TCAAAGCCGC ATACAAAAAC 3550 TACTGTAAAC AAATCTTGTG GCCTACGCTG CATTACCAGA TTCCAGACAA 3600 TCCGAACTCG AAGGCTTTTG AAGATCACTC TTGGAAGTTC TATAGAAACT 3650 TAAACCAAAG GTTTGCGGAC GCGATCGTTA AAATCTATAA GAAAGGTGAC 3700 ACCATCTGGA TTCATGATTA CCATTTAATG CTGGTTCCGC AGATGGTGAG 3750 AGACGTCTTG CCTTTTGCCA AAATAGGATT TACCTTACAT GTCTCGTTCC 3800 CCAGTAGTGA AGTGTTTAGG TGTCTGGCTC AGCGTGAGAA GATCTTAGAA 3850 GGCTTGACCG GTGCAGACTT TGTCGGCTTC CAGACGAGGG AGTATGCAAG 3900 ACATTTCTTA CAGACGTCTA ACCGTCTGCT AATGGCGGAC GTGGTACATG 3950 ATGAAGAGCT AAAGTATAAC GGCAGAGTCG TTTCTGTGAG GTTCACCCCA 4000 GTTGGTATCG ACGCCTTTGA TTTGCAATCG CAATTGAAGG ATGGAAGTGT 4050 CATGCAATGG CGTCAATTGA TTCGTGAAAG ATGGCAAGGG AAAAAACTAA 4100 TTGTGTGTCG TGATCAATTC GATAGAATTA GAGGTATTCA CAAGAAATTG 4150 TTGGCTTATG AAAAATTCTT GGTCGAAAAT CCGGAATACG TGGAAAAATC 4200 GACTTTAATT CAAATCTGTA TTGGAAGCAG TAAGGATGTA GAACTGGAGC 4250 GCCAGATCAT GATTGTCGTG GATAGAATCA ACTCGCTATC CACCAATATT 4300 AGTATTTCTC AACCTGTGGT ' GTTTTTGCAT CAAGATCTAG ATTTTTCTCA 4350 GTATTTAGCT TTGAGTTCAG AGGCAGATTT GTTCGTAGTC AGCTCTCTAA 4400 GGGAAGGTAT GAACTTGACA TGTCACGAAT TTATCGTTTG TTCTGAGGAC 4450 AAAAATGCTC CCCTACTGTT GTCAGAATTT ACTGGTAGTG CATCTTTATT 4500 GAATGATGGC GCTATAATAA TTAACCCATG GGATACCAAG AACTTCTCAC 4550 AAGCCATTCT CAAGGGGTTG GAGATGCCAT TCGATAAGAG AAGGCCACAG 4600 TGGAAGAAAT TGATGAAAGA CATTATCAAC AACGACTCTA CAAACTGGAT 4650 CAAGACTTCT TTACAAGATA TTCATATTTC GTGGCAATTC AATCAAGAAG 4700 GTTCCAAGAT CTTCAAATTG AATACAAAAA CACTGATGGA AGATTACCAG 4750 TCATCTAAAA AGCGTATGTT TGTTTTCAAC ATTGCTGAAC CACCTTCATC 4800 GAGAATGATT TCCATACTGA ATGACATGAC TTCTAAGGGC AATATCGTTT 4850 ACATCATGAA CTCATTTCCA AAGCCCATTC TGGAAAATCT TTACAGTCGT 4900 GTGCAAAACA TTGGGTTGAT TGCCGAGAAT GGTGCATACG TTAGTCTGAA 4950 CGGTGTATGG TACAACATTG TTGATCAAGT CGATTGGCGT AACGATGTAG 5000 CCAAAATTCT CGAGGACAAA GTGGAGAGAT TACCTGGCTC GTACTACAAG 5050 ATAAATGAGT CCATGATCAA GTTCCACACT GAAAATGCGG AAGATCAAGA 5100 TCGTGTAGCT AGTGTTATCG GTGATGCCAT CACACATATC AATACTGTTT 5150 TTGACCACAG AGGTATTCAT GCCTACGTTT ACAAAAACGT TGTTTCCGTA 5200 CAACAAGTGG GACTTTCCTT ATCGGCAGCT CAATTTCTTT TCAGATTCTA 5250 TAATTCTGCT TCGGATCCAC TGGATACGAG TTCCGGCCAA ATCACAAATA 5300 TTCAGACACC ATCTCAACAA AATCCTTCAG ATCAAGAACA ACAACCTCCA 5350 GCCTCTCCCA CTGTGTCGAT GAACCATATT GATTTCGCAT GTGTCTCTGG 5400 TTCATCGTCT CCTGTGCTTG AACCATTGTT CAAATTGGTC AATGATGAAG 5450 CAAGTGAAGG GCAAGTAAAA GCCGGACACG CCATTGTTTA TGGTGATGCT 5500 ACTTCTACTT ATGCCAAAGA ACATGTAAAT GGGTTAAACG AACTTTTCAC 5550 GATCATTTCA AGAATCATTG AAGATTAAAT TTTACCATTT TAAAATTTTA 5600 ATGTTCTTGG GTATGAACTT TTATTTTCAA CTGCTTATTA TATATCAATT 5650 CTATAAATTT TTTTCTTCTC TCTAACGACC AATTATAAAA TTCATCCTCT 5700 TATTTATTAC AGCATCTTAT ACATTATGTA TATGGGTAGC TATTATTCAT 5750 TTTTGCTTCG TAAGGACTTT TTTTGTCAAC TTTTTCATCC TAAGCGGCTA 5800 AAAGTGATTG GAGAGGAATG TCCAGGCGAC CAATGATAAA AACGCTTTCT 5850 CTTGGAACAA GAAATAGGAG CAATTGACAG TTGTCGATGA ACAGCGAAAA 5900 TAGTAAGATA ACCTTCAAGC CCAATATTCT AATTAAAGGC GTTTATATAT 5950 TTGTACTTTA TGGTATGTGC ATATGTATTG T 5981 10 (85) INFORMATION FOR SEQ ID NO:84 (i) SEQUENCE CHARACTERISTICS (A) LENGTH50 base pairs 15 (B) TYPE: Nucleotide (C) STRANDEDNESS: Doublestranded (D)TOPOLOGY: Linear (ii) MOLECULAR TYPE: Synthetic DNA 20 (iii) HYPOTHETICAL: No (iv) ANTISENSE: No 25. (xi) SEQUENCE DESCRIPTION: SEQ ID NO:84 CGGGAAGACA TAGAACTATG ACTACGGATA ACGCTAAGGC GCAACTGACC 50 30 (86) INFORMATION FOR SEQ ID NO:85 (i) SEQUENCE CHARACTERISTICS (A) LENGTH48 basepairs 35 (B) TYPE: Nucleotide (C) STRANDEDNESS: Doublestranded (D) TOPOLOGY: Linear (ii) MOLECULAR TYPE: Synthetic DNA 0 (iii) HYPOTHETICAL: No (iv) ANTISENSE: No 5 (xi) SEQUENCE DESCRIPTION: SEQ ID NO:85 GGGCCCAACA ACACAATGGT TACCCCGAAA TCGAGGGCGG GCAACAGG 48 0 INDICATIONS RELAΗNG TO A DEPOSITED MICROORGANISM (PCT Rule 13bis) A. Tbe indications made below relate to tbe microorganism referred to in tbe description on page 25 Jine 16 B. IDENTIFICATION OF DEPOSIT Further deposits are identified on an additional sheet | Name of depositary institution DSM-DEUTSCHE SAMMLUNG VON MIKROORGANISMEN UND Z iTiKULTOREN GmbH Address of depositary institution (including postal code and country) Mascheroder Weg 1 B, D-3300 Braunschweig, Federal Republic of Germany Date of deposit Accession Number 18 February 1992 DSM 6928 C. ADDITIONAL INDICATIONS (leave blank if not applicable) This information is continued on an additional sheet In respect of those designations in which a European patent is sought, • a sample of the deposited microorganism will be made available only by the issue of such a sample to an expert nominated by the person requesting the sample (Rule 28(4) EPC) until the publication of the mention of the . grant of the European patent or until the date on which the application has been refused or is deemed to be withdrawn. D. DESIGNATED STATES FOR WHICH INDICATIONS ARE MADE (if the indications are not for ail designated Stale E. SEPARATE FURNISHING OF INDICATIONS (leave blank if not applicable) Tbe indications listed below will be submitted to tbe international Bureau later (specify the general nature of the indications e.g., 'Accessi Number of Deposit") For international Bureau use onlv D This sheet was received bv tbe international Bureau o Authorized officer INDICATIONS RELATING TO A DEPOSITED MICROORGANISM (PCT Rule 13-άs) A. Tbe inαicauons made beiow relate to ωe microorganism referred to in the description on page 25 , line 28 B. IDENππCATIOΝ OF DEPOSIT Further deposits are identified on an additional sheet j_J Name of depositary institution DSM-DEϋTSCHE S-tøIMLONG VCN MIKROORGANISMEN UND ZKT,T,KϋLTUREN GmbH Address of depositary institution t including postal code and country) Mascheroder Weg 1 B, D-330Q Braunschweig, Federal Republic of Germany Date of dei-αsit Accession Number 25 January 1993 DSM 7425 C. ADDITIONAL INDICATIONS (leave blank if not applicable) This information is continued on an additional sheet | [ In respect of those designations in which a European patent is sought, a sample of the deposited microorganism will be made available only by the issue of such a sample to an expert nσrtύnated by the person requesting the sample (Rule 28(4) EPC) until the publication of the mention of the grant of the European patent or until the date on which the application has been refused or is deemed to be withdrawn. D. DESIGNATED STATES FOR WHICH INDICATIONS ARE MADE (if the indicaaons are not for aii designated States) E. SEPARATE FURNISHING OF INDICATIONS (leave blank if not applicable) The indications listed beiow will besuomiπeα to tne international Bureau izieτ (specify uiegeneratnaiureoftneindicauonse.g.. 'Accession Nu oer of Deposit') For international Bureau use oniv D This sheet was received bv tbe international Bureau on: Authorized officer

Claims: CLAIMS : 1. Genes, which comprise at least one of the isolated and purified PNA sequences coding for the short chain of about 57 kDa and the long chains of about 99 kDa and about 123 kDa of trehalose synthase and functional equivalents thereof. 2. The genes of claim 1, wherein the isolated and purified PN sequence encodes the amino acid sequences of the short chain o about 57 kPa having the SEQ IP NO: 2 or functional equivalents thereof. 3. The genes of claim 1 wherein the isolated and purified PNA sequence encodes the amino acid sequences of the long chain of about 123 kDa comprising the SEQ ID NO: 4 or functional equivalents thereof. 4. The genes of claim 1 wherein the isolated and purified DNA sequence encodes the amino acid sequences of the long chain of about 123 kDa comprising the SEQ ID NO: 82 or functional equivalents thereof. 5. The genes of claim 1 wherein the isolated and purified DNA sequence encodes the amino acid sequences of the long chain of about 99 kDa having the SEQ ID NO: 29 - 38 and 44 - 49 or functional equivalents thereof. 6. The genes of claim 1, which are selected from the group consisting of TSSl, TSLl and TSL2 and functional equivalents thereof. 7. The genes of claim 6, wherein TSSl comprises the open reading frame of SEQ ID NO: 1 or functional equivalents thereof. 8. The genes of claim 6, wherein TSLl comprises the open reading frame of SEQ ID NO: 3 or functional equivalents thereo 9. The genes of claim 6, wherein TSLl comprises the open reading frame SEQ ID NO: 83 or functional equivalents thereof. 10. The genes of claim 6, wherein TSL2 comprises the PNA sequences inserted into pALK756 (PSM7425) or functional equivalents thereof. 11. A truncated TSLl gene encoding a truncated form of the 123 kPa long chain of trehalose synthase lacking up to 600 amino acids from one end preferably the N-terminus. 12. The truncated TSLl gene of claim 11, wherein the long chain lacks up to 330 amino acids from the N-terminus end. 13. The truncated TSLl gene of claim 11, wherein the long chain lacks 250 - 450 amino acids from the N-terminus end. 14. The truncated TSLl gene of claim 11, wherein the long chain lacks 250 - 450, preferably about 325 amino acids from the N-terminus end. 15. The truncated TSLl gene of claim 11, wherein the long chain lacks 209 amino acids from the N-terminus end. 16. A vector which comprises at least one of the genes of claims 1 - 15. 17. A DNA construct which comprises at least one of the genes of claims 1 - 15. 18. Host cells or organisms transformed with at least one of the vectors of claim 16. 19. Host cells or organisms transformed with at least one of DNA constructs of claim 17. 20. Host cells or organisms transformed with the truncated TSLl gene of claims 10 - 15. 21. The transformed host cells or organisms of claims 18 or 19, which express a trehalose synthase which exhibits trehalose-6-phosphate synthase activity activatable by fructose-6-phosphate and also trehalose-6-phosphatase activity. 22. The transformed host cells or organisms of claim 20, which express a trehalose synthase that is less inhibited by phosphate than is the intact trehalose synthase. 23. The transformed host cells or organisms of any of claims 18 to 22, which are selected from a group consisting of plants, fungi, yeasts or bacteria. 24. The transformed host cells or organisms of claims 23, wherein the yeast is Saccharomyces cerevisiae. 25. The transformed host cells or organisms of any of claims 18 to 22, wherein parts of the organism have increased trehalose content as compared to the corresponding parts of the parent cell or organism when grown under the same conditions. 26. The transformed host cells or organisms of any of claims 18 to 22, wherein said cells or organisms produce a higher yield of ethanol from carbohydrate than the parent cell or organism. 27. The transformed host cells or organisms of any of claims claims 18 to 22, wherein said cells or organisms are more resistant to heat, cold and water deprivation than are the parent cell or organism. 28. A trehalose synthase produced by recombinant DNA techniques using at least one of the genes of claims 1 to 15. 29. A substantially purified trehalose synthase, which exhibits trehalose-6-phosphate synthase activity activatable by fructose-6-phosphate and also trehalose-6-phosphatase activity. 30. A substantially purified trehalose synthase, which exhibits trehalose-synthase activity less sensitive to inhibition by phosphate. 31. The trehalose synthase of claims 28 to 30, which comprises one short chain of about 57 kDa and at least one of two long chains of about 99 kDa and 123 kDa or truncated forms of the 123 kPa chain. 32. The trehalose synthase of claim 31, wherein the short chain comprises the amino acid sequence of SEQ IP NO: 2 or functional equivalents thereof. 33. The trehalose synthase of claim 31, wherein the 123 kPa long chain comprises the amino acid sequence of SEQ IP NO: 4 or functional equivalents thereof. • 34. The trehalose synthase of claim 31, wherein the 123 kPa long chain comprises the amino acid sequence of SEQ IP NO: 82 or functional equivalents thereof. 35. The trehalose synthase of claim 31, wherein the 99 kPa long chain comprises a majority, preferably at least ten of the amino acid sequences SEQ IP NO:s 29 to 38 and 44 to 49 or functional equivalents thereof. 36. The trehalose synthase of claim 31, wherein the 99 kPa long chain comprises the amino acid sequences encoded by the DNA sequence inserted into pALK756 (DSM7425) or functional equivalents thereof. 37. A trehalose-6-phosphate synthase, which comprises the 57 kDa polypeptide corresponding to the short chain of claim 31 and having the amino acid sequence of SEQ ID. NO: 2 or functional equivalents thereof. 38. A trehalose-6-phosphate phosphatase, which comprises an about 99 kDa polypeptide corresponding to the long chain of claims 33 - 34. 39. A process for producing ethanol by using the host cells or organisms of claims 22 or 23, wherein the yield of ethanol or its rate of production is greater than by using the untransformed cell or organism. 40. The process of claim 39, wherein the organism is distiller's yeast. 41. The process of claim 39, wherein at least one of the DNA sequences of claims 1 - 15 are functionally combined with promoters active under fermentative conditions. 42. A process for producing a crop plant which has increased resistance to water deprivation, heat and cold, comprising transforming the plant by introducing at least one of the gene of claims 1 - 15 into said plant's tissue. 43. A process for producing trehalose by cultivating a host or organism which has been transformed with at least one of the genes of claims 1 - 15. 44. The process according to claim 43, wherein the transformed host cell or organism is a fungus, yeast or plant. 45. The process according to claim 44, wherein the yeast is Saccharomyces cerevisiae. 46. A process for producing trehalose enriched food products from plants by introducing at least one of the genes of claims 1 - 15 and allowing said genes to express the trehalose synthase in the edible tissues of the plant. 47. The process of claim 46, wherein the trehalose is purified by conventional methods. 48. The process of claim 46, wherein the trehalose is used as such or as an unpurified homogenate. 49. A method for selecting strains which have been transformed with at least one of the genes of claims 1 - 15, wherein the selection medium comprises galactose as the main carbon source.

Inventors: LONDESBOROUGH JOHN, VUORIO OUTI, LONDESBOROUGH, JOHN, VUORIO, OUTI
Applicants: ALKO AB OY, OY ALKO AB
Application year: 1993
Main classification: C12N
IPC codes: C07K14, C12N9, C12N15, C12P19, C12R1