Protein: S-adenosyl-L-methionine-dependent Diels-Alderase iliD (EC 2.1.-.-) (C-methyltransferase iliD) (Ilicicolin H biosynthesis cluster protein D) (Pericyclase iliD) (P0DO33)
Organism: Neonectria sp. (strain DH2)
Function: S-adenosyl-l-methionine-dependent Diels-Alderase; part of the gene cluster that mediates the biosynthesis of ilicicolin H, a 4-hydroxy-2-pyridonealkaloid that has potent and broad antifungal activities by inhibiting the mitochondrial respiration chain. IliD catalyzes the Diels-Alder reaction that converts the acyclic 2-pyridone intermediate to 8-epi-ilicicolin H. The biosynthesis of ilicicolin H starts with formation of the tetramic acid by the hybrid PKS-NRPS synthetase iliA with the partnering trans-enoyl reductase iliB since iliA lacks a designated enoylreductase (ER) domain. The cytochrome P450 monooxygenase iliC then catalyzes the ring expansion of the tetramate to the acyclic 2-pyridone. The pericyclase iliD further converts the acyclic 2-pyridone into 8-epi-ilicicolin H. 8-epi-ilicicolin H might then spontaneously convert to ilicicolin H since ilicicolin H is produced in the absence of the epimerase iliE, in contrast to what was observed for the Talaromyces variabilis ilicolin H biosynthetic pathway (Probable).
Sequence: MTSTEAAGTGKAPAIRANPALQTYYESQESYLVYEVVLRGSHHFGFYEKDTYWPFPVGRSLERMEAKLLSALALPSGSQILDAGCGFGPVAISMAKKGMRVTAIDIIDHHVTKARRNVEKAGLPKGQVTVEKMDYQHLESIASESHDDAKAAATGFFRILKPGGRIAFFEAQRSRTSGDYDEGDELAGHLKLVNEYTAMPTNELSREDYFKDLLEDAGFVDVEFTLPPGTREPREHWSYSALKA
InterPro domains: - IPR050447: Erg6/SMT methyltransferase (family) [23-220]
- IPR041698: Methyltransferase domain 25 (domain) [80-164]
- IPR029063: S-adenosyl-L-methionine-dependent methyltransferase superfamily (homologous_superfamily) [14-242]
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0003824 (catalytic activity), GO:0016740 (transferase activity), GO:0016741 (transferase activity, transferring one-carbon groups), GO:0008168 (methyltransferase activity), GO:0008757 (S-adenosylmethionine-dependent methyltransferase activity)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009987 (cellular process), GO:0009058 (biosynthetic process), GO:0044237 (cellular metabolic process), GO:0044281 (small molecule metabolic process), GO:0032259 (methylation), GO:0006807 (nitrogen compound metabolic process), GO:0019748 (secondary metabolic process), GO:0071704 (organic substance metabolic process), GO:0044550 (secondary metabolite biosynthetic process), GO:0042180 (cellular ketone metabolic process), GO:1901615 (organic hydroxy compound metabolic process), GO:1901360 (organic cyclic compound metabolic process), GO:1901576 (organic substance biosynthetic process), GO:1901564 (organonitrogen compound metabolic process), GO:0044283 (small molecule biosynthetic process), GO:0120254 (olefinic compound metabolic process), GO:0044249 (cellular biosynthetic process), GO:0006066 (alcohol metabolic process), GO:0009404 (toxin metabolic process), GO:0006725 (cellular aromatic compound metabolic process), GO:0034641 (cellular nitrogen compound metabolic process), GO:0043603 (amide metabolic process), GO:0018904 (ether metabolic process), GO:0030638 (polyketide metabolic process), GO:1901566 (organonitrogen compound biosynthetic process), GO:1902652 (secondary alcohol metabolic process), GO:1901503 (ether biosynthetic process), GO:1901362 (organic cyclic compound biosynthetic process), GO:0043385 (mycotoxin metabolic process), GO:0120255 (olefinic compound biosynthetic process), GO:0009403 (toxin biosynthetic process), GO:1902644 (tertiary alcohol metabolic process), GO:0019438 (aromatic compound biosynthetic process), GO:1901617 (organic hydroxy compound biosynthetic process), GO:0043604 (amide biosynthetic process), GO:0044271 (cellular nitrogen compound biosynthetic process), GO:0042181 (ketone biosynthetic process), GO:0046165 (alcohol biosynthetic process), GO:0030639 (polyketide biosynthetic process), GO:0018958 (phenol-containing compound metabolic process), GO:0043386 (mycotoxin biosynthetic process), GO:1902645 (tertiary alcohol biosynthetic process), GO:1902653 (secondary alcohol biosynthetic process), GO:0046189 (phenol-containing compound biosynthetic process)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005737 (cytoplasm), GO:0005622 (intracellular anatomical structure)