Protein: Phenolphthiocerol/phthiocerol polyketide synthase subunit A (EC 2.3.1.292) ((Phenol)carboxyphthiodiolenone synthase subunit A) (Beta-ketoacyl-acyl-carrier-protein synthase I) (Phthiocerol synthesis polyketide synthase type I PpsA) (P9WQE7)
Organism: Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv)
Function: Part of the PpsABCDE complex involved in the biosynthesis of the lipid core common to phthiocerols and phenolphthiocerols by successive additions of malonyl-CoA or methylmalonyl-CoA extender units. PpsA can accept as substrate the activated forms of either icosanoyl (C20), docosanoyl (C22) or lignoceroyl (C24) groups from FadD26, or a (4-hydroxyphenyl)-C17 or (4-hydroxyphenyl)-C19 fatty acyl from FadD29. PpsA initiates the biosynthesis and extends its substrate using a malonyl-CoA extender unit. The PpsB and PpsC proteins add the second and third malonyl-CoA extender units. PpsD adds an (R)-methylmalonyl unit and PpsE adds a second (R)-methylmalonyl unit. The incorporation of the methylmalonyl units results in formation of two branched methyl groups in the elongated product.
Interaction partners:
- Probable fatty acid synthase Fas
- Long-chain-fatty-acid--AMP ligase FadD26
- Phenolphthiocerol/phthiocerol polyketide synthase subunit B
- Phenolphthiocerol/phthiocerol polyketide synthase subunit C
- Phenolphthiocerol/phthiocerol polyketide synthase subunit E
- Phenyloxazoline synthase MbtB
- Phenolphthiocerol/phthiocerol polyketide synthase subunit D
- Malonyl CoA-acyl carrier protein transacylase
- Isonitrile lipopeptide synthase
- Doxorubicin resistance ATP-binding protein DrrA
Sequence:
MTGSISGEADLRHWLIDYLVTNIGCTPDEVDPDLSLADLGVSSRDAVVLSGELSELLGRTVSPIDFWEHPTINALAAYLAAPEPSPDSDAAVKRGARNSLDEPIAVVGMGCRFPGGISCPEALWDFLCERRSSISQVPPQRWQPFEGGPPEVAAALARTTRWGSFLPDIDAFDAEFFEISPSEADKMDPQQRLLLEVAWEALEHAGIPPGTLRRSATGVFAGACLSEYGAMASADLSQVDGWSNSGGAMSIIANRLSYFLDLRGPSVAVDTACSSSLVAIHLACQSLRTQDCHLAIAAGVNLLLSPAVFRGFDQVGALSPTGQCRAFDATADGFVRGEGAGVVVLKRLTDAQRDGDRVLAVICGSAVNQDGRSNGLMAPNPAAQMAVLRAAYTNAGMQPSEVDYVEAHGTGTLLGDPIEARALGTVLGRGRPEDSPLLIGSVKTNLGHTEAAAGIAGFIKTVLAVQHGQIPPNQHFETANPHIPFTDLRMKVVDTQTEWPATGHPRRAGVSSFGFGGTNAHVVIEQGQEVRPAPGQGLSPAVSTLVVAGKTMQRVSATAGMLADWMEGPGADVALADVAHTLNHHRSRQPKFGTVVARDRTQAIAGLRALAAGQHAPGVVNPADGSPGPGTVFVYSGRGSQWAGMGRQLLADEPAFAAAVAELEPVFVEQAGFSLHDVLANGEELVGIEQIQLGLIGMQLALTELWCSYGVRPDLVIGHSMGEVAAAVVAGALTPAEGLRVTATRSRLMAPLSGQGGMALLELDAPTTEALIADFPQVTLGIYNSPRQTVIAGPTEQIDELIARVRAQNRFASRVNIEVAPHNPAMDALQPAMRSELADLTPRTPTIGIISTTYADLHTQPVFDAEHWATNMRNPVRFQQAIASAGSGADGAYHTFIEISAHPLLTQAIIDTLHSAQPGARYTSLGTLQRDTDDVVTFRTNLNKAHTIHPPHTPHPPEPHPPIPTTPWQHTRHWITTKYPAGSVGSAPRAGTLLGQHTTVATVSASPPSHLWQARLAPDAKPYQGGHRFHQVEVVPASVVLHTILSAATELGYSALSEVRFEQPIFADRPRLIQVVADNRAISLASSPAAGTPSDRWTRHVTAQLSSSPSDSASSLNEHHRANGQPPERAHRDLIPDLAELLAMRGIDGLPFSWTVASWTQHSSNLTVAIDLPEALPEGSTGPLLDAAVHLAALSDVADSRLYVPASIEQISLGDVVTGPRSSVTLNRTAHDDDGITVDVTVAAHGEVPSLSMRSLRYRALDFGLDVGRAQPPASTGPVEAYCDATNFVHTIDWQPQTVPDATHPGAEQVTHPGPVAIIGDDGAALCETLEGAGYQPAVMSDGVSQARYVVYVADSDPAGADETDVDFAVRICTEITGLVRTLAERDADKPAALWILTRGVHESVAPSALRQSFLWGLAGVIAAEHPELWGGLVDLAINDDLGEFGPALAELLAKPSKSILVRRDGVVLAPALAPVRGEPARKSLQCRPDAAYLITGGLGALGLLMADWLADRGAHRLVLTGRTPLPPRRDWQLDTLDTELRRRIDAIRALEMRGVTVEAVAADVGCREDVQALLAARDRDGAAPIRGIIHAAGITNDQLVTSMTGDAVRQVMWPKIGGSQVLHDAFPPGSVDFFYLTASAAGIFGIPGQGSYAAANSYLDALARARRQQGCHTMSLDWVAWRGLGLAADAQLVSEELARMGSRDITPSEAFTAWEFVDGYDVAQAVVVPMPAPAGADGSGANAYLLPARNWSVMAATEVRSELEQGLRRIIAAELRVPEKELDTDRPFAELGLNSLMAMAIRREAEQFVGIELSATMLFNHPTVKSLASYLAKRVAPHDVSQDNQISALSSSAGSVLDSLFDRIESAPPEAERSV