Protein: Lovastatin nonaketide synthase, polyketide synthase component (LNKS) (EC 2.3.1.161) (Lovastatin biosynthesis cluster protein B) (Q9Y8A5)
Organism: Aspergillus terreus
Function: Lovastatin nonaketide synthase; part of the gene cluster that mediates the biosynthesis of lovastatin (also known as mevinolin, mevacor or monacolin K), a hypolipidemic inhibitor of (3S)-hydroxymethylglutaryl-coenzyme A (HMG-CoA) reductase (HMGR). The first step in the biosynthesis of lovastatin is the production of dihydromonacolin L acid by the lovastatin nonaketide synthase lovB and the trans-acting enoyl reductase lovC via condensation of one acetyl-CoA unit and 8 malonyl-CoA units. Dihydromonacolin L acid is released from lovB by the thioesterase lovG. Next, dihydromonacolin L acid is oxidized by the dihydromonacolin L monooxygenase lovA twice to form monacolin J acid. The 2-methylbutyrate moiety of lovastatin is synthesized by the lovastatin diketide synthase lovF via condensation of one acetyl-CoA unit and one malonyl-CoA unit. Finally, the covalent attachment of this moiety to monacolin J acid is catalyzed by the transesterase lovD to yield lovastatin. LovD has broad substrate specificity and can also convert monacolin J to simvastatin using alpha-dimethylbutanoyl-S-methyl-3-mercaptopropionate (DMB-S-MMP) as the thioester acyl donor, and can also catalyze the reverse reaction and function as hydrolase in vitro. LovD has much higher activity with LovF-bound 2-methylbutanoate than with free diketide substrates.
Interaction partners:
Sequence:
MAQSMYPNEPIVVVGSGCRFPGDANTPSKLWELLQHPRDVQSRIPKERFDVDTFYHPDGKHHGRTNAPYAYVLQDDLGAFDAAFFNIQAGEAESMDPQHRLLLETVYEAVTNAGMRIQDLQGTSTAVYVGVMTHDYETVSTRDLESIPTYSATGVAVSVASNRISYFFDWHGPSMTIDTACSSSLVAVHLAVQQLRTGQSSMAIAAGANLILGPMTFVLESKLSMLSPSGRSRMWDAGADGYARGEAVCSVVLKTLSQALRDGDTIECVIRETGVNQDGRTTGITMPNHSAQEALIKATYAQAGLDITKAEDRCQFFEAHGTGTPAGDPQEAEAIATAFFGHEQVARSDGNERAPLFVGSAKTVVGHTEGTAGLAGLMKASFAVRHGVIPPNLLFDKISPRVAPFYKNLRIPTEATQWPALPPGQPRRASVNSFGFGGTNAHAIIEEYMEPEQNQLRVSNNEDCPPMTGVLSLPLVLSAKSQRSLKIMMEEMLQFLQSHPEIHLHDLTWSLLRKRSVLPFRRAIVGHSHETIRRALEDAIEDGIVSSDFTTEVRGQPSVLGIFTGQGAQWPGMLKNLIEASPYVRNIVRELDDSLQSLPEKYRPSWTLLDQFMLEGEASNVQYATFSQPLCCAVQIVLVRLLEAARIRFTAVVGHSSGEIACAFAAGLISASLAIRIAYLRGVVSAGGARGTPGAMLAAGMSFEEAQEICELDAFEGRICVAASNSPDSVTFSGDANAIDHLKGMLEDESTFARLLKVDTAYHSHHMLPCADPYMQALEECGCAVADAGSPAGSVPWYSSVDAENRQMAARDVTAKYWKDNLVSPVLFSHAVQRAVVTHKALDIGIEVGCHPALKSPCVATIKDVLSGVDLAYTGCLERGKNDLDSFSRALAYLWERFGASSFDADEFMRAVAPDRPCMSVSKLLPAYPWDRSRRYWVESRATRHHLRGPKPHLLLGKLSEYSTPLSFQWLNFVRPRDIEWLDGHALQGQTVFPAAGYIVMAMEAALMIAGTHAKQVKLLEILDMSIDKAVIFDDEDSLVELNLTADVSRNAGEAGSMTISFKIDSCLSKEGNLSLSAKGQLALTIEDVNPRTTSASDQHHLPPPEEEHPHMNRVNINAFYHELGLMGYNYSKDFRRLHNMQRADLRASGTLDFIPLMDEGNGCPLLLHPASLDVAFQTVIGAYSSPGDRRLRCLYVPTHVDRITLVPSLCLATAESGCEKVAFNTINTYDKGDYLSGDIVVFDAEQTTLFQVENITFKPFSPPDASTDHAMFARWSWGPLTPDSLLDNPEYWATAQDKEAIPIIERIVYFYIRSFLSQLTLEERQQAAFHLQKQIEWLEQVLASAKEGRHLWYDPGWENDTEAQIEHLCTANSYHPHVRLVQRVGQHLLPTVRSNGNPFDLLDHDGLLTEFYTNTLSFGPALHYARELVAQIAHRYQSMDILEIGAGTGGATKYVLATPQLGFNSYTYTDISTGFFEQAREQFAPFEDRMVFEPLDIRRSPAEQGFEPHAYDLIIASNVLHATPDLEKTMAHARSLLKPGGQMVILEITHKEHTRLGFIFGLFADWWAGVDDGRCTEPFVSFDRWDAILKRVGFSGVDSRTTDRDANLFPTSVFSTHAIDATVEYLDAPLASSGTVKDSYPPLVVVGGQTPQSQRLLNDIKAIMPPRPLQTYKRLVDLLDAEELPMKSTFVMLTELDEELFAGLTEETFEATKLLLTYASNTVWLTENAWVQHPHQASTIGMLRSIRREHPDLGVHVLDVDAVETFDATFLVEQVLRLEEHTDELASSTTWTQEPEVSWCKGRPWIPRLKRDLARNNRMNSSRRPIYEMIDSSRAPVALQTARDSSSYFLESAETWFVPESVQQMETKTIYVHFSCPHALRVGQLGFFYLVQGHVQEGNREVPVVALAERNASIVHVRPDYIYTEADNNLSEGGGSLMVTVLAAAVLAETVISTAKCLGVTDSILVLNPPSICGQMLLHAGEEIGLQVHLATTSGNRSSVSAGDAKSWLTLHARDTDWHLRRVLPRGVQALVDLSADQSCEGLTQRMMKVLMPGCAHYRAADLFTDTVSTELHSGSRHQASLPAAYWEHVVSLARQGLPSVSEGWEVMPCTQFAAHADKTRPDLSTVISWPRESDEATLPTRVRSIDAETLFAADKTYLLVGLTGDLGRSLGRWMVQHGACHIVLTSRNPQVNPKWLAHVEELGGRVTVLSMDVTSQNSVEAGLAKLKDLHLPPVGGIAFGPLVLQDVMLNNMELPMMEMVLNPKVEGVRILHEKFSDPTSSNPLDFFVMFSSIVAVMGNPGQANYSAANCYLQALAQQRVASGLAASTIDIGAVYGVGFVTRAELEEDFNAIRFMFDSVEEHELHTLFAEAVVAGRRAVHQQEQQRKFATVLDMADLELTTGIPPLDPALKDRITFFDDPRIGNLKIPEYRGAKAGEGAAGSKGSVKEQLLQATNLDQVRQIVIDGLSAKLQVTLQIPDGESVHPTIPLIDQGVDSLGAVTVGTWFSKQLYLDLPLLKVLGGASITDLANEAAARLPPSSIPLVAATDGGAESTDNTSENEVSGREDTDLSAAATITEPSSADEDDTEPGDEDVPRSHHPLSLGQEYSWRIQQGAEDPTVFNNTIGMFMKGSIDLKRLYKALRAVLRRHEIFRTGFANVDENGMAQLVFGQTKNKVQTIQVSDRAGAEEGYRQLVQTRYNPAAGDTLRLVDFFWGQDDHLLVVAYHRLVGDGSTTENIFVEAGQLYDGTSLSPHVPQFADLAARQRAMLEDGRMEEDLAYWKKMHYRPSSIPVLPLMRPLVGNSSRSDTPNFQHCGPWQQHEAVARLDPMVAFRIKERSRKHKATPMQFYLAAYQVLLARLTDSTDLTVGLADTNRATVDEMAAMGFFANLLPLRFRDFRPHITFGEHLIATRDLVREALQHARVPYGVLLDQLGLEVPVPTSNQPAPLFQAVFDYKQGQAESGTIGGAKITEVIATRERTPYDVVLEMSDDPTKDPLLTAKLQSSRYEAHHPQAFLESYMSLLSMFSMNPALKLA