UniProtKB - Q8J0F5 (MLCB_PENCI)
Protein
Compactin diketide synthase mlcB
Gene
mlcB
Organism
Penicillium citrinum
Status
Functioni
Diketide synthase; part of the gene cluster that mediates the biosynthesis of compactin, also known as mevastatin or ML-236B, and which acts as a potent competitive inhibitor of HMG-CoA reductase (PubMed:12172803, PubMed:12242508). Compactin biosynthesis is performed in two stages (PubMed:12172803). The first stage is catalyzed by the nonaketide synthase mlcA, which belongs to type I polyketide synthases and catalyzes the iterative nine-step formation of the polyketide (PubMed:12172803). This PKS stage is completed by the action of dehydrogenase mlcG, which catalyzes the NADPH-dependent reduction of the unsaturated tetra-, penta- and heptaketide intermediates that arise during the mlcA-mediated biosynthesis of the nonaketide chain and leads to dihydro-ML-236C carboxylate (PubMed:12172803). Covalently bound dihydro-ML-236C carboxylate is released from mlcA by the mlcF esterase (PubMed:12172803). Conversion of dihydro-ML-236C carboxylate into ML-236A carboxylate is subsequently performed with the participation of molecular oxygen and P450 monoogygenase mlcC (PubMed:12172803). Finally, mlcH performs the conversion of ML-236A carboxylate to ML-236B/compactin carboxylate through the addition of the side-chain diketide moiety produced by the diketide synthase mlcB (PubMed:12172803).2 Publications
Catalytic activityi
- 3 H+ + holo-[2-methylbutanoate polyketide synthase] + 2 malonyl-CoA + 2 NADPH + S-adenosyl-L-methionine = (S)-2-methylbutanoyl-[2-methylbutanoate polyketide synthase] + 2 CO2 + 2 CoA + H2O + 2 NADP+ + S-adenosyl-L-homocysteine1 PublicationEC:2.3.1.2441 Publication
Cofactori
pantetheine 4'-phosphateBy similarityNote: Binds 1 phosphopantetheine covalently.By similarity
: Polyketide biosynthesis Pathwayi
This protein is involved in Polyketide biosynthesis.CuratedView all proteins of this organism that are known to be involved in Polyketide biosynthesis.
Sites
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Active sitei | 202 | For beta-ketoacyl synthase activityPROSITE-ProRule annotation | 1 | |
Active sitei | 658 | For malonyltransferase activityPROSITE-ProRule annotation | 1 | |
Active sitei | 998 | For beta-hydroxyacyl dehydratase activityPROSITE-ProRule annotation | 1 |
GO - Molecular functioni
- 3-oxoacyl-[acyl-carrier-protein] synthase activity Source: InterPro
- methyltransferase activity Source: UniProtKB-KW
- oxidoreductase activity Source: UniProtKB-KW
- phosphopantetheine binding Source: InterPro
GO - Biological processi
- fatty acid biosynthetic process Source: InterPro
- methylation Source: UniProtKB-KW
Keywordsi
Molecular function | Acyltransferase, Methyltransferase, Multifunctional enzyme, Oxidoreductase, Transferase |
Ligand | NADP, S-adenosyl-L-methionine |
Names & Taxonomyi
Protein namesi | Recommended name: Compactin diketide synthase mlcB1 Publication (EC:2.3.1.2441 Publication)Alternative name(s): Compactin biosynthesis protein B1 Publication |
Gene namesi | Name:mlcB |
Organismi | Penicillium citrinum |
Taxonomic identifieri | 5077 [NCBI] |
Taxonomic lineagei | Eukaryota › Fungi › Dikarya › Ascomycota › Pezizomycotina › Eurotiomycetes › Eurotiomycetidae › Eurotiales › Aspergillaceae › Penicillium |
Pathology & Biotechi
Biotechnological usei
Compactin (also known as mevastatin or ML-236B) and the intermediary metabolites Ml-236C and ML-236A are inhibitors of HMG-CoA reductase involved in cholesterogenesis (PubMed:1010803). Their hypocholesterolemic activity might be useful for lowering cholesterol levels in the blood and reduce artherosclerosis and coronary heart disease (PubMed:1010803).1 Publication
Disruption phenotypei
Impairs the production of compactin and leads to the accumulation of the ML-236A intermediate (PubMed:12172803).1 Publication
PTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_0000436282 | 1 – 2563 | Compactin diketide synthase mlcBAdd BLAST | 2563 |
Amino acid modifications
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Modified residuei | 2522 | O-(pantetheine 4'-phosphoryl)serinePROSITE-ProRule annotation | 1 |
Keywords - PTMi
Phosphopantetheine, PhosphoproteinExpressioni
Inductioni
Family & Domainsi
Domains and Repeats
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Domaini | 2485 – 2562 | CarrierPROSITE-ProRule annotationAdd BLAST | 78 |
Region
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Regioni | 22 – 452 | Beta-ketoacyl synthaseBy similarityAdd BLAST | 431 | |
Regioni | 568 – 915 | Acyl and malonyl transferaseBy similarityAdd BLAST | 348 | |
Regioni | 998 – 1010 | Dehydratase-likeBy similarityAdd BLAST | 13 | |
Regioni | 1542 – 1579 | MethyltransferaseBy similarityAdd BLAST | 38 |
Family and domain databases
Gene3Di | 1.10.1200.10, 1 hit 3.10.129.110, 1 hit 3.40.366.10, 1 hit 3.40.47.10, 1 hit |
InterProi | View protein in InterPro IPR001227, Ac_transferase_dom_sf IPR036736, ACP-like_sf IPR014043, Acyl_transferase IPR016035, Acyl_Trfase/lysoPLipase IPR013149, ADH_C IPR011032, GroES-like_sf IPR018201, Ketoacyl_synth_AS IPR014031, Ketoacyl_synth_C IPR014030, Ketoacyl_synth_N IPR016036, Malonyl_transacylase_ACP-bd IPR013217, Methyltransf_12 IPR036291, NAD(P)-bd_dom_sf IPR032821, PKS_assoc IPR020841, PKS_Beta-ketoAc_synthase_dom IPR020807, PKS_dehydratase IPR042104, PKS_dehydratase_sf IPR020843, PKS_ER IPR013968, PKS_KR IPR020806, PKS_PP-bd IPR009081, PP-bd_ACP IPR006162, Ppantetheine_attach_site IPR029063, SAM-dependent_MTases IPR016039, Thiolase-like |
Pfami | View protein in Pfam PF00698, Acyl_transf_1, 1 hit PF00107, ADH_zinc_N, 1 hit PF16197, KAsynt_C_assoc, 1 hit PF00109, ketoacyl-synt, 1 hit PF02801, Ketoacyl-synt_C, 1 hit PF08659, KR, 1 hit PF08242, Methyltransf_12, 1 hit PF00550, PP-binding, 1 hit PF14765, PS-DH, 1 hit |
SMARTi | View protein in SMART SM00827, PKS_AT, 1 hit SM00826, PKS_DH, 1 hit SM00829, PKS_ER, 1 hit SM00825, PKS_KS, 1 hit SM00823, PKS_PP, 1 hit |
SUPFAMi | SSF47336, SSF47336, 1 hit SSF50129, SSF50129, 1 hit SSF51735, SSF51735, 2 hits SSF52151, SSF52151, 1 hit SSF53335, SSF53335, 1 hit SSF53901, SSF53901, 1 hit SSF55048, SSF55048, 1 hit |
PROSITEi | View protein in PROSITE PS00606, B_KETOACYL_SYNTHASE, 1 hit PS50075, CARRIER, 1 hit PS00012, PHOSPHOPANTETHEINE, 1 hit |
i Sequence
Sequence statusi: Complete.
Q8J0F5-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
MNNTPAVTAT ATATATATAM AGSACSNTST PIAIVGMGCR FAGDATSPQK
60 70 80 90 100
LWEMVERGGS AWSKVPSSRF NVRGVYHPNG ERVGSTHVKG GHFIDEDPAL
110 120 130 140 150
FDAAFFNMTT EVASCMDPQY RLMLEVVYES LESAGITIDG MAGSNTSVFG
160 170 180 190 200
GVMYHDYQDS LNRDPETVPR YFITGNSGTM LSNRISHFYD LRGPSVTVDT
210 220 230 240 250
ACSTTLTALH LACQSLRTGE SDTAIVIGAN LLLNPDVFVT MSNLGFLSPD
260 270 280 290 300
GISYSFDPRA NGYGRGEGIA ALVIKALPNA LRDQDPIRAV IRETALNQDG
310 320 330 340 350
KTPAITAPSD VAQKSLIQEC YDKAGLDMSL TSYVEAHGTG TPTGDPLEIS
360 370 380 390 400
AISAAFKGHP LHLGSVKANI GHTEAASGLA SIIKVALALE KGLIPPNARF
410 420 430 440 450
LQKNSKLMLD QKNIKIPMSA QDWPVKDGTR RASVNNFGFG GSNAHVILES
460 470 480 490 500
YDRASLALPE DQVHVNGNSE HGRVEDGSKQ SRIYVVRAKD EQACRRTIAS
510 520 530 540 550
LRDYIKSVAD IDGEPFLASL AYTLGSRRSI LPWTSVYVAD SLGGLVSALS
560 570 580 590 600
DESNQPKRAN EKVRLGFVFT GQGAQWHAMG RELVNTFPVF KQAILECDGY
610 620 630 640 650
IKQLGASWNF MEELHRDELT TRVNDAEYSL PLSTAIQIAL VRLLWSWGIR
660 670 680 690 700
PTGITSHSSG EAAAAYAAGA LSARSAIGIT YIRGVLTTKP KPALAAKGGM
710 720 730 740 750
MAVGLGRSET NVYISRLNQE DGCVVVGCIN SQCSVTVSGD LGAIEKLEKL
760 770 780 790 800
LHADGIFTRK LKVTEAFHSS HMRPMADAFG ASLRDLFNSD NNNDNPNADT
810 820 830 840 850
SKGVLYSSPK TGSRMTDLKL LLDPTHWMDS MLQPVEFESS LREMCFDPNT
860 870 880 890 900
KEKAVDVIIE IGPHGALGGP INQVMQDLGL KGTDINYLSC LSRGRSSLET
910 920 930 940 950
MYRAATELIS KGYGLKMDAI NFPHGRKEPR VKVLSDLPAY PWNHQTRYWR
960 970 980 990 1000
EPRGSRESKQ RTHPPHTLIG SRESLSPQFA PKWKHVLRLS DIPWIRDHVV
1010 1020 1030 1040 1050
GSSIIFPGAG FISMAIEGFS QVCPPVAGAS INYNLRDVEL AQALIIPADA
1060 1070 1080 1090 1100
EAEVDLRLTI RSCEERSLGT KNWHQFSVHS ISGENNTWTE HCTGLIRSES
1110 1120 1130 1140 1150
ERSHLDCSTV EASRRLNLGS DNRSIDPNDL WESLHANGIC HGPIFQNIQR
1160 1170 1180 1190 1200
IQNNGQGSFC RFSIADTASA MPHSYENRHI VHPTTLDSVI QAAYTVLPYA
1210 1220 1230 1240 1250
GTRMKTAMVP RRLRNVKISS SLADLEAGDA LDAQASIKDR NSQSFSTDLA
1260 1270 1280 1290 1300
VFDDYDSGSS PSDGIPVIEI EGLVFQSVGS SFSDQKSDSN DTENACSSWV
1310 1320 1330 1340 1350
WAPDISLGDS TWLKEKLSTE AETKETELMM DLRRCTINFI QEAVTDLTNS
1360 1370 1380 1390 1400
DIQHLDGHLQ KYFDWMNVQL DLARQNKLSP ASCDWLSDDA EQKKCLQARV
1410 1420 1430 1440 1450
AGESVNGEMI SRLGPQLIAM LRRETEPLEL MMQDQLLSRY YVNAIKWSRS
1460 1470 1480 1490 1500
NAQASELIRL CAHKNPRSRI LEIGGGTGGC TKLIVNALGN TKPIDRYDFT
1510 1520 1530 1540 1550
DVSAGFFESA REQFADWQDV MTFKKLDIES DPEQQGFECA TYDVVVACQV
1560 1570 1580 1590 1600
LHATRCMKRT LSNVRKLLKP GGNLILVETT RDQLDLFFTF GLLPGWWLSE
1610 1620 1630 1640 1650
EPERKSTPSL TTDLWNTMLD TSGFNGVELE VRDCEDDEFY MISTMLSTAR
1660 1670 1680 1690 1700
KENTTPDTVA ESEVLLLHGA LRPPSSWLES LQAAICEKTS SSPSINALGE
1710 1720 1730 1740 1750
VDTTGRTCIF LGEMESSLLG EVGSETFKSI TAMLNNCNAL LWVSRGAAMS
1760 1770 1780 1790 1800
SEDPWKALHI GLLRTIRNEN NGKEYVSLDL DPSRNAYTHE SLYAICNIFN
1810 1820 1830 1840 1850
GRLGDLSEDK EFEFAERNGV IHVPRLFNDP HWKDQEAVEV TLQPFEQPGR
1860 1870 1880 1890 1900
RLRMEVETPG LLDSLQFRDD EGREGKDLPD DWVEIEPKAF GLNFRDVMVA
1910 1920 1930 1940 1950
MGQLEANRVM GFECAGVITK LGGAAAASQG LRLGDRVCAL LKGHWATRTQ
1960 1970 1980 1990 2000
TPYTNVVRIP DEMGFPEAAS VPLAFTTAYI ALYTTAKLRR GERVLIHSGA
2010 2020 2030 2040 2050
GGVGQAAIIL SQLAGAEVFV TAGTQAKRDF VGDKFGINPD HIFSSRNDLF
2060 2070 2080 2090 2100
VDGIKAYTGG LGVHVVLNSL AGQLLQASFD CMAEFGRFVE IGKKDLEQNS
2110 2120 2130 2140 2150
RLDMLPFTRD VSFTSIDLLS WQRAKSEEVS EALNHVTKLL ETKAIGLIGP
2160 2170 2180 2190 2200
IQQHSLSNIE KAFRTMQSGQ HVGKVVVNVS GDELVPVGDG GFSLKLKPDS
2210 2220 2230 2240 2250
SYLVAGGLGG IGKQICQWLV DHGAKHLIIL SRSAKASPFI TSLQNQQCAV
2260 2270 2280 2290 2300
YLHACDISDQ DQVTKVLRLC EEAHAPPIRG IIQGAMVLKD ALLSRMTLDE
2310 2320 2330 2340 2350
FNAATRPKVQ GSWYLHKIAQ DVDFFVMLSS LVGVMGGAGQ ANYAAAGAFQ
2360 2370 2380 2390 2400
DALAHHRRAH GMPAVTIDLG MVKSVGYVAE TGRGVADRLA RIGYKPMHEK
2410 2420 2430 2440 2450
DVMDVLEKAI LCSSPQFPSP PAAVVTGINT SPGAHWTEAN WIQEQRFVGL
2460 2470 2480 2490 2500
KYRQVLHADQ SFVSSHKKGP DGVRAQLSRV TSHDEAISIV LKAMTEKLMR
2510 2520 2530 2540 2550
MFGLAEDDMS SSKNLAGVGV DSLVAIELRN WITSEIHVDV SIFELMNGNT
2560
IAGLVELVVA KCS
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AB072893 Genomic DNA Translation: BAC20566.1 |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AB072893 Genomic DNA Translation: BAC20566.1 |
3D structure databases
SMRi | Q8J0F5 |
ModBasei | Search... |
Family and domain databases
Gene3Di | 1.10.1200.10, 1 hit 3.10.129.110, 1 hit 3.40.366.10, 1 hit 3.40.47.10, 1 hit |
InterProi | View protein in InterPro IPR001227, Ac_transferase_dom_sf IPR036736, ACP-like_sf IPR014043, Acyl_transferase IPR016035, Acyl_Trfase/lysoPLipase IPR013149, ADH_C IPR011032, GroES-like_sf IPR018201, Ketoacyl_synth_AS IPR014031, Ketoacyl_synth_C IPR014030, Ketoacyl_synth_N IPR016036, Malonyl_transacylase_ACP-bd IPR013217, Methyltransf_12 IPR036291, NAD(P)-bd_dom_sf IPR032821, PKS_assoc IPR020841, PKS_Beta-ketoAc_synthase_dom IPR020807, PKS_dehydratase IPR042104, PKS_dehydratase_sf IPR020843, PKS_ER IPR013968, PKS_KR IPR020806, PKS_PP-bd IPR009081, PP-bd_ACP IPR006162, Ppantetheine_attach_site IPR029063, SAM-dependent_MTases IPR016039, Thiolase-like |
Pfami | View protein in Pfam PF00698, Acyl_transf_1, 1 hit PF00107, ADH_zinc_N, 1 hit PF16197, KAsynt_C_assoc, 1 hit PF00109, ketoacyl-synt, 1 hit PF02801, Ketoacyl-synt_C, 1 hit PF08659, KR, 1 hit PF08242, Methyltransf_12, 1 hit PF00550, PP-binding, 1 hit PF14765, PS-DH, 1 hit |
SMARTi | View protein in SMART SM00827, PKS_AT, 1 hit SM00826, PKS_DH, 1 hit SM00829, PKS_ER, 1 hit SM00825, PKS_KS, 1 hit SM00823, PKS_PP, 1 hit |
SUPFAMi | SSF47336, SSF47336, 1 hit SSF50129, SSF50129, 1 hit SSF51735, SSF51735, 2 hits SSF52151, SSF52151, 1 hit SSF53335, SSF53335, 1 hit SSF53901, SSF53901, 1 hit SSF55048, SSF55048, 1 hit |
PROSITEi | View protein in PROSITE PS00606, B_KETOACYL_SYNTHASE, 1 hit PS50075, CARRIER, 1 hit PS00012, PHOSPHOPANTETHEINE, 1 hit |
ProtoNeti | Search... |
MobiDBi | Search... |
Entry informationi
Entry namei | MLCB_PENCI | |
Accessioni | Q8J0F5Primary (citable) accession number: Q8J0F5 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | May 11, 2016 |
Last sequence update: | March 1, 2003 | |
Last modified: | December 2, 2020 | |
This is version 106 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Fungal Protein Annotation Program |