STCN_EMENI
ID STCN_EMENI Reviewed; 639 AA.
AC C8VDT4; Q5AV68;
DT 25-MAY-2022, integrated into UniProtKB/Swiss-Prot.
DT 03-NOV-2009, sequence version 1.
DT 03-AUG-2022, entry version 63.
DE RecName: Full=Versicolorin B synthase stcN {ECO:0000250|UniProtKB:Q12062};
DE EC=4.2.1.143 {ECO:0000250|UniProtKB:Q12062};
DE AltName: Full=5'-oxoaverantin cyclase stcN {ECO:0000250|UniProtKB:Q12062};
DE EC=4.2.1.142 {ECO:0000250|UniProtKB:Q12062};
DE AltName: Full=Sterigmatocystin biosynthesis cluster protein N {ECO:0000303|PubMed:8643646};
DE Flags: Precursor;
GN Name=stcN {ECO:0000303|PubMed:8643646}; ORFNames=AN7812, ANIA_07812;
OS Emericella nidulans (strain FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 /
OS M139) (Aspergillus nidulans).
OC Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Eurotiomycetes;
OC Eurotiomycetidae; Eurotiales; Aspergillaceae; Aspergillus;
OC Aspergillus subgen. Nidulantes.
OX NCBI_TaxID=227321;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 / M139;
RX PubMed=16372000; DOI=10.1038/nature04341;
RA Galagan J.E., Calvo S.E., Cuomo C., Ma L.-J., Wortman J.R., Batzoglou S.,
RA Lee S.-I., Bastuerkmen M., Spevak C.C., Clutterbuck J., Kapitonov V.,
RA Jurka J., Scazzocchio C., Farman M.L., Butler J., Purcell S., Harris S.,
RA Braus G.H., Draht O., Busch S., D'Enfert C., Bouchier C., Goldman G.H.,
RA Bell-Pedersen D., Griffiths-Jones S., Doonan J.H., Yu J., Vienken K.,
RA Pain A., Freitag M., Selker E.U., Archer D.B., Penalva M.A., Oakley B.R.,
RA Momany M., Tanaka T., Kumagai T., Asai K., Machida M., Nierman W.C.,
RA Denning D.W., Caddick M.X., Hynes M., Paoletti M., Fischer R., Miller B.L.,
RA Dyer P.S., Sachs M.S., Osmani S.A., Birren B.W.;
RT "Sequencing of Aspergillus nidulans and comparative analysis with A.
RT fumigatus and A. oryzae.";
RL Nature 438:1105-1115(2005).
RN [2]
RP GENOME REANNOTATION.
RC STRAIN=FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 / M139;
RX PubMed=19146970; DOI=10.1016/j.fgb.2008.12.003;
RA Wortman J.R., Gilsenan J.M., Joardar V., Deegan J., Clutterbuck J.,
RA Andersen M.R., Archer D., Bencina M., Braus G., Coutinho P., von Dohren H.,
RA Doonan J., Driessen A.J., Durek P., Espeso E., Fekete E., Flipphi M.,
RA Estrada C.G., Geysens S., Goldman G., de Groot P.W., Hansen K.,
RA Harris S.D., Heinekamp T., Helmstaedt K., Henrissat B., Hofmann G.,
RA Homan T., Horio T., Horiuchi H., James S., Jones M., Karaffa L.,
RA Karanyi Z., Kato M., Keller N., Kelly D.E., Kiel J.A., Kim J.M.,
RA van der Klei I.J., Klis F.M., Kovalchuk A., Krasevec N., Kubicek C.P.,
RA Liu B., Maccabe A., Meyer V., Mirabito P., Miskei M., Mos M., Mullins J.,
RA Nelson D.R., Nielsen J., Oakley B.R., Osmani S.A., Pakula T., Paszewski A.,
RA Paulsen I., Pilsyk S., Pocsi I., Punt P.J., Ram A.F., Ren Q., Robellet X.,
RA Robson G., Seiboth B., van Solingen P., Specht T., Sun J.,
RA Taheri-Talesh N., Takeshita N., Ussery D., vanKuyk P.A., Visser H.,
RA van de Vondervoort P.J., de Vries R.P., Walton J., Xiang X., Xiong Y.,
RA Zeng A.P., Brandt B.W., Cornell M.J., van den Hondel C.A., Visser J.,
RA Oliver S.G., Turner G.;
RT "The 2008 update of the Aspergillus nidulans genome annotation: a community
RT effort.";
RL Fungal Genet. Biol. 46:S2-13(2009).
RN [3]
RP FUNCTION, AND INDUCTION.
RX PubMed=8017929; DOI=10.1128/aem.60.5.1444-1450.1994;
RA Keller N.P., Kantz N.J., Adams T.H.;
RT "Aspergillus nidulans verA is required for production of the mycotoxin
RT sterigmatocystin.";
RL Appl. Environ. Microbiol. 60:1444-1450(1994).
RN [4]
RP FUNCTION.
RX PubMed=7486998; DOI=10.1128/aem.61.10.3628-3632.1995;
RA Keller N.P., Segner S., Bhatnagar D., Adams T.H.;
RT "StcS, a putative P-450 monooxygenase, is required for the conversion of
RT versicolorin A to sterigmatocystin in Aspergillus nidulans.";
RL Appl. Environ. Microbiol. 61:3628-3632(1995).
RN [5]
RP FUNCTION.
RC STRAIN=FGSC A4 / ATCC 38163 / CBS 112.46 / NRRL 194 / M139;
RX PubMed=7642507; DOI=10.1128/jb.177.16.4792-4800.1995;
RA Yu J.-H., Leonard T.J.;
RT "Sterigmatocystin biosynthesis in Aspergillus nidulans requires a novel
RT type I polyketide synthase.";
RL J. Bacteriol. 177:4792-4800(1995).
RN [6]
RP FUNCTION.
RX PubMed=8900026; DOI=10.1128/aem.62.11.4296-4298.1996;
RA Kelkar H.S., Keller N.P., Adams T.H.;
RT "Aspergillus nidulans stcP encodes an O-methyltransferase that is required
RT for sterigmatocystin biosynthesis.";
RL Appl. Environ. Microbiol. 62:4296-4298(1996).
RN [7]
RP FUNCTION.
RX PubMed=8962148; DOI=10.1073/pnas.93.25.14873;
RA Brown D.W., Adams T.H., Keller N.P.;
RT "Aspergillus has distinct fatty acid synthases for primary and secondary
RT metabolism.";
RL Proc. Natl. Acad. Sci. U.S.A. 93:14873-14877(1996).
RN [8]
RP INDUCTION, FUNCTION, AND PATHWAY.
RX PubMed=8643646; DOI=10.1073/pnas.93.4.1418;
RA Brown D.W., Yu J.-H., Kelkar H.S., Fernandes M., Nesbitt T.C., Keller N.P.,
RA Adams T.H., Leonard T.J.;
RT "Twenty-five coregulated transcripts define a sterigmatocystin gene cluster
RT in Aspergillus nidulans.";
RL Proc. Natl. Acad. Sci. U.S.A. 93:1418-1422(1996).
RN [9]
RP FUNCTION.
RX PubMed=8999832; DOI=10.1074/jbc.272.3.1589;
RA Kelkar H.S., Skloss T.W., Haw J.F., Keller N.P., Adams T.H.;
RT "Aspergillus nidulans stcL encodes a putative cytochrome P-450
RT monooxygenase required for bisfuran desaturation during
RT aflatoxin/sterigmatocystin biosynthesis.";
RL J. Biol. Chem. 272:1589-1594(1997).
RN [10]
RP FUNCTION.
RX PubMed=10618248; DOI=10.1128/aem.66.1.359-362.2000;
RA Keller N.P., Watanabe C.M., Kelkar H.S., Adams T.H., Townsend C.A.;
RT "Requirement of monooxygenase-mediated steps for sterigmatocystin
RT biosynthesis by Aspergillus nidulans.";
RL Appl. Environ. Microbiol. 66:359-362(2000).
RN [11]
RP REVIEW ON STERIGMATOCYSTIN BIOSYNTHESIS.
RX PubMed=24957370; DOI=10.3390/metabo2010100;
RA Klejnstrup M.L., Frandsen R.J., Holm D.K., Nielsen M.T., Mortensen U.H.,
RA Larsen T.O., Nielsen J.B.;
RT "Genetics of polyketide metabolism in Aspergillus nidulans.";
RL Metabolites 2:100-133(2012).
CC -!- FUNCTION: Norsolorinic acid reductase; part of the gene cluster that
CC mediates the biosynthesis of sterigmatocystin (ST), a polyketide-
CC derived furanocoumarin which is part of the most toxic and carcinogenic
CC compounds among the known mycotoxins (PubMed:8643646). The first step
CC in the biosynthesis of sterigmatocystin is the production of hexanoate
CC by the fatty acid synthase (FAS) units stcJ and stcK (PubMed:8962148).
CC The polyketide backbone is assembled by the non-reducing polyketide
CC synthase stcA by condensation of the starter hexanoyl-CoA and 7
CC malonyl-CoA extender units followed by cyclization and release of
CC norsolorinic acid (By similarity). Norsolorinic acid is the first
CC stable intermediate in the biosynthesis of sterigmatocystin and is
CC converted into averantin (AVN) by the ketoreductase stcE which reduces
CC the hexanoate ketone to an alcohol (PubMed:8643646) (Probable).
CC Averantin is then oxidized into 5'-hydroxyaverantin (HAVN) by the
CC cytochrome P450 monooxygenase stcF (PubMed:10618248). 5'-
CC hydroxyaverantin is further converted to 5'-oxyaverantin (OAVN) by the
CC 5'-hydroxyaverantin dehydrogenase stcG (PubMed:24957370). The next step
CC is the conversion of OAVN into averufin (AVF) which is catalyzed by a
CC yet to be identified enzyme (PubMed:24957370). The cytochrome P450
CC monoxygenase stcB and the flavin-binding monooxygenase stcW are both
CC required for the conversion of averufin to 1-hydroxyversicolorone
CC (PubMed:10618248). The esterase stcI probably catalyzes the formation
CC of versiconal hemiacetal acetate from 1-hydroxyversicolorone
CC (PubMed:24957370). The oxydoreductase stcN then probably catalyzes the
CC biosynthetic step from versiconal to versicolorin B (VERB)
CC (PubMed:24957370). The next step is performed by the versicolorin B
CC desaturase stcL to produce versicolorin A (VERA) (PubMed:8999832). The
CC ketoreductase stcU and the cytochrome P450 monooxygenase stcS are
CC involved in the conversion of versicolorin A to
CC demethylsterigmatocystin (PubMed:7486998). The Baeyer-Villiger oxidas
CC stcQ and the reductase stcR might be involved in the biosynthetic step
CC from versicolorin A to demethylsterigmatocystin (PubMed:24957370). The
CC final step in the biosynthesis of sterigmatocystin is the methylation
CC of demethylsterigmatocystin catalyzed by the methyltransferase stcP
CC (PubMed:8900026). {ECO:0000250|UniProtKB:Q12053,
CC ECO:0000269|PubMed:10618248, ECO:0000269|PubMed:7486998,
CC ECO:0000269|PubMed:8643646, ECO:0000269|PubMed:8900026,
CC ECO:0000269|PubMed:8962148, ECO:0000269|PubMed:8999832,
CC ECO:0000303|PubMed:24957370, ECO:0000305|PubMed:8643646}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=(2S-3S)-versiconal hemiacetal = H2O + versicolorin B;
CC Xref=Rhea:RHEA:33859, ChEBI:CHEBI:15377, ChEBI:CHEBI:77950,
CC ChEBI:CHEBI:77951; EC=4.2.1.143;
CC Evidence={ECO:0000250|UniProtKB:Q12062};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=(S)-5'-oxoaverantin + H(+) = (1'S,5'S)-averufin + H2O;
CC Xref=Rhea:RHEA:35671, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:71537, ChEBI:CHEBI:77933; EC=4.2.1.142;
CC Evidence={ECO:0000250|UniProtKB:Q12062};
CC -!- COFACTOR:
CC Name=FAD; Xref=ChEBI:CHEBI:57692;
CC Evidence={ECO:0000250|UniProtKB:E4QP00};
CC -!- PATHWAY: Mycotoxin biosynthesis; sterigmatocystin biosynthesis.
CC {ECO:0000269|PubMed:8643646}.
CC -!- SUBUNIT: Homodimer. {ECO:0000250|UniProtKB:Q12062}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm, cytosol
CC {ECO:0000250|UniProtKB:Q12062}.
CC -!- INDUCTION: The genes forming the sterigmatocystin biosynthesis cluster
CC are co-regulated and induced on oatmeal porridge or the fungal isolates
CC were grown either on oatmeal porridge or in YEC medium (0.2% yeast
CC extract, 5.0% corn steep liquor). {ECO:0000269|PubMed:8017929,
CC ECO:0000269|PubMed:8643646}.
CC -!- SIMILARITY: Belongs to the GMC oxidoreductase family. {ECO:0000305}.
CC -!- SEQUENCE CAUTION:
CC Sequence=EAA61600.1; Type=Erroneous gene model prediction; Evidence={ECO:0000305};
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DR EMBL; AACD01000132; EAA61600.1; ALT_SEQ; Genomic_DNA.
DR EMBL; BN001304; CBF80156.1; -; Genomic_DNA.
DR RefSeq; XP_681081.1; XM_675989.1.
DR STRING; 162425.CADANIAP00000953; -.
DR CAZy; AA3; Auxiliary Activities 3.
DR EnsemblFungi; CBF80156; CBF80156; ANIA_07812.
DR GeneID; 2869564; -.
DR KEGG; ani:AN7812.2; -.
DR VEuPathDB; FungiDB:AN7812; -.
DR eggNOG; KOG1238; Eukaryota.
DR HOGENOM; CLU_002865_6_3_1; -.
DR InParanoid; C8VDT4; -.
DR OMA; REMFYMQ; -.
DR OrthoDB; 798314at2759; -.
DR UniPathway; UPA00377; -.
DR Proteomes; UP000000560; Chromosome IV.
DR Proteomes; UP000005890; Unassembled WGS sequence.
DR GO; GO:0005829; C:cytosol; IEA:UniProtKB-SubCell.
DR GO; GO:0050660; F:flavin adenine dinucleotide binding; IEA:InterPro.
DR GO; GO:0016829; F:lyase activity; IEA:UniProtKB-KW.
DR GO; GO:0016491; F:oxidoreductase activity; IBA:GO_Central.
DR GO; GO:0016614; F:oxidoreductase activity, acting on CH-OH group of donors; IEA:InterPro.
DR GO; GO:0044550; P:secondary metabolite biosynthetic process; IBA:GO_Central.
DR GO; GO:0045461; P:sterigmatocystin biosynthetic process; IEP:GO_Central.
DR Gene3D; 3.50.50.60; -; 1.
DR InterPro; IPR036188; FAD/NAD-bd_sf.
DR InterPro; IPR012132; GMC_OxRdtase.
DR InterPro; IPR000172; GMC_OxRdtase_N.
DR InterPro; IPR007867; GMC_OxRtase_C.
DR InterPro; IPR000014; PAS.
DR PANTHER; PTHR11552; PTHR11552; 1.
DR Pfam; PF05199; GMC_oxred_C; 1.
DR Pfam; PF00732; GMC_oxred_N; 1.
DR PIRSF; PIRSF000137; Alcohol_oxidase; 1.
DR SUPFAM; SSF51905; SSF51905; 1.
DR PROSITE; PS50112; PAS; 1.
PE 2: Evidence at transcript level;
KW Cytoplasm; FAD; Flavoprotein; Glycoprotein; Lyase; Reference proteome;
KW Signal.
FT SIGNAL 1..19
FT /evidence="ECO:0000255"
FT CHAIN 20..639
FT /note="Versicolorin B synthase stcN"
FT /id="PRO_5002993113"
FT DOMAIN 263..301
FT /note="PAS"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00140"
FT BINDING 77..78
FT /ligand="FAD"
FT /ligand_id="ChEBI:CHEBI:57692"
FT /evidence="ECO:0000250|UniProtKB:E4QP00"
FT BINDING 98..99
FT /ligand="FAD"
FT /ligand_id="ChEBI:CHEBI:57692"
FT /evidence="ECO:0000250|UniProtKB:E4QP00"
FT BINDING 164..167
FT /ligand="FAD"
FT /ligand_id="ChEBI:CHEBI:57692"
FT /evidence="ECO:0000250|UniProtKB:E4QP00"
FT BINDING 609
FT /ligand="FAD"
FT /ligand_id="ChEBI:CHEBI:57692"
FT /evidence="ECO:0000250|UniProtKB:E4QP00"
FT BINDING 620..621
FT /ligand="FAD"
FT /ligand_id="ChEBI:CHEBI:57692"
FT /evidence="ECO:0000250|UniProtKB:E4QP00"
FT CARBOHYD 109
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00498"
FT CARBOHYD 214
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00498"
FT CARBOHYD 444
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00498"
FT CARBOHYD 501
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00498"
SQ SEQUENCE 639 AA; 69851 MW; 4305D1AC2DD52622 CRC64;
MPAWSLLVLS ALPVVGMFAG QTTFFSSPWE TLFGTAAEQH EAAMDGRIQG RGLLSSHFGW
YGWPGQTFDY VIVGGGTAGL AMAHRLSEDG SNSVAVIEAG GFYEIEAGNA TEVPMFLFNY
FFDNGHVKNP LFDWYQYTEA QPGLAGRKMF YMQGKTLGGS TARGAMLYHR GSKGAYQLWA
DRVGDDSYTW DNWLPFFKKS VQFSGPLTNP RPANATASND VSAFAATAEE EGPVQVAYPY
LTNAISSWVD KALEKMGFPE AQGFSNGQLL GRSYITHTIH PKTRRRDTAS TSYLQTALRT
SNSLNVITHT LVKKIDFDEE KRATGVVVNT GGFEWQIGAK KEVILSAGVM RSPQLLMVSG
LGPRETLEKL DIPVLSDLPG VGQNMQDTII LGPTNPVKVE SHSQLMGSKE TLPRSIYEYN
NFRTGLLTNP GQDYFAFEKH QPGNLSEATA ADIDKAFPAD WPTFSYIALD DTFVPQYDGK
NYFSMSAALL ATFSRGTVTI NTTNTADNPV VDPRWLDDPR DKEMAVAAFR RCREIVASET
MQQVIDGPEL LPGFEYQTDE EILNYIAETS DAYYAGVGTC AMGKPDDPLA VLDSKARVRG
VKGLRVVDAS AFPFAIDGQP MATVYALAEK VAADIIAGN
