SIRB_LEPMC
ID SIRB_LEPMC Reviewed; 522 AA.
AC Q6Q884;
DT 02-NOV-2016, integrated into UniProtKB/Swiss-Prot.
DT 05-JUL-2004, sequence version 1.
DT 03-AUG-2022, entry version 90.
DE RecName: Full=Cytochrome P450 monooxygenase sirB {ECO:0000303|PubMed:15387811};
DE EC=1.-.-.- {ECO:0000305|PubMed:15387811};
DE AltName: Full=Sirodesmin biosynthesis protein B {ECO:0000303|PubMed:15387811};
GN Name=sirB {ECO:0000303|PubMed:15387811};
OS Leptosphaeria maculans (Blackleg fungus) (Phoma lingam).
OC Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Dothideomycetes;
OC Pleosporomycetidae; Pleosporales; Pleosporineae; Leptosphaeriaceae;
OC Leptosphaeria; Leptosphaeria maculans species complex.
OX NCBI_TaxID=5022;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND FUNCTION.
RX PubMed=15387811; DOI=10.1111/j.1365-2958.2004.04215.x;
RA Gardiner D.M., Cozijnsen A.J., Wilson L.M., Pedras M.S., Howlett B.J.;
RT "The sirodesmin biosynthetic gene cluster of the plant pathogenic fungus
RT Leptosphaeria maculans.";
RL Mol. Microbiol. 53:1307-1318(2004).
RN [2]
RP FUNCTION.
RX PubMed=18272357; DOI=10.1016/j.mycres.2007.08.017;
RA Fox E.M., Howlett B.J.;
RT "Biosynthetic gene clusters for epipolythiodioxopiperazines in filamentous
RT fungi.";
RL Mycol. Res. 112:162-169(2008).
RN [3]
RP FUNCTION.
RX PubMed=19762440; DOI=10.1099/mic.0.033886-0;
RA Kremer A., Li S.M.;
RT "A tyrosine O-prenyltransferase catalyses the first pathway-specific step
RT in the biosynthesis of sirodesmin PL.";
RL Microbiology 156:278-286(2010).
RN [4]
RP FUNCTION.
RX PubMed=21038099; DOI=10.1007/s00253-010-2956-x;
RA Zou H.X., Xie X., Zheng X.D., Li S.M.;
RT "The tyrosine O-prenyltransferase SirD catalyzes O-, N-, and C-
RT prenylations.";
RL Appl. Microbiol. Biotechnol. 89:1443-1451(2011).
RN [5]
RP FUNCTION.
RX PubMed=24083562; DOI=10.1021/cb400691z;
RA Rudolf J.D., Poulter C.D.;
RT "Tyrosine O-prenyltransferase SirD catalyzes S-, C-, and N-prenylations on
RT tyrosine and tryptophan derivatives.";
RL ACS Chem. Biol. 8:2707-2714(2013).
RN [6]
RP FUNCTION.
RX PubMed=27390873; DOI=10.1371/journal.pone.0158945;
RA Dopstadt J., Neubauer L., Tudzynski P., Humpf H.U.;
RT "The epipolythiodiketopiperazine gene cluster in Claviceps purpurea:
RT dysfunctional cytochrome P450 enzyme prevents formation of the previously
RT unknown clapurines.";
RL PLoS ONE 11:E0158945-E0158945(2016).
CC -!- FUNCTION: Cytochrome P450 monooxygenase; part of the gene cluster that
CC mediates the biosynthesis of sirodesmin PL, an
CC epipolythiodioxopiperazine (ETP) characterized by a disulfide bridged
CC cyclic dipeptide and that acts as a phytotoxin which is involved in the
CC blackleg didease of canola (PubMed:15387811, PubMed:18272357,
CC PubMed:19762440). SirD catalyzes the O-prenylation of L-tyrosine (L-
CC Tyr) in the presence of dimethylallyl diphosphate (DMAPP) to yield 4-O-
CC dimethylallyl-L-Tyr, and therefore represents probably the first
CC pathway-specific enzyme in the biosynthesis of sirodesmin PL
CC (PubMed:19762440, PubMed:21038099, PubMed:24083562). 4-O-dimethylallyl-
CC L-Tyr, then undergoes condensation with L-Ser in a reaction catalyzed
CC by the non-ribosomal peptide synthase sirP to form the diketopiperazine
CC (DKP) backbone (PubMed:18272357). Further bishydroxylation of the DKP
CC performed by the cytochrome P450 monooxygenase sirC leads to the
CC production of the intermediate phomamide (PubMed:27390873). This step
CC is essential to form the reactive thiol group required for toxicity of
CC sirodesmin PL (PubMed:27390873). The next steps of sirodesmin
CC biosynthesis are not well understood yet, but some predictions could be
CC made from intermediate compounds identification (PubMed:18272357).
CC Phomamide is converted into phomalizarine via oxidation, probably by
CC sirT (PubMed:18272357). Further oxidation, methylation (by sirM or
CC sirN) and reduction steps convert phomalizarine to deacetyl sirodesmin
CC (PubMed:18272357). Finally, acetyltransferase sirH probably acetylates
CC deacetyl sirodesmin to produce sirodesmin PL (PubMed:18272357).
CC {ECO:0000269|PubMed:19762440, ECO:0000269|PubMed:21038099,
CC ECO:0000269|PubMed:24083562, ECO:0000269|PubMed:27390873,
CC ECO:0000305|PubMed:15387811, ECO:0000305|PubMed:18272357}.
CC -!- COFACTOR:
CC Name=heme; Xref=ChEBI:CHEBI:30413;
CC Evidence={ECO:0000250|UniProtKB:P04798};
CC -!- PATHWAY: Mycotoxin biosynthesis. {ECO:0000305|PubMed:15387811}.
CC -!- SUBCELLULAR LOCATION: Membrane {ECO:0000255}; Multi-pass membrane
CC protein {ECO:0000255}.
CC -!- SIMILARITY: Belongs to the cytochrome P450 family. {ECO:0000305}.
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DR EMBL; AY553235; AAS92544.1; -; Genomic_DNA.
DR AlphaFoldDB; Q6Q884; -.
DR SMR; Q6Q884; -.
DR PRIDE; Q6Q884; -.
DR OMA; WLASTID; -.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR GO; GO:0020037; F:heme binding; IEA:InterPro.
DR GO; GO:0005506; F:iron ion binding; IEA:InterPro.
DR GO; GO:0004497; F:monooxygenase activity; IEA:UniProtKB-KW.
DR GO; GO:0016705; F:oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen; IEA:InterPro.
DR Gene3D; 1.10.630.10; -; 1.
DR InterPro; IPR001128; Cyt_P450.
DR InterPro; IPR002403; Cyt_P450_E_grp-IV.
DR InterPro; IPR036396; Cyt_P450_sf.
DR Pfam; PF00067; p450; 1.
DR PRINTS; PR00465; EP450IV.
DR SUPFAM; SSF48264; SSF48264; 1.
PE 3: Inferred from homology;
KW Glycoprotein; Heme; Iron; Membrane; Metal-binding; Monooxygenase;
KW Oxidoreductase; Transmembrane; Transmembrane helix; Virulence.
FT CHAIN 1..522
FT /note="Cytochrome P450 monooxygenase sirB"
FT /id="PRO_0000437707"
FT TRANSMEM 22..42
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 304..324
FT /note="Helical"
FT /evidence="ECO:0000255"
FT BINDING 462
FT /ligand="heme"
FT /ligand_id="ChEBI:CHEBI:30413"
FT /ligand_part="Fe"
FT /ligand_part_id="ChEBI:CHEBI:18248"
FT /note="axial binding residue"
FT /evidence="ECO:0000250|UniProtKB:P04798"
FT CARBOHYD 191
FT /note="N-linked (GlcNAc...) asparagine"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00498"
SQ SEQUENCE 522 AA; 59129 MW; 95E40FDBAC4A518B CRC64;
MSTLQDFQIA PAILHRVTVR DASAILFCTL LTVFLFISQG TVRGVKRVGK SRLRTLVTGE
TPLRFDLEKY GYLGYQQFSK KANKPFLVKI YGLDHYVLPV KYLDSLKTVD HHRLSFAQSL
NDFLNVDASL GDLVTHSDME IAVVTKHLNP RLTTLTPVLV DEANFAFEKE LGKLETWKTV
NALFLSAFLT NRTSGRVLVG DLCRDDNYLH AMMKYTESVF SSGVAFNGIP LGPFRKIVYY
LGARQHRRDL DNAAALVLPE IKRRMAAQAE DPNCRKENDA IQWNLDLPLA SPKEGLPLRH
AHRVLHLSFA ATGTVAILIT HMIYNVLMYP EYLEPLREEV MACTKAHGGW TEKAMNEMWK
LDSFIRETLR VQPPSVFTAY RTVKNQPFTF PDGFTLPVGS RITFPTLPVG LDPENYESAS
EFDGFRFFRK REEARLAKKA YNWGATKIDS SFLPFGYGNQ ACPGRFFGVR KTKILFGKLI
NDYDFSWAEP RSARPENIVI EGQILVNPTP EIKIKSRVAA GM
