ID SIRG_LEPMC Reviewed; 234 AA.
AC Q6Q882;
DT 02-NOV-2016, integrated into UniProtKB/Swiss-Prot.
DT 05-JUL-2004, sequence version 1.
DT 24-JAN-2024, entry version 74.
DE RecName: Full=Glutathione S-transferase sirG {ECO:0000303|PubMed:15387811};
DE EC=2.5.1.18 {ECO:0000305|PubMed:15387811};
DE AltName: Full=Sirodesmin biosynthesis protein G {ECO:0000303|PubMed:15387811};
GN Name=sirG {ECO:0000303|PubMed:15387811};
OS Leptosphaeria maculans (Blackleg fungus) (Phoma lingam).
OC Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Dothideomycetes;
OC Pleosporomycetidae; Pleosporales; Pleosporineae; Leptosphaeriaceae;
OC Plenodomus; Plenodomus lingam/Leptosphaeria maculans species complex.
OX NCBI_TaxID=5022;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA], FUNCTION, AND INDUCTION.
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: Glutathione S-transferase; 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 -!- CATALYTIC ACTIVITY:
CC Reaction=glutathione + RX = a halide anion + an S-substituted
CC glutathione + H(+); Xref=Rhea:RHEA:16437, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:16042, ChEBI:CHEBI:17792, ChEBI:CHEBI:57925,
CC ChEBI:CHEBI:90779; EC=2.5.1.18;
CC Evidence={ECO:0000305|PubMed:15387811};
CC -!- PATHWAY: Mycotoxin biosynthesis. {ECO:0000305|PubMed:15387811}.
CC -!- INDUCTION: Expression is co-regulated with the other genes from the
CC sirodesmin cluster and corresponds with sirodesmin production
CC (PubMed:15387811). {ECO:0000269|PubMed:15387811}.
CC -!- SIMILARITY: Belongs to the GST superfamily. {ECO:0000305}.
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DR EMBL; AY553235; AAS92546.1; -; Genomic_DNA.
DR AlphaFoldDB; Q6Q882; -.
DR SMR; Q6Q882; -.
DR GO; GO:0004364; F:glutathione transferase activity; IEA:UniProtKB-EC.
DR Gene3D; 1.20.1050.130; -; 1.
DR InterPro; IPR010987; Glutathione-S-Trfase_C-like.
DR InterPro; IPR036282; Glutathione-S-Trfase_C_sf.
DR InterPro; IPR040079; Glutathione_S-Trfase.
DR InterPro; IPR004045; Glutathione_S-Trfase_N.
DR InterPro; IPR004046; GST_C.
DR InterPro; IPR036249; Thioredoxin-like_sf.
DR PANTHER; PTHR44051; GLUTATHIONE S-TRANSFERASE-RELATED; 1.
DR PANTHER; PTHR44051:SF8; GLUTATHIONE S-TRANSFERASE-RELATED; 1.
DR Pfam; PF00043; GST_C; 1.
DR Pfam; PF13409; GST_N_2; 1.
DR SFLD; SFLDS00019; Glutathione_Transferase_(cytos; 1.
DR SFLD; SFLDG00358; Main_(cytGST); 1.
DR SUPFAM; SSF47616; GST C-terminal domain-like; 1.
DR SUPFAM; SSF52833; Thioredoxin-like; 1.
DR PROSITE; PS50405; GST_CTER; 1.
DR PROSITE; PS50404; GST_NTER; 1.
PE 2: Evidence at transcript level;
KW Transferase; Virulence.
FT CHAIN 1..234
FT /note="Glutathione S-transferase sirG"
FT /id="PRO_0000437725"
FT DOMAIN 15..99
FT /note="GST N-terminal"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00684"
FT DOMAIN 105..230
FT /note="GST C-terminal"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00685"
SQ SEQUENCE 234 AA; 26775 MW; A7AE8D3838E32C98 CRC64;
MTERPKDIPE DKLVLYVVKA TPTSTANTVK PLIVMNELSI DHEIYVVPSP TRDEWFHQIN
PHKMVPAIES AETRDGKRLN IWESTSCLTY LTDAYDHEGL WKGSDLWERT QVNNWLTLHT
AALGATGKYW LYFSAIHPEK IPAVIEKLAN NIKVQYDILE RRLSEKGQKY IALPDRPTIA
DVANLPFVTE ELALKAGLRL GDWPNLQAWS EKMLARPSVQ KALSQKFRPS VMIR
//
