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CYSI_XANC5
ID   CYSI_XANC5              Reviewed;         568 AA.
AC   Q3BPY4;
DT   03-NOV-2009, integrated into UniProtKB/Swiss-Prot.
DT   03-NOV-2009, sequence version 2.
DT   03-AUG-2022, entry version 99.
DE   RecName: Full=Sulfite reductase [NADPH] hemoprotein beta-component {ECO:0000255|HAMAP-Rule:MF_01540};
DE            Short=SiR-HP {ECO:0000255|HAMAP-Rule:MF_01540};
DE            Short=SiRHP {ECO:0000255|HAMAP-Rule:MF_01540};
DE            EC=1.8.1.2 {ECO:0000255|HAMAP-Rule:MF_01540};
GN   Name=cysI {ECO:0000255|HAMAP-Rule:MF_01540}; OrderedLocusNames=XCV3448;
OS   Xanthomonas campestris pv. vesicatoria (strain 85-10).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Xanthomonadales;
OC   Xanthomonadaceae; Xanthomonas.
OX   NCBI_TaxID=316273;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=85-10;
RX   PubMed=16237009; DOI=10.1128/jb.187.21.7254-7266.2005;
RA   Thieme F., Koebnik R., Bekel T., Berger C., Boch J., Buettner D.,
RA   Caldana C., Gaigalat L., Goesmann A., Kay S., Kirchner O., Lanz C.,
RA   Linke B., McHardy A.C., Meyer F., Mittenhuber G., Nies D.H.,
RA   Niesbach-Kloesgen U., Patschkowski T., Rueckert C., Rupp O., Schneiker S.,
RA   Schuster S.C., Vorhoelter F.J., Weber E., Puehler A., Bonas U., Bartels D.,
RA   Kaiser O.;
RT   "Insights into genome plasticity and pathogenicity of the plant pathogenic
RT   Bacterium Xanthomonas campestris pv. vesicatoria revealed by the complete
RT   genome sequence.";
RL   J. Bacteriol. 187:7254-7266(2005).
CC   -!- FUNCTION: Component of the sulfite reductase complex that catalyzes the
CC       6-electron reduction of sulfite to sulfide. This is one of several
CC       activities required for the biosynthesis of L-cysteine from sulfate.
CC       {ECO:0000255|HAMAP-Rule:MF_01540}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=3 H2O + hydrogen sulfide + 3 NADP(+) = 4 H(+) + 3 NADPH +
CC         sulfite; Xref=Rhea:RHEA:13801, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:17359, ChEBI:CHEBI:29919, ChEBI:CHEBI:57783,
CC         ChEBI:CHEBI:58349; EC=1.8.1.2; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01540};
CC   -!- COFACTOR:
CC       Name=siroheme; Xref=ChEBI:CHEBI:60052;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01540};
CC       Note=Binds 1 siroheme per subunit. {ECO:0000255|HAMAP-Rule:MF_01540};
CC   -!- COFACTOR:
CC       Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01540};
CC       Note=Binds 1 [4Fe-4S] cluster per subunit. {ECO:0000255|HAMAP-
CC       Rule:MF_01540};
CC   -!- PATHWAY: Sulfur metabolism; hydrogen sulfide biosynthesis; hydrogen
CC       sulfide from sulfite (NADPH route): step 1/1. {ECO:0000255|HAMAP-
CC       Rule:MF_01540}.
CC   -!- SUBUNIT: Alpha(8)-beta(8). The alpha component is a flavoprotein, the
CC       beta component is a hemoprotein. {ECO:0000255|HAMAP-Rule:MF_01540}.
CC   -!- SIMILARITY: Belongs to the nitrite and sulfite reductase 4Fe-4S domain
CC       family. {ECO:0000255|HAMAP-Rule:MF_01540}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=CAJ25179.1; Type=Erroneous initiation; Evidence={ECO:0000305};
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DR   EMBL; AM039952; CAJ25179.1; ALT_INIT; Genomic_DNA.
DR   RefSeq; WP_011348412.1; NZ_CP017190.1.
DR   AlphaFoldDB; Q3BPY4; -.
DR   SMR; Q3BPY4; -.
DR   STRING; 456327.BJD11_05495; -.
DR   EnsemblBacteria; CAJ25179; CAJ25179; XCV3448.
DR   GeneID; 63992477; -.
DR   KEGG; xcv:XCV3448; -.
DR   eggNOG; COG0155; Bacteria.
DR   HOGENOM; CLU_001975_3_2_6; -.
DR   UniPathway; UPA00140; UER00207.
DR   Proteomes; UP000007069; Chromosome.
DR   GO; GO:0009337; C:sulfite reductase complex (NADPH); IEA:InterPro.
DR   GO; GO:0051539; F:4 iron, 4 sulfur cluster binding; IEA:UniProtKB-KW.
DR   GO; GO:0020037; F:heme binding; IEA:InterPro.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0050661; F:NADP binding; IEA:InterPro.
DR   GO; GO:0004783; F:sulfite reductase (NADPH) activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0019344; P:cysteine biosynthetic process; IEA:UniProtKB-KW.
DR   GO; GO:0070814; P:hydrogen sulfide biosynthetic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0000103; P:sulfate assimilation; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.30.413.10; -; 2.
DR   HAMAP; MF_01540; CysI; 1.
DR   InterPro; IPR011786; CysI.
DR   InterPro; IPR005117; NiRdtase/SiRdtase_haem-b_fer.
DR   InterPro; IPR036136; Nit/Sulf_reduc_fer-like_dom_sf.
DR   InterPro; IPR006067; NO2/SO3_Rdtase_4Fe4S_dom.
DR   InterPro; IPR045169; NO2/SO3_Rdtase_4Fe4S_prot.
DR   InterPro; IPR045854; NO2/SO3_Rdtase_4Fe4S_sf.
DR   InterPro; IPR006066; NO2/SO3_Rdtase_FeS/sirohaem_BS.
DR   PANTHER; PTHR11493; PTHR11493; 1.
DR   Pfam; PF01077; NIR_SIR; 2.
DR   Pfam; PF03460; NIR_SIR_ferr; 2.
DR   PRINTS; PR00397; SIROHAEM.
DR   SUPFAM; SSF55124; SSF55124; 2.
DR   SUPFAM; SSF56014; SSF56014; 2.
DR   TIGRFAMs; TIGR02041; CysI; 1.
DR   PROSITE; PS00365; NIR_SIR; 1.
PE   3: Inferred from homology;
KW   4Fe-4S; Amino-acid biosynthesis; Cysteine biosynthesis; Heme; Iron;
KW   Iron-sulfur; Metal-binding; NADP; Oxidoreductase.
FT   CHAIN           1..568
FT                   /note="Sulfite reductase [NADPH] hemoprotein beta-
FT                   component"
FT                   /id="PRO_0000388531"
FT   BINDING         425
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01540"
FT   BINDING         431
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01540"
FT   BINDING         470
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01540"
FT   BINDING         474
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01540"
FT   BINDING         474
FT                   /ligand="siroheme"
FT                   /ligand_id="ChEBI:CHEBI:60052"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01540"
SQ   SEQUENCE   568 AA;  62383 MW;  197D5D82ED0DB645 CRC64;
     MSHSVEDIKS ESRRLRGSLQ QSLADAVTGA LREDDQTLIK YHGSYQQDDR DIRDERRRQK
     LEPAYQFMIR TRTPGGVITP TQWLALDGIA TRYANHSLRV TTRQAFQFHG VIKRELKATM
     QAINATLIDT LAACGDVNRN VQVAANPLLS QAHATLYADA ARVSEHLLPN TRAYYEIWLD
     EERVSGSGSE EEPIYGERYL PRKFKIGFAA PPLNDVDVFA NDLGFIAILR DGQLLGYNVS
     IGGGMGASHG DAETWPRVAN VIGFVTRDQL LDIATAVVTT QRDFGNRAVR KRARFKYTID
     DHGLDTIVAE IARRAGFALQ PAQPFAFDHN GDRYGWVEGE DGRWHLTLSL PAGRIADTDT
     AAHLSGLRAI AQLNVGEFRM TPNQNLVIAG VPASERARVD ALVAQYALDA GNRAATALAR
     GAMACVALPT CGLAMAEAER YLPDFSAALQ PLLQQHGLAD TPIVLRVSGC PNGCSRPYLA
     EMALVGKAPG RYNLMLGGDR RGQRLNTLYR ENITEPEILA ALQPLLARYA SEGDHANDEG
     FGDFLHRAGV IALPPYPTHR RLDLELLA
 
 
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