CYSI_ZYMMO
ID CYSI_ZYMMO Reviewed; 570 AA.
AC Q5NRM2;
DT 13-SEP-2005, integrated into UniProtKB/Swiss-Prot.
DT 01-FEB-2005, sequence version 1.
DT 03-AUG-2022, entry version 103.
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=ZMO0008;
OS Zymomonas mobilis subsp. mobilis (strain ATCC 31821 / ZM4 / CP4).
OC Bacteria; Proteobacteria; Alphaproteobacteria; Sphingomonadales;
OC Zymomonadaceae; Zymomonas.
OX NCBI_TaxID=264203;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 31821 / ZM4 / CP4;
RX PubMed=15592456; DOI=10.1038/nbt1045;
RA Seo J.-S., Chong H., Park H.S., Yoon K.-O., Jung C., Kim J.J., Hong J.H.,
RA Kim H., Kim J.-H., Kil J.-I., Park C.J., Oh H.-M., Lee J.-S., Jin S.-J.,
RA Um H.-W., Lee H.-J., Oh S.-J., Kim J.Y., Kang H.L., Lee S.Y., Lee K.J.,
RA Kang H.S.;
RT "The genome sequence of the ethanologenic bacterium Zymomonas mobilis
RT ZM4.";
RL Nat. Biotechnol. 23:63-68(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}.
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DR EMBL; AE008692; AAV88632.1; -; Genomic_DNA.
DR RefSeq; WP_011239996.1; NZ_CP035711.1.
DR AlphaFoldDB; Q5NRM2; -.
DR SMR; Q5NRM2; -.
DR STRING; 264203.ZMO0008; -.
DR EnsemblBacteria; AAV88632; AAV88632; ZMO0008.
DR GeneID; 58025918; -.
DR KEGG; zmo:ZMO0008; -.
DR eggNOG; COG0155; Bacteria.
DR HOGENOM; CLU_001975_3_2_5; -.
DR OMA; MGMTHGD; -.
DR OrthoDB; 1588103at2; -.
DR UniPathway; UPA00140; UER00207.
DR Proteomes; UP000001173; 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; Reference proteome.
FT CHAIN 1..570
FT /note="Sulfite reductase [NADPH] hemoprotein beta-
FT component"
FT /id="PRO_0000199919"
FT BINDING 434
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01540"
FT BINDING 440
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01540"
FT BINDING 479
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01540"
FT BINDING 483
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01540"
FT BINDING 483
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 570 AA; 64064 MW; BA050FC80FC53326 CRC64;
MTQKHPQTLV VDAPLSDAER LKRESNFLRG TIAEDLNDGL TGGFNGDNST LIRFHGMYQQ
DDRDIRAERA EEKLEPRYAM MLRCRLPGGI ISPEQWLKMD SFASEKTLYG SIRLTNRQTF
QFHGILKKDL KTVHHLLHES GLDSLATAND VNRNVLCTSN PVESDLHAEA YEWAKKISEH
LLPQTHAYAE IWLDQEKLAT TDQEPILGAT YLPRKFKTTV VIPPQNDVDI YANDLNFIAI
SENDQLVGFN VLIGGGLSIT IGDKTTHPGV AKDIGYIEKE KVLAVAEAVV TTQRDWGNRS
NRKNARLRYT LERVGLDVFK AEVEKRAGVT FEASRPFTLT GRGDRFGWVK GIDNQWHLTL
FVENGRLLDY PHRPLKSGIA EIAKVHKGDF RLTANQNLIV AGVSEEDKDT IEKIARDHGL
LENISELRKN SMACVSFPTC PLAMAEAERF LPNFLTKVEA VMTKYDIADE YIVFRTTGCP
NNCGRSLLAE IGLVGRAIGR YNLYIGGDRV GTRIPRLFRE NITEDEILSE VDSLIGRWAK
ERDGKEAFGD FVVRAGIVKA VTDPAIDFYD
