ID A0A1I4R2M6_9BACI Unreviewed; 220 AA.
AC A0A1I4R2M6;
DT 22-NOV-2017, integrated into UniProtKB/TrEMBL.
DT 22-NOV-2017, sequence version 1.
DT 27-MAR-2024, entry version 34.
DE RecName: Full=Peroxiredoxin {ECO:0000256|HAMAP-Rule:MF_00401};
DE EC=1.11.1.24 {ECO:0000256|HAMAP-Rule:MF_00401};
DE AltName: Full=Thioredoxin peroxidase {ECO:0000256|HAMAP-Rule:MF_00401};
DE AltName: Full=Thioredoxin-dependent peroxiredoxin {ECO:0000256|HAMAP-Rule:MF_00401};
GN ORFNames=SAMN04488054_1591 {ECO:0000313|EMBL:SFM46562.1};
OS Salibacterium qingdaonense.
OC Bacteria; Bacillota; Bacilli; Bacillales; Bacillaceae.
OX NCBI_TaxID=266892 {ECO:0000313|EMBL:SFM46562.1, ECO:0000313|Proteomes:UP000199668};
RN [1] {ECO:0000313|EMBL:SFM46562.1, ECO:0000313|Proteomes:UP000199668}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CGMCC 1.6134 {ECO:0000313|EMBL:SFM46562.1,
RC ECO:0000313|Proteomes:UP000199668};
RA de Groot N.N.;
RL Submitted (OCT-2016) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Thiol-specific peroxidase that catalyzes the reduction of
CC hydrogen peroxide and organic hydroperoxides to water and alcohols,
CC respectively. Plays a role in cell protection against oxidative stress
CC by detoxifying peroxides. {ECO:0000256|HAMAP-Rule:MF_00401}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=[thioredoxin]-dithiol + a hydroperoxide = [thioredoxin]-
CC disulfide + an alcohol + H2O; Xref=Rhea:RHEA:62620, Rhea:RHEA-
CC COMP:10698, Rhea:RHEA-COMP:10700, ChEBI:CHEBI:15377,
CC ChEBI:CHEBI:29950, ChEBI:CHEBI:30879, ChEBI:CHEBI:35924,
CC ChEBI:CHEBI:50058; EC=1.11.1.24; Evidence={ECO:0000256|HAMAP-
CC Rule:MF_00401};
CC -!- SUBUNIT: Homodecamer. Pentamer of dimers that assemble into a ring
CC structure. {ECO:0000256|HAMAP-Rule:MF_00401}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_00401}.
CC -!- MISCELLANEOUS: The active site is a conserved redox-active cysteine
CC residue, the peroxidatic cysteine (C(P)), which makes the nucleophilic
CC attack on the peroxide substrate. The peroxide oxidizes the C(P)-SH to
CC cysteine sulfenic acid (C(P)-SOH), which then reacts with another
CC cysteine residue, the resolving cysteine (C(R)), to form a disulfide
CC bridge. The disulfide is subsequently reduced by an appropriate
CC electron donor to complete the catalytic cycle. Although the primary
CC sequence of this enzyme is similar to those of the 1-Cys Prx6 enzymes,
CC its catalytic properties resemble those of the typical 2-Cys Prxs and
CC C(R) is provided by the other dimeric subunit to form an intersubunit
CC disulfide. The disulfide is subsequently reduced by thioredoxin.
CC {ECO:0000256|HAMAP-Rule:MF_00401}.
CC -!- SIMILARITY: Belongs to the peroxiredoxin family. AhpC/Prx1 subfamily.
CC {ECO:0000256|ARBA:ARBA00009796}.
CC -!- SIMILARITY: Belongs to the peroxiredoxin family. Prx6 subfamily.
CC {ECO:0000256|ARBA:ARBA00025719, ECO:0000256|HAMAP-Rule:MF_00401}.
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DR EMBL; FOTY01000059; SFM46562.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1I4R2M6; -.
DR STRING; 266892.SAMN04488054_1591; -.
DR OrthoDB; 9812811at2; -.
DR Proteomes; UP000199668; Unassembled WGS sequence.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0140824; F:thioredoxin-dependent peroxiredoxin activity; IEA:UniProtKB-EC.
DR CDD; cd03016; PRX_1cys; 1.
DR Gene3D; 3.40.30.10; Glutaredoxin; 1.
DR HAMAP; MF_00401; Peroxiredoxin; 1.
DR InterPro; IPR000866; AhpC/TSA.
DR InterPro; IPR024706; Peroxiredoxin_AhpC-typ.
DR InterPro; IPR019479; Peroxiredoxin_C.
DR InterPro; IPR022915; Peroxiredoxin_TDXH.
DR InterPro; IPR045020; PRX_1cys.
DR InterPro; IPR036249; Thioredoxin-like_sf.
DR InterPro; IPR013766; Thioredoxin_domain.
DR PANTHER; PTHR10681:SF171; AT16346P-RELATED; 1.
DR PANTHER; PTHR10681; THIOREDOXIN PEROXIDASE; 1.
DR Pfam; PF10417; 1-cysPrx_C; 1.
DR Pfam; PF00578; AhpC-TSA; 1.
DR PIRSF; PIRSF000239; AHPC; 1.
DR SUPFAM; SSF52833; Thioredoxin-like; 1.
DR PROSITE; PS51352; THIOREDOXIN_2; 1.
PE 3: Inferred from homology;
KW Antioxidant {ECO:0000256|ARBA:ARBA00022862, ECO:0000256|HAMAP-
KW Rule:MF_00401};
KW Cytoplasm {ECO:0000256|ARBA:ARBA00022490, ECO:0000256|HAMAP-Rule:MF_00401};
KW Disulfide bond {ECO:0000256|ARBA:ARBA00023157, ECO:0000256|HAMAP-
KW Rule:MF_00401};
KW Oxidoreductase {ECO:0000256|ARBA:ARBA00023002, ECO:0000256|HAMAP-
KW Rule:MF_00401};
KW Peroxidase {ECO:0000256|ARBA:ARBA00022559, ECO:0000256|HAMAP-
KW Rule:MF_00401}; Redox-active center {ECO:0000256|HAMAP-Rule:MF_00401};
KW Reference proteome {ECO:0000313|Proteomes:UP000199668}.
FT DOMAIN 14..169
FT /note="Thioredoxin"
FT /evidence="ECO:0000259|PROSITE:PS51352"
FT REGION 174..201
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT ACT_SITE 55
FT /note="Cysteine sulfenic acid (-SOH) intermediate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00401"
FT ACT_SITE 55
FT /note="Cysteine sulfenic acid (-SOH) intermediate; for
FT peroxidase activity"
FT /evidence="ECO:0000256|PIRSR:PIRSR000239-1"
FT BINDING 132
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00401"
FT DISULFID 55
FT /note="Interchain (with Cys-215); in linked form"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00401"
FT DISULFID 209..215
FT /note="Alternate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00401"
FT DISULFID 215
FT /note="Interchain (with Cys-55); in linked form"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00401"
SQ SEQUENCE 220 AA; 24910 MW; F7212CC1A0300852 CRC64;
MEQQEQQTQG QGLPRIGEQA PVFDAVTTHG NISLNDYSGQ WLVLFSHPAD FTPVCTSEFV
AFQEVYGRLK EMNTELLGLS IDSVSSHIAW VRNIEENFQT TIEFPIIADL DQKVATQYGM
VMPESTGTET SRAVFVIDDN QKIRAVIYYP LSTGRNMEEI VRLVEALRTT DEHGVSTPAN
WNSGDKAIVS PPKTKEEAQE RMNSDEYDCV DWYYCQKDIK
//
