ID A0A1G5FK72_9CLOT Unreviewed; 169 AA.
AC A0A1G5FK72;
DT 22-NOV-2017, integrated into UniProtKB/TrEMBL.
DT 22-NOV-2017, sequence version 1.
DT 24-JAN-2024, entry version 23.
DE RecName: Full=Thiol peroxidase {ECO:0000256|HAMAP-Rule:MF_00269};
DE Short=Tpx {ECO:0000256|HAMAP-Rule:MF_00269};
DE EC=1.11.1.24 {ECO:0000256|HAMAP-Rule:MF_00269};
DE AltName: Full=Peroxiredoxin tpx {ECO:0000256|HAMAP-Rule:MF_00269};
DE Short=Prx {ECO:0000256|HAMAP-Rule:MF_00269};
DE AltName: Full=Thioredoxin peroxidase {ECO:0000256|HAMAP-Rule:MF_00269};
DE AltName: Full=Thioredoxin-dependent peroxiredoxin {ECO:0000256|HAMAP-Rule:MF_00269};
GN Name=tpx {ECO:0000256|HAMAP-Rule:MF_00269};
GN ORFNames=SAMN03080606_01447 {ECO:0000313|EMBL:SCY39656.1};
OS Alkaliphilus peptidifermentans DSM 18978.
OC Bacteria; Bacillota; Clostridia; Eubacteriales; Clostridiaceae;
OC Alkaliphilus.
OX NCBI_TaxID=1120976 {ECO:0000313|EMBL:SCY39656.1, ECO:0000313|Proteomes:UP000198636};
RN [1] {ECO:0000313|EMBL:SCY39656.1, ECO:0000313|Proteomes:UP000198636}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 18978 {ECO:0000313|EMBL:SCY39656.1,
RC ECO:0000313|Proteomes:UP000198636};
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_00269}.
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_00269};
CC -!- SUBUNIT: Homodimer. {ECO:0000256|HAMAP-Rule:MF_00269}.
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. In this atypical 2-Cys
CC peroxiredoxin, C(R) is present in the same subunit to form an
CC intramolecular disulfide. The disulfide is subsequently reduced by
CC thioredoxin. {ECO:0000256|HAMAP-Rule:MF_00269}.
CC -!- SIMILARITY: Belongs to the peroxiredoxin family. Tpx subfamily.
CC {ECO:0000256|HAMAP-Rule:MF_00269}.
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DR EMBL; FMUS01000007; SCY39656.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1G5FK72; -.
DR STRING; 1120976.SAMN03080606_01447; -.
DR OrthoDB; 9781543at2; -.
DR Proteomes; UP000198636; Unassembled WGS sequence.
DR GO; GO:0008379; F:thioredoxin peroxidase activity; IEA:UniProtKB-UniRule.
DR CDD; cd03014; PRX_Atyp2cys; 1.
DR Gene3D; 3.40.30.10; Glutaredoxin; 1.
DR HAMAP; MF_00269; Tpx; 1.
DR InterPro; IPR013740; Redoxin.
DR InterPro; IPR036249; Thioredoxin-like_sf.
DR InterPro; IPR013766; Thioredoxin_domain.
DR InterPro; IPR002065; TPX.
DR PANTHER; PTHR43110; THIOL PEROXIDASE; 1.
DR PANTHER; PTHR43110:SF1; THIOL PEROXIDASE; 1.
DR Pfam; PF08534; Redoxin; 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_00269}; Disulfide bond {ECO:0000256|HAMAP-Rule:MF_00269};
KW Oxidoreductase {ECO:0000256|HAMAP-Rule:MF_00269};
KW Peroxidase {ECO:0000256|ARBA:ARBA00022559, ECO:0000256|HAMAP-
KW Rule:MF_00269}; Redox-active center {ECO:0000256|HAMAP-Rule:MF_00269};
KW Reference proteome {ECO:0000313|Proteomes:UP000198636}.
FT DOMAIN 22..169
FT /note="Thioredoxin"
FT /evidence="ECO:0000259|PROSITE:PS51352"
FT ACT_SITE 64
FT /note="Cysteine sulfenic acid (-SOH) intermediate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00269"
FT DISULFID 64..98
FT /note="Redox-active"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00269"
SQ SEQUENCE 169 AA; 18850 MW; F1A0A4C2743FD9CD CRC64;
MDKRKSVVTM KGNPVTLLGK EMMVGDIAPN FTAVTKDLKE FTLKDMEGKI KLISVVPSID
TGVCDLQTMT FNEEAEKLNN TVVVTISMDL PFALNRYCAA KGLENAITLS DHREASFGLA
YGFLIEELRL LARGVIVLDQ NNKVIYVEYV NEISQQPNYD KALETVKQL
//