TDXH1_PICTO
ID TDXH1_PICTO Reviewed; 227 AA.
AC Q6L240;
DT 21-DEC-2004, integrated into UniProtKB/Swiss-Prot.
DT 05-JUL-2004, sequence version 1.
DT 03-AUG-2022, entry version 102.
DE RecName: Full=Peroxiredoxin 1 {ECO:0000255|HAMAP-Rule:MF_00401};
DE EC=1.11.1.24 {ECO:0000255|HAMAP-Rule:MF_00401};
DE AltName: Full=Thioredoxin-dependent peroxiredoxin 1 {ECO:0000255|HAMAP-Rule:MF_00401};
GN OrderedLocusNames=PTO0377;
OS Picrophilus torridus (strain ATCC 700027 / DSM 9790 / JCM 10055 / NBRC
OS 100828).
OC Archaea; Candidatus Thermoplasmatota; Thermoplasmata; Thermoplasmatales;
OC Picrophilaceae; Picrophilus.
OX NCBI_TaxID=263820;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 700027 / DSM 9790 / JCM 10055 / NBRC 100828;
RX PubMed=15184674; DOI=10.1073/pnas.0401356101;
RA Fuetterer O., Angelov A., Liesegang H., Gottschalk G., Schleper C.,
RA Schepers B., Dock C., Antranikian G., Liebl W.;
RT "Genome sequence of Picrophilus torridus and its implications for life
RT around pH 0.";
RL Proc. Natl. Acad. Sci. U.S.A. 101:9091-9096(2004).
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:0000255|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:0000255|HAMAP-
CC Rule:MF_00401};
CC -!- SUBUNIT: Homodecamer. Pentamer of dimers that assemble into a ring
CC structure. {ECO:0000255|HAMAP-Rule:MF_00401}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|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. In this 1-Cys
CC peroxiredoxin, no C(R) is present and C(P) instead forms a disulfide
CC with a cysteine from another protein or with a small thiol molecule.
CC {ECO:0000255|HAMAP-Rule:MF_00401}.
CC -!- SIMILARITY: Belongs to the peroxiredoxin family. Prx6 subfamily.
CC {ECO:0000255|HAMAP-Rule:MF_00401}.
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DR EMBL; AE017261; AAT42962.1; -; Genomic_DNA.
DR RefSeq; WP_011177178.1; NC_005877.1.
DR AlphaFoldDB; Q6L240; -.
DR SMR; Q6L240; -.
DR STRING; 263820.PTO0377; -.
DR EnsemblBacteria; AAT42962; AAT42962; PTO0377.
DR GeneID; 2844058; -.
DR KEGG; pto:PTO0377; -.
DR eggNOG; arCOG00312; Archaea.
DR HOGENOM; CLU_042529_4_4_2; -.
DR OMA; FWYPKDF; -.
DR OrthoDB; 98508at2157; -.
DR Proteomes; UP000000438; Chromosome.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0008379; F:thioredoxin peroxidase activity; IEA:InterPro.
DR CDD; cd03016; PRX_1cys; 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 Pfam; PF10417; 1-cysPrx_C; 1.
DR Pfam; PF00578; AhpC-TSA; 1.
DR PIRSF; PIRSF000239; AHPC; 1.
DR SUPFAM; SSF52833; SSF52833; 1.
DR PROSITE; PS51352; THIOREDOXIN_2; 1.
PE 3: Inferred from homology;
KW Antioxidant; Cytoplasm; Oxidoreductase; Peroxidase; Redox-active center;
KW Reference proteome.
FT CHAIN 1..227
FT /note="Peroxiredoxin 1"
FT /id="PRO_0000135161"
FT DOMAIN 6..161
FT /note="Thioredoxin"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00401"
FT ACT_SITE 48
FT /note="Cysteine sulfenic acid (-SOH) intermediate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00401"
FT BINDING 124
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00401"
SQ SEQUENCE 227 AA; 25988 MW; 6507A529ABC898D0 CRC64;
MEGKMPLIGE KFPEMEVVTN LGNIKLPDDF KGKWFVLFSH PGDFTPVCTT EFFSFAKHHD
DFKKLNTELI GLSVDSKISH IEWINWIKQN LKIDIKFPII ADPMGHVATK LGMIQAQSAT
QTVRAVFIVD DRSTIRAILY YPMETGRNIS EILRLIKSLQ MVDKYKIVTP ANWPNNEIIG
DNVLNPPPAT QNDIEERTKK YKGYAWWLTY QDANKADVDE AKEITGE