ID AHPC_STAA3 Reviewed; 189 AA.
AC Q2FJN4;
DT 06-MAR-2007, integrated into UniProtKB/Swiss-Prot.
DT 21-MAR-2006, sequence version 1.
DT 24-JAN-2024, entry version 98.
DE RecName: Full=Alkyl hydroperoxide reductase C;
DE EC=1.11.1.26 {ECO:0000250|UniProtKB:P0A251};
DE AltName: Full=Peroxiredoxin;
DE AltName: Full=Thioredoxin peroxidase;
GN Name=ahpC; OrderedLocusNames=SAUSA300_0380;
OS Staphylococcus aureus (strain USA300).
OC Bacteria; Bacillota; Bacilli; Bacillales; Staphylococcaceae;
OC Staphylococcus.
OX NCBI_TaxID=367830;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=USA300;
RX PubMed=16517273; DOI=10.1016/s0140-6736(06)68231-7;
RA Diep B.A., Gill S.R., Chang R.F., Phan T.H., Chen J.H., Davidson M.G.,
RA Lin F., Lin J., Carleton H.A., Mongodin E.F., Sensabaugh G.F.,
RA Perdreau-Remington F.;
RT "Complete genome sequence of USA300, an epidemic clone of community-
RT acquired meticillin-resistant Staphylococcus aureus.";
RL Lancet 367:731-739(2006).
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:0000250|UniProtKB:P0A251}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a hydroperoxide + H(+) + NADH = an alcohol + H2O + NAD(+);
CC Xref=Rhea:RHEA:62628, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC ChEBI:CHEBI:30879, ChEBI:CHEBI:35924, ChEBI:CHEBI:57540,
CC ChEBI:CHEBI:57945; EC=1.11.1.26;
CC Evidence={ECO:0000250|UniProtKB:P0A251};
CC -!- SUBUNIT: Homodimer; disulfide-linked, upon oxidation. 5 homodimers
CC assemble to form a ring-like decamer. {ECO:0000250|UniProtKB:P0A251}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250|UniProtKB:P0AE08}.
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 typical 2-Cys
CC peroxiredoxin, C(R) is provided by the other dimeric subunit to form an
CC intersubunit disulfide. The disulfide is subsequently reduced by AhpF.
CC {ECO:0000250|UniProtKB:P0A251}.
CC -!- SIMILARITY: Belongs to the peroxiredoxin family. AhpC/Prx1 subfamily.
CC {ECO:0000305}.
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DR EMBL; CP000255; ABD22688.1; -; Genomic_DNA.
DR RefSeq; WP_000052781.1; NZ_CP027476.1.
DR AlphaFoldDB; Q2FJN4; -.
DR SMR; Q2FJN4; -.
DR KEGG; saa:SAUSA300_0380; -.
DR HOGENOM; CLU_042529_21_3_9; -.
DR OMA; FWYPKDF; -.
DR Proteomes; UP000001939; Chromosome.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0102039; F:NADH-dependent peroxiredoxin activity; IEA:UniProtKB-EC.
DR GO; GO:0006979; P:response to oxidative stress; IEA:InterPro.
DR CDD; cd03015; PRX_Typ2cys; 1.
DR Gene3D; 3.40.30.10; Glutaredoxin; 1.
DR InterPro; IPR017559; AhpC.
DR InterPro; IPR000866; AhpC/TSA.
DR InterPro; IPR024706; Peroxiredoxin_AhpC-typ.
DR InterPro; IPR019479; Peroxiredoxin_C.
DR InterPro; IPR036249; Thioredoxin-like_sf.
DR InterPro; IPR013766; Thioredoxin_domain.
DR NCBIfam; TIGR03137; AhpC; 1.
DR PANTHER; PTHR10681:SF121; ALKYL HYDROPEROXIDE REDUCTASE C; 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; Cytoplasm; Disulfide bond; Oxidoreductase; Peroxidase;
KW Redox-active center.
FT CHAIN 1..189
FT /note="Alkyl hydroperoxide reductase C"
FT /id="PRO_0000279760"
FT DOMAIN 2..159
FT /note="Thioredoxin"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU00691"
FT ACT_SITE 49
FT /note="Cysteine sulfenic acid (-SOH) intermediate"
FT /evidence="ECO:0000250|UniProtKB:P0A251"
FT DISULFID 49
FT /note="Interchain (with C-168); in linked form"
FT /evidence="ECO:0000250|UniProtKB:P0A251"
FT DISULFID 168
FT /note="Interchain (with C-49); in linked form"
FT /evidence="ECO:0000250|UniProtKB:P0A251"
SQ SEQUENCE 189 AA; 20977 MW; B7134A9C84066B73 CRC64;
MSLINKEILP FTAQAFDPKK DQFKEVTQED LKGSWSVVCF YPADFSFVCP TELEDLQNQY
EELQKLGVNV FSVSTDTHFV HKAWHDHSDA ISKITYTMIG DPSQTITRNF DVLDEATGLA
QRGTFIIDPD GVVQASEINA DGIGRDASTL AHKIKAAQYV RKNPGEVCPA KWEEGAKTLQ
PGLDLVGKI
//
