AHPC_ACICA
ID AHPC_ACICA Reviewed; 25 AA.
AC P82954;
DT 15-NOV-2002, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-2001, sequence version 1.
DT 25-MAY-2022, entry version 49.
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;
DE Flags: Fragment;
GN Name=ahpC;
OS Acinetobacter calcoaceticus.
OC Bacteria; Proteobacteria; Gammaproteobacteria; Moraxellales; Moraxellaceae;
OC Acinetobacter; Acinetobacter calcoaceticus/baumannii complex.
OX NCBI_TaxID=471 {ECO:0000305};
RN [1] {ECO:0000305}
RP PROTEIN SEQUENCE, AND INDUCTION.
RC STRAIN=69-V;
RX PubMed=11425483; DOI=10.1111/j.1574-6968.2001.tb10723.x;
RA Benndorf D., Loffhagen N., Babel W.;
RT "Protein synthesis patterns in Acinetobacter calcoaceticus induced by
RT phenol and catechol show specificities of responses to chemostress.";
RL FEMS Microbiol. Lett. 200:247-252(2001).
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 -!- INDUCTION: By oxidative stress, primary alcohols, monocyclic aromatics
CC and heat shock. {ECO:0000269|PubMed:11425483}.
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 AlphaFoldDB; P82954; -.
DR SMR; P82954; -.
DR STRING; 471.BUM88_05750; -.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0102039; F:alkylhydroperoxide reductase activity; IEA:UniProtKB-EC.
DR GO; GO:0004601; F:peroxidase activity; IEA:UniProtKB-KW.
PE 1: Evidence at protein level;
KW Antioxidant; Cytoplasm; Direct protein sequencing; Disulfide bond;
KW Oxidoreductase; Peroxidase; Redox-active center; Stress response.
FT CHAIN 1..>25
FT /note="Alkyl hydroperoxide reductase C"
FT /id="PRO_0000135112"
FT NON_TER 25
FT /evidence="ECO:0000303|PubMed:11425483"
SQ SEQUENCE 25 AA; 2836 MW; 7B3112366157F2D8 CRC64;
SLINTEVKPF QATAYHNGQF VEVNE