ID C0QBG5_DESAH Unreviewed; 219 AA.
AC C0QBG5;
DT 05-MAY-2009, integrated into UniProtKB/TrEMBL.
DT 05-MAY-2009, sequence version 1.
DT 24-JAN-2024, entry version 83.
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 Name=ahpC {ECO:0000313|EMBL:ACN16967.1};
GN OrderedLocusNames=HRM2_39090 {ECO:0000313|EMBL:ACN16967.1};
OS Desulforapulum autotrophicum (strain ATCC 43914 / DSM 3382 / VKM B-1955 /
OS HRM2) (Desulfobacterium autotrophicum).
OC Bacteria; Thermodesulfobacteriota; Desulfobacteria; Desulfobacterales;
OC Desulfobacteraceae; Desulforapulum.
OX NCBI_TaxID=177437 {ECO:0000313|EMBL:ACN16967.1, ECO:0000313|Proteomes:UP000000442};
RN [1] {ECO:0000313|EMBL:ACN16967.1, ECO:0000313|Proteomes:UP000000442}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 43914 / DSM 3382 / HRM2
RC {ECO:0000313|Proteomes:UP000000442};
RX PubMed=19187283; DOI=10.1111/j.1462-2920.2008.01825.x;
RA Strittmatter A.W., Liesegang H., Rabus R., Decker I., Amann J., Andres S.,
RA Henne A., Fricke W.F., Martinez-Arias R., Bartels D., Goesmann A.,
RA Krause L., Puehler A., Klenk H.P., Richter M., Schuler M., Gloeckner F.O.,
RA Meyerdierks A., Gottschalk G., Amann R.;
RT "Genome sequence of Desulfobacterium autotrophicum HRM2, a marine sulfate
RT reducer oxidizing organic carbon completely to carbon dioxide.";
RL Environ. Microbiol. 11:1038-1055(2009).
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. Prx6 subfamily.
CC {ECO:0000256|ARBA:ARBA00025719, ECO:0000256|HAMAP-Rule:MF_00401}.
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DR EMBL; CP001087; ACN16967.1; -; Genomic_DNA.
DR RefSeq; WP_015905710.1; NC_012108.1.
DR AlphaFoldDB; C0QBG5; -.
DR STRING; 177437.HRM2_39090; -.
DR KEGG; dat:HRM2_39090; -.
DR eggNOG; COG0450; Bacteria.
DR HOGENOM; CLU_042529_4_4_7; -.
DR OMA; RLTMLYP; -.
DR OrthoDB; 9812811at2; -.
DR Proteomes; UP000000442; Chromosome.
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; IPR022915; Peroxiredoxin_TDXH.
DR InterPro; IPR045020; PRX_1cys.
DR InterPro; IPR036249; Thioredoxin-like_sf.
DR InterPro; IPR013766; Thioredoxin_domain.
DR PANTHER; PTHR43503; MCG48959-RELATED; 1.
DR PANTHER; PTHR43503:SF4; PEROXIREDOXIN-6; 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|HAMAP-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:UP000000442}.
FT DOMAIN 9..163
FT /note="Thioredoxin"
FT /evidence="ECO:0000259|PROSITE:PS51352"
FT ACT_SITE 51
FT /note="Cysteine sulfenic acid (-SOH) intermediate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00401"
FT ACT_SITE 51
FT /note="Cysteine sulfenic acid (-SOH) intermediate; for
FT peroxidase activity"
FT /evidence="ECO:0000256|PIRSR:PIRSR000239-1"
FT BINDING 126
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00401"
FT DISULFID 51
FT /note="Interchain (with Cys-213); in linked form"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00401"
FT DISULFID 207..213
FT /note="Alternate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00401"
FT DISULFID 213
FT /note="Interchain (with Cys-51); in linked form"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00401"
SQ SEQUENCE 219 AA; 24863 MW; A8E6EEB17E0B1042 CRC64;
MEETKVNMPL LGDALPELKV QSTHGPMNIP GDMKGKWFVL FSHPADFTPV CTTEFVAFQK
RYEEFEKLGC KLIGMSIDQV FSHIKWVQWI KAELDVDIKF PIVAANDSVA MKLGMLHPGK
GTNTVRAVFI VDPDSKVRLI MYYPQEVGRN MDEIVRSVKA LQISDQQGAV AAGWPDNELI
GDRIIMPPST NQADAEKRME KSDAFECFDW WFCHKPLEK
//