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Protein

Peroxiredoxin-2

Gene

Prdx2

Organism
Rattus norvegicus (Rat)
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Experimental evidence at protein leveli

Functioni

Thiol-specific peroxidase that catalyzes the reduction of hydrogen peroxide and organic hydroperoxides to water and alcohols, respectively. Plays a role in cell protection against oxidative stress by detoxifying peroxides and as sensor of hydrogen peroxide-mediated signaling events. Might participate in the signaling cascades of growth factors and tumor necrosis factor-alpha by regulating the intracellular concentrations of H2O2.By similarity

Miscellaneous

The active site is a conserved redox-active cysteine residue, the peroxidatic cysteine (C(P)), which makes the nucleophilic attack on the peroxide substrate. The peroxide oxidizes the C(P)-SH to cysteine sulfenic acid (C(P)-SOH), which then reacts with another cysteine residue, the resolving cysteine (C(R)), to form a disulfide bridge. The disulfide is subsequently reduced by an appropriate electron donor to complete the catalytic cycle. In this typical 2-Cys peroxiredoxin, C(R) is provided by the other dimeric subunit to form an intersubunit disulfide. The disulfide is subsequently reduced by thioredoxin.By similarity

Catalytic activityi

2 R'-SH + ROOH = R'-S-S-R' + H2O + ROH.By similarity

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Active sitei51Cysteine sulfenic acid (-SOH) intermediateBy similarity1

GO - Molecular functioni

GO - Biological processi

  • cell redox homeostasis Source: InterPro
  • negative regulation of neuron apoptotic process Source: RGD
  • response to oxidative stress Source: RGD

Keywordsi

Molecular functionAntioxidant, Oxidoreductase, Peroxidase

Enzyme and pathway databases

BRENDAi1.11.1.15. 5301.

Protein family/group databases

PeroxiBasei4477. Rno2CysPrx02.

Names & Taxonomyi

Protein namesi
Recommended name:
Peroxiredoxin-2 (EC:1.11.1.15)
Alternative name(s):
Thiol-specific antioxidant protein
Short name:
TSA
Thioredoxin peroxidase 1
Thioredoxin-dependent peroxide reductase 1
Gene namesi
Name:Prdx2
Synonyms:Tdpx1
OrganismiRattus norvegicus (Rat)
Taxonomic identifieri10116 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaMyomorphaMuroideaMuridaeMurinaeRattus
Proteomesi
  • UP000002494 Componenti: Unplaced

Organism-specific databases

RGDi3838. Prdx2.

Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte; Source: COMPARTMENTS

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Initiator methionineiRemovedBy similarity
ChainiPRO_00001350832 – 198Peroxiredoxin-2Add BLAST197

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei2N-acetylalanineBy similarity1
Disulfide bondi51Interchain (with C-172); in linked formBy similarity
Modified residuei112PhosphoserineBy similarity1
Disulfide bondi172Interchain (with C-51); in linked formBy similarity
Modified residuei182PhosphothreonineBy similarity1

Post-translational modificationi

The enzyme can be inactivated by further oxidation of the cysteine sulfenic acid (C(P)-SOH) to sulphinic acid (C(P)-SO2H) instead of its condensation to a disulfide bond. It can be reactivated by forming a transient disulfide bond with sulfiredoxin SRXN1, which reduces the cysteine sulfinic acid in an ATP- and Mg-dependent manner.By similarity

Keywords - PTMi

Acetylation, Disulfide bond, Phosphoprotein

Proteomic databases

PaxDbiP35704.
PRIDEiP35704.

2D gel databases

World-2DPAGEi0004:P35704.

PTM databases

iPTMnetiP35704.
PhosphoSitePlusiP35704.

Interactioni

Subunit structurei

Homodimer; disulfide-linked, upon oxidation. 5 homodimers assemble to form a ring-like decamer. Interacts with TIPIN.By similarity

Protein-protein interaction databases

BioGridi247997. 3 interactors.
IntActiP35704. 3 interactors.
STRINGi10116.ENSRNOP00000004799.

Structurei

3D structure databases

ProteinModelPortaliP35704.
SMRiP35704.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini6 – 164ThioredoxinPROSITE-ProRule annotationAdd BLAST159

Sequence similaritiesi

Keywords - Domaini

Redox-active center

Phylogenomic databases

eggNOGiKOG0852. Eukaryota.
COG0450. LUCA.
HOGENOMiHOG000022343.
HOVERGENiHBG000286.
InParanoidiP35704.
KOiK03386.
PhylomeDBiP35704.
TreeFamiTF105181.

Family and domain databases

InterProiView protein in InterPro
IPR000866. AhpC/TSA.
IPR024706. Peroxiredoxin_AhpC-typ.
IPR019479. Peroxiredoxin_C.
IPR036249. Thioredoxin-like_sf.
IPR013766. Thioredoxin_domain.
PfamiView protein in Pfam
PF10417. 1-cysPrx_C. 1 hit.
PF00578. AhpC-TSA. 1 hit.
PIRSFiPIRSF000239. AHPC. 1 hit.
SUPFAMiSSF52833. SSF52833. 1 hit.
PROSITEiView protein in PROSITE
PS51352. THIOREDOXIN_2. 1 hit.

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

P35704-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MASGNAHIGK PAPDFTGTAV VDGAFKEIKL SDYRGKYVVL FFYPLDFTFV
60 70 80 90 100
CPTEIIAFSD HAEDFRKLGC EVLGVSVDSQ FTHLAWINTP RKEGGLGPLN
110 120 130 140 150
IPLLADVTKS LSQNYGVLKN DEGIAYRGLF IIDAKGVLRQ ITVNDLPVGR
160 170 180 190
SVDEALRLVQ AFQYTDEHGE VCPAGWKPGS DTIKPNVDDS KEYFSKHN
Length:198
Mass (Da):21,784
Last modified:January 23, 2007 - v3
Checksum:iFC6AD9B0E9C4447B
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti17G → A in AAH58481 (PubMed:15489334).Curated1

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
U06099 mRNA. Translation: AAA19959.1.
BC058481 mRNA. Translation: AAH58481.1.
PIRiA57716.
RefSeqiNP_058865.1. NM_017169.1.
XP_006255306.1. XM_006255244.1.
UniGeneiRn.2511.

Genome annotation databases

GeneIDi29338.
KEGGirno:29338.

Similar proteinsi

Entry informationi

Entry nameiPRDX2_RAT
AccessioniPrimary (citable) accession number: P35704
Secondary accession number(s): Q6PDV3
Entry historyiIntegrated into UniProtKB/Swiss-Prot: June 1, 1994
Last sequence update: January 23, 2007
Last modified: October 25, 2017
This is version 145 of the entry and version 3 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Direct protein sequencing, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families