UniProtKB - O35244 (PRDX6_RAT)
Protein
Peroxiredoxin-6
Gene
Prdx6
Organism
Rattus norvegicus (Rat)
Status
Functioni
Thiol-specific peroxidase that catalyzes the reduction of hydrogen peroxide and organic hydroperoxides to water and alcohols, respectively. Can reduce H2O2 and short chain organic, fatty acid, and phospholipid hydroperoxides. Also has phospholipase activity, and can therefore either reduce the oxidized sn-2 fatty acyl grup of phospholipids (peroxidase activity) or hydrolyze the sn-2 ester bond of phospholipids (phospholipase activity). These activities are dependent on binding to phospholipids at acidic pH and to oxidized phospholipds at cytosolic pH. Plays a role in cell protection against oxidative stress by detoxifying peroxides and in phospholipid homeostasis.3 Publications
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 1-Cys peroxiredoxin, no C(R) is present and C(P) instead forms a disulfide with a cysteine from another protein or with a small thiol molecule. C(P) is reactivated by glutathionylation mediated by glutathione S-transferase Pi, followed by spontaneous reduction of the enzyme with glutathione.1 Publication
Catalytic activityi
- EC:1.11.1.151 Publication
- a 1,2-diacyl-sn-glycero-3-phosphocholine + H2O = a 1-acyl-sn-glycero-3-phosphocholine + a fatty acid + H+1 PublicationEC:3.1.1.41 Publication
Kineticsi
- KM=0.25 mM for dipalmitoyl phosphatidylcholine1 Publication
- Vmax=1.89 nmol/h/mg enzyme for dipalmitoyl phosphatidylcholine1 Publication
pH dependencei
Optimum pH is 4 (for phospholipase activity).1 Publication
Sites
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Sitei | 32 | Important for phospholipase activity1 Publication | 1 | |
Active sitei | 47 | Cysteine sulfenic acid (-SOH) intermediate; for peroxidase activity1 Publication | 1 | |
Active sitei | 140 | For phospholipase activity1 Publication | 1 |
GO - Molecular functioni
- calcium-independent phospholipase A2 activity Source: Ensembl
- glutathione peroxidase activity Source: RGD
- peroxiredoxin activity Source: UniProtKB-EC
- phospholipase A2 activity (consuming 1,2-dipalmitoylphosphatidylcholine) Source: UniProtKB-EC
- phospholipase A2 activity consuming 1,2-dioleoylphosphatidylethanolamine) Source: UniProtKB-EC
- protein homodimerization activity Source: Ensembl
- ubiquitin protein ligase binding Source: Ensembl
GO - Biological processi
- cell redox homeostasis Source: GO_Central
- glycerophospholipid catabolic process Source: Ensembl
- hydrogen peroxide catabolic process Source: RGD
- positive regulation of mRNA splicing, via spliceosome Source: Ensembl
- response to oxidative stress Source: Ensembl
Keywordsi
Molecular function | Antioxidant, Hydrolase, Multifunctional enzyme, Oxidoreductase, Peroxidase |
Biological process | Lipid degradation, Lipid metabolism |
Enzyme and pathway databases
BRENDAi | 1.11.1.15 5301 |
Reactomei | R-RNO-3299685 Detoxification of Reactive Oxygen Species R-RNO-6798695 Neutrophil degranulation |
Protein family/group databases
PeroxiBasei | 4427 Rno1CysPrx |
Names & Taxonomyi
Protein namesi | Recommended name: Peroxiredoxin-6 (EC:1.11.1.151 Publication)Alternative name(s): 1-Cys peroxiredoxin Short name: 1-Cys PRX Antioxidant protein 2 Non-selenium glutathione peroxidase Short name: NSGPx Thiol-specific antioxidant protein |
Gene namesi | Name:Prdx6 Synonyms:Aipla2, Aop2, Tsa |
Organismi | Rattus norvegicus (Rat) |
Taxonomic identifieri | 10116 [NCBI] |
Taxonomic lineagei | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Glires › Rodentia › Myomorpha › Muroidea › Muridae › Murinae › Rattus |
Proteomesi |
|
Organism-specific databases
RGDi | 71005 Prdx6 |
Pathology & Biotechi
Mutagenesis
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Mutagenesisi | 26 | H → A: Abolishes lipid binding. 1 Publication | 1 | |
Mutagenesisi | 32 | S → A: Abolishes lipid binding. 1 Publication | 1 | |
Mutagenesisi | 140 | D → A: Abolishes phospholipase activity, but does not impair lipid binding. 1 Publication | 1 |
PTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Initiator methioninei | RemovedBy similarity | |||
ChainiPRO_0000135104 | 2 – 224 | Peroxiredoxin-6Add BLAST | 223 |
Amino acid modifications
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Modified residuei | 44 | PhosphothreonineBy similarity | 1 | |
Modified residuei | 63 | N6-acetyllysineBy similarity | 1 | |
Modified residuei | 89 | PhosphotyrosineBy similarity | 1 | |
Modified residuei | 177 | Phosphothreonine; by MAPK1 Publication | 1 | |
Modified residuei | 209 | N6-acetyllysine; alternateBy similarity | 1 | |
Modified residuei | 209 | N6-succinyllysine; alternateBy similarity | 1 |
Post-translational modificationi
Phosphorylation at Thr-177 by MAP kinases increases the phospholipase activity of the enzyme.1 Publication
Irreversibly inactivated by overoxidation of Cys-47 to sulfinic acid (Cys-SO2H) and sulfonic acid (Cys-SO3H) forms upon oxidative stress.By similarity
Keywords - PTMi
Acetylation, PhosphoproteinProteomic databases
jPOSTi | O35244 |
PaxDbi | O35244 |
PRIDEi | O35244 |
2D gel databases
World-2DPAGEi | 0004:O35244 |
PTM databases
iPTMneti | O35244 |
PhosphoSitePlusi | O35244 |
SwissPalmi | O35244 |
Expressioni
Gene expression databases
Bgeei | ENSRNOG00000002896 Expressed in 10 organ(s), highest expression level in lung |
Genevisiblei | O35244 RN |
Interactioni
Subunit structurei
Homodimer (By similarity).
Interacts with GSTP1; mediates PRDX6 glutathionylation and regeneration (Probable).
Interacts with APEX1.
Interacts with STH. May interact with FAM168B (By similarity). May interact with HTR2A (By similarity).
By similarity1 PublicationBinary interactionsi
GO - Molecular functioni
- protein homodimerization activity Source: Ensembl
- ubiquitin protein ligase binding Source: Ensembl
Protein-protein interaction databases
BioGridi | 250165, 3 interactors |
IntActi | O35244, 4 interactors |
STRINGi | 10116.ENSRNOP00000030323 |
Family & Domainsi
Domains and Repeats
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Domaini | 5 – 169 | ThioredoxinPROSITE-ProRule annotationAdd BLAST | 165 |
Region
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Regioni | 31 – 40 | Required and sufficient for targeting to lysosomes and lamellar bodies1 Publication | 10 |
Sequence similaritiesi
Keywords - Domaini
Redox-active centerPhylogenomic databases
eggNOGi | KOG0854 Eukaryota COG0450 LUCA |
GeneTreei | ENSGT00550000074794 |
HOGENOMi | HOG000022346 |
InParanoidi | O35244 |
KOi | K11188 |
OMAi | IPLTCRA |
OrthoDBi | 1129256at2759 |
PhylomeDBi | O35244 |
TreeFami | TF105183 |
Family and domain databases
Gene3Di | 3.40.30.10, 1 hit |
InterProi | View protein in InterPro IPR000866 AhpC/TSA IPR024706 Peroxiredoxin_AhpC-typ IPR019479 Peroxiredoxin_C IPR036249 Thioredoxin-like_sf IPR013766 Thioredoxin_domain |
Pfami | View protein in Pfam PF10417 1-cysPrx_C, 1 hit PF00578 AhpC-TSA, 1 hit |
PIRSFi | PIRSF000239 AHPC, 1 hit |
SUPFAMi | SSF52833 SSF52833, 1 hit |
PROSITEi | View protein in PROSITE PS51352 THIOREDOXIN_2, 1 hit |
i Sequence
Sequence statusi: Complete.
: The displayed sequence is further processed into a mature form. Sequence processingi
O35244-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
MPGGLLLGDE APNFEANTTI GHIRFHDFLG DSWGILFSHP RDFTPVCTTE
60 70 80 90 100
LGRAAKLAPE FAKRNVKLIA LSIDSVEDHF AWSKDINAYN GAAPTEKLPF
110 120 130 140 150
PIIDDKDRDL AILLGMLDPA EKDEKGMPVT ARVVFIFGPD KKLKLSILYP
160 170 180 190 200
ATTGRNFDEI LRVVDSLQLT ASNPVATPVD WKKGESVMVL PTLPEEEAKQ
210 220
LFPKGVFTKE LPSGKKYLRY TPQP
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AF014009 mRNA Translation: AAB66341.1 Y17295 mRNA Translation: CAA76732.1 |
RefSeqi | NP_446028.1, NM_053576.2 |
Genome annotation databases
Ensembli | ENSRNOT00000034583; ENSRNOP00000030323; ENSRNOG00000002896 |
GeneIDi | 94167 |
KEGGi | rno:94167 |
UCSCi | RGD:71005 rat |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AF014009 mRNA Translation: AAB66341.1 Y17295 mRNA Translation: CAA76732.1 |
RefSeqi | NP_446028.1, NM_053576.2 |
3D structure databases
SMRi | O35244 |
ModBasei | Search... |
Protein-protein interaction databases
BioGridi | 250165, 3 interactors |
IntActi | O35244, 4 interactors |
STRINGi | 10116.ENSRNOP00000030323 |
Protein family/group databases
PeroxiBasei | 4427 Rno1CysPrx |
PTM databases
iPTMneti | O35244 |
PhosphoSitePlusi | O35244 |
SwissPalmi | O35244 |
2D gel databases
World-2DPAGEi | 0004:O35244 |
Proteomic databases
jPOSTi | O35244 |
PaxDbi | O35244 |
PRIDEi | O35244 |
Genome annotation databases
Ensembli | ENSRNOT00000034583; ENSRNOP00000030323; ENSRNOG00000002896 |
GeneIDi | 94167 |
KEGGi | rno:94167 |
UCSCi | RGD:71005 rat |
Organism-specific databases
CTDi | 9588 |
RGDi | 71005 Prdx6 |
Phylogenomic databases
eggNOGi | KOG0854 Eukaryota COG0450 LUCA |
GeneTreei | ENSGT00550000074794 |
HOGENOMi | HOG000022346 |
InParanoidi | O35244 |
KOi | K11188 |
OMAi | IPLTCRA |
OrthoDBi | 1129256at2759 |
PhylomeDBi | O35244 |
TreeFami | TF105183 |
Enzyme and pathway databases
BRENDAi | 1.11.1.15 5301 |
Reactomei | R-RNO-3299685 Detoxification of Reactive Oxygen Species R-RNO-6798695 Neutrophil degranulation |
Miscellaneous databases
PROi | PR:O35244 |
Gene expression databases
Bgeei | ENSRNOG00000002896 Expressed in 10 organ(s), highest expression level in lung |
Genevisiblei | O35244 RN |
Family and domain databases
Gene3Di | 3.40.30.10, 1 hit |
InterProi | View protein in InterPro IPR000866 AhpC/TSA IPR024706 Peroxiredoxin_AhpC-typ IPR019479 Peroxiredoxin_C IPR036249 Thioredoxin-like_sf IPR013766 Thioredoxin_domain |
Pfami | View protein in Pfam PF10417 1-cysPrx_C, 1 hit PF00578 AhpC-TSA, 1 hit |
PIRSFi | PIRSF000239 AHPC, 1 hit |
SUPFAMi | SSF52833 SSF52833, 1 hit |
PROSITEi | View protein in PROSITE PS51352 THIOREDOXIN_2, 1 hit |
ProtoNeti | Search... |
MobiDBi | Search... |
Entry informationi
Entry namei | PRDX6_RAT | |
Accessioni | O35244Primary (citable) accession number: O35244 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | July 15, 1999 |
Last sequence update: | January 23, 2007 | |
Last modified: | November 13, 2019 | |
This is version 160 of the entry and version 3 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Chordata Protein Annotation Program |
Miscellaneousi
Keywords - Technical termi
Complete proteome, Direct protein sequencing, Reference proteomeDocuments
- SIMILARITY comments
Index of protein domains and families