UniProtKB - Q72NR4 (TPX_LEPIC)
Protein
Thiol peroxidase
Gene
tpx
Organism
Leptospira interrogans serogroup Icterohaemorrhagiae serovar copenhageni (strain Fiocruz L1-130)
Status
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.UniRule annotation
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 atypical 2-Cys peroxiredoxin, C(R) is present in the same subunit to form an intramolecular disulfide. The disulfide is subsequently reduced by thioredoxin.UniRule annotation
Catalytic activityi
- [thioredoxin]-dithiol + a hydroperoxide = [thioredoxin]-disulfide + an alcohol + H2OUniRule annotationEC:1.11.1.24UniRule annotation
Sites
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Active sitei | 60 | Cysteine sulfenic acid (-SOH) intermediateUniRule annotation | 1 |
GO - Molecular functioni
- thioredoxin peroxidase activity Source: UniProtKB-UniRule
Keywordsi
Molecular function | Antioxidant, Oxidoreductase, Peroxidase |
Names & Taxonomyi
Protein namesi | Recommended name: Thiol peroxidaseUniRule annotation (EC:1.11.1.24UniRule annotation)Short name: TpxUniRule annotation Alternative name(s): Peroxiredoxin tpxUniRule annotation Short name: PrxUniRule annotation Thioredoxin peroxidaseUniRule annotation Thioredoxin-dependent peroxiredoxinUniRule annotation |
Gene namesi | Name:tpxUniRule annotation Ordered Locus Names:LIC_12765 |
Organismi | Leptospira interrogans serogroup Icterohaemorrhagiae serovar copenhageni (strain Fiocruz L1-130) |
Taxonomic identifieri | 267671 [NCBI] |
Taxonomic lineagei | Bacteria › Spirochaetes › Leptospirales › Leptospiraceae › Leptospira › |
Proteomesi |
|
PTM / Processingi
Molecule processing
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
ChainiPRO_0000187883 | 1 – 171 | Thiol peroxidaseAdd BLAST | 171 |
Amino acid modifications
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Disulfide bondi | 60 ↔ 94 | Redox-activeUniRule annotation |
Keywords - PTMi
Disulfide bondProteomic databases
PaxDbi | Q72NR4 |
Interactioni
Subunit structurei
Homodimer.
UniRule annotationFamily & Domainsi
Domains and Repeats
Feature key | Position(s) | DescriptionActions | Graphical view | Length |
---|---|---|---|---|
Domaini | 18 – 169 | ThioredoxinUniRule annotationAdd BLAST | 152 |
Sequence similaritiesi
Keywords - Domaini
Redox-active centerPhylogenomic databases
HOGENOMi | CLU_042529_12_2_12 |
OMAi | ITQEPNY |
Family and domain databases
CDDi | cd03014, PRX_Atyp2cys, 1 hit |
Gene3Di | 3.40.30.10, 1 hit |
HAMAPi | MF_00269, Tpx, 1 hit |
InterProi | View protein in InterPro IPR013740, Redoxin IPR036249, Thioredoxin-like_sf IPR013766, Thioredoxin_domain IPR002065, TPX IPR018219, Tpx_CS |
Pfami | View protein in Pfam PF08534, Redoxin, 1 hit |
SUPFAMi | SSF52833, SSF52833, 1 hit |
PROSITEi | View protein in PROSITE PS51352, THIOREDOXIN_2, 1 hit PS01265, TPX, 1 hit |
i Sequence
Sequence statusi: Complete.
Q72NR4-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
MTKVTLKGNP VQLEGKIPSP GDKAPDFKAI KQDLSEFSLK DYAGKVKILV
60 70 80 90 100
AVPSLDTSVC ALETKAFNEK AAGISGVTTL VISGDLPFAM GRFCSTEGIN
110 120 130 140 150
SPNLVTGSQY RDFSFSKAYG THIADGPLKG LSARAVFVLD KSDTVRYVEI
160 170
VPEITTEPNY TAAIAAANAA L
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AE016823 Genomic DNA Translation: AAS71322.1 |
RefSeqi | WP_000170133.1, NC_005823.1 |
Genome annotation databases
EnsemblBacteriai | AAS71322; AAS71322; LIC_12765 |
GeneIDi | 58393915 |
KEGGi | lic:LIC_12765 |
Similar proteinsi
Cross-referencesi
Sequence databases
Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AE016823 Genomic DNA Translation: AAS71322.1 |
RefSeqi | WP_000170133.1, NC_005823.1 |
3D structure databases
SMRi | Q72NR4 |
ModBasei | Search... |
Proteomic databases
PaxDbi | Q72NR4 |
Genome annotation databases
EnsemblBacteriai | AAS71322; AAS71322; LIC_12765 |
GeneIDi | 58393915 |
KEGGi | lic:LIC_12765 |
Phylogenomic databases
HOGENOMi | CLU_042529_12_2_12 |
OMAi | ITQEPNY |
Family and domain databases
CDDi | cd03014, PRX_Atyp2cys, 1 hit |
Gene3Di | 3.40.30.10, 1 hit |
HAMAPi | MF_00269, Tpx, 1 hit |
InterProi | View protein in InterPro IPR013740, Redoxin IPR036249, Thioredoxin-like_sf IPR013766, Thioredoxin_domain IPR002065, TPX IPR018219, Tpx_CS |
Pfami | View protein in Pfam PF08534, Redoxin, 1 hit |
SUPFAMi | SSF52833, SSF52833, 1 hit |
PROSITEi | View protein in PROSITE PS51352, THIOREDOXIN_2, 1 hit PS01265, TPX, 1 hit |
ProtoNeti | Search... |
MobiDBi | Search... |
Entry informationi
Entry namei | TPX_LEPIC | |
Accessioni | Q72NR4Primary (citable) accession number: Q72NR4 | |
Entry historyi | Integrated into UniProtKB/Swiss-Prot: | August 30, 2005 |
Last sequence update: | July 5, 2004 | |
Last modified: | April 7, 2021 | |
This is version 97 of the entry and version 1 of the sequence. See complete history. | ||
Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
Annotation program | Prokaryotic Protein Annotation Program |