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Entry version 137 (18 Sep 2019)
Sequence version 1 (01 Nov 1999)
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Protein

Peroxiredoxin-2B

Gene

PRXIIB

Organism
Arabidopsis thaliana (Mouse-ear cress)
Status
Reviewed-Annotation score:

Annotation score:5 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>
-Experimental evidence at protein leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the ‘protein existence’ evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Reduces hydrogen peroxide and alkyl hydroperoxides with reducing equivalents provided through the thioredoxin or glutaredoxin system. May be involved in intracellular redox signaling.1 Publication
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.1 Publication

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 glutaredoxin (Grx).1 Publication

<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes.<p><a href='/help/catalytic_activity' target='_top'>More...</a></p>Catalytic activityi

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> section is used for enzymes and indicates the residues directly involved in catalysis.<p><a href='/help/act_site' target='_top'>More...</a></p>Active sitei51Cysteine sulfenic acid (-SOH) intermediateBy similarity1

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

GO - Biological processi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionAntioxidant, Oxidoreductase, Peroxidase

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...
BioCyci
ARA:AT1G65980-MONOMER

Protein family/group databases

PeroxiBase, a peroxidase database

More...
PeroxiBasei
14571 HaPNC17
4344 AtPrxII02

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Peroxiredoxin-2B (EC:1.11.1.15)
Alternative name(s):
Peroxiredoxin IIB
Peroxiredoxin TPx1
Thioredoxin peroxidase 2B
Thioredoxin-dependent peroxidase 1
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: ‘Name’, ‘Synonyms’, ‘Ordered locus names’ and ‘ORF names’.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:PRXIIB
Synonyms:TPX1
Ordered Locus Names:At1g65980
ORF Names:F12P19.14
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiArabidopsis thaliana (Mouse-ear cress)
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the ‘taxonomic identifier’ or ‘taxid’.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri3702 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliopsidaeudicotyledonsGunneridaePentapetalaerosidsmalvidsBrassicalesBrassicaceaeCamelineaeArabidopsis
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000006548 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes_manual">proteome</a> can consist of several components. <br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome 1

Organism-specific databases

Arabidopsis Information Portal

More...
Araporti
AT1G65980

The Arabidopsis Information Resource

More...
TAIRi
locus:2009719 AT1G65980

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Extracellular region or secreted Cytosol Plasma membrane Cell wall Cytoskeleton Vacuole Chloroplast Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertion Graphics by Christian Stolte & Seán O’Donoghue; Source: COMPARTMENTS

Keywords - Cellular componenti

Cytoplasm

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘PTM / Processing’ section describes the extent of a polypeptide chain in the mature protein following processing.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00002822791 – 162Peroxiredoxin-2BAdd BLAST162

Proteomic databases

PaxDb, a database of protein abundance averages across all three domains of life

More...
PaxDbi
Q9XEX2

PRoteomics IDEntifications database

More...
PRIDEi
Q9XEX2

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

<p>This subsection of the ‘Expression’ section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms. By default, the information is derived from experiments at the mRNA level, unless specified ‘at protein level’. <br></br>Examples: <a href="http://www.uniprot.org/uniprot/P92958#expression">P92958</a>, <a href="http://www.uniprot.org/uniprot/Q8TDN4#expression">Q8TDN4</a>, <a href="http://www.uniprot.org/uniprot/O14734#expression">O14734</a><p><a href='/help/tissue_specificity' target='_top'>More...</a></p>Tissue specificityi

Expressed in all tissues but mostly in reproductive tissues such as buds, flowers, siliques and seeds.2 Publications

<p>This subsection of the ‘Expression’ section reports the experimentally proven effects of inducers and repressors (usually chemical compounds or environmental factors) on the level of protein (or mRNA) expression (up-regulation, down-regulation, constitutive expression).<p><a href='/help/induction' target='_top'>More...</a></p>Inductioni

Slightly induced by salt stress.1 Publication

Gene expression databases

ExpressionAtlas, Differential and Baseline Expression

More...
ExpressionAtlasi
Q9XEX2 baseline and differential

Genevisible search portal to normalized and curated expression data from Genevestigator

More...
Genevisiblei
Q9XEX2 AT

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction_section">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Monomer.

2 Publications

Protein-protein interaction databases

Protein interaction database and analysis system

More...
IntActi
Q9XEX2, 2 interactors

Molecular INTeraction database

More...
MINTi
Q9XEX2

STRING: functional protein association networks

More...
STRINGi
3702.AT1G65980.1

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

3D structure databases

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...
SMRi
Q9XEX2

Database of comparative protein structure models

More...
ModBasei
Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family_and_domains_section">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini4 – 162ThioredoxinPROSITE-ProRule annotationAdd BLAST159

<p>This subsection of the ‘Family and domains’ section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Belongs to the peroxiredoxin family. Prx5 subfamily.Curated

Keywords - Domaini

Redox-active center

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
KOG0541 Eukaryota
COG0678 LUCA

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
HOG000255884

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
Q9XEX2

Identification of Orthologs from Complete Genome Data

More...
OMAi
QRYAMVV

Database of Orthologous Groups

More...
OrthoDBi
1281610at2759

Database for complete collections of gene phylogenies

More...
PhylomeDBi
Q9XEX2

Family and domain databases

Conserved Domains Database

More...
CDDi
cd03013 PRX5_like, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR037944 PRX5-like
IPR013740 Redoxin
IPR036249 Thioredoxin-like_sf
IPR013766 Thioredoxin_domain

The PANTHER Classification System

More...
PANTHERi
PTHR10430 PTHR10430, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF08534 Redoxin, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF52833 SSF52833, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS51352 THIOREDOXIN_2, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequence (1+)i

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

This entry describes 1 <p>This subsection of the ‘Sequence’ section lists the alternative protein sequences (isoforms) that can be generated from the same gene by a single or by the combination of up to four biological events (alternative promoter usage, alternative splicing, alternative initiation and ribosomal frameshifting). Additionally, this section gives relevant information on each alternative protein isoform.<p><a href='/help/alternative_products' target='_top'>More...</a></p> isoform i produced by alternative splicing. AlignAdd to basket
Note: A number of isoforms are produced. According to EST sequences.

This entry has 1 described isoform and 1 potential isoform that is computationally mapped.Show allAlign All

Isoform 1 (identifier: Q9XEX2-1) [UniParc]FASTAAdd to basket

This isoform has been chosen as the <div> <p><b>What is the canonical sequence?</b><p><a href='/help/canonical_and_isoforms' target='_top'>More...</a></p>canonicali sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.

« Hide
        10         20         30         40         50
MAPIAVGDVV PDGTISFFDE NDQLQTASVH SLAAGKKVIL FGVPGAFTPT
60 70 80 90 100
CSMKHVPGFI EKAEELKSKG VDEIICFSVN DPFVMKAWGK TYPENKHVKF
110 120 130 140 150
VADGSGEYTH LLGLELDLKD KGLGVRSRRF ALLLDDLKVT VANVESGGEF
160
TVSSADDILK AL
Length:162
Mass (Da):17,428
Last modified:November 1, 1999 - v1
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:i6EB4690D17598814
GO

<p>In eukaryotic reference proteomes, unreviewed entries that are likely to belong to the same gene are computationally mapped, based on gene identifiers from Ensembl, EnsemblGenomes and model organism databases.<p><a href='/help/gene_centric_isoform_mapping' target='_top'>More...</a></p>Computationally mapped potential isoform sequencesi

There is 1 potential isoform mapped to this entry.BLASTAlignShow allAdd to basket
EntryEntry nameProtein names
Gene namesLengthAnnotation
F4ID64F4ID64_ARATH
Thioredoxin-dependent peroxidase 1
TPX1 PEROXIREDOXIN TPX1, At1g65980, F12P19.14, F12P19_14
87Annotation score:

Annotation score:1 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

More...
GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
AF121355 mRNA Translation: AAD28242.1
AC009513 Genomic DNA Translation: AAF06058.1
CP002684 Genomic DNA Translation: AEE34447.1
AF332464 mRNA Translation: AAG48827.1
AY065056 mRNA Translation: AAL57690.1

Protein sequence database of the Protein Information Resource

More...
PIRi
B96684
PA0022

NCBI Reference Sequences

More...
RefSeqi
NP_176773.1, NM_105270.3 [Q9XEX2-1]

Genome annotation databases

Ensembl plant genome annotation project

More...
EnsemblPlantsi
AT1G65980.1; AT1G65980.1; AT1G65980 [Q9XEX2-1]

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
842910

Gramene; a comparative resource for plants

More...
Gramenei
AT1G65980.1; AT1G65980.1; AT1G65980 [Q9XEX2-1]

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ath:AT1G65980

Keywords - Coding sequence diversityi

Alternative splicing

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF121355 mRNA Translation: AAD28242.1
AC009513 Genomic DNA Translation: AAF06058.1
CP002684 Genomic DNA Translation: AEE34447.1
AF332464 mRNA Translation: AAG48827.1
AY065056 mRNA Translation: AAL57690.1
PIRiB96684
PA0022
RefSeqiNP_176773.1, NM_105270.3 [Q9XEX2-1]

3D structure databases

SMRiQ9XEX2
ModBaseiSearch...

Protein-protein interaction databases

IntActiQ9XEX2, 2 interactors
MINTiQ9XEX2
STRINGi3702.AT1G65980.1

Protein family/group databases

PeroxiBasei14571 HaPNC17
4344 AtPrxII02

Proteomic databases

PaxDbiQ9XEX2
PRIDEiQ9XEX2

Genome annotation databases

EnsemblPlantsiAT1G65980.1; AT1G65980.1; AT1G65980 [Q9XEX2-1]
GeneIDi842910
GrameneiAT1G65980.1; AT1G65980.1; AT1G65980 [Q9XEX2-1]
KEGGiath:AT1G65980

Organism-specific databases

AraportiAT1G65980
TAIRilocus:2009719 AT1G65980

Phylogenomic databases

eggNOGiKOG0541 Eukaryota
COG0678 LUCA
HOGENOMiHOG000255884
InParanoidiQ9XEX2
OMAiQRYAMVV
OrthoDBi1281610at2759
PhylomeDBiQ9XEX2

Enzyme and pathway databases

BioCyciARA:AT1G65980-MONOMER

Miscellaneous databases

Protein Ontology

More...
PROi
PR:Q9XEX2

Gene expression databases

ExpressionAtlasiQ9XEX2 baseline and differential
GenevisibleiQ9XEX2 AT

Family and domain databases

CDDicd03013 PRX5_like, 1 hit
InterProiView protein in InterPro
IPR037944 PRX5-like
IPR013740 Redoxin
IPR036249 Thioredoxin-like_sf
IPR013766 Thioredoxin_domain
PANTHERiPTHR10430 PTHR10430, 1 hit
PfamiView protein in Pfam
PF08534 Redoxin, 1 hit
SUPFAMiSSF52833 SSF52833, 1 hit
PROSITEiView protein in PROSITE
PS51352 THIOREDOXIN_2, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
Search...

MobiDB: a database of protein disorder and mobility annotations

More...
MobiDBi
Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the ‘Entry information’ section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiPRX2B_ARATH
<p>This subsection of the ‘Entry information’ section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called ‘Primary (citable) accession number’.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: Q9XEX2
<p>This subsection of the ‘Entry information’ section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification (‘Last modified’). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: April 3, 2007
Last sequence update: November 1, 1999
Last modified: September 18, 2019
This is version 137 of the entry and version 1 of the sequence. See complete history.
<p>This subsection of the ‘Entry information’ section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

<p>This section contains any relevant information that doesn’t fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families
  2. Arabidopsis thaliana
    Arabidopsis thaliana: entries and gene names
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