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Entry version 113 (12 Aug 2020)
Sequence version 2 (15 Dec 2009)
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Protein

POU domain, class 3, transcription factor 1-A

Gene

pou3f1-a

Organism
Xenopus laevis (African clawed frog)
Status
Reviewed-Annotation score:

Annotation score:4 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 transcript 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

Acts as a transcription factor (By similarity). May play a role in neuronal differentiation (PubMed:1717323).By similarity1 Publication

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section specifies the position and type of each DNA-binding domain present within the protein.<p><a href='/help/dna_bind' target='_top'>More...</a></p>DNA bindingi286 – 345HomeoboxPROSITE-ProRule annotationAdd BLAST60

<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 functionDevelopmental protein, DNA-binding
Biological processNeurogenesis, Transcription, Transcription regulation

<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%5Fand%5Ftaxonomy%5Fsection">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:
POU domain, class 3, transcription factor 1-A
Alternative name(s):
Homeotic protein NRL-22
Short name:
XlNRL-22
Transcription factor POU1
Short name:
XlPOU 1
Short name:
XlPOU1
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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:pou3f1-a
Synonyms:nrl-22, pou1, pou50
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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>OrganismiXenopus laevis (African clawed frog)
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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 identifieri8355 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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 lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiAmphibiaBatrachiaAnuraPipoideaPipidaeXenopodinaeXenopusXenopus

Organism-specific databases

Xenopus laevis and tropicalis biology and genomics resource

More...
Xenbasei
XB-GENE-6254450, pou3f1.S

<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 Cytoskeleton Lysosome Endosome Peroxisome ER Golgi apparatus Nucleus Mitochondrion Manual annotation Automatic computational assertionGraphics by Christian Stolte & Seán O’Donoghue; Source: COMPARTMENTS

Keywords - Cellular componenti

Nucleus

<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 or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00001007641 – 375POU domain, class 3, transcription factor 1-AAdd BLAST375

<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

In embryos at the neural fold stage, localized primarily in the anterior neural plate, and localized mostly in the anterior region of the nerve cord of neurula stage embryos. In tailbud stages, expressed predominantly in the eye and brain, with weak expression along the length of the nerve cord. In adults, expressed in skin and brain.1 Publication

<p>This subsection of the 'Expression' section provides information on the expression of the gene product at various stages of a cell, tissue or organism development. By default, the information is derived from experiments at the mRNA level, unless specified 'at the protein level'.<p><a href='/help/developmental_stage' target='_top'>More...</a></p>Developmental stagei

Embryonic expression begins at the neural plate stage and continues throughout development to adulthood.1 Publication

<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

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SMRi
P31363

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%5Fand%5Fdomains%5Fsection">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>Domaini194 – 268POU-specificPROSITE-ProRule annotationAdd BLAST75

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes the position of regions of compositional bias within the protein and the particular amino acids that are over-represented within those regions.<p><a href='/help/compbias' target='_top'>More...</a></p>Compositional biasi100 – 191His-richAdd BLAST92

<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

Keywords - Domaini

Homeobox

Phylogenomic databases

KEGG Orthology (KO)

More...
KOi
K09365

Database of Orthologous Groups

More...
OrthoDBi
752252at2759

Family and domain databases

Conserved Domains Database

More...
CDDi
cd00086, homeodomain, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.10.260.40, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR009057, Homeobox-like_sf
IPR017970, Homeobox_CS
IPR001356, Homeobox_dom
IPR010982, Lambda_DNA-bd_dom_sf
IPR013847, POU
IPR000327, POU_dom
IPR016362, TF_POU_3

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00046, Homeodomain, 1 hit
PF00157, Pou, 1 hit

PIRSF; a whole-protein classification database

More...
PIRSFi
PIRSF002629, Transcription_factor_POU, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00028, POUDOMAIN

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00389, HOX, 1 hit
SM00352, POU, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF46689, SSF46689, 1 hit
SSF47413, SSF47413, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00027, HOMEOBOX_1, 1 hit
PS50071, HOMEOBOX_2, 1 hit
PS00035, POU_1, 1 hit
PS00465, POU_2, 1 hit
PS51179, POU_3, 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%5Flength">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>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">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.

P31363-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MAATAQYLPR NNSLPSNPLM HPDSDRMHQG TTYREVQKMM HQEYLQGLAT
60 70 80 90 100
NAGHHMSLTP HQWLPNPASD WGSGSHLGVQ AEHAKSGVQS NREDLSSGFH
110 120 130 140 150
HHRSHLVHQQ SPSSHAWAQS GGHHLAPMSP SSNSHQPLIY SQSSYTNLNG
160 170 180 190 200
MLGPQASSLH HSMRDPLHDD PGVHDTQVDS PPQHLGHHQD HSDEDAPSSD
210 220 230 240 250
DLEQFAKQFK QRRIKLGFTQ ADVGLALGTL YGNVFSQTTI CRFEALQLSF
260 270 280 290 300
KNMCKLKPLL NKWLEETDST TGSPTNLDKI AAQGRKRKKR TSIEVGVKGA
310 320 330 340 350
LENHFLKCPK PSAHEITSLA DSLQLEKEVV RVWFCNRRQK EKRMTPAGVP
360 370
HPPMEDVYSQ AETPPLHHTL QTSVQ
Length:375
Mass (Da):41,846
Last modified:December 15, 2009 - v2
<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:i55E494F7ECC86EAA
GO

<p>This subsection of the 'Sequence' section reports difference(s) between the protein sequence shown in the UniProtKB entry and other available protein sequences derived from the same gene.<p><a href='/help/sequence_caution' target='_top'>More...</a></p>Sequence cautioni

The sequence AAH43847 differs from that shown. Reason: Erroneous initiation.Curated
The sequence CAA41782 differs from that shown. Reason: Erroneous initiation.Curated

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section reports difference(s) between the canonical sequence (displayed by default in the entry) and the different sequence submissions merged in the entry. These various submissions may originate from different sequencing projects, different types of experiments, or different biological samples. Sequence conflicts are usually of unknown origin.<p><a href='/help/conflict' target='_top'>More...</a></p>Sequence conflicti7 – 10YLPR → LLPW in CAA41782 (PubMed:1717323).Curated4

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
BC043847 mRNA Translation: AAH43847.1 Different initiation.
X59056 mRNA Translation: CAA41782.1 Different initiation.
X54682 mRNA Translation: CAA38496.1

Protein sequence database of the Protein Information Resource

More...
PIRi
S12183
S23248

NCBI Reference Sequences

More...
RefSeqi
NP_001158054.1, NM_001164582.2

Genome annotation databases

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
394338

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
xla:394338

<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
BC043847 mRNA Translation: AAH43847.1 Different initiation.
X59056 mRNA Translation: CAA41782.1 Different initiation.
X54682 mRNA Translation: CAA38496.1
PIRiS12183
S23248
RefSeqiNP_001158054.1, NM_001164582.2

3D structure databases

SMRiP31363
ModBaseiSearch...

Genome annotation databases

GeneIDi394338
KEGGixla:394338

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
394338
XenbaseiXB-GENE-6254450, pou3f1.S

Phylogenomic databases

KOiK09365
OrthoDBi752252at2759

Family and domain databases

CDDicd00086, homeodomain, 1 hit
Gene3Di1.10.260.40, 1 hit
InterProiView protein in InterPro
IPR009057, Homeobox-like_sf
IPR017970, Homeobox_CS
IPR001356, Homeobox_dom
IPR010982, Lambda_DNA-bd_dom_sf
IPR013847, POU
IPR000327, POU_dom
IPR016362, TF_POU_3
PfamiView protein in Pfam
PF00046, Homeodomain, 1 hit
PF00157, Pou, 1 hit
PIRSFiPIRSF002629, Transcription_factor_POU, 1 hit
PRINTSiPR00028, POUDOMAIN
SMARTiView protein in SMART
SM00389, HOX, 1 hit
SM00352, POU, 1 hit
SUPFAMiSSF46689, SSF46689, 1 hit
SSF47413, SSF47413, 1 hit
PROSITEiView protein in PROSITE
PS00027, HOMEOBOX_1, 1 hit
PS50071, HOMEOBOX_2, 1 hit
PS00035, POU_1, 1 hit
PS00465, POU_2, 1 hit
PS51179, POU_3, 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 nameiP3F1A_XENLA
<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: P31363
Secondary accession number(s): P20915, Q7ZYC6
<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%5Fand%5Fisoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: July 1, 1993
Last sequence update: December 15, 2009
Last modified: August 12, 2020
This is version 113 of the entry and version 2 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 programChordata 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

Documents

  1. SIMILARITY comments
    Index of protein domains and families
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