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Entry version 140 (10 Feb 2021)
Sequence version 1 (01 Feb 1994)
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Protein

Gap junction beta-4 protein

Gene

Gjb4

Organism
Mus musculus (Mouse)
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

Structural component of gap junctions (PubMed:15692151). Gap junctions are dodecameric channels that connect the cytoplasm of adjoining cells. They are formed by the docking of two hexameric hemichannels, one from each cell membrane (By similarity). Small molecules and ions diffuse from one cell to a neighboring cell via the central pore (PubMed:15692151).By similarity1 Publication

<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

  • gap junction channel activity Source: UniProtKB

GO - Biological processi

Enzyme and pathway databases

Reactome - a knowledgebase of biological pathways and processes

More...
Reactomei
R-MMU-190861, Gap junction assembly

<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:
Gap junction beta-4 protein
Alternative name(s):
Connexin-30.31 Publication
Short name:
Cx30.3
<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:Gjb4
Synonyms:Cxn-30.3
<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>OrganismiMus musculus (Mouse)
<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 identifieri10090 [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 lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaMyomorphaMuroideaMuridaeMurinaeMusMus
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">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
  • UP000000589 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes%5Fmanual">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 4

Organism-specific databases

Mouse genome database (MGD) from Mouse Genome Informatics (MGI)

More...
MGIi
MGI:95722, Gjb4

<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

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular%5Flocation%5Fsection">'Subcellular location'</a> section describes the extent of a region that is buried within a membrane, but does not cross it.<p><a href='/help/intramem' target='_top'>More...</a></p>Intramembranei2 – 13By similarityAdd BLAST12
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular%5Flocation%5Fsection">'Subcellular location'</a> section describes the subcellular compartment where each non-membrane region of a membrane-spanning protein is found.<p><a href='/help/topo_dom' target='_top'>More...</a></p>Topological domaini14 – 20CytoplasmicCurated7
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular%5Flocation%5Fsection">'Subcellular location'</a> section describes the extent of a membrane-spanning region of the protein. It denotes the presence of both alpha-helical transmembrane regions and the membrane spanning regions of beta-barrel transmembrane proteins.<p><a href='/help/transmem' target='_top'>More...</a></p>Transmembranei21 – 40HelicalBy similarityAdd BLAST20
Topological domaini41 – 73ExtracellularCuratedAdd BLAST33
Transmembranei74 – 94HelicalBy similarityAdd BLAST21
Topological domaini95 – 130CytoplasmicCuratedAdd BLAST36
Transmembranei131 – 151HelicalBy similarityAdd BLAST21
Topological domaini152 – 184ExtracellularCuratedAdd BLAST33
Transmembranei185 – 205HelicalBy similarityAdd BLAST21
Topological domaini206 – 266CytoplasmicCuratedAdd BLAST61

<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>Keywords - Cellular componenti

Cell junction, Cell membrane, Gap junction, Membrane

<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_00000578661 – 266Gap junction beta-4 proteinAdd BLAST266

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the PTM / Processing":/help/ptm_processing_section section describes the positions of cysteine residues participating in disulfide bonds.<p><a href='/help/disulfid' target='_top'>More...</a></p>Disulfide bondi53 ↔ 175By similarity
Disulfide bondi60 ↔ 169By similarity
Disulfide bondi64 ↔ 164By similarity

Keywords - PTMi

Disulfide bond

Proteomic databases

MaxQB - The MaxQuant DataBase

More...
MaxQBi
Q02738

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

More...
PaxDbi
Q02738

PRoteomics IDEntifications database

More...
PRIDEi
Q02738

PTM databases

Comprehensive resource for the study of protein post-translational modifications (PTMs) in human, mouse and rat.

More...
PhosphoSitePlusi
Q02738

<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

Detected in cochlea (at protein level) (PubMed:15692151). Detected in cochlea (PubMed:15692151). Expressed in skin (PubMed:1512260).2 Publications

<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

Detected in cochlea after 15 dpc. Detected in the spiral limbus in neoneates at 2, 8 and 10 days after birth, before the onset of hearing.1 Publication

Gene expression databases

Bgee dataBase for Gene Expression Evolution

More...
Bgeei
ENSMUSG00000046623, Expressed in lip and 56 other tissues

Genevisible search portal to normalized and curated expression data from Genevestigator

More...
Genevisiblei
Q02738, MM

<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%5Fsection">'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%5Fsection">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

A hemichannel or connexon is composed of a hexamer of connexins. A functional gap junction is formed by the apposition of two hemichannels (By similarity). Forms heteromeric channels with GJB2 (PubMed:15692151).

By similarity1 Publication

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
10090.ENSMUSP00000101696

Miscellaneous databases

RNAct, Protein-RNA interaction predictions for model organisms.

More...
RNActi
Q02738, protein

<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
Q02738

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

<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

Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
ENOG502R3YE, Eukaryota

Ensembl GeneTree

More...
GeneTreei
ENSGT00990000203557

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_037388_4_1_1

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
Q02738

Identification of Orthologs from Complete Genome Data

More...
OMAi
IFHRLYQ

Database of Orthologous Groups

More...
OrthoDBi
955506at2759

Database for complete collections of gene phylogenies

More...
PhylomeDBi
Q02738

TreeFam database of animal gene trees

More...
TreeFami
TF329606

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.20.1440.80, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR000500, Connexin
IPR002270, Connexin-30.3
IPR019570, Connexin_CCC
IPR017990, Connexin_CS
IPR013092, Connexin_N
IPR038359, Connexin_N_sf

The PANTHER Classification System

More...
PANTHERi
PTHR11984, PTHR11984, 1 hit
PTHR11984:SF30, PTHR11984:SF30, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF00029, Connexin, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00206, CONNEXIN
PR01142, CONNEXINB5

Simple Modular Architecture Research Tool; a protein domain database

More...
SMARTi
View protein in SMART
SM00037, CNX, 1 hit
SM01089, Connexin_CCC, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00407, CONNEXINS_1, 1 hit
PS00408, CONNEXINS_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%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.

Q02738-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MNWGFLQGIL SGVNKYSTAL GRIWLSVVFI FRVLVYVVAA EEVWDDDQKD
60 70 80 90 100
FICNTKQPGC PNVCYDEFFP VSHVRLWALQ LILVTCPSLL VVMHVAYREE
110 120 130 140 150
RERKHRLKHG PNAPALYSNL SKKRGGLWWT YLLSLIFKAA VDSGFLYIFH
160 170 180 190 200
CIYKDYDMPR VVACSVTPCP HTVDCYIARP TEKKVFTYFM VVTAAICILL
210 220 230 240 250
NLSEVVYLVG KRCMEVFRPR RRKASRRHQL PDTCPPYVIS KGGHPQDESV
260
ILTKAGMATV DAGVYP
Length:266
Mass (Da):30,389
Last modified:February 1, 1994 - 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:i0772D708C004EFC1
GO

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
M91443 Genomic DNA Translation: AAA37428.1
BC064060 mRNA Translation: AAH64060.1

The Consensus CDS (CCDS) project

More...
CCDSi
CCDS18669.1

Protein sequence database of the Protein Information Resource

More...
PIRi
A43433

NCBI Reference Sequences

More...
RefSeqi
NP_032153.1, NM_008127.4

Genome annotation databases

Ensembl eukaryotic genome annotation project

More...
Ensembli
ENSMUST00000060419; ENSMUSP00000053307; ENSMUSG00000046623
ENSMUST00000106090; ENSMUSP00000101696; ENSMUSG00000046623

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
14621

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
mmu:14621

UCSC genome browser

More...
UCSCi
uc008uuu.1, mouse

<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
M91443 Genomic DNA Translation: AAA37428.1
BC064060 mRNA Translation: AAH64060.1
CCDSiCCDS18669.1
PIRiA43433
RefSeqiNP_032153.1, NM_008127.4

3D structure databases

SMRiQ02738
ModBaseiSearch...

Protein-protein interaction databases

STRINGi10090.ENSMUSP00000101696

PTM databases

PhosphoSitePlusiQ02738

Proteomic databases

MaxQBiQ02738
PaxDbiQ02738
PRIDEiQ02738

Protocols and materials databases

Antibodypedia a portal for validated antibodies

More...
Antibodypediai
17219, 167 antibodies

Genome annotation databases

EnsembliENSMUST00000060419; ENSMUSP00000053307; ENSMUSG00000046623
ENSMUST00000106090; ENSMUSP00000101696; ENSMUSG00000046623
GeneIDi14621
KEGGimmu:14621
UCSCiuc008uuu.1, mouse

Organism-specific databases

Comparative Toxicogenomics Database

More...
CTDi
127534
MGIiMGI:95722, Gjb4

Phylogenomic databases

eggNOGiENOG502R3YE, Eukaryota
GeneTreeiENSGT00990000203557
HOGENOMiCLU_037388_4_1_1
InParanoidiQ02738
OMAiIFHRLYQ
OrthoDBi955506at2759
PhylomeDBiQ02738
TreeFamiTF329606

Enzyme and pathway databases

ReactomeiR-MMU-190861, Gap junction assembly

Miscellaneous databases

BioGRID ORCS database of CRISPR phenotype screens

More...
BioGRID-ORCSi
14621, 0 hits in 17 CRISPR screens

ChiTaRS: a database of human, mouse and fruit fly chimeric transcripts and RNA-sequencing data

More...
ChiTaRSi
Gjb4, mouse

Protein Ontology

More...
PROi
PR:Q02738
RNActiQ02738, protein

The Stanford Online Universal Resource for Clones and ESTs

More...
SOURCEi
Search...

Gene expression databases

BgeeiENSMUSG00000046623, Expressed in lip and 56 other tissues
GenevisibleiQ02738, MM

Family and domain databases

Gene3Di1.20.1440.80, 1 hit
InterProiView protein in InterPro
IPR000500, Connexin
IPR002270, Connexin-30.3
IPR019570, Connexin_CCC
IPR017990, Connexin_CS
IPR013092, Connexin_N
IPR038359, Connexin_N_sf
PANTHERiPTHR11984, PTHR11984, 1 hit
PTHR11984:SF30, PTHR11984:SF30, 1 hit
PfamiView protein in Pfam
PF00029, Connexin, 1 hit
PRINTSiPR00206, CONNEXIN
PR01142, CONNEXINB5
SMARTiView protein in SMART
SM00037, CNX, 1 hit
SM01089, Connexin_CCC, 1 hit
PROSITEiView protein in PROSITE
PS00407, CONNEXINS_1, 1 hit
PS00408, CONNEXINS_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 nameiCXB4_MOUSE
<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: Q02738
<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: February 1, 1994
Last sequence update: February 1, 1994
Last modified: February 10, 2021
This is version 140 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 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

Keywords - Technical termi

Reference proteome

Documents

  1. MGD cross-references
    Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot
  2. SIMILARITY comments
    Index of protein domains and families
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