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UniProtKB/Swiss-Prot entry P21994


[Entry info] [Name and origin] [References] [Comments] [Cross-references] [Keywords] [Features] [Sequence] [Tools]

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Entry information
Entry name CXB2_RAT
Primary accession number P21994
Secondary accession numbers None
Integrated into Swiss-Prot on August 1, 1991
Sequence was last modified on August 1, 1991 (Sequence version 1)
Annotations were last modified on    June 16, 2009 (Entry version 76)
Name and origin of the protein
Protein name Gap junction beta-2 protein
Synonyms Connexin-26
Cx26
Gene name
Name: Gjb2
Synonyms: Cxn-26
From
Rattus norvegicus (Rat) [TaxID: 10116] 
Taxonomy Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Glires; Rodentia; Sciurognathi; Muroidea; Muridae; Murinae; Rattus.
Protein existence 1: Evidence at protein level;
References
[1]
NUCLEOTIDE SEQUENCE [MRNA].
TISSUE=Liver;
DOI=10.1083/jcb.109.6.3391; PubMed=2557354 [NCBI, ExPASy, EBI, Israel, Japan]
Zhang J.T., Nicholson B.J.;
"Sequence and tissue distribution of a second protein of hepatic gap junctions, Cx26, as deduced from its cDNA.";
J. Cell Biol. 109:3391-3401(1989).
[2]
NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
TISSUE=Kidney;
DOI=10.1101/gr.2596504; PubMed=15489334 [NCBI, ExPASy, EBI, Israel, Japan]
The MGC Project Team;
"The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC).";
Genome Res. 14:2121-2127(2004).
[3]
PROTEIN SEQUENCE OF 1-18.
DOI=10.1038/329732a0; PubMed=2823143 [NCBI, ExPASy, EBI, Israel, Japan]
Nicholson B.J., Dermietzel R., Teplow D., Traub O., Willecke K., Revel J.-P.;
"Two homologous protein components of hepatic gap junctions.";
Nature 329:732-734(1987).
Comments
  • FUNCTION: One gap junction consists of a cluster of closely packed pairs of transmembrane channels, the connexons, through which materials of low MW diffuse from one cell to a neighboring cell.
  • SUBUNIT: A connexon is composed of a hexamer of connexins.
  • SUBCELLULAR LOCATION: Cell membrane; Multi-pass membrane protein. Cell junction, gap junction.
  • TISSUE SPECIFICITY: Liver, kidney, intestine, lung, spleen, stomach, testis and brain, but not heart and adult skeletal muscle.
  • SIMILARITY: Belongs to the connexin family. Beta-type (group I) subfamily.
Copyright
Copyrighted by the UniProt Consortium, see http://www.uniprot.org/terms. Distributed under the Creative Commons Attribution-NoDerivs License.
Cross-references
Sequence databases
EMBL
BC078952; AAH78952.1; -; mRNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
IPI IPI00208534; -.
PIR A33646; A33646.
RefSeq NP_001004099.1; -.
UniGene Rn.219269
3D structure databases
ModBase P21994.
Organism-specific databases
RGD 728891; Gjb2.
Gene expression databases
ArrayExpress P21994; -.
GermOnline ENSRNOG00000008855; Rattus norvegicus.
Ontologies
GO
GO:0005922; Cellular component: connexon complex (inferred from electronic annotation from InterPro).
GO:0016021; Cellular component: integral to membrane (inferred from electronic annotation from UniProtKB-KW).
GO:0016328; Cellular component: lateral plasma membrane (inferred from direct assay from RGD).
GO:0005243; Molecular function: gap junction channel activity (traceable author statement from RGD).
GO:0007267; Biological process: cell-cell signaling (traceable author statement from RGD).
GO:0030539; Biological process: male genitalia development (inferred from expression pattern from RGD).
QuickGo view.
Family and domain databases
InterPro IPR000500; Connexin.
IPR002268; Connexin26.
IPR019570; Connexin_CCC.
IPR017990; Connexin_CS.
IPR013092; Connexin_N.
IPR017991; connexins_rgn.
Graphical view of domain structure.
PANTHER PTHR11984; Connexin; 1.
PTHR11984:SF24; Connexin26; 1.
Pfam PF00029; Connexin; 1.
PF10582; Connexin_CCC; 1.
Pfam graphical view of domain structure.
PRINTS PR00206; CONNEXIN.
PR01139; CONNEXINB2.
SMART SM00037; CNX; 1.
SMART graphical view of domain structure.
PROSITE PS00407; CONNEXINS_1; 1.
PS00408; CONNEXINS_2; 1.
Genome annotation databases
Ensembl ENSRNOG00000008855; Rattus norvegicus. [Contig view]
GeneID 394266; -.
KEGG rno:394266; -.
Phylogenomic databases
HOVERGEN P21994; -.
OMA P21994; MYVFYIM.
Other
NextBio 692713; -.
ProtoNet P21994.
UniRef View cluster of proteins with at least 50% / 90% / 100% identity.
Keywords
Cell junction; Cell membrane; Direct protein sequencing; Gap junction; Hearing; Membrane; Transmembrane.
Features
SEVIEWER logo Feature table viewer FT aligner logo Feature aligner
KeyFrom   To Length Description FTId
CHAIN   1   226  226     Gap junction beta-2 protein. PRO_0000057860
TOPO_DOM   1    20  20     Cytoplasmic (Potential). 
TRANSMEM   21    40  20     Potential. 
TOPO_DOM   41    75  35     Extracellular (Potential). 
TRANSMEM   76    98  23     Potential. 
TOPO_DOM   99   139  41     Cytoplasmic (Potential). 
TRANSMEM   140   162  23     Potential. 
TOPO_DOM   163   192  30     Extracellular (Potential). 
TRANSMEM   193   215  23     Potential. 
TOPO_DOM   216   226  11     Cytoplasmic (Potential). 
Sequence information
Length: 226 AA [This is the length of the unprocessed precursor] Molecular weight: 26451 Da [This is the MW of the unprocessed precursor] CRC64: E36EC95F1B235A0D [This is a checksum on the sequence]
        10         20         30         40         50         60 
MDWGTLQSIL GGVNKHSTSI GKIWLTVLFI FRIMILVVAA KEVWGDEQAD FVCNTLQPGC 

        70         80         90        100        110        120 
KNVCYDHYFP ISHIRLWALQ LIMVSTPALL VAMHVAYRRH EKKRKFMKGE IKNEFKDIEE 

       130        140        150        160        170        180 
IKTQKVRIEG SLWWTYTTSI FFRVIFEAVF MYVFYIMYNG FFMQRLVKCN AWPCPNTVDC 

       190        200        210        220 
FISRPTEKTV FTVFMISVSG ICILLNITEL CYLFIRYCSG KSKRPV 

P21994 in FASTA format

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