Gene Information
Gene NameCD8B
OrganismHomo sapiens (Human)
Gene Length210
Protein NamesT-cell surface glycoprotein CD8 beta chain (CD antigen CD8b)
Target NameNA
Target TypeNA
Gene Age454 ( ENSG00000172116 )
Evolutionary StageVertebrata
AlphaFoldDBP10966
Gene CardCD8B
Uniprot IDP10966
PfamPF07686
In ASDno
Allosteric Predictionno (-0.868696093)
Ortholog in AnimalsAlpaca_ CD8B ( ortholog_one2many )
Mouse_ Cd8b1 ( ortholog_one2many )
Rat_ Cd8b ( ortholog_one2many )
OhnologsNA
ParalogsCD8B2
TissueNA
Tissue SpecificityIsoform 1, isoform 3, isoform 5, isoform 6, isoform 7 and isoform 8 are expressed in both thymus and peripheral CD8+ T-cells. Expression of isoform 1 is higher in thymus CD8+ T-cells than in peripheral CD8+ T-cells. Expression of isoform 6 is higher in peripheral CD8+ T-cells than in thymus CD8+ T-cells. {ECO:0000269|PubMed:8436166}.
Pharmacological Animal ModelsNULL(Chimpanzee);NULL(Mouse);0.005990(Rat);NULL(Rabbit)
Gene Ontology
(biological process)
Gene Ontology
(cellular component)
Gene Ontology
(molecular function)
PDB NA 
DBSNP NA 
Subcellular location [CC][Isoform 1]: Cell membrane {ECO:0000269|PubMed:11714755, ECO:0000269|PubMed:3145196};
Single-pass type I membrane protein {ECO:0000305}. Note=Requires the partner CD8A for efficient cell surface expression (PubMed:3145196). The heterodimer CD8A/CD8B localizes to lipid rafts due to CD8B cytoplasmic tail palmitoylation. {ECO:0000269|PubMed:10925291, ECO:0000269|PubMed:11714755, ECO:0000269|PubMed:3145196}.;
[Isoform 2]: Cell membrane {ECO:0000305};
Single-pass type I membrane protein {ECO:0000305}.;
[Isoform 3]: Secreted {ECO:0000305}.;
[Isoform 4]: Cell membrane {ECO:0000305};
Single-pass type I membrane protein {ECO:0000305}.;
[Isoform 5]: Cell membrane {ECO:0000305};
Single-pass type I membrane protein {ECO:0000305}.;
[Isoform 6]: Secreted {ECO:0000305}.;
[Isoform 7]: Secreted {ECO:0000305}.;
[Isoform 8]: Secreted {ECO:0000305}.
Mouse PG classificationNA
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