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- Table of Contents
Facts about T-cell surface glycoprotein CD8 beta chain.
Interacts simultaneously with the T-cell receptor (TCR) and the MHC class I proteins presented by antigen presenting cells (APCs). Consequently, recruits the Src kinase LCK into the area of the TCR-CD3 complex.
Human | |
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Gene Name: | CD8B |
Uniprot: | P10966 |
Entrez: | 926 |
Belongs to: |
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No superfamily |
CD8 antigen, beta polypeptide 1 (p37); CD8 beta; CD8b antigen; CD8b molecule; CD8b; CD8B1; CD8B1P37; Leu2; LY3; LYT3; MGC119115; P37; T lymphocyte surface glycoprotein beta chain; T-cell surface glycoprotein CD8 beta chain
Mass (kDA):
23.722 kDA
Human | |
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Location: | 2p11.2 |
Sequence: | 2; NC_000002.12 (86815337..86861924, complement) |
Isoform 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.
[Isoform 1]: Cell membrane; Single-pass type I membrane protein. 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.; [Isoform 2]: Cell membrane; Single-pass type I membrane protein.; [Isoform 3]: Secreted.; [Isoform 4]: Cell membrane; Single-pass type I membrane protein.; [Isoform 5]: Cell membrane; Single-pass type I membrane protein.; [Isoform 6]: Secreted.; [Isoform 7]: Secreted.; [Isoform 8]: Secreted.
PMID: 3145195 by Norment A.M., et al. A second subunit of CD8 is expressed in human T cells.
PMID: 3145196 by Disanto J.P., et al. The human Lyt-3 molecule requires CD8 for cell surface expression.