| Post Translational Modifications | Phosphorylated on serine, threonine and tyrosine residues following TCR stimulation. Phosphorylated by LCK on Tyr-453 and Tyr-487 upon TCR engagement. |
| Function | Lymphoid-specific receptor expressed by all T-cells and in a subset of B-cells known as B1a cells. Plays a role in the regulation of TCR and BCR signaling, thymocyte selection, T-cell effector differentiation and immune tolerance. Acts by interacting with several ligands expressed on B-cells such as CD5L or CD72 and thereby plays an important role in contact-mediated, T-dependent B-cell activation and in the maintenance of regulatory T and B-cell homeostasis. Functions as a negative regulator of TCR signaling during thymocyte development by associating with several signaling proteins including LCK, CD3Z chain, PI3K or CBL. Mechanistically, co-engagement of CD3 with CD5 enhances phosphorylated CBL recruitment leading to increased VAV1 phosphorylation and degradation. Modulates B-cell biology through ERK1/2 activation in a Ca(2+)-dependent pathway via the non-selective Ca(2+) channel TRPC1, leading to IL-10 production. |
| Protein Name | T-Cell Surface Glycoprotein Cd5Lymphocyte Antigen T1/Leu-1Cd Antigen Cd5 |
| Cellular Localisation | Cell MembraneSingle-Pass Type I Membrane Protein |
| Alternative Protein Names | T-Cell Surface Glycoprotein Cd5 proteinLymphocyte Antigen T1/Leu-1 proteinCd Antigen Cd5 proteinCD5 proteinLEU1 protein |
Information sourced from Uniprot.org
