| Primary information |
|---|
| ID | 33124 |
| Uniprot ID | P01730 |
| Description | T-cell surface glycoprotein CD4 (T-cell surface antigen T4/Leu-3) (CD antigen CD4) |
| Organism | Homo sapiens |
| Txonomy | Homo ; Homininae ; Hominidae ; Hominoidea ; Catarrhini ; Simiiformes ; Haplorrhini ; Primates ; Euarchontoglires ; Boreoeutheria ; Eutheria ; Theria ; Mammalia ; Amniota ; Tetrapoda ; Dipnotetrapodomorpha ; Sarcopterygii ; Euteleostomi ; Teleostomi ; Gnathostomata ; Vertebrata ; Craniata ; Chordata ; Deuterostomia ; Bilateria ; Eumetazoa ; Metazoa ; Opisthokonta ; Eukaryota ; cellular organisms |
| Subcellular Location | Cell membrane |
| Developmental Stage | NA |
| Similarity | NA |
| Post Translational Modification | Palmitoylation and association with LCK contribute to the enrichment of CD4 in lipid rafts. |
| Function | Integral membrane glycoprotein that plays an essential role in the immune response and serves multiple functions in responses against both external and internal offenses. In T-cells; functions primarily as a coreceptor for MHC class II molecule-peptide complex. The antigens presented by class II peptides are derived from extracellular proteins while class I peptides are derived from cytosolic proteins. Interacts simultaneously with the T-cell receptor (TCR) and the MHC class II presented by antigen presenting cells (APCs). In turn; recruits the Src kinase LCK to the vicinity of the TCR-CD3 complex. LCK then initiates different intracellular signaling pathways by phosphorylating various substrates ultimately leading to lymphokine production; motility; adhesion and activation of T-helper cells. In other cells such as macrophages or NK cells; plays a role in differentiation/activation; cytokine expression and cell migration in a TCR/LCK-independent pathway. Participates in the development |
| Length | 458 |
| Molecular Weight | 51111 |
| Reference | 2990730; 3263213; 87 |
| Hormone | NA |
| PDB ID | NA
|