LCK — LCK proto-oncogene, Src family tyrosine kinase
LCK belongs to a gene co-expression module in 5 of 28 SCUBA cell types. Each module groups genes that rise and fall together in that cell type; the genes it shares a module with are its closest co-expression partners there.
LCK's module in each cell type
| Cell type | Module | Shares the module with | |
|---|---|---|---|
| CD4⁺ T cells | Cytoskeleton & metabolism Cytoskeletal | ATP5F1D, ATP5MC3, ATP6V0E1, BRK1, CAP1, MYL6, NEDD8, PPP1R18 +11 more | View in SCUBA |
| CD8⁺ T cells | TCR Complex Signaling TCR Signaling | ACAP1, ANXA1, CD37, CD3E, CITED2, DUSP1, EVL, LAPTM5 +4 more | View in SCUBA |
| Gamma-delta T cells | Glycolysis & Proteasome Housekeeping | ACAA2, ANAPC15, APEH, C1QBP, CCDC167, CHMP2A, CLNS1A, ENO1 +11 more | |
| Innate lymphoid cells | ILC1 Actin Motility Cytoskeleton & motility | ACAP1, ARHGDIB, CORO1A, DGCR6L, EVL, GPSM3, HEXA, MFGE8 +14 more | View in SCUBA |
| Mucosal-associated invariant T cell | T cell Homeostasis Housekeeping | ATP5PB, COPZ1, FERMT3, GPS1, HMGN4, ICAM2, LAMTOR2, LSM6 +14 more |
About the gene
| Chromosome | 1: 32251244-32286165 |
|---|---|
| Predicted location | Intracellular |
| Essential gene | No |
| Protein class | Cancer-related genes, Disease related genes, Enzymes, FDA approved drug targets, Human disease related genes, Predicted intracellular proteins |
| Molecular function | Kinase, Transferase, Tyrosine-protein kinase |
| Biological process | Host-virus interaction |
Function
Non-receptor tyrosine-protein kinase that plays an essential role in the selection and maturation of developing T-cells in the thymus and in the function of mature T-cells. Plays a key role in T- cell antigen receptor (TCR)-linked signal transduction pathways. Constitutively associated with the cytoplasmic portions of the CD4 and CD8 surface receptors. Association of the TCR with a peptide antigen- bound MHC complex facilitates the interaction of CD4 and CD8 with MHC class II and class I molecules, respectively, thereby recruiting the associated LCK protein to the vicinity of the TCR/CD3 complex. LCK then phosphorylates tyrosine residues within the immunoreceptor tyrosine- based activation motifs (ITAM) of the cytoplasmic tails of the TCR- gamma chains and CD3 subunits, initiating the TCR/CD3 signaling pathway. Once stimulated, the TCR recruits the tyrosine kinase ZAP70, that becomes phosphorylated and activated by LCK. Following this, a large number of signaling molecules are recruited, ultimately leading to lymphokine production. LCK also contributes to signaling by other receptor molecules. Associates directly with the cytoplasmic tail of CD2, which leads to hyperphosphorylation and activation of LCK. Also plays a role in the IL2 receptor-linked signaling pathway that controls the T-cell proliferative response. Binding of IL2 to its receptor results in increased activity of LCK. Is expressed at all stages of thymocyte development and is required for the regulation of maturation events that are governed by both pre-TCR and mature alpha beta TCR. Phosphorylates other substrates including RUNX3, PTK2B/PYK2, the microtubule-associated protein MAPT, RHOH or TYROBP. Interacts with FYB2.
Human Protein Atlas · Open Targets · UniProt
Gene annotation from the Human Protein Atlas and UniProt; see sources & licences.