ALK

Highest pathogenic variant AF is 0.0000024781243

Gene type

protein_coding

Transcript type

protein_coding

Transcript

ENST00000389048

Coding exons

29

Length

728793

Individuals with no LoFs

125341

Homozygous LoFs

0

Heterozygous LoFs

407

Defined

125748

p

0.00162

Function

FUNCTION: Neuronal receptor tyrosine kinase that is essentially and transiently expressed in specific regions of the central and peripheral nervous systems and plays an important role in the genesis and differentiation of the nervous system. Transduces signals from ligands at the cell surface, through specific activation of the mitogen-activated protein kinase (MAPK) pathway. Phosphorylates almost exclusively at the first tyrosine of the Y- x-x-x-Y-Y motif. Following activation by ligand, ALK induces tyrosine phosphorylation of CBL, FRS2, IRS1 and SHC1, as well as of the MAP kinases MAPK1/ERK2 and MAPK3/ERK1. Acts as a receptor for ligands pleiotrophin (PTN), a secreted growth factor, and midkine (MDK), a PTN-related factor, thus participating in PTN and MDK signal transduction. PTN-binding induces MAPK pathway activation, which is important for the anti-apoptotic signaling of PTN and regulation of cell proliferation. MDK-binding induces phosphorylation of the ALK target insulin receptor substrate (IRS1), activates mitogen-activated protein kinases (MAPKs) and PI3-kinase, resulting also in cell proliferation induction. Drives NF-kappa-B activation, probably through IRS1 and the activation of the AKT serine/threonine kinase. Recruitment of IRS1 to activated ALK and the activation of NF-kappa-B are essential for the autocrine growth and survival signaling of MDK. {ECO:0000269|PubMed:11121404, ECO:0000269|PubMed:11278720, ECO:0000269|PubMed:11387242, ECO:0000269|PubMed:11809760, ECO:0000269|PubMed:12107166, ECO:0000269|PubMed:12122009, ECO:0000269|PubMed:15226403, ECO:0000269|PubMed:15908427, ECO:0000269|PubMed:16317043, ECO:0000269|PubMed:16878150, ECO:0000269|PubMed:17274988}.;

Disease

DISEASE: Note=A chromosomal aberration involving ALK is found in a form of non-Hodgkin lymphoma. Translocation t(2;5)(p23;q35) with NPM1. The resulting chimeric NPM1-ALK protein homodimerize and the kinase becomes constitutively activated. The constitutively active fusion proteins are responsible for 5-10% of non-Hodgkin lymphomas.; DISEASE: Note=A chromosomal aberration involving ALK is associated with inflammatory myofibroblastic tumors (IMTs). Translocation t(2;11)(p23;p15) with CARS; translocation t(2;4)(p23;q21) with SEC31A.; DISEASE: Note=A chromosomal aberration involving ALK is associated with anaplastic large-cell lymphoma (ALCL). Translocation t(2;17)(p23;q25) with ALO17.; DISEASE: Neuroblastoma 3 (NBLST3) [MIM:613014]: A common neoplasm of early childhood arising from embryonic cells that form the primitive neural crest and give rise to the adrenal medulla and the sympathetic nervous system. {ECO:0000269|PubMed:18724359, ECO:0000269|PubMed:18923523, ECO:0000269|PubMed:18923525, ECO:0000269|PubMed:21242967}. Note=Disease susceptibility is associated with variations affecting the gene represented in this entry.; DISEASE: Note=The ALK signaling pathway plays an important role in glioblastoma, the most common malignant brain tumor of adults and one of the most lethal cancers. It regulates both glioblastoma migration and growth.; DISEASE: Note=A chromosomal aberration involving ALK is found in one subject with colorectal cancer. Translocation t(2;2)(p23.1;p23.3). A 5 million base pair tandem duplication generates an in-frame WDCP-ALK gene fusion. {ECO:0000269|PubMed:22327622}.;