TNK2

Description

The TNK2 (tyrosine kinase non receptor 2) is a protein-coding gene located on chromosome 3.

Activated CDC42 kinase 1, also known as ACK1, is an enzyme that in humans is encoded by the TNK2 gene.

TNK2 gene encodes a non-receptor tyrosine kinase, ACK1, that binds to multiple receptor tyrosine kinases e.g. EGFR, MERTK, AXL, HER2 and insulin receptor (IR). ACK1 also interacts with Cdc42Hs in its GTP-bound form and inhibits both the intrinsic and GTPase-activating protein (GAP)-stimulated GTPase activity of Cdc42Hs. This binding is mediated by a unique sequence of 47 amino acids C-terminal to an SH3 domain. The protein may be involved in a regulatory mechanism that sustains the GTP-bound active form of Cdc42Hs and which is directly linked to a tyrosine phosphorylation signal transduction pathway. Several alternatively spliced transcript variants have been identified from this gene, but the full-length nature of only two transcript variants has been determined.

== Interactions == ACK1 or TNK2 has been shown to interact with AKT, Androgen receptor or AR, a tumor suppressor WWOX, FYN and Grb2. ACK1 interaction with its substrates resulted in their phosphorylation at specific tyrosine residues. ACK1 has been shown to directly phosphorylate AKT at tyrosine 176, AR at Tyrosine 267 and 363, and WWOX at tyrosine 287 residues, respectively.

Non-receptor tyrosine-protein and serine/threonine-protein kinase that is implicated in cell spreading and migration, cell survival, cell growth and proliferation. Transduces extracellular signals to cytosolic and nuclear effectors. Phosphorylates AKT1, AR, MCF2, WASL and WWOX. Implicated in trafficking and clathrin-mediated endocytosis through binding to epidermal growth factor receptor (EGFR) and clathrin. Binds to both poly- and mono-ubiquitin and regulates ligand-induced degradation of EGFR, thereby contributing to the accumulation of EGFR at the limiting membrane of early endosomes. Downstream effector of CDC42 which mediates CDC42-dependent cell migration via phosphorylation of BCAR1. May be involved both in adult synaptic function and plasticity and in brain development. Activates AKT1 by phosphorylating it on 'Tyr-176'. Phosphorylates AR on 'Tyr-267' and 'Tyr-363' thereby promoting its recruitment to androgen-responsive enhancers (AREs). Phosphorylates WWOX on 'Tyr-287'. Phosphorylates MCF2, thereby enhancing its activity as a guanine nucleotide exchange factor (GEF) toward Rho family proteins. Contributes to the control of AXL receptor levels. Confers metastatic properties on cancer cells and promotes tumor growth by negatively regulating tumor suppressor such as WWOX and positively regulating pro-survival factors such as AKT1 and AR. Phosphorylates WASP (PubMed:20110370). {ECO:0000269|PubMed:10652228, ECO:0000269|PubMed:11278436, ECO:0000269|PubMed:16247015, ECO:0000269|PubMed:16257963, ECO:0000269|PubMed:16472662, ECO:0000269|PubMed:17038317, ECO:0000269|PubMed:18262180, ECO:0000269|PubMed:18435854, ECO:0000269|PubMed:19815557, ECO:0000269|PubMed:20110370, ECO:0000269|PubMed:20333297, ECO:0000269|PubMed:20383201}

TNK2 is also known as ACK, ACK-1, ACK1, p21cdc42Hs.

Associated Diseases

WES Whole Exome Sequencing