LYK5: Lysates

The protein encoded by the LYK5 gene contains a STE20-like kinase domain, but lacks several residues that are critical forcatalytic activity, so it is termed a 'pseudokinase'. The protein forms a heterotrimeric complex withserine/threonine kinase 11 (STK11, also known as LKB1) and the scaffolding protein calcium binding protein 39 (CAB39,also known as MO25). The protein activates STK11 leading to the phosphorylation of both proteins and excluding STK11from the nucleus. The protein is necessary for STK11-induced G1 cell cycle arrest. A mutation in this gene has beenshown to result in polyhydramnios, megalencephaly, and symptomatic epilepsy (PMSE) syndrome. Multiple transcriptvariants encoding different isoforms have been found for this gene. Additional transcript variants have been describedbut their full-length nature is not known. (provided by RefSeq)