Gene Accession

Q9UM73

Gene Alias

Protein names Recommended name ALK tyrosine kinase receptor Curated EC number EC:2.7.10.1 2 Publications (UniProtKB | ENZYME | Rhea) Alternative names Anaplastic lymphoma kinase 1 Publication CD Antigen Name CD246 Gene names Name ALK

Background

ALK L1198F lies within the protein kinase domain of the Alk protein (UniProt.org). L1198F confers a gain of function to the Alk protein as demonstrated by increased Alk kinase activity and downstream Pi3k and Mapk pathway activation (PMID: 21596819). L1198F mutation of ALK resulted in the conformational change at the inhibitor site and altered the binding affinity of ALK to crizotinib and lorlatinib. L1198F mutation also affected the autoactivation of ALK as supported by the identification of His1124 and Tyr1278 as critical amino acids involved in ATP binding and phosphorylation. The L1198F substitution confers resistance to lorlatinib through steric interference with drug binding. However, L1198F paradoxically enhances binding to crizotinib, negating the effect of C1156Y and resensitizing resistant cancers to crizotinib.