title: The cysteine-cluster motif of c-Yes, Lyn and FAK as a suppressive module for the kinases.
abstract: The Src family of non-receptor protein tyrosine kinases plays a critical role in the progression of human cancers so that the development of its specific inhibitors is important as a therapeutic tool. We previously reported that cysteine residues in the cysteine-cluster (CC) motif of v-Src were critical for the kinase inactivation by the SH-alkylating agents such as N-(9-acridinyl) maleimide (NAM), whereas other cysteine residues were dispensable. We found similar CC-motifs in other Src-family kinases and a non-Src-family kinase, FAK. In this study, we explored the function of the CC-motif in Yes, Lyn and FAK. While Src has four cysteines in the CC-motif, c-Yes and Lyn have three and two of the four cysteines, respectively. Two conserved cysteines of the Src family kinases, corresponding to Cys487 and Cys498 of Src, were essential for the resistance to the inactivation of the kinase activity by NAM, whereas the first cysteine of c-Yes, which is absent in Lyn, was less important. FAK has similar CC-motifs with two cysteines and both cysteines were again essential for the resistance to the inactivation of the kinase activity by NAM. Taken together, modification of cysteine residues of the CC-motif causes a repressor effect on the catalytic activity of the Src family kinases and FAK.
authors: Division of Cancer Biology, Nagoya University School of Medicine, Nagoya 466-8550, Japan.
authors: Mohammad Aminur
authors: MA
authors: Rahman
authors: Takeshi
authors: T
authors: Senga
authors: Myat Lin
authors: ML
authors: Oo
authors: Hitoki
authors: H
authors: Hasegawa
authors: Md Helal Uddin
authors: MH
authors: Biswas
authors: Naing Naing
authors: NN
authors: Mon
authors: Pengyu
authors: P
authors: Huang
authors: Satoko
authors: S
authors: Ito
authors: Tadashi
authors: T
authors: Yamamoto
authors: Michinari
authors: M
authors: Hamaguchi
mesh_terms: D020816:Amino Acid Motifs; D000595:Amino Acid Sequence; D000818:Animals; D019556:COS Cells; D002522:Chlorocebus aethiops; D017124:Conserved Sequence; D051416:Focal Adhesion Protein-Tyrosine Kinases / Q000737:chemistry* / Q000378:metabolism; D008301:Maleimides / Q000494:pharmacology; D008969:Molecular Sequence Data; D051575:Proto-Oncogene Proteins c-yes / Q000737:chemistry* / Q000378:metabolism; D013329:Structure-Activity Relationship; D019061:src-Family Kinases / Q000737:chemistry* / Q000378:metabolism
chemical_list: D008301:Maleimides; C080490:N-(9-acridinyl)maleimide; D051416:Focal Adhesion Protein-Tyrosine Kinases; D051575:Proto-Oncogene Proteins c-yes; C060902:lyn protein-tyrosine kinase; D019061:src-Family Kinases