作者: Ashley C W Pike , Peter Rellos , Frank H Niesen , Andrew Turnbull , Antony W Oliver
DOI: 10.1038/EMBOJ.2008.8
关键词: Protomer 、 Protein kinase A 、 Active site 、 Autophosphorylation 、 Biophysics 、 Biochemistry 、 Protein structure 、 Biology 、 Phosphorylation 、 Kinase 、 Signal transduction
摘要: Protein kinase autophosphorylation of activation segment residues is a common regulatory mechanism in phosphorylation-dependent signalling cascades. However, the molecular mechanisms that guarantee specific and efficient phosphorylation these sites have not been elucidated. Here, we report on three novel diverse protein structures reveal an exchanged conformation. This dimeric arrangement results active conformation trans, with close proximity to site interacting protomer. Analytical ultracentrifugation chemical cross-linking confirmed presence dimers solution. Consensus substrate sequences for each showed identified are non-consensus sites. Based presented structural functional data, model at proposed likely be other kinases from subfamilies.