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Mol. Cell. Biol., Nov 1996, 6486-6493, Vol 16, No. 11
Z Songyang, KP Lu, YT Kwon, LH Tsai, O Filhol, C Cochet, DA Brickey, TR Soderling, C Bartleson, DJ Graves, AJ DeMaggio, MF Hoekstra, J Blenis, T Hunter and LC Cantley
We have developed a method to study the primary sequence specificities of
protein kinases by using an oriented degenerate peptide library. We report
here the substrate specificities of eight protein Ser/Thr kinases. All of
the kinases studied selected distinct optimal substrates. The identified
substrate specificities of these kinases, together with known crystal
structures of protein kinase A, CDK2, Erk2, twitchin, and casein kinase I,
provide a structural basis for the substrate recognition of protein Ser/Thr
kinases. In particular, the specific selection of amino acids at the +1 and
-3 positions to the substrate serine/threonine can be rationalized on the
basis of sequences of protein kinases. The identification of optimal
peptide substrates of CDK5, casein kinases I and II, NIMA,
calmodulin-dependent kinases, Erk1, and phosphorylase kinase makes it
possible to predict the potential in vivo targets of these kinases.
Copyright © 1996, American Society for Microbiology
A structural basis for substrate specificities of protein Ser/Thr kinases: primary sequence preference of casein kinases I and II, NIMA, phosphorylase kinase, calmodulin-dependent kinase II, CDK5, and Erk1
Division of Signal Transduction, Beth Israel Hospital, Boston, Massachusetts 02215, USA.
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