Abstract：
:Src family kinases (SFKs) are the earliest known family of tyrosine kinases and are widely thought to play essential roles in cellular signal transduction. Although numerous functional analyses have been performed, no study has analyzed the specificity of all SFKs on an equal platform. To gain a better understanding of SFK phosphorylation, we designed a high-throughput in vitro kinase assay on the subproteome scale using surface plasmon resonance. We reacted each of the 11 human SFKs with 519 substrate proteins, and significant phosphorylation was detected in 33.6% (1921) of the total 5709 kinase-substrate combinations. A large number of novel phosphorylations were included among them. Many substrates were shown to be phosphorylated by multiple SFKs, which might reflect functional complementarity of SFKs. Clustering analysis of phosphorylation results grouped substrates into 10 categories, while the similarity of SFK catalytic specificity exhibited no significant correlation with that of amino acid sequences. In silico predictions of SRC-specific phosphorylation sites were not consistent with experimental results, implying some unknown SRC recognition modes. In an attempt to find biologically meaningful novel substrates, phosphorylation data were integrated with annotation data. The extensive in vitro data obtained in this study would provide valuable clues for further understanding SFK-mediated signal transduction.
journal_name
J Proteome Resjournal_title
Journal of proteome researchauthors
Takeda H,Kawamura Y,Miura A,Mori M,Wakamatsu A,Yamamoto J,Isogai T,Matsumoto M,Nakayama KI,Natsume T,Nomura N,Goshima Ndoi
10.1021/pr100773tsubject
Has Abstractpub_date
2010-11-05 00:00:00pages
5982-93issue
11eissn
1535-3893issn
1535-3907journal_volume
9pub_type
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