Abstract
Protein tyrosine kinases (PTKs) have central roles in cellular signal transduction. We have identified a sequence motif (CGT[C]GA) in phosphorothioate-modified oligodeoxynucleotides (ODNs) that specifically inhibits the enzymatic activity of recombinant or immunoprecipitated PTK in vitro. Hexamer ODNs containing this motif block both substrate and autophosphorylation of at least four different PTKs but have no apparent effect on the enzymatic activity of a serine/threonine protein kinase. These data suggest possible new applications for ODNs and have implications for the design and interpretation of experiments using antisense or triplex ODNs.
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