Oct 3, 2000

A chemical switch for inhibitor-sensitive alleles of any protein kinase

Nature
A BishopKevan M Shokat

Abstract

Protein kinases have proved to be largely resistant to the design of highly specific inhibitors, even with the aid of combinatorial chemistry. The lack of these reagents has complicated efforts to assign specific signalling roles to individual kinases. Here we describe a chemical genetic strategy for sensitizing protein kinases to cell-permeable molecules that do not inhibit wild-type kinases. From two inhibitor scaffolds, we have identified potent and selective inhibitors for sensitized kinases from five distinct subfamilies. Tyrosine and serine/threonine kinases are equally amenable to this approach. We have analysed a budding yeast strain carrying an inhibitor-sensitive form of the cyclin-dependent kinase Cdc28 (CDK1) in place of the wild-type protein. Specific inhibition of Cdc28 in vivo caused a pre-mitotic cell-cycle arrest that is distinct from the G1 arrest typically observed in temperature-sensitive cdc28 mutants. The mutation that confers inhibitor-sensitivity is easily identifiable from primary sequence alignments. Thus, this approach can be used to systematically generate conditional alleles of protein kinases, allowing for rapid functional characterization of members of this important gene family.

  • References24
  • Citations436

References

  • References24
  • Citations436

Mentioned in this Paper

Saccharomyces cerevisiae Proteins
Protein Kinase Inhibitors
Mitogen-Activated Protein Kinases
Transcription, Genetic
Gene Products, Protein
Tertiary Protein Structure
Homologous Sequences, Amino Acid
Indole Alkaloids
Gene Expression
Carbazoles

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