Journal
JOURNAL OF CELL SCIENCE
Volume 117, Issue 19, Pages 4343-4354Publisher
COMPANY BIOLOGISTS LTD
DOI: 10.1242/jcs.01392
Keywords
small GTPases; protein kinases; signal transduction
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p21-activated kinases (Paks) are a highly conserved family of enzymes that bind to and are activated by small GTPases of the Cdc42 and Rac families. With the notable exception of plants, nearly all eukaryotes encode one or more Pak genes, indicating an ancient origin and important function for this family of enzymes. Genetic approaches in many different experimental systems, ranging from yeast to mice, are beginning to decipher the different functions of Paks. Although some of these functions are unique to a given organism, certain common themes have emerged, such as the activation of mitogen-activated protein kinase (MAPK) cascades and the regulation of cytoskeletal structure through effects on the actin and tubulin cytoskeletons.
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