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Cell Growth & Differentiation, Vol 7, Issue 11 1435-1441, Copyright © 1996 by American Association of Cancer Research

ARTICLES

Signaling by ectopically expressed Drosophila Src64 requires the protein-tyrosine phosphatase corkscrew and the adapter downstream of receptor kinases

JA Cooper, MA Simon and SJ Kussick
Fred Hutchinson Cancer Research Center, Seattle, Washington 98104, USA. jcoope@fhcrc.org

Vertebrate Src can be activated by specific mutations to become oncogenic. Analogous mutations in Drosophila Src64 (DSrc) induce abnormal differentiation of photoreceptor cells when expressed ectopically in the developing Drosophila adult eye. We have investigated the roles that the adapter protein, Downstream of receptor kinases (Drk), and the SH2 domain-containing tyrosine phosphatase, Corkscrew (Csw), play in this process. We find that dominant-negative mutations in either the drk or csw genes ameliorate the developmental abnormalities induced by activated DSrc. This suggests that Drk and Csw are required downstream of, or parallel to, DSrc. Csw does not act solely as an upstream activator of DSrc. The results are discussed in relation to potential roles for the vertebrate homologues of Drk and Csw (Grb2 and SHP2, respectively) in the transformation of fibroblasts by vertebrate Src.


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HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Cancer Research Clinical Cancer Research
Cancer Epidemiology Biomarkers & Prevention Molecular Cancer Therapeutics
Molecular Cancer Research Cell Growth & Differentiation
Copyright © 1996 by the American Association of Cancer Research.