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Positive Versus Negative Signaling of LET-23: Regulation Through the Adaptor Protein, SEM-5

Worby and Margolis highlight advances in our understanding of signaling from growth factor receptors using the worm Caenorhabditis elegans as a model organism. ARK-1, a cytoplasmic tyrosine kinase, appears to be a negative regulator of multiple pathways in C. elegans. The authors discuss several models for how this negative regulation may occur. The adaptor protein (Grb2 in mammals or SEM-5 in C. elegans) may serve as a regulated scaffold for the binding of other signaling proteins that include both positive (Ras) and negative (ACK) regulators. Thus, Grb2 may function in a cellular decision point for transducing the incoming signals.

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Classifications


Resource Type: Bibliography, Diagram, Illustration, Journal article/Issue, Review, Table
Audience Level: Undergraduate upper division 15-16, Graduate, Professional (degree program)

Author and Copyright


Authors and Editors: Carolyn Worby of Department of Biological Chemistry, University of Michigan Medical School, Ben Margolis of Department of Biological Chemistry, University of Michigan Medical School
Publisher: American Association for the Advancement of Science
Format: application/pdf, image/gif, image/jpeg, text/html
Copyright and other restrictions: Yes
Cost: Yes

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Collection:
STKE/Science Signaling


     
   

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