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Rewiring MAP Kinase Pathways Using Alternative Scaffold Assembly Mechanisms
Sang-Hyun Park,Ali Zarrinpar,Wendell A. Lim*
How scaffold proteins control information flow in signaling
pathways is poorly understood: Do they simply tether components,or do
they precisely orient and activate them? We found that theyeast
mitogen-activated protein (MAP) kinase scaffold Ste5 istolerant to
major stereochemical perturbations; heterologous proteininteractions
could functionally replace native kinase recruitmentinteractions, indicating that simple tethering is largely sufficientfor scaffold-mediated signaling. Moreover, by engineering a scaffoldthat tethers a unique kinase set, we could create a syntheticMAP
kinase pathway with non-natural input-output properties. Thesefindings
demonstrate that scaffolds are highly flexible organizingfactors that
can facilitate pathway evolution and engineering.
Department of Cellular and Molecular Pharmacology and Department
of Biochemistry and Biophysics, University of California, 513 Parnassus
Avenue, San Francisco, CA 94143, USA.
*
To whom correspondence should be addressed. E-mail:
wlim{at}itsa.ucsf.edu
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PERSPECTIVES
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[DOI: 10.1126/science.1081519] |Summary »|Full Text »|PDF »
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