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Reprogramming Control of an Allosteric Signaling Switch Through Modular Recombination
John E. Dueber,1,3
Brian J. Yeh,2,3
Kayam Chak,3
Wendell A. Lim3*
Abstract:
Many eukaryotic signaling proteins are composed of simple modularbinding domains, yet they can display sophisticated behaviorssuch as allosteric gating and multi-input signal integration,properties essential for complex cellular circuits. To understandhow such behavior can emerge from combinations of simple domains,we engineered variants of the actin regulatory protein N-WASP(neuronal Wiskott-Aldrich syndrome protein) in which the "output"domain of N-WASP was recombined with heterologous autoinhibitory"input" domains. Synthetic switch proteins were created withdiverse gating behaviors in response to nonphysiological inputs.Thus, this type of modular framework can facilitate the evolutionor engineering of cellular signaling circuits.
1 Program in Biological Sciences, University of California, San Francisco, CA 941432240, USA. 2 Chemistry and Chemical Biology Graduate Program, University of California, San Francisco, CA 941432240, USA. 3 Department of Cellular and Molecular Pharmacology, University of California, San Francisco, CA 941432240, USA.
* To whom correspondence should be addressed. E-mail: wlim{at}itsa.ucsf.edu.
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