Design of Bioelectronic Interfaces by Exploiting Hinge-Bending Motions in Proteins

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Science  31 Aug 2001:
Vol. 293, Issue 5535, pp. 1641-1644
DOI: 10.1126/science.1062461

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We report a flexible strategy for transducing ligand-binding events into electrochemical responses for a wide variety of proteins. The method exploits ligand-mediated hinge-bending motions, intrinsic to the bacterial periplasmic binding protein superfamily, to establish allosterically controlled interactions between electrode surfaces and redox-active, Ru(II)-labeled proteins. This approach allows the development of protein-based bioelectronic interfaces that respond to a diverse set of analytes. Families of these interfaces can be generated either by exploiting natural binding diversity within the superfamily or by reengineering the specificity of individual proteins. These proteins may have numerous medical, environmental, and defense applications.

  • * Present address: Wayne State University, Department of Chemistry, Detroit, MI 48202, USA.

  • To whom correspondence should be addressed. E-mail: hwh{at}

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