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• W2340972912 startingPage "13945" @default.
• W2340972912 abstract "Biological function emerges in large part from the interactions of biomacromolecules in the complex and dynamic environment of the living cell. For this reason, macromolecular interactions in biological systems are now a major focus of interest throughout the biochemical and biophysical communities. The affinity and specificity of macromolecular interactions are the result of both structural and electrostatic factors. Significant advances have been made in characterizing structural features of stable protein–protein interfaces through the techniques of modern structural biology, but much less is understood about how electrostatic factors promote and stabilize specific functional macromolecular interactions over all possible choices presented to a given molecule in a crowded environment. In this Feature Article, we describe how vibrational Stark effect (VSE) spectroscopy is being applied to measure electrostatic fields at protein–protein interfaces, focusing on measurements of guanosine triphosphate (GTP)-binding proteins of the Ras superfamily binding with structurally related but functionally distinct downstream effector proteins. In VSE spectroscopy, spectral shifts of a probe oscillator’s energy are related directly to that probe’s local electrostatic environment. By performing this experiment repeatedly throughout a protein–protein interface, an experimental map of measured electrostatic fields generated at that interface is determined. These data can be used to rationalize selective binding of similarly structured proteins in both in vitro and in vivo environments. Furthermore, these data can be used to compare to computational predictions of electrostatic fields to explore the level of simulation detail that is necessary to accurately predict our experimental findings." @default.
• W2340972912 created "2016-06-24" @default.
• W2340972912 creator A5031510011 @default.
• W2340972912 creator A5050572384 @default.
• W2340972912 date "2015-10-06" @default.
• W2340972912 modified "2023-10-16" @default.
• W2340972912 title "Understanding and Manipulating Electrostatic Fields at the Protein–Protein Interface Using Vibrational Spectroscopy and Continuum Electrostatics Calculations" @default.
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• W2340972912 doi "https://doi.org/10.1021/acs.jpcb.5b06888" @default.
• W2340972912 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26375183" @default.
• W2340972912 hasPublicationYear "2015" @default.
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