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Title: Native state volume fluctuations in proteins as a mechanism for dynamic allostery

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.6b12058· OSTI ID:1373407
 [1];  [2];  [3];  [4]; ORCiD logo [3]
  1. Univ. of Washington, Seattle, WA (United States)
  2. Univ. of North Carolina, Chapel Hill, NC (United States)
  3. Univ. of Alabama, Birmingham, AL (United States)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)

Allostery enables tight regulation of protein function in the cellular environment. While existing models of allostery are firmly rooted in the current structure-function paradigm, the mechanistic basis for allostery in the absence of structural change remains unclear. In this study, we show that a typical globular protein is able to undergo significant changes in volume under native conditions while exhibiting no additional changes in protein structure. These native state volume fluctuations were found to correlate with changes in internal motions that were previously recognized as a source of allosteric entropy. This finding offers a novel mechanistic basis for allostery in the absence of canonical structural change. As a result, the unexpected observation that function can be derived from expanded, low density protein states has broad implications for our understanding of allostery and suggests that the general concept of the native state be expanded to allow for more variable physical dimensions with looser packing.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Institutes of Health (NIH); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1373407
Journal Information:
Journal of the American Chemical Society, Vol. 139, Issue 10; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 29 works
Citation information provided by
Web of Science

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Cited By (6)

Seeking allosteric networks in PDZ domains journal October 2018
Pressure accelerates the circadian clock of cyanobacteria journal August 2019
Allosteric control of metal-responsive transcriptional regulators in bacteria journal December 2019
Addressing the role of the α-helical extension in the folding of the third PDZ domain from PSD-95 journal October 2017
Long-range correlation in protein dynamics: Confirmation by structural data and normal mode analysis journal February 2020
The Exact Nuclear Overhauser Enhancement: Recent Advances text January 2017

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