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Macromolecular Crowding and Protein Stability
Abstract
An understanding of cellular chemistry requires knowledge of how crowded environments affect proteins. The influence of crowding on protein stability arises from two phenomena, hard-core repulsions and soft (i.e., chemical) interactions. Most efforts to understand crowding effects on protein stability, however, focus on hard-core repulsions, which are inherently entropic and stabilizing. We assessed these phenomena by measuring the temperature dependence of NMR-detected amide proton exchange and used these data to extract the entropic and enthalpic contributions of crowding to the stability of ubiquitin. Contrary to expectations, the contribution of chemical interactions is large and in many cases dominates the contribution from hardcore repulsions. Our results show that both chemical interactions and hard-core repulsions must be considered when assessing the effects of crowding and help explain previous observations about protein stability and dynamics in cells.
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Metadata
- Authors
- Wang, Y., Sarkar, M., Smith, A. E., Krois, A. S., & Pielak, G. J.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2012-09-27
- Volume
- 134
- Issue
- 40
- Pages
- 16614-16618
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2323551623
- Cited by
- 346
- References
- 51
- FWCI
- 11.15
- Type
- journal article
- Language
- en
- Open access
- closed
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