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A Simple Method for Improving Protein Solubility and Long-Term Stability
Abstract
Increasing a protein concentration in solution to the required level, without causing aggregation and precipitation is often a challenging but important task, especially in the field of structural biology; as little as 20% of nonmembrane proteins have been found to be suitable candidates for structural studies predominantly due to poor protein solubility. We demonstrate here that simultaneous addition of charged amino acids L-Arg and L-Glu at 50 mM to the buffer can dramatically increase the maximum achievable concentration of soluble protein (up to 8.7 times). These amino acids are effective in preventing protein aggregation and precipitation, and they dramatically increase the long-term stability of the sample; additionally, they protect protein samples from proteolytic degradation. Specific protein-protein and protein-RNA interactions are not adversely affected by the presence of these amino acids. These additives are particularly suitable for situations where high protein concentration and long-term stability are required, including solution-state studies of isotopically labeled proteins by NMR.
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Metadata
- Authors
- Golovanov, A. P., Hautbergue, G. M., Wilson, S. A., & Lian, L.-Y.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2004-07-01
- Volume
- 126
- Issue
- 29
- Pages
- 8933-8939
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2151548440
- Cited by
- 466
- References
- 0
- FWCI
- 4.70
- Type
- journal article
- Language
- en
- Open access
- closed
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- Golovanov, A. P., Hautbergue, G. M., Wilson, S. A., & Lian, L.-Y. (2004). A Simple Method for Improving Protein Solubility and Long-Term Stability. Journal of the American Chemical Society. https://doi.org/10.1021/ja049297h
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