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Hale CS, Ornelas DN, Yang JS, Chang L, Vang K, Batarseh RN, Ozaki N, Rodgers VGJ. Interrogating the Osmotic Pressure of Self-Crowded Bovine Serum Albumin Solutions: Implications of Specific Monovalent Anion Effects Relative to the Hofmeister Series. J Phys Chem B 2018; 122:8037-8046. [PMID: 30074781 DOI: 10.1021/acs.jpcb.8b07000] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The free-solvent-based (FSB) model and osmotic pressure were used to probe the ion binding and protein hydration for self-crowded bovine serum albumin in 0.15 M NaF, NaCl, NaI, and NaSCN solutions. All experiments were conducted with solutions at pH 7.4. The regressed results of the FSB model behavior to the measured osmotic pressure were excellent, albeit, the osmotic pressure data for NaSCN were noisy. The resulting ion binding and hydration were realistic values and the covariance of the two parameters was exceptionally low, providing substantial credibility to the FSB model. The results showed that the kosmotropic F- and neutral Cl- solutions generated significantly higher ion binding and protein hydration than the chaotropic solutions of I- and SCN-. Further, the ionic strength ratio and resulting hydration implied that the chaotropic solutions had substantially higher aggregation than the other salts investigated. Overall, the FSB model provides an additional, complementary tool to contribute to the analysis of crowded protein solutions relative to anions in the Hofmeister series as it can interrogate crowded solutions directly; something that is not possible with many measurement techniques.
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Affiliation(s)
- Christopher S Hale
- Department of Bioengineering, B2K Group (Biotransport and Bioreaction Kinetics Group) , University of California , Riverside , California 92521 , United States
| | - Danielle N Ornelas
- Department of Bioengineering, B2K Group (Biotransport and Bioreaction Kinetics Group) , University of California , Riverside , California 92521 , United States
| | - Jennifer S Yang
- Department of Bioengineering, B2K Group (Biotransport and Bioreaction Kinetics Group) , University of California , Riverside , California 92521 , United States
| | - Larry Chang
- Department of Bioengineering, B2K Group (Biotransport and Bioreaction Kinetics Group) , University of California , Riverside , California 92521 , United States
| | - Kevin Vang
- Department of Bioengineering, B2K Group (Biotransport and Bioreaction Kinetics Group) , University of California , Riverside , California 92521 , United States
| | - Ramsey N Batarseh
- Department of Bioengineering, B2K Group (Biotransport and Bioreaction Kinetics Group) , University of California , Riverside , California 92521 , United States
| | - Noriko Ozaki
- Department of Bioengineering, B2K Group (Biotransport and Bioreaction Kinetics Group) , University of California , Riverside , California 92521 , United States
| | - Victor G J Rodgers
- Department of Bioengineering, B2K Group (Biotransport and Bioreaction Kinetics Group) , University of California , Riverside , California 92521 , United States
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Effect of aluminum speciation on ultrafiltration membrane fouling by low dose aluminum coagulation with bovine serum albumin (BSA). J Memb Sci 2015. [DOI: 10.1016/j.memsci.2015.05.043] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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McBride DW, Rodgers VGJ. A generalized free-solvent model for the osmotic pressure of multi-component solutions containing protein-protein interactions. Math Biosci 2014; 253:72-87. [PMID: 24769082 DOI: 10.1016/j.mbs.2014.04.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 04/04/2014] [Indexed: 10/25/2022]
Abstract
The free-solvent model has been shown to have excellent predictability of the osmotic pressure for single and binary non-interactive proteins in aqueous solutions. Here the free-solvent model is extended to be more generalized by including the contributions of intra- and inter-protein interactions to the osmotic pressure of a solution in the form of homo- and hetero-multimers. The solute-solvent interactions are considered to be unique for each homo- and hetero-multimer in solution. The effect of the various generalized free-solvent model parameters on the osmotic pressure are examined for a single protein solution with a homo-dimer, a binary protein solution with no protein-protein interactions, and a binary protein solution with a hetero-dimer. Finally, the limitations associated with the generalized free-solvent model are discussed.
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Affiliation(s)
- Devin W McBride
- B2K Group (Biotransport & Bioreaction Kinetics Group), Center for Bioengineering Research, Department of Bioengineering, University of California, Riverside, Riverside, CA 92521, United States
| | - V G J Rodgers
- B2K Group (Biotransport & Bioreaction Kinetics Group), Center for Bioengineering Research, Department of Bioengineering, University of California, Riverside, Riverside, CA 92521, United States.
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