Temperature‐induced conformational transition of bovine serum albumin in neutral aqueous solution by reversed‐phase liquid chromatography. (23rd August 2013)

• Record Type: Journal Article
• Authors: Bian, Liujiao; Wu, Dan; Hu, Wei
• Is Part Of: Biomedical chromatography. Volume 28:Number 2(2014:Feb.)
• Page Start: 295
• Page End: 301
• Publication Date: 2013-08-23
• Subjects: bovine serum albumin -- conformational transition -- reversed‐phase liquid chromatography -- thermodynamic parameters; Chromatographic analysis -- Periodicals; Biology -- Periodicals; Medicine -- Periodicals; Biology -- Periodicals; Chromatography -- methods -- Periodicals; Medicine -- Periodicals; 543.089
• DOI: 10.1002/bmc.3020
• Languages: English
• ISSNs: 0269-3879

Abstract

ABSTRACT: The temperature‐induced conformational transition of bovine serum albumin (BSA) in neutral aqueous solution was studied using intrinsic fluorescence emission spectrum, reversed‐phase liquid chromatography and sodium dodecyl sulfate–polyacrylamide gel electrophoresis, and the conformation transition thermodynamic parameters were determined in the temperature range 12–50 °C. The results showed that, in the temperature range 12–20 °C, BSA only existed in a single conformation state A, while in the temperature range 22–50 °C, it existed in two different conformation states: A and B. The percentage of conformation state A decreased while that of conformation state B increased with the increase in temperatures, and when temperature approached 50 °C conformation state B accounted for approximately 25% of all conformation states of BSA. In the conformational transition of BSA from conformation state A to conformation state B, the positive enthalpy change, entropy change and free energy changes demonstrated that the conformational transition was endothermic, nonspontaneous and mainly entropy‐driven. © 2013 The Authors. Biomedical Chromatography published by John Wiley & Sons, Ltd.