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Type:	Artigo de Periódico
Title:	Influence of protein conformation and selected Hofmeister salts on bovine serum albumin/lutein complex formation
Authors:	Paulo Henrique Costa Paiva Yara Luiza Coelho Luís Henrique Mendes da Silva Maximiliano Soares Pinto Márcia Cristina Teixeira Rodrigues Vidigal Ana Clarissa dos Santos Pires
Abstract:	Protein conformation and the 3D water structure play important roles in the ability of bovine serum albumin (BSA) to form stable nanostructures with bioactive molecules. We studied the influence of BSA unfolding and those of two Hofmeister salts, sodium chloride (NaCl) as kosmotrope and sodium thiocyanate (NaSCN) as chaotrope, on BSA/lutein binding at pH 7.4 using fluorescence spectroscopy. The BSA/lutein complex formation was entropically driven and lutein was preferentially bound to site III of BSA. The binding constant (104 L mol−1), complex stoichiometry (1:1), and thermodynamic potential for BSA/lutein binding were independent of protein conformation and Hofmeister salts. However, the enthalpic and entropic components of BSA/lutein binding in the presence of NaSCN decreased as the temperature increased. The opposite was observed for BSA/lutein binding in the presence of NaCl and for denatured BSA/lutein binding. Therefore, the BSA conformation and 3D water structure directly affected the BSA/lutein binding
Subject:	Albumina Espectroscopia de fluorescência Termodinâmica
language:	eng
metadata.dc.publisher.country:	Brasil
Publisher:	Universidade Federal de Minas Gerais
Publisher Initials:	UFMG
metadata.dc.publisher.department:	ICA - INSTITUTO DE CIÊNCIAS AGRÁRIAS
Rights:	Acesso Aberto
metadata.dc.identifier.doi:	https://doi.org/10.1016/j.foodchem.2019.125463
URI:	http://hdl.handle.net/1843/41155
Issue Date:	Feb-2020
metadata.dc.url.externa:	https://www.sciencedirect.com/science/article/pii/S030881461931578X?via%3Dihub#!
metadata.dc.relation.ispartof:	Food Chemistry
Appears in Collections:	Artigo de Periódico

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