Issue 22, 2022

Unravelling the molecular interaction of diselenodipropionic acid (DSePA) with human serum albumin (HSA)

Abstract

Diselenodipropionic acid (DSePA), a selenocystine derivative, has emerged as a promising pharmacologically active organoselenium compound. In order to fully utilize its activity, there is a need to understand its transport mechanism as well as interaction with circulatory proteins like human serum albumin (HSA). Accordingly, interaction between DSePA and HSA has been investigated in this study by employing integrated spectroscopic and docking methods. Both absorption and fluorescence spectra of HSA showed significant changes on addition of DSePA. From these changes the binding constant (Kb) has been estimated to be (2.5 ± 0.1) × 105 M−1 and (3.2 ± 0.3) × 105 M−1, respectively by employing Benessi-Hildebrand and modified Stern-Volmer equations. The molecular interaction was also corroborated by isothermal titration calorimetry (ITC) with mono-model fitting, from which binding constant (Kb) value was also estimated. The HSA-DSePA complex was analyzed by small angle X-ray scattering and circular dichroism techniques. Molecular docking studies suggested that DSePA binds at domain IIA with specific molecular interactions at Trp214, Lys199, Arg222, Ala291, Leu238, Arg257 amino acid residues. These results provide evidence for the interaction between DSePA and HSA and similar tools can be extrapolated to understand interaction with many other proteins during its metabolic process.

Graphical abstract: Unravelling the molecular interaction of diselenodipropionic acid (DSePA) with human serum albumin (HSA)

Supplementary files

Article information

Article type
Paper
Submitted
28 мар 2022
Accepted
09 май 2022
First published
10 май 2022

New J. Chem., 2022,46, 10560-10567

Unravelling the molecular interaction of diselenodipropionic acid (DSePA) with human serum albumin (HSA)

S. A. M. Shaikh, S. L. Gawali, V. K. Jain and K. I. Priyadarsini, New J. Chem., 2022, 46, 10560 DOI: 10.1039/D2NJ01443B

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements