Loading…

Role of Herborn (K240E) and Milano Slow (D375H) human serum albumin variants towards binding of phenylbutazone and ibuprofen

Human serum albumin (HSA) is the binding cargo in blood plasma. The binding of drugs to HSA determines the pharmacokinetics and pharmacodynamics of the drugs. There are 67 natural genetic variants of HSA were reported in literature. Studying the effect of albumin modifications on drug binding helps...

Full description

Saved in:
Bibliographic Details
Published in:International journal of biological macromolecules 2019-08, Vol.134, p.645-652
Main Authors: Nerusu, Aparna, Chinthapalli, Dinesh Kumar, Subramanyam, Rajagopal
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Human serum albumin (HSA) is the binding cargo in blood plasma. The binding of drugs to HSA determines the pharmacokinetics and pharmacodynamics of the drugs. There are 67 natural genetic variants of HSA were reported in literature. Studying the effect of albumin modifications on drug binding helps to treat the patients with proper medication. In the present study, we have aimed to understand the effect of two natural variants of HSA, such as Herborn (K240E) and Milano Slow (D375H) on the binding of phenylbutazone and ibuprofen. For this, we have generated K240E and D375H mutants and also double mutant (K240E/D375H) of HSA using site directed mutagenesis. The recombinant HSA and its variants were expressed in Pichia pastoris. The interaction of HSA and its variants to phenylbutazone and ibuprofen was studied using fluorescence spectroscopy. Our results showed that there is no significant effect of K240E and D375H mutations on phenylbutazone and ibuprofen binding. But the effect is significant when both the mutations were there in a single protein (K240E/D375H). Further, the CD spectroscopy data showed that there is no effect of phenylbutazone and ibuprofen binding on the conformation of protein, except in case of D375H, where there is a conformational change in the binding pocket with the ibuprofen binding. •The HSA variants Herborn (K240E), Milano Slow (D375H) and the double mutant (K240E/D375H) were expressed using P. pastoris.•Variants are having reduced α-helical content.•There is no significant effect of K240E and D375H mutations on phenylbutazone and ibuprofen binding.•Double mutant (K240E/D375H) showed reduced binding to phenylbutazone and ibuprofen.•There is no effect of phenylbutazone and ibuprofen binding on the conformation of the proteins.
ISSN:0141-8130
1879-0003
DOI:10.1016/j.ijbiomac.2019.05.075