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Potential charge transfer probe induced conformational changes of model plasma protein human serum albumin: Spectroscopic, molecular docking, and molecular dynamics simulation study
Author(s) -
Jana Sankar,
Dalapati Sasanka,
Ghosh Shalini,
Guchhait Nikhil
Publication year - 2012
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.22057
Subject(s) - chemistry , fluorophore , molecular dynamics , fluorescence , human serum albumin , intramolecular force , molecule , biophysics , computational chemistry , stereochemistry , chromatography , organic chemistry , physics , quantum mechanics , biology
The nature of binding of specially designed charge transfer (CT) fluorophore at the hydrophobic protein interior of human serum albumin (HSA) has been explored by massive blue‐shift (82 nm) of the polarity sensitive probe emission accompanying increase in emission intensity, fluorescence anisotropy, red edge excitation shift, and average fluorescence lifetimes. Thermal unfolding of the intramolecular CT probe bound HSA produces almost opposite spectral changes. The spectral responses of the molecule reveal that it can be used as an extrinsic fluorescent reporter for similar biological systems. Circular dichrosim spectra, molecular docking, and molecular dynamics simulation studies scrutinize this binding process and stability of the protein probe complex more closely. © 2012 Wiley Periodicals, Inc. Biopolymers 97: 766–777, 2012.