A Study of the Interaction Between Malachite Green and Lysozyme by Steady-state Fluorescence
Overview
Authors
Affiliations
The interaction of a N-methylated diaminotriphenylmethane dye, malachite green, with lysozyme was investigated by fluorescence spectroscopic techniques under physiological conditions. The binding parameters have been evaluated by fluorescence quenching methods. The results revealed that malachite green caused the fluorescence quenching of lysozyme through a static quenching procedure. The thermodynamic parameters like DeltaH and DeltaS were calculated to be -15.33 kJ mol(-1) and 19.47 J mol(-1) K(-1) according to van't Hoff equation, respectively, which proves main interaction between malachite green and lysozyme is hydrophobic forces and hydrogen bond contact. The distance r between donor (lysozyme) and acceptor (malachite green) was obtained to be 3.82 nm according to Frster's theory. The results of synchronous fluorescence, UV/vis and three-dimensional fluorescence spectra showed that binding of malachite green with lysozyme can induce conformational changes in lysozyme. In addition, the effects of common ions on the constants of lysozyme-malachite green complex were also discussed.
Zhu M, Wang L, Zhang H, Fan S, Wang Z, Li Q Environ Sci Pollut Res Int. 2018; 25(18):17735-17748.
PMID: 29671232 DOI: 10.1007/s11356-018-1955-9.
Li N, Wei D, Sun Q, Han X, Du B, Wei Q R Soc Open Sci. 2018; 5(2):171445.
PMID: 29515863 PMC: 5830752. DOI: 10.1098/rsos.171445.
Roy N, Nath S, Paul P, Singh T J Fluoresc. 2017; 27(6):2295-2311.
PMID: 28831629 DOI: 10.1007/s10895-017-2171-6.
Yang L, Broderick D, Campbell Y, Gombart A, Stevens J, Jiang Y Biochim Biophys Acta. 2016; 1864(12):1667-1677.
PMID: 27596062 PMC: 5071164. DOI: 10.1016/j.bbapap.2016.08.019.
Interaction mechanism of Trp-Arg dipeptide with calf thymus DNA.
Lin J, Gao C, Liu R J Fluoresc. 2013; 23(5):921-7.
PMID: 23604815 DOI: 10.1007/s10895-013-1217-7.