Estimation of interaction between oriented immobilized green fluorescent protein and its antibody by high performance affinity chromatography and molecular docking

Journal of Molecular Recognition : JMR
Qian LiXiaohui Zheng

Abstract

Although green fluorescence protein (GFP) and its antibody are widely used to track a protein or a cell in life sciences, the binding behavior between them remains unclear. In this work, diazo coupling method that synthesized a new stationary GFP was oriented immobilized on the surface of macro-porous silica gel by a phase. The stationary phase was utilized to confirm the validation of injection amount-dependent analysis in exploring protein-protein interaction that use GFP antibody as a probe. GFP antibody was proved to have one type of binding site on immobilized GFP. The number of binding site and association constant were calculated to be (6.41 ± 0.76) × 10(-10) M and (1.39 ± 0.12) × 10(9) M(-1). Further analysis by molecular docking showed that the binding of GFP to its antibody is mainly driven by hydrogen bonds and salt bridges. These results indicated that injection amount-dependent analysis is capable of exploring the protein-protein interactions with the advantages of ligand and time saving. It is a valuable methodology for the ligands, which are expensive or difficult to obtain.

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Citations

Nov 19, 2019·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·Qi LuXin-Ya Liu

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