Specific protein-labeling and ligand-binding position analysis with amidopyrene probes as LDI MS tags†,10.1039/C8OB02222D

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Lactoyl-CoA 全氟丁基戊烷白叶藤碱全氟己基辛烷新白叶藤碱壳寡糖特色专题-生物多肽

Specific protein-labeling and ligand-binding position analysis with amidopyrene probes as LDI MS tags†

Rei Watanabe,Yaping Hu,Keita Iio,Kozo Yoneda,Atsunori Hattori,Atsushi Arai,Hideo Kigoshi

Organic & Biomolecular Chemistry Pub Date : 10/04/2018 00:00:00 , DOI:10.1039/C8OB02222D

Abstract

To readily analyze the binding mode of protein–ligand interactions, we developed ligand-bound-type and ligand-dissociation-type probes having 6-amidopyrene (apy) as a detecting group. Matrix- and label-assisted laser desorption/ionization mass spectrometry (MALDI and LA-LDI MS) analyses and a covalent docking simulation using these probes precisely determined the binding position of the ligand biotin on the target protein avidin (RMSD = 0.786 and 0.332 Å). Our apy-probe-labeling method may be useful for determining the unknown ligand-binding sites of various target proteins.