Binding Ensemble Profiling with Photoaffinity Labeling (BEProFL) Approach: Mapping the Binding Poses of HDAC8 Inhibitors
作者:Bai He、Subash Velaparthi、Gilles Pieffet、Chris Pennington、Aruna Mahesh、Denise L. Holzle、Michael Brunsteiner、Richard van Breemen、Sylvie Y. Blond、Pavel A. Petukhov
DOI:10.1021/jm9005077
日期:2009.11.26
A binding ensemble profiling with (f)photoaffinity labeling (BEProFL) approach that utilizes photo-labeling of HDAC8 with a probe containing a UV-activated aromatic azide, mapping of the covalent modifications by liquid chromatography-tandem mass spectrometry, and a computational method to characterize the multiple binding poses of the probe is described. By use of the BEProFL approach, two distinct binding poses of the HDAC8 probe were identified. The data also suggest that an "upside-down" pose with the Surface binding group of the probe bound in an alternative pocket near the catalytic site may contribute to the binding.
Design of dantrolene-derived probes for radioisotope-free photoaffinity labeling of proteins involved in the physiological Ca2+ release from sarcoplasmic reticulum of skeletal muscle
Bifunctional dantrolene derivatives have been synthesized as probes for radioisotope-free photoaffinitylabeling with the aim of elucidating the molecular mechanism of skeletal muscle contraction. GIF-0430 and GIF-0665 are aromatic azido-functionalized derivatives that were designed to selectively inhibit physiological Ca2+ release (PCR) from sarcoplasmic reticulum (SR) in mouse skeletal muscle without