Abstract
Conformational changes and protein dynamics play an important role in the catalytic efficiency of enzymes. Amide H/D exchange mass spectrometry (H/D exchange MS) is emerging as an efficient technique to study the local and global changes in protein structure and dynamics due to ligand binding, protein activation–inactivation by modification, and protein–protein interactions. By monitoring the selective exchange of hydrogen for deuterium along a peptide backbone, this sensitive technique probes protein motions and structural elements that may be relevant to allostery and function. In this report, several applications of H/D exchange MS are presented which demonstrate the unique capability of amide hydrogen/deuterium exchange mass spectrometry for examining dynamic and structural changes associated with enzyme catalysis.
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