Protocol for determining protein dynamics using FT-IR spectroscopy

In biological systems, protein function depends on spatial and temporal changes known as protein dynamics, which can be probed by amide hydrogen/deuterium (H/D) exchange. Here, we present a protocol for determining protein dynamics by Fourier-transform infrared (FT-IR) spectroscopy. We describe steps for pro-tein sample preparation and FT-IR spectra collection. We then detail procedures for spectra analysis. Applications include the effects of protein mutation or pro-tein and metal ion or ligand interactions on the protein H/D exchange rate. For complete details on the use and execution of this protocol, please refer to Yu et al. (2013).1