Temperature-jump solution X-ray scattering reveals distinct motions in a dynamic enzyme.

ABSTRACT: Correlated motions of proteins are critical to function, but these features are difficult to resolve using traditional structure determination techniques. Time-resolved X-ray methods hold promise for addressing this challenge, but have relied on the exploitation of exotic protein photoactivity, and are therefore not generalizable. Temperature jumps, through thermal excitation of the solvent, have been utilized to study protein dynamics using spectroscopic techniques, but their implementation in X-ray scattering experiments has been limited. Here, we perform temperature-jump small- and wide-angle X-ray scattering measurements on a dynamic enzyme, cyclophilin A, demonstrating that these experiments are able to capture functional intramolecular protein dynamics on the microsecond timescale. W

SUBMITTER: Thompson MC 

PROVIDER: S-EPMC6815256 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature