Single-Molecule Real-Time 3D Imaging of the Transcription Cycle by Modulation Interferometry.

ABSTRACT: Many essential cellular processes, such as gene control, employ elaborate mechanisms involving the coordination of large, multi-component molecular assemblies. Few structural biology tools presently have the combined spatial-temporal resolution and molecular specificity required to capture the movement, conformational changes, and subunit association-dissociation kinetics, three fundamental elements of how such intricate molecular machines work. Here, we report a 3D single-molecule super-resolution imaging study using modulation interferometry and phase-sensitive detection that achieves <2 nm axial localization precision, well below the few-nanometer-sized individual protein components. To illustrate the capability of this technique in probing the dynamics of complex macromolecular machine

SUBMITTER: Wang G 

PROVIDER: S-EPMC5444671 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature