Modulation of Toroidal Proteins Dynamics in Favor of Functional Mechanisms upon Ligand Binding.

ABSTRACT: Toroidal proteins serve as molecular machines and play crucial roles in biological processes such as DNA replication and RNA transcription. Despite progress in the structural characterization of several toroidal proteins, we still lack a mechanistic understanding of the significance of their architecture, oligomerization states, and intermolecular interactions in defining their biological function. In this work, we analyze the collective dynamics of toroidal proteins with different oligomerization states, namely, dimeric and trimeric DNA sliding clamps, nucleocapsid proteins (4-, 5-, and 6-mers) and Trp RNA-binding attenuation proteins (11- and 12-mers). We observe common global modes, among which cooperative rolling stands out as a mechanism enabling DNA processivity, and clamshell motion

SUBMITTER: Li H 

PROVIDER: S-EPMC7136436 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature