PMID: 21439473

Authors:

Butler EB, Xiong Y, Wang J, Strobel SA

Title:

Structural basis of cooperative ligand binding by the glycine riboswitch.

Journal:

Chem Biol. 2011 Mar 25;18(3):293-8.

Abstract:

The glycine riboswitch regulates gene expression through the cooperative recognition of its amino acid ligand by a tandem pair of aptamers. A 3.6 A crystal structure of the tandem riboswitch from the glycine permease operon of Fusobacterium nucleatum reveals the glycine binding sites and an extensive network of interactions, largely mediated by asymmetric A-minor contacts, that serve to communicate ligand binding status between the aptamers. These interactions provide a structural basis for how the glycine riboswitch cooperatively regulates gene expression.