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2014 ; 549
(ä): 343-73
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Riboswitch structure and dynamics by smFRET microscopy
#MMPMID25432756
Suddala KC
; Walter NG
Methods Enzymol
2014[]; 549
(ä): 343-73
PMID25432756
show ga
Riboswitches are structured noncoding RNA elements that control the expression of
their embedding messenger RNAs by sensing the intracellular concentration of
diverse metabolites. As the name suggests, riboswitches are dynamic in nature so
that studying their inherent conformational dynamics and ligand-mediated folding
is important for understanding their mechanism of action. Single-molecule
fluorescence energy transfer (smFRET) microscopy is a powerful and versatile
technique for studying the folding pathways and intra- and intermolecular
dynamics of biological macromolecules, especially RNA. The ability of smFRET to
monitor intramolecular distances and their temporal evolution make it a
particularly insightful tool for probing the structure and dynamics of
riboswitches. Here, we detail the general steps for using prism-based total
internal reflection fluorescence microscopy for smFRET studies of the structure,
dynamics, and ligand-binding mechanisms of riboswitches.