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2014 ; 83
(ä): 441-66
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Hierarchy of RNA functional dynamics
#MMPMID24606137
Mustoe AM
; Brooks CL
; Al-Hashimi HM
Annu Rev Biochem
2014[]; 83
(ä): 441-66
PMID24606137
show ga
RNA dynamics play a fundamental role in many cellular functions. However, there
is no general framework to describe these complex processes, which typically
consist of many structural maneuvers that occur over timescales ranging from
picoseconds to seconds. Here, we classify RNA dynamics into distinct modes
representing transitions between basins on a hierarchical free-energy landscape.
These transitions include large-scale secondary-structural transitions at >0.1-s
timescales, base-pair/tertiary dynamics at microsecond-to-millisecond timescales,
stacking dynamics at timescales ranging from nanoseconds to microseconds, and
other "jittering" motions at timescales ranging from picoseconds to nanoseconds.
We review various modes within these three different tiers, the different
mechanisms by which they are used to regulate function, and how they can be
coupled together to achieve greater functional complexity.