Small-angle X-ray scattering: a bridge between RNA secondary structures and three-dimensional topological structures

Current Opinion in Structural Biology
Xianyang FangYun-Xing Wang

Abstract

Whereas the structures of small to medium-sized well folded RNA molecules often can be determined by either X-ray crystallography or NMR spectroscopy, obtaining structural information for large RNAs using experimental, computational, or combined approaches remains a major interest and challenge. RNA is very sensitive to small-angle X-ray scattering (SAXS) due to high electron density along phosphate-sugar backbones, whose scattering contribution dominates SAXS intensity. For this reason, SAXS is particularly useful in obtaining global RNA structural information that outlines backbone topologies and, therefore, molecular envelopes. Such information is extremely valuable in bridging the gap between the secondary structures and three-dimensional topological structures of RNA molecules, particularly those that have proven difficult to study using other structure-determination methods. Here we review published results of RNA topological structures derived from SAXS data or in combination with other experimental data, as well as details on RNA sample preparation for SAXS experiments.

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Citations

Dec 15, 2015·Journal of Molecular Biology·Gabriel CornilescuSamuel E Butcher
Apr 14, 2016·Wiley Interdisciplinary Reviews. RNA·Yujie Chen, Lois Pollack
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Sep 2, 2020·Proceedings of the National Academy of Sciences of the United States of America·Yan WangXianyang Fang
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Nov 17, 2020·Journal of Molecular Biology·Ina P O'CarrollYun-Xing Wang
Jun 9, 2021·ChemMedChem·Kasper P LundquistMads H Clausen

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