How accurately and precisely can RNA structure be determined by NMR?

The great diversity of RNA biological functions has led to widespread interest in RNA structure. Advances in synthetic and spectroscopic techniques have recently allowed the extension of NMR methods of structure determination to RNA structures of significant size and increased biological significanc...

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Bibliographic Details
Published in:Journal of molecular biology 1997-03, Vol.267 (2), p.338-351
Main Authors: Allain, Frédéric H-.T, Varani, Gabriele
Format: Article
Language:English
Subjects:
accuracy
Base Composition
Magnetic Resonance Spectroscopy
Models, Molecular
NMR
Nucleic Acid Conformation
precision
Proteins - chemistry
Reproducibility of Results
RNA - chemistry
RNA structure
RNA, Catalytic - chemistry
Software
structure determination
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Summary:The great diversity of RNA biological functions has led to widespread interest in RNA structure. Advances in synthetic and spectroscopic techniques have recently allowed the extension of NMR methods of structure determination to RNA structures of significant size and increased biological significance. However, it has not yet been established how accurately and precisely RNA structure can be determined by NMR. The extensive simulations presented here establish credible limits on accuracy and precision of NMR-derived RNA structures and provide quantitative calibrations to evaluate new structures. Synthetic sets of NMR constraints were generated from a crystallographically-derived ribozyme structure. The target structure was then redetermined using approximations and computational protocols derived from our experimental work. The results demonstrate that the structure of RNA molecules of at least 15,000 Da can be determined with precision and accuracy of 1 to 1.5 Å, comparable to values obtained for proteins of similar size. Most encouragingly, it is shown that larger, globular and biologically more important RNA structures can be determined with significantly better accuracy and precision than smaller, elongated structures investigated until now.
ISSN:0022-2836
1089-8638
DOI:10.1006/jmbi.1996.0855