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Title: Accelerated cryo-EM-guided determination of three-dimensional RNA-only structures

Journal Article · · Nature Methods
ORCiD logo [1]; ORCiD logo [2];  [3];  [1];  [1]; ORCiD logo [2]; ORCiD logo [2];  [1]; ORCiD logo [1]; ORCiD logo [1];  [4]; ORCiD logo [5]; ORCiD logo [1]
  1. Stanford Univ., CA (United States)
  2. Stanford Univ., CA (United States). James H. Clark Center
  3. Stanford Univ., CA (United States). James H. Clark Center; Sichuan Univ. (China). West China Hospital, State Key Lab. of Biotherapy
  4. Stanford Univ., CA (United States); Univ. of Nebraska, Lincoln, NE (United States)
  5. Stanford Univ., CA (United States); Stanford Univ., CA (United States). James H. Clark Center; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL)

The discovery and design of biologically important RNA molecules is outpacing three-dimensional structural characterization. In this work, we demonstrate that cryo-electron microscopy can routinely resolve maps of RNA-only systems and that these maps enable subnanometer-resolution coordinate estimation when complemented with multidimensional chemical mapping and Rosetta DRRAFTER computational modeling. Furthermore ,this hybrid ‘Ribosolve’ pipeline detects and falsifies homologies and conformational rearrangements in 11 previously unknown 119- to 338-nucleotide protein-free RNA structures: full-length Tetrahymena ribozyme, hc16 ligase with and without substrate, full-length Vibrio cholerae and Fusobacterium nucleatum glycine riboswitch aptamers with and without glycine, Mycobacterium SAM-IV riboswitch with and without S-adenosylmethionine, and the computer-designed ATP-TTR-3 aptamer with and without AMP. Simulation benchmarks, blind challenges, compensatory mutagenesis, cross-RNA homologies and internal controls demonstrate that Ribosolve can accurately resolve the global architectures of RNA molecules but does not resolve atomic details. These tests offer guidelines for making inferences in future RNA structural studies with similarly accelerated throughput.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Institutes of Health (NIH); National Science Foundation (NSF)
Grant/Contract Number:
AC02-76SF00515; R01GM079429; R35 GM112579; P01AI120943; S10 OD021600; R21 AI145647; U54GM103297; P41GM103832; GRFP
OSTI ID:
1646882
Journal Information:
Nature Methods, Vol. 17, Issue 7; ISSN 1548-7091
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 75 works
Citation information provided by
Web of Science

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