National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
R01GM122797
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
5DP1GM133052
米国
National Science Foundation (NSF, United States)
CMMI-1333215
米国
National Science Foundation (NSF, United States)
CMMI-1344915
米国
National Science Foundation (NSF, United States)
CBET-1729397
米国
引用
ジャーナル: Nat Methods / 年: 2022 タイトル: Sub-3-Å cryo-EM structure of RNA enabled by engineered homomeric self-assembly. 著者: Di Liu / François A Thélot / Joseph A Piccirilli / Maofu Liao / Peng Yin / 要旨: High-resolution structural studies are essential for understanding the folding and function of diverse RNAs. Herein, we present a nanoarchitectural engineering strategy for efficient structural ...High-resolution structural studies are essential for understanding the folding and function of diverse RNAs. Herein, we present a nanoarchitectural engineering strategy for efficient structural determination of RNA-only structures using single-particle cryogenic electron microscopy (cryo-EM). This strategy-ROCK (RNA oligomerization-enabled cryo-EM via installing kissing loops)-involves installing kissing-loop sequences onto the functionally nonessential stems of RNAs for homomeric self-assembly into closed rings with multiplied molecular weights and mitigated structural flexibility. ROCK enables cryo-EM reconstruction of the Tetrahymena group I intron at 2.98-Å resolution overall (2.85 Å for the core), allowing de novo model building of the complete RNA, including the previously unknown peripheral domains. ROCK is further applied to two smaller RNAs-the Azoarcus group I intron and the FMN riboswitch, revealing the conformational change of the former and the bound ligand in the latter. ROCK holds promise to greatly facilitate the use of cryo-EM in RNA structural studies.
A: 119.04 Å / B: 100.44 Å / C: 99.2 Å α=β=γ: 90.0 °
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添付データ
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試料の構成要素
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全体 : Exon-free state of Tetrahymena group I intron, symmetry-expanded ...
全体
名称: Exon-free state of Tetrahymena group I intron, symmetry-expanded monomer from a synthetic trimeric construct
要素
複合体: Exon-free state of Tetrahymena group I intron, symmetry-expanded monomer from a synthetic trimeric construct
RNA: Group I intron
リガンド: MAGNESIUM ION
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超分子 #1: Exon-free state of Tetrahymena group I intron, symmetry-expanded ...
超分子
名称: Exon-free state of Tetrahymena group I intron, symmetry-expanded monomer from a synthetic trimeric construct タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1