+検索条件
-Structure paper
タイトル | Structural characterization of mRNA-tRNA translocation intermediates. |
---|---|
ジャーナル・号・ページ | Proc Natl Acad Sci U S A, Vol. 109, Issue 16, Page 6094-6099, Year 2012 |
掲載日 | 2012年4月17日 |
著者 | Xabier Agirrezabala / Hstau Y Liao / Eduard Schreiner / Jie Fu / Rodrigo F Ortiz-Meoz / Klaus Schulten / Rachel Green / Joachim Frank / |
PubMed 要旨 | Cryo-EM analysis of a wild-type Escherichia coli pretranslocational sample has revealed the presence of previously unseen intermediate substates of the bacterial ribosome during the first phase of ...Cryo-EM analysis of a wild-type Escherichia coli pretranslocational sample has revealed the presence of previously unseen intermediate substates of the bacterial ribosome during the first phase of translocation, characterized by intermediate intersubunit rotations, L1 stalk positions, and tRNA configurations. Furthermore, we describe the domain rearrangements in quantitative terms, which has allowed us to characterize the processivity and coordination of the conformational reorganization of the ribosome, along with the associated changes in tRNA ribosome-binding configuration. The results are consistent with the view of the ribosome as a molecular machine employing Brownian motion to reach a functionally productive state via a series of substates with incremental changes in conformation. |
リンク | Proc Natl Acad Sci U S A / PubMed:22467828 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 11.5 - 14.7 Å |
構造データ | EMDB-5359: New mRNA-tRNA translocation intermediates revealed by cryoEM: Class 4A (partially rotated (I) 70S ribosome with A-site and P-site tRNAs) EMDB-5360: New mRNA-tRNA translocation intermediates revealed by cryoEM: Class 3 (unrotated 70S ribosome with P-site tRNA) EMDB-5361: New mRNA-tRNA translocation intermediates revealed by cryoEM: Class 2 (unrotated 70S ribosome with A-site and P-site tRNAs) EMDB-5362: New mRNA-tRNA translocation intermediates revealed by cryoEM: Class 6 (rotated 70S ribosome with A-site and P-site tRNAs) |
化合物 | ChemComp-FME: ChemComp-TRP: |
由来 |
|
キーワード | RIBOSOME / cryoelectron microscopy / molecular dynamics flexible fitting / ratchet-like rotation |