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-Structure paper
タイトル | Decoding Mammalian Ribosome-mRNA States by Translational GTPase Complexes. |
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ジャーナル・号・ページ | Cell, Vol. 167, Issue 5, Page 1229-1240.e15, Year 2016 |
掲載日 | 2016年11月17日 |
著者 | Sichen Shao / Jason Murray / Alan Brown / Jack Taunton / V Ramakrishnan / Ramanujan S Hegde / |
PubMed 要旨 | In eukaryotes, accurate protein synthesis relies on a family of translational GTPases that pair with specific decoding factors to decipher the mRNA code on ribosomes. We present structures of the ...In eukaryotes, accurate protein synthesis relies on a family of translational GTPases that pair with specific decoding factors to decipher the mRNA code on ribosomes. We present structures of the mammalian ribosome engaged with decoding factor⋅GTPase complexes representing intermediates of translation elongation (aminoacyl-tRNA⋅eEF1A), termination (eRF1⋅eRF3), and ribosome rescue (Pelota⋅Hbs1l). Comparative analyses reveal that each decoding factor exploits the plasticity of the ribosomal decoding center to differentially remodel ribosomal proteins and rRNA. This leads to varying degrees of large-scale ribosome movements and implies distinct mechanisms for communicating information from the decoding center to each GTPase. Additional structural snapshots of the translation termination pathway reveal the conformational changes that choreograph the accommodation of decoding factors into the peptidyl transferase center. Our results provide a structural framework for how different states of the mammalian ribosome are selectively recognized by the appropriate decoding factor⋅GTPase complex to ensure translational fidelity. |
リンク | Cell / PubMed:27863242 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 3.06 - 3.99 Å |
構造データ | EMDB-4129: EMDB-4130, PDB-5lzs: EMDB-4131, PDB-5lzt: EMDB-4132, PDB-5lzu: EMDB-4133, PDB-5lzv: EMDB-4134, PDB-5lzw: EMDB-4135, PDB-5lzx: |
化合物 | ChemComp-MG: ChemComp-ZN: ChemComp-GDP: ChemComp-7C4: ChemComp-GCP: ChemComp-SF4: |
由来 |
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キーワード | RIBOSOME / Translation / Elongation |