EMDB/PDB/SASBDBから引用されている文献のデータベース

キーワード
構造解析手法	All X線回折 NMR 電子顕微鏡小角散乱中性子線回折線維回折粉末回折赤外分光 EPR FRET 理論モデルハイブリッド
著者・登録者
ジャーナル
IF	>30 >20 >10 >5 all

タイトル	Structural basis of AUC codon discrimination during translation initiation in yeast.
ジャーナル・号・ページ	Nucleic Acids Res, Year 2024
掲載日	2024年8月28日
著者	Laura Villamayor-Belinchón / Prafful Sharma / Yuliya Gordiyenko / Jose L Llácer / Tanweer Hussain /
PubMed 要旨	In eukaryotic translation initiation, the 48S preinitiation complex (PIC) scans the 5' untranslated region of mRNAs to search for the cognate start codon (AUG) with assistance from various ...In eukaryotic translation initiation, the 48S preinitiation complex (PIC) scans the 5' untranslated region of mRNAs to search for the cognate start codon (AUG) with assistance from various eukaryotic initiation factors (eIFs). Cognate start codon recognition is precise, rejecting near-cognate codons with a single base difference. However, the structural basis of discrimination of near-cognate start codons was not known. We have captured multiple yeast 48S PICs with a near-cognate AUC codon at the P-site, revealing that the AUC codon induces instability in the codon-anticodon at the P-site, leading to a disordered N-terminal tail of eIF1A. Following eIF1 dissociation, the N-terminal domain of eIF5 fails to occupy the vacant eIF1 position, and eIF2β becomes flexible. Consequently, 48S with an AUC codon is less favourable for initiation. Furthermore, we observe hitherto unreported metastable states of the eIF2-GTP-Met-tRNAMet ternary complex, where the eIF2β helix-turn-helix domain may facilitate eIF5 association by preventing eIF1 rebinding to 48S PIC. Finally, a swivelled head conformation of 48S PIC appears crucial for discriminating incorrect and selection of the correct codon-anticodon pair during translation initiation.
リンク	Nucleic Acids Res / PubMed:39193907
手法	EM (単粒子)
解像度	3.35 - 4.7 Å
構造データ	19541 8rw1 EMDB-19541, PDB-8rw1: Structure of a yeast 48S-AUC preinitiation complex in closed conformation 手法: EM (単粒子) / 解像度: 3.35 Å 19801 8s8d EMDB-19801, PDB-8s8d: Structure of a yeast 48S-AUC preinitiation complex in closed conformation (model py48S-AUC-2) 手法: EM (単粒子) / 解像度: 3.45 Å 19802 8s8e EMDB-19802, PDB-8s8e: Structure of a yeast 48S-AUC preinitiation complex in closed conformation (model py48S-AUC-3.1) 手法: EM (単粒子) / 解像度: 3.85 Å 19803 8s8f EMDB-19803, PDB-8s8f: Structure of a yeast 48S-AUC preinitiation complex in closed conformation (model py48S-AUC-3.2) 手法: EM (単粒子) / 解像度: 3.95 Å 19804 8s8g EMDB-19804, PDB-8s8g: Structure of a yeast 48S-AUC preinitiation complex in closed conformation (model py48S-AUC-2.1) 手法: EM (単粒子) / 解像度: 4.0 Å 19805 8s8h EMDB-19805, PDB-8s8h: Structure of a yeast 48S-AUC preinitiation complex in closed conformation (model py48S-AUC-2.2) 手法: EM (単粒子) / 解像度: 4.0 Å 19806 8s8i EMDB-19806, PDB-8s8i: Structure of a yeast 48S-AUC preinitiation complex in closed conformation (model py48S-AUC-eIF1) 手法: EM (単粒子) / 解像度: 4.3 Å 19807 8s8j EMDB-19807, PDB-8s8j: Structure of a yeast 48S-AUC preinitiation complex in closed conformation (model py48S-AUC-eIF5) 手法: EM (単粒子) / 解像度: 4.7 Å
化合物	ChemComp-MG: Unknown entry / マグネシウムジカチオン ChemComp-ZN: Unknown entry ChemComp-GCP: PHOSPHOMETHYLPHOSPHONIC ACID GUANYLATE ESTER / グアニリルメチレンジホスホン酸 / GMP-PCP, エネルギー貯蔵分子類似体YM ChemComp-MET: METHIONINE / メチオニン ChemComp-HOH*: WATER
由来	Kluyveromyces lactis (strain ATCC 8585 / CBS 2359 / DSM 70799 / NBRC 1267 / NRRL Y-1140 / WM37) (酵母) Saccharomyces cerevisiae (strain ATCC 204508 / S288c) (パン酵母) kluyveromyces lactis (酵母) kluyveromyces lactis nrrl y-1140 (酵母) saccharomyces cerevisiae s288c (パン酵母)
キーワード	RIBOSOME / translation / initiation factors / 40S / eIF1A / AUC codon / eIF2 / tRNAi / 48S PIC / small ribosome subunit