- EMDB-21531: Head masked 3D refined density of the Cricket Paralysis Virus 5-U... -
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基本情報
登録情報
データベース: EMDB / ID: EMD-21531
タイトル
Head masked 3D refined density of the Cricket Paralysis Virus 5-UTR IRES (CrPV 5-UTR-IRES) bound to the small ribosomal subunit used to build the 5-UTR IRES model
マップデータ
Sharpened map after post processing for head masked
試料
複合体: Cricket Paralysis Virus 5-UTR IRES (CrPV 5-UTR-IRES) bound to the small ribosomal subunit from a head masked 3D refinement
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM097014
米国
引用
ジャーナル: Elife / 年: 2020 タイトル: A complex IRES at the 5'-UTR of a viral mRNA assembles a functional 48S complex via an uAUG intermediate. 著者: Ritam Neupane / Vera P Pisareva / Carlos F Rodriguez / Andrey V Pisarev / Israel S Fernández / 要旨: Taking control of the cellular apparatus for protein production is a requirement for virus progression. To ensure this control, diverse strategies of cellular mimicry and/or ribosome hijacking have ...Taking control of the cellular apparatus for protein production is a requirement for virus progression. To ensure this control, diverse strategies of cellular mimicry and/or ribosome hijacking have evolved. The initiation stage of translation is especially targeted as it involves multiple steps and the engagement of numerous initiation factors. The use of structured RNA sequences, called nternal ibosomal ntry ites (IRES), in viral RNAs is a widespread strategy for the exploitation of eukaryotic initiation. Using a combination of electron cryo-microscopy (cryo-EM) and reconstituted translation initiation assays with native components, we characterized how a novel IRES at the 5'-UTR of a viral RNA assembles a functional initiation complex via an uAUG intermediate. The IRES features a novel extended, multi-domain architecture, that circles the 40S head. The structures and accompanying functional data illustrate the importance of 5'-UTR regions in translation regulation and underline the relevance of the untapped diversity of viral IRESs.
名称: Cricket Paralysis Virus 5-UTR IRES (CrPV 5-UTR-IRES) bound to the small ribosomal subunit from a head masked 3D refinement タイプ: complex / ID: 1 / 親要素: 0 / 含まれる分子: #1-#43
由来(天然)
生物種: Oryctolagus cuniculus (ウサギ)
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実験情報
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構造解析
手法
クライオ電子顕微鏡法
解析
単粒子再構成法
試料の集合状態
particle
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試料調製
緩衝液
pH: 7.5
凍結
凍結剤: ETHANE / チャンバー内湿度: 100 % / チャンバー内温度: 277.15 K / 装置: FEI VITROBOT MARK IV 詳細: Grids were blotted for 2.5s and flash cooled in liquid ethane.