National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)
1RO1AI118933
米国
National Science Foundation (NSF, United States)
CBET 1803440
米国
引用
ジャーナル: Small / 年: 2020 タイトル: Virus Assembly Pathways: Straying Away but Not Too Far. 著者: Kevin Bond / Irina B Tsvetkova / Joseph Che-Yen Wang / Martin F Jarrold / Bogdan Dragnea / 要旨: Non-enveloped RNA viruses pervade all domains of life. In a cell, they co-assemble from viral RNA and capsid proteins. Virus-like particles can form in vitro where virtually any non-cognate ...Non-enveloped RNA viruses pervade all domains of life. In a cell, they co-assemble from viral RNA and capsid proteins. Virus-like particles can form in vitro where virtually any non-cognate polyanionic cargo can be packaged. How only viral RNA gets selected for packaging in vivo, in presence of myriad other polyanionic species, has been a puzzle. Through a combination of charge detection mass spectrometry and cryo-electron microscopy, it is determined that co-assembling brome mosaic virus (BMV) coat proteins and nucleic acid oligomers results in capsid structures and stoichiometries that differ from the icosahedral virion. These previously unknown shell structures are strained and less stable than the native one. However, they contain large native structure fragments that can be recycled to form BMV virions, should a viral genome become available. The existence of such structures suggest the possibility of a previously unknown regulatory pathway for the packaging process inside cells.
名称: Brome mosaic virus / タイプ: virus / ID: 1 / 親要素: 0 詳細: The purified BMV was disassembled and the RNA precipitated. The capsid protein was then assembled with 52 nt from a T-like region of the BMV RNA. NCBI-ID: 12302 / 生物種: Brome mosaic virus / ウイルスタイプ: VIRUS-LIKE PARTICLE / ウイルス・単離状態: OTHER / ウイルス・エンベロープ: No / ウイルス・中空状態: No
宿主
生物種: Nicotiana benthamiana (ナス科)
分子量
実験値: 3.4 MDa
ウイルス殻
Shell ID: 1 / 名称: capsid / 直径: 265.0 Å
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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: 4.5 / 構成要素 - 濃度: 100.0 mM / 構成要素 - 名称: Ammonium acetate 詳細: 100 mM ammonium acetate that was pH adjusted to 4.5 with acetic acid