ジャーナル: Structure / 年: 2013 タイトル: The asymmetric structure of an icosahedral virus bound to its receptor suggests a mechanism for genome release. 著者: Kyle C Dent / Rebecca Thompson / Amy M Barker / Julian A Hiscox / John N Barr / Peter G Stockley / Neil A Ranson / 要旨: Simple, spherical RNA viruses have well-understood, symmetric protein capsids, but little structural information is available for their asymmetric components, such as minor proteins and their ...Simple, spherical RNA viruses have well-understood, symmetric protein capsids, but little structural information is available for their asymmetric components, such as minor proteins and their genomes, which are vital for infection. Here, we report an asymmetric structure of bacteriophage MS2, attached to its receptor, the F-pilus. Cryo-electron tomography and subtomographic averaging of such complexes result in a structure containing clear density for the packaged genome, implying that the conformation of the genome is the same in each virus particle. The data also suggest that the single-copy viral maturation protein breaks the symmetry of the capsid, occupying a position that would be filled by a coat protein dimer in an icosahedral shell. This capsomere can thus fulfill its known biological roles in receptor and genome binding and suggests an exit route for the genome during infection.
全体 : Bacteriophage MS2 bound to its receptor, the E. coli F-pilus
全体
名称: Bacteriophage MS2 bound to its receptor, the E. coli F-pilus
要素
試料: Bacteriophage MS2 bound to its receptor, the E. coli F-pilus
ウイルス: Enterobacterio phage MS2 (ファージ)
細胞器官・細胞要素: F-Pilus
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超分子 #1000: Bacteriophage MS2 bound to its receptor, the E. coli F-pilus
超分子
名称: Bacteriophage MS2 bound to its receptor, the E. coli F-pilus タイプ: sample / ID: 1000 / 詳細: Sub-tomographic averaging of virus-decorated pili 集合状態: One T=3 icosahedral virus bound to a pilus fibre Number unique components: 2
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超分子 #1: Enterobacterio phage MS2
超分子
名称: Enterobacterio phage MS2 / タイプ: virus / ID: 1 / NCBI-ID: 12022 / 生物種: Enterobacterio phage MS2 / ウイルスタイプ: VIRION / ウイルス・単離状態: SPECIES / ウイルス・エンベロープ: No / ウイルス・中空状態: No