ジャーナル: Elife / 年: 2013 タイトル: A new topology of the HK97-like fold revealed in Bordetella bacteriophage by cryoEM at 3.5 A resolution. 著者: Xing Zhang / Huatao Guo / Lei Jin / Elizabeth Czornyj / Asher Hodes / Wong H Hui / Angela W Nieh / Jeff F Miller / Z Hong Zhou / 要旨: Bacteriophage BPP-1 infects and kills Bordetella species that cause whooping cough. Its diversity-generating retroelement (DGR) provides a naturally occurring phage-display system, but engineering ...Bacteriophage BPP-1 infects and kills Bordetella species that cause whooping cough. Its diversity-generating retroelement (DGR) provides a naturally occurring phage-display system, but engineering efforts are hampered without atomic structures. Here, we report a cryo electron microscopy structure of the BPP-1 head at 3.5 Å resolution. Our atomic model shows two of the three protein folds representing major viral lineages: jellyroll for its cement protein (CP) and HK97-like ('Johnson') for its major capsid protein (MCP). Strikingly, the fold topology of MCP is permuted non-circularly from the Johnson fold topology previously seen in viral and cellular proteins. We illustrate that the new topology is likely the only feasible alternative of the old topology. β-sheet augmentation and electrostatic interactions contribute to the formation of non-covalent chainmail in BPP-1, unlike covalent inter-protein linkages of the HK97 chainmail. Despite these complex interactions, the termini of both CP and MCP are ideally positioned for DGR-based phage-display engineering. DOI: http://dx.doi.org/10.7554/eLife.01299.001.
全体 : Bordetella bacteriophage major capsid protein (MCP)
全体
名称: Bordetella bacteriophage major capsid protein (MCP)
要素
試料: Bordetella bacteriophage major capsid protein (MCP)
タンパク質・ペプチド: major capsid protein
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超分子 #1000: Bordetella bacteriophage major capsid protein (MCP)
超分子
名称: Bordetella bacteriophage major capsid protein (MCP) / タイプ: sample / ID: 1000 / 詳細: This is the averaged MCP density of EMD-5764. / Number unique components: 1
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分子 #1: major capsid protein
分子
名称: major capsid protein / タイプ: protein_or_peptide / ID: 1 / Name.synonym: MCP / 詳細: This is the averaged MCP density of EMD-5764. / 組換発現: No / データベース: NCBI
アルゴリズム: OTHER / 解像度のタイプ: BY AUTHOR / 解像度: 3.5 Å / 解像度の算出法: OTHER / ソフトウェア - 名称: eLite3D, Frealign / 詳細: This is the averaged MCP density of EMD-5764. / 使用した粒子像数: 39549