National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)
R37 AI059371
米国
引用
ジャーナル: Cell Rep / 年: 2020 タイトル: Structure of the Vesicular Stomatitis Virus L Protein in Complex with Its Phosphoprotein Cofactor. 著者: Simon Jenni / Louis-Marie Bloyet / Ruben Diaz-Avalos / Bo Liang / Sean P J Whelan / Nikolaus Grigorieff / Stephen C Harrison / 要旨: The large (L) proteins of non-segmented, negative-strand RNA viruses are multifunctional enzymes that produce capped, methylated, and polyadenylated mRNA and replicate the viral genome. A ...The large (L) proteins of non-segmented, negative-strand RNA viruses are multifunctional enzymes that produce capped, methylated, and polyadenylated mRNA and replicate the viral genome. A phosphoprotein (P), required for efficient RNA-dependent RNA polymerization from the viral ribonucleoprotein (RNP) template, regulates the function and conformation of the L protein. We report the structure of vesicular stomatitis virus L in complex with its P cofactor determined by electron cryomicroscopy at 3.0 Å resolution, enabling us to visualize bound segments of P. The contacts of three P segments with multiple L domains show how P induces a closed, compact, initiation-competent conformation. Binding of P to L positions its N-terminal domain adjacent to a putative RNA exit channel for efficient encapsidation of newly synthesized genomes with the nucleoprotein and orients its C-terminal domain to interact with an RNP template. The model shows that a conserved tryptophan in the priming loop can support the initiating 5' nucleotide.
使用したクラス数: 1 / 想定した対称性 - 点群: C1 (非対称) / アルゴリズム: FOURIER SPACE / 解像度のタイプ: BY AUTHOR / 解像度: 3.0 Å / 解像度の算出法: FSC 0.143 CUT-OFF / ソフトウェア - 名称: FREALIGN (ver. X) / ソフトウェア - 詳細: Part of cisTEM 詳細: Refinement and classification were limited to a resolution of 0.4 nm to produce unbiased resolution estimate at final estimate resolution. 使用した粒子像数: 83979
初期 角度割当
タイプ: PROJECTION MATCHING / ソフトウェア - 名称: FREALIGN (ver. X) / ソフトウェア - 詳細: Part of cisTEM / 詳細: A global search was performed at 0.8 nm resolution.
最終 角度割当
タイプ: PROJECTION MATCHING / ソフトウェア - 名称: FREALIGN (ver. X) / ソフトウェア - 詳細: Part of cisTEM
最終 3次元分類
クラス数: 2 / 平均メンバー数/クラス: 42304 / ソフトウェア - 名称: FREALIGN (ver. X) / ソフトウェア - 詳細: Part of cisTEM