ジャーナル: Structure / 年: 2017 タイトル: Structure of a Reptilian Adenovirus Reveals a Phage Tailspike Fold Stabilizing a Vertebrate Virus Capsid. 著者: Rosa Menéndez-Conejero / Thanh H Nguyen / Abhimanyu K Singh / Gabriela N Condezo / Rachel E Marschang / Mark J van Raaij / Carmen San Martín / 要旨: Although non-human adenoviruses (AdVs) might offer solutions to problems posed by human AdVs as therapeutic vectors, little is known about their basic biology. In particular, there are no structural ...Although non-human adenoviruses (AdVs) might offer solutions to problems posed by human AdVs as therapeutic vectors, little is known about their basic biology. In particular, there are no structural studies on the complete virion of any AdV with a non-mammalian host. We combine mass spectrometry, cryo-electron microscopy, and protein crystallography to characterize the composition and structure of a snake AdV (SnAdV-1, Atadenovirus genus). SnAdV-1 particles contain the genus-specific proteins LH3, p32k, and LH2, a previously unrecognized structural component. Remarkably, the cementing protein LH3 has a trimeric β helix fold typical of bacteriophage host attachment proteins. The organization of minor coat proteins differs from that in human AdVs, correlating with higher thermostability in SnAdV-1. These findings add a new piece to the intriguing puzzle of virus evolution, hint at the use of cell entry pathways different from those in human AdVs, and will help development of new, thermostable SnAdV-1-based vectors.
WE FOUND SEVERAL SEQUENCE DIFFERENCES BETWEEN OUR PCR- AMPLIFIED GENE AND THE DATABASE. HOWEVER, WE ...WE FOUND SEVERAL SEQUENCE DIFFERENCES BETWEEN OUR PCR- AMPLIFIED GENE AND THE DATABASE. HOWEVER, WE CONFIRMED OUR SEQUENCE IS CORRECT BY MASS SPECTROMETRY. THE EXPRESSED PROTEIN CONTAINS AN N-TERMINAL EXPRESSION AND PURIFICATION TAG, WHICH MAY OR MAY NOT HAVE BEEN CLEAVED OFF DURING THE CRYSTALLIZATION PROCESS.
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実験情報
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実験
実験
手法: X線回折 / 使用した結晶の数: 1
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試料調製
結晶
マシュー密度: 2.13 Å3/Da / 溶媒含有率: 42.3 % / 解説: NONE
結晶化
pH: 8.5 詳細: 10 MM TRIS-HCL PH 8.5, 20% (W/V) PEG3350, 0.2 M AMMONIUM ACETATE
解像度: 2→30 Å / Cor.coef. Fo:Fc: 0.959 / Cor.coef. Fo:Fc free: 0.92 / SU B: 6.131 / SU ML: 0.158 / 交差検証法: THROUGHOUT / ESU R: 0.19 / ESU R Free: 0.169 / 立体化学のターゲット値: MAXIMUM LIKELIHOOD 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS. HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS, U VALUES REFINED INDIVIDUALLY, RESIDUES 156-162 FROM CHAINS A, D AND F, AND 156-161 FROM ...詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS. HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS, U VALUES REFINED INDIVIDUALLY, RESIDUES 156-162 FROM CHAINS A, D AND F, AND 156-161 FROM CHAIN C ARE DISORDERED.
Rfactor
反射数
%反射
Selection details
Rfree
0.22569
1945
1.5 %
RANDOM
Rwork
0.17224
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obs
0.17305
128200
94.17 %
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溶媒の処理
イオンプローブ半径: 0.8 Å / 減衰半径: 0.8 Å / VDWプローブ半径: 1.2 Å / 溶媒モデル: MASK