ジャーナル: Commun Biol / 年: 2019 タイトル: The atomic structures of shrimp nodaviruses reveal new dimeric spike structures and particle polymorphism. 著者: Nai-Chi Chen / Masato Yoshimura / Naoyuki Miyazaki / Hong-Hsiang Guan / Phimonphan Chuankhayan / Chien-Chih Lin / Shao-Kang Chen / Pei-Ju Lin / Yen-Chieh Huang / Kenji Iwasaki / Atsushi ...著者: Nai-Chi Chen / Masato Yoshimura / Naoyuki Miyazaki / Hong-Hsiang Guan / Phimonphan Chuankhayan / Chien-Chih Lin / Shao-Kang Chen / Pei-Ju Lin / Yen-Chieh Huang / Kenji Iwasaki / Atsushi Nakagawa / Sunney I Chan / Chun-Jung Chen / 要旨: Shrimp nodaviruses, including (PvNV) and nodaviruses (MrNV), cause white-tail disease in shrimps, with high mortality. The viral capsid structure determines viral assembly and host specificity ...Shrimp nodaviruses, including (PvNV) and nodaviruses (MrNV), cause white-tail disease in shrimps, with high mortality. The viral capsid structure determines viral assembly and host specificity during infections. Here, we show cryo-EM structures of = 3 and = 1 PvNV-like particles (PvNV-LPs), crystal structures of the protrusion-domains (P-domains) of PvNV and MrNV, and the crystal structure of the ∆N-ARM-PvNV shell-domain (S-domain) in = 1 subviral particles. The capsid protein of PvNV reveals five domains: the P-domain with a new jelly-roll structure forming cuboid-like spikes; the jelly-roll S-domain with two calcium ions; the linker between the S- and P-domains exhibiting new cross and parallel conformations; the N-arm interacting with nucleotides organized along icosahedral two-fold axes; and a disordered region comprising the basic -terminal arginine-rich motif (N-ARM) interacting with RNA. The N-ARM controls = 3 and = 1 assemblies. Increasing the /-termini flexibility leads to particle polymorphism. Linker flexibility may influence the dimeric-spike arrangement.
構造決定の手法: 分子置換 / 解像度: 1.39→23.87 Å / Cor.coef. Fo:Fc: 0.974 / Cor.coef. Fo:Fc free: 0.973 / SU B: 0.582 / SU ML: 0.025 / 交差検証法: THROUGHOUT / ESU R: 0.047 / ESU R Free: 0.045 / 立体化学のターゲット値: MAXIMUM LIKELIHOOD / 詳細: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
Rfactor
反射数
%反射
Selection details
Rfree
0.1514
1485
5.1 %
RANDOM
Rwork
0.14172
-
-
-
obs
0.1422
27637
99.14 %
-
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