ジャーナル: J Mol Biol / 年: 2006 タイトル: Evolution of bacteriophage tails: Structure of T4 gene product 10. 著者: Petr G Leiman / Mikhail M Shneider / Vadim V Mesyanzhinov / Michael G Rossmann / 要旨: The success of tailed bacteriophages to infect cells far exceeds that of most other viruses on account of their specialized tail and associated baseplate structures. The baseplate protein gene ...The success of tailed bacteriophages to infect cells far exceeds that of most other viruses on account of their specialized tail and associated baseplate structures. The baseplate protein gene product (gp) 10 of bacteriophage T4, whose structure was determined to 1.2 A resolution, was fitted into the cryo-electron microscopy structures of the pre and post-infection conformations of the virus. gp10 functions as a molecular lever that rotates and extends the hinged short tail fibers to facilitate cell attachment. The central folding motif of the gp10 trimer is similar to that of the baseplate protein gp11 and to the receptor-binding domain of the short tail fiber, gp12. The three proteins comprise the periphery of the baseplate and interact with each other. The structural and functional similarities of gp10, gp11, and gp12 and their sequential order in the T4 genome suggest that they evolved separately, subsequent to gene triplication from a common ancestor. Such events are usual in the evolution of complex organelles from a common primordial molecule.
A: Baseplate structural protein Gp10 B: Baseplate structural protein Gp10 C: Baseplate structural protein Gp10 D: Baseplate structural protein Gp10 E: Baseplate structural protein Gp10 F: Baseplate structural protein Gp10 G: Baseplate structural protein Gp10 H: Baseplate structural protein Gp10 I: Baseplate structural protein Gp10 J: Baseplate structural protein Gp10 K: Baseplate structural protein Gp10 L: Baseplate structural protein Gp10 M: Baseplate structural protein Gp10 N: Baseplate structural protein Gp10 O: Baseplate structural protein Gp10 P: Baseplate structural protein Gp10 Q: Baseplate structural protein Gp10 R: Baseplate structural protein Gp10
名称: bacteriophage T4 baseplate / タイプ: VIRUS 詳細: The trimeric gene product 10 is a structural component of the sixfold-symmetric T4 baseplate. The entry contains the fit of the gp10 C-terminal domain crystal structure (residues 406-602) and ...詳細: The trimeric gene product 10 is a structural component of the sixfold-symmetric T4 baseplate. The entry contains the fit of the gp10 C-terminal domain crystal structure (residues 406-602) and the homology model of the gp10 N-terminal domain (residues 1-160) into the cryoEM map of the T4 baseplate in the star conformation (EMDB ID 1086). The homology model of the N-terminal domains is based on the crystal structure of T4 gp9 (PDB ID 1S2E). 由来: NATURAL
モード: BRIGHT FIELD / 倍率(公称値): 45000 X / 最大 デフォーカス(公称値): 3400 nm / 最小 デフォーカス(公称値): 500 nm
撮影
電子線照射量: 20 e/Å2 / フィルム・検出器のモデル: KODAK SO-163 FILM
-
解析
EMソフトウェア
ID
名称
カテゴリ
1
SITUS COLORES
モデルフィッティング
2
SPIDER
3次元再構成
対称性
点対称性: C6 (6回回転対称)
3次元再構成
解像度: 17 Å / 粒子像の数: 1965 詳細: THE COORDINATES CONTAIN CA ONLY. RESIDUES 161-405 ARE MISSING. PLEASE SEE THE RELATED EMDB ENTRY FOR DETAILS OF THE EM RECONSTRUCTION 対称性のタイプ: POINT
原子モデル構築
プロトコル: RIGID BODY FIT / 空間: REAL Target criteria: correlation coefficient as defined by the program COLORES/SITUS 詳細: METHOD--laplacian filtered real space REFINEMENT PROTOCOL--rigid body