Biological and immunological characteristics of hepatitis E virus-like particles based on the crystal structure.
Hepatitis E virus (HEV) is a causative agent of acute hepatitis. The crystal structure of HEV-like particles (HEV-LP) consisting of capsid protein was determined at 3.5-A resolution. The capsid protein exhibited a quite different folding at the protruding and middle domains from the members of the families of Caliciviridae and Tombusviridae, while the shell domain shared the common folding. Tyr-288 at the 5-fold axis plays key roles in the assembly of HEV-LP, and aromatic amino acid residues are well conserved among the structurally related viruses. Mutational analyses indicated that the protruding domain is involved in the binding to the cells susceptive to HEV infection and has some neutralization epitopes. These structural and biological findings are important for understanding the molecular mechanisms of assembly and entry of HEV and also provide clues in the development of preventive and prophylactic measures for hepatitis E.
Yamashita
Tetsuo
T
Department of Molecular Virology, Research Institute for Microbial Diseases, Osaka University, Osaka 565-0871, Japan.
Mori
Yoshio
Y
Miyazaki
Naoyuki
N
Cheng
R Holland
RH
Yoshimura
Masato
M
Unno
Hideaki
H
Shima
Ryoichi
R
Moriishi
Kohji
K
Tsukihara
Tomitake
T
Li
Tian Cheng
TC
Takeda
Naokazu
N
Miyamura
Tatsuo
T
Matsuura
Yoshiharu
Y
D000818:Animals; D036022:Capsid Proteins / Q000737:chemistry* / Q000276:immunology; D002460:Cell Line; D003460:Crystallization; D019281:Dimerization; D018604:Epitope Mapping; D005838:Genotype; D016752:Hepatitis E virus / Q000737:chemistry* / Q000276:immunology; D017433:Protein Structure, Secondary; D018411:Spodoptera; D014771:Virion / Q000737:chemistry* / Q000276:immunology; D019065:Virus Assembly
D036022:Capsid Proteins