Separation,Purification and Identification of Structural Proteins of Hepatitis A Virus
Abstract: A cell line persistently infected by Hepatitis A virus (HAV) was ultilized to produce high yield viral particles of HAV. HAV particles were recovered in a single ultracentrifugation step through discontinuous sucrose/glycerol density gradients. Three kinds of major structural protein of HAV were separated and purified by high performance liquid chormatography. SDS PAGE demonstrated the molecular weight of three structural proteins of HAV being 33, 29 and 27?kD. The special immune reactions were shown in Western blot test, suggesting the proteins with 33, 29 and 27?kD are VP\-1, VP\-2 and VP\-3 of the virus, respectively. The total contents of the proteins, VP\-1, VP\-2 and VP\-3 were respectively 687, 220.8, 68 and 213.6?g from 11?200?cm\+2 cells infected with HAV. The highly purified particles and sturctural proteins of HAV may be used in research for the development of vaccine, clinical diagnosis and pathogenesis of HAV.