title: Persistent and lytic infections with SSPE virus: a comparison of the synthesis of virus-specific polypeptides.
abstract: The synthesis of virus-specific polypeptides and messenger RNA in cell cultures persistently infected with an isolate of measles virus from a patient with subacute sclerosing panencephalitis (SSPE) has been compared to that found in a lytic infection with the homologous virus. The persistent infection described here was chosen as its biological characteristics reflect those of virus-infected brain cells from SSPE patients. The synthesis of H, N and possibly F protein was seen in both lytic and persistent infections, but the synthesis of M protein was only detected in the lytic infection. However, messenger RNA isolated from either the lytic or persistent infection directed the synthesis in a cell-free translation system of all structural polypeptides, including M, and also three non-structural polypeptides, with mol. wt. of 34 000, 30 000 and 18 000. Messenger RNAs coding for the virus-specific polypeptides were also shown to be polyadenylated. In addition, those polypeptides made in vitro which were antigenically related to the haemagglutinin, demonstrated structural changes after passage through a persistent infection.
mesh_terms: D000818:Animals; D002460:Cell Line; D002522:Chlorocebus aethiops; D008970:Molecular Weight; D010452:Peptide Biosynthesis; D014176:Protein Biosynthesis; D012333:RNA, Messenger / Q000378:metabolism; D012367:RNA, Viral / Q000378:metabolism; D013190:SSPE Virus / Q000254:growth & development / Q000378:metabolism*; D014763:Viral Matrix Proteins; D014764:Viral Proteins / Q000096:biosynthesis*
chemical_list: D012333:RNA, Messenger; D012367:RNA, Viral; D014763:Viral Matrix Proteins; D014764:Viral Proteins