title: Biosynthesis and morphogenesis of group C rotavirus in swine testicular cells.
abstract: Polypeptide synthesis and morphogenesis of a group C rotavirus (AmC-1) adapted to a continuous swine testicular cell line was examined. SDS-PAGE analysis of 35S methionine labeled infected cell lysates revealed 9 viral polypeptides (122, 98, 79, 78, 43, 41, 35, 24, and 20 kD). Viral polypeptide synthesis appeared to be maximal at 7-10h post infection. Purified group C virus grown in the presence of trypsin was found to contain seven structural polypeptides (122, 98, 79, 53, 43, 41, and 30 kD) by protein blotting and five polypeptides (98, 79, 78, 43, and 41 kD) by immunoprecipitation with a hyperimmune rabbit antisera. Tunicamycin treatment, Concanavalin A binding, protein blotting, endo-H treatment and 2,6H-mannose labeling suggested that group C rotavirus contains one structural glycoprotein (41 kD) with a corresponding precursor mol. wt. of 37 kD and one not previously identified nonstructural glycoprotein (24 kD) with a corresponding precursor mol. wt. of < or = 20 kD. Electron microscopy of infected swine testicular cells revealed an assembly process for group C rotavirus similar to group A, with single-shelled particles budding through the rough endoplasmic reticulum with concomitant acquisition of a transient membrane.
authors.affiliation: Department of Virology, Swedish Institute for Infectious Disease Control, Stockholm.
authors.forename: M
authors.initials: M
authors.lastname: Nilsson
authors.forename: C H
authors.initials: CH
authors.lastname: von Bonsdorff
authors.forename: L
authors.initials: L
authors.lastname: Svensson
mesh_terms: D000818:Animals; D015153:Blotting, Western; D002460:Cell Line; D003208:Concanavalin A / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D006031:Glycosylation; D006596:Hexosaminidases / Q000378:metabolism; D008297:Male; D008358:Mannose / Q000378:metabolism; D017038:Mannosyl-Glycoprotein Endo-beta-N-Acetylglucosaminidase; D008854:Microscopy, Electron; D008970:Molecular Weight; D009024:Morphogenesis; D015531:Radioimmunoprecipitation Assay; D012401:Rotavirus / Q000254:growth & development* / Q000648:ultrastructure; D013552:Swine; D013737:Testis / Q000382:microbiology* / Q000648:ultrastructure; D014415:Tunicamycin / Q000494:pharmacology; D014759:Viral Envelope Proteins / Q000096:biosynthesis; D017361:Viral Nonstructural Proteins / Q000096:biosynthesis; D015678:Viral Structural Proteins / Q000096:biosynthesis; D014776:Virus Cultivation
chemical_list: D014759:Viral Envelope Proteins; D017361:Viral Nonstructural Proteins; D015678:Viral Structural Proteins; D003208:Concanavalin A; D014415:Tunicamycin; D006596:Hexosaminidases; D017038:Mannosyl-Glycoprotein Endo-beta-N-Acetylglucosaminidase; D008358:Mannose