Abstract
The replication and polypeptide synthesis of Abadina virus, a member of the Palyam serogroup of orbiviruses, was studied. The first virus-specified proteins could be demonstrated 2 to 4 h post-infection (p.i.) by immunoprecipitation. The rate of synthesis increased rapidly until 12 h p.i. after which it remained fairly constant until 18 h p.i. when it began to decline. Host cell protein synthesis shutoff was incomplete. Twelve virus-induced polypeptides were identified in infected cell lysates, ranging in Mr from 36K to 143K. Three small polypeptides (Mr 15K to 20K) identified in homologous immunoprecipitation studies are also thought to be virus-specified. Nine structural proteins were identified, four being major components of the purified virion. Partial proteolysis was used to demonstrate homology between some proteins. Pulse-chase experiments provided no evidence for a precursor-product relationship between any of the Abadina virus proteins. A non-structural protein was found to be phosphorylated.
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