RNA synthesis of vesicular stomatitis virus-infected cells: in vivo regulation of replication.

AUTOR(ES)

Simonsen, C C

RESUMO

Pulse-labeling of vesicular stomatitis virus-infected HeLa and BHK cells with [3H]uridine throughout the infectious cycle demonstrated two peaks of uridine incorporation into virus-specific RNA molecules. By separating total RNA synthesis into replication and transcription products, we showed that replication occurs over a shorter period of time in one peak synthesis. The biphasic nature of uridine incorporation is in part due to a general membrane phenomenon of reduced metabolite transport during vesicular stomatis virus infection and in part due to the apparent uncoupling of replication and transcription. A change in the ratio of newly synthesized plus and minus strands of the genome length (42S) RNA was found as the infection proceeded. Early in the infection, plus-stranded 42S RNA comprised 40% of the total genome length RNA synthesis, whereas late in infection, only 15 to 20% of the 42S RNA synthesized was complementary to the virion minus strand. Our data suggest that the rate of synthesis of plus-stranded 42S RNA was constant throughout the infection. The rate of virus release was determined by monitoring the uptake of [3H]uridine into released virus particles. Virus maturation and release are closely associated with the assembly of 42S RNA-containing nucleocapsids.

Documentos Relacionados

• Replicative RNA synthesis and nucleocapsid assembly in vesicular stomatitis virus-infected permeable cells.
• Effect of ribavirin on macromolecular synthesis in vesicular stomatitis virus-infected cells.
• Interaction of mRNA with proteins in vesicular stomatitis virus-infected cells.
• Vesicular stomatitis virus in Drosophila melanogaster cells: regulation of viral transcription and replication.
• Delayed formation of defective interfering particles in vesicular stomatitis virus-infected cells: kinetic studies of viral protein and RNA synthesis during autointerference.