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Baculovirus AcMNPV causes proteotoxicity in Sf9 cells as revealed by accumulation of ubiquitinated proteins and aggresomes in the course of infection. Inhibition of proteasomes by lactacystin increased markedly the stock of ubiquitinated proteins indicating a primary role of proteasomes in detoxication. The proteasomes were present in Sf9 cells as 26S and 20S complexes whose protease activity did...
Baculoviruses serve as a stress factor that can activate both death-inducing and cytoprotective pathways in infected cells. In this report, induction of heat shock proteins (HSPs) of the 70-kDa family (HSP/HSC70) in Sf-9 cells after infection with AcMNPV was monitored by Western blot analysis. Two-dimensional electrophoresis in polyacrylamide gel revealed changes in the cellular pattern of HSP/HSC70s...
DNA-binding protein (DBP) of Autographa californica multiple nucleopolyhedrovirus (AcMNPV) was expressed as an N-terminal His 6 -tag fusion using a recombinant baculovirus and purified to near homogeneity. Purified DBP formed oligomers that were crosslinked by redox reagents resulting in predominantly protein dimers and tetramers. In gel retardation assays, DBP showed a high affinity for single-stranded...
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