Expression and complex formation of simian virus 40 large T antigen and mouse p53 in insect cells
1988
O'Reilly, D.R. | Miller, L.K.
Recombinant baculoviruses were constructed which express simian virus 40 large T antigen (SVT-Ag) or murine p53 to high levels in infected insect cells. Characterization of the expressed proteins revealed that they display many properties of the corresponding mammalian-derived proteins. Both proteins are of wild-type size, localize to the nucleus, are recognized by several SVT-Ag- or p53-specific monoclonal antibodies, and are phosphorylated in this system. Complexes are formed between baculovirus-derived SVT-Ag and p53 after coinfection of insect cells with both recombinant viruses. After infection of insect cells with either virus individually, each protein can self-associate to form a variety of oligomeric species. Pulse-chase experiments indicated that both SVT-Ag and p53 are highly stable in insect cells, even in the absence of complex formation.
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