Studies of the silencing of baculovirus DNA binding protein.
Baculovirus DNA binding protein (DBP) binds preferentially single-stranded DNA in vitro and colocalizes with viral DNA replication sites. Here, its putative role as viral replication factor has been addressed by RNA interference. Silencing of DBP in Autographa californica multiple nucleopolyhedrovirus-infected cells increased expression of LEF-3, LEF-4, and P35. In contrast, expression of the structural genes coding for P39 and polyhedrin was suppressed while expression of genes coding for P10 and GP64 was unaffected. In the absence of DBP, viral DNA replication sites were formed, indicating replication of viral DNA. Electron microscopy studies, however, revealed a loss of formation of polyhedra and virus envelopment, suggesting that the primary role of DBP is viral formation rather than viral DNA replication.
Quadt
Ilja
I
Department of Neurology and Center for Biochemistry, Joseph-Stelzmann-Strasse 52, D-50931 Köln, Germany.
van Lent
Jan W M
JW
Knebel-Mörsdorf
Dagmar
D
D000818:Animals; D016367:Baculoviridae / Q000378:metabolism*; D002460:Cell Line; D004261:DNA Replication / Q000502:physiology; D004279:DNA, Viral / Q000037:antagonists & inhibitors / Q000096:biosynthesis*; D004268:DNA-Binding Proteins / Q000037:antagonists & inhibitors* / Q000235:genetics* / Q000502:physiology; D020868:Gene Silencing; D014779:Virus Replication / Q000502:physiology
D004279:DNA, Viral; D004268:DNA-Binding Proteins