title: Identification and characterization of a putative origin of DNA replication in the genome of a baculovirus pathogenic for Orgyia pseudotsugata.
abstract: A four-kilobase (kb) region (HindIII-N, map units 7.0-11.3) of the Orgyia pseudotsugata multinucleocapsid nuclear polyhedrosis virus (OpMNPV) genome was found to contain sequences that conferred upon plasmids the ability to undergo infection-dependent replication. The plasmid DNA appeared to be replicated to form high molecular weight multimers. Plasmids with deletions of up to 1.8 kb from either end of the HindIII-N region were replication competent. However, a discrete sequence, contained within the region bracketed by the deletions, capable of specifying replication was not identified. No evidence for sequence homology was found between the OpMNPV HindIII-N region and regions elsewhere in the OpMNPV genome or to putative Autographa californica MNPV (AcMNPV) replication origins. Origin-dependent plasmid replication was shown to require the presence of the OpMNPV DNA polymerase gene. The OpMNPV origin replicated poorly in AcMNPV-infected Spodoptera frugiperda cells and, conversely, a putative AcMNPV origin (hr2) replicated at low levels in OpMNPV-infected Lymantria dispar cells.
authors.affiliation: Department of Agricultural Chemistry, Agricultural & Life Sciences, Oregon State University, Corvallis 97331-7301.
authors.forename: M N
authors.initials: MN
authors.lastname: Pearson
authors.forename: R M
authors.initials: RM
authors.lastname: Bjornson
authors.forename: C
authors.initials: C
authors.lastname: Ahrens
authors.forename: G F
authors.initials: GF
authors.lastname: Rohrmann
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002478:Cells, Cultured; D003001:Cloning, Molecular; D003360:Cosmids; D004261:DNA Replication / Q000235:genetics*; D004279:DNA, Viral / Q000096:biosynthesis / Q000235:genetics*; D004259:DNA-Directed DNA Polymerase / Q000235:genetics; D016679:Genome, Viral; D007313:Insecta / Q000166:cytology / Q000382:microbiology; D008969:Molecular Sequence Data; D017924:Nucleopolyhedroviruses / Q000235:genetics* / Q000254:growth & development; D012091:Repetitive Sequences, Nucleic Acid; D015183:Restriction Mapping; D017422:Sequence Analysis, DNA; D017384:Sequence Deletion; D014162:Transfection
chemical_list: D004279:DNA, Viral; D004259:DNA-Directed DNA Polymerase