title: Isolation of novel herpes simplex virus type 1 derivatives with tandem duplications of DNA sequences encoding immediate-early mRNA-5 and an origin of replication.
abstract: Two naturally occurring variations of herpes simplex virus type 1 (Patton strain) with novel tandem DNA sequence duplications in the S component were isolated, and the DNA was characterized. These variants were identified among a number of plaque isolates by the appearance of new restriction enzyme fragments that hybridized with radiolabeled DNA from the BamHI Z fragment (map coordinates 0.936 to 0.949) located in the unique S region. One isolate, SP26-3, carried a 3.1-kilobase-pair duplication defined by recombination between a site in the BamHI Z fragment and a site near the origin of replication in the inverted repeat sequence of the S component carried by the EcoRI H fragment. The other isolate, SP22-4, carried a 3.5-kilobase-pair duplication defined by a recombination event between a tandem repeat array in the BamHI Z fragment and a site near the amino terminus of the Vmw175 gene in the S-region inverted repeat sequence contained in the EcoRI K fragment. Both duplicated segments contained the entire immediate early mRNA-5 coding region as well as the origin of replication located in the inverted repeat sequence of the S component. The DNA sequence of each duplication joint was determined.
authors.forename: K
authors.initials: K
authors.lastname: Umene
authors.forename: L W
authors.initials: LW
authors.lastname: Enquist
mesh_terms: D001483:Base Sequence; D004261:DNA Replication; D004262:DNA Restriction Enzymes; D004279:DNA, Viral / Q000235:genetics*; D015245:Deoxyribonuclease BamHI; D005814:Genes, Viral; D012333:RNA, Messenger / Q000235:genetics*; D012367:RNA, Viral / Q000235:genetics; D011995:Recombination, Genetic; D012091:Repetitive Sequences, Nucleic Acid; D018139:Simplexvirus / Q000235:genetics* / Q000302:isolation & purification; D014779:Virus Replication
chemical_list: D004279:DNA, Viral; D012333:RNA, Messenger; D012367:RNA, Viral; D004262:DNA Restriction Enzymes; D015245:Deoxyribonuclease BamHI