title: Molecular pathogenesis of equine coital exanthema: restriction endonuclease digestions of EHV-3 DNA and indications of a unique XbaI cleavage site.
abstract: Equine herpesvirus type 3 (EHV-3) DNA, isolated from purified virions of the large-plaque strain, was digested with the restriction endonucleases XbaI, Bg/II, EcoRI, and HindIII. Several lines of evidence indicated that the DNA extracted from purified virions was composed of long (L) and short (S) components and was present as two isomeric forms, P and IS. The evidence included: (i) after electrophoresis on agarose gels, the summed molecular weights of the digestion products exceeded that expected from intact, unit size DNA; (ii) quantitative measurements of radioactivity (molar ratios) indicated 'minor bands' (0.5 M) interspersed among the major (1.0 M) bands; and (iii) a brief digestion with lambda-5'-exonuclease, prior to digestion with restriction endonuclease, resulted in the loss of some submolar and molar ratio bands, indicative of three termini. A preliminary fragment linkage map of the XbaI digestion products revealed EHV-3 DNA to contain only one recognition site in the unique sequence of the S component. From this linkage map, the size of the S component was deduced to be (22.3 +/- 5) X 10(6) molecular weight.
authors.forename: R J
authors.initials: RJ
authors.lastname: Jacob
authors.forename: R
authors.initials: R
authors.lastname: Price
authors.forename: G P
authors.initials: GP
authors.lastname: Allen
mesh_terms: D000818:Animals; D002874:Chromosome Mapping; D004262:DNA Restriction Enzymes; D004279:DNA, Viral / Q000235:genetics*; D006564:Herpesviridae / Q000235:genetics*; D004858:Herpesvirus 3, Equid / Q000235:genetics*; D006734:Horse Diseases / Q000382:microbiology*; D006736:Horses
chemical_list: D004279:DNA, Viral; D004262:DNA Restriction Enzymes