title: Genetic relatedness of the genomes of equine herpesvirus types 1, 2, and 3.
abstract: Genomic DNAs of equine herpesvirus type 1 (EHV-1), EHV-2 (equine cytomegalovirus), and EHV-3 were examined by reassociation kinetic and thermal denaturation analyses to determine the extent and degree of homology among the three viral DNAs. Results of reassociation analyses indicated a limited homology among the three EHV genomes. Homologous DNA sequences equivalent to 1.8 to 3.7 megadaltons between EHV-1 and equine cytomegalovirus, 7.6 to 8.2 megadaltons between EHV-1 and EHV-3, and 1.3 to 1.9 megadaltons between equine cytomegalovirus and EHV-3 were detected. Examination by thermal denaturation of the DNA homoduplexes and heteroduplexes formed during reassociation revealed a high degree of base pairing within the duplexes, suggesting that closely related sequences may be conserved among the genomes of EHV.
mesh_terms: D003587:Cytomegalovirus / Q000235:genetics; D004279:DNA, Viral / Q000235:genetics; D006564:Herpesviridae / Q000235:genetics*; D004861:Herpesvirus 1, Equid / Q000235:genetics*; D007700:Kinetics; D009691:Nucleic Acid Denaturation; D009693:Nucleic Acid Hybridization; D010802:Phylogeny; D013696:Temperature
chemical_list: D004279:DNA, Viral