PMID- 9526545 OWN - NLM STAT- MEDLINE DCOM- 19980421 LR - 20200304 IS - 0304-8608 (Print) IS - 0304-8608 (Linking) VI - 141 IP - 12 DP - 1996 TI - Physical and genetic maps of the human herpesvirus 7 strain SB genome. PG - 2387-408 AB - Human herpesvirus 7 (HHV-7) is a close relative of human herpesvirus 6A (HHV-6A) and human herpesvirus 6B (HHV-6B) based on limited biologic and genetic data. In this work we describe physical and genetic maps for HHV-7 strain SB [HHV-7(SB)], which was obtained from the saliva of a healthy adult. The HHV-7(SB) genome length is approximately 144 kb by clamped homogeneous electric field gel electrophoresis and approximately 135 kb by summation of restriction endonuclease fragments. We constructed plasmid clones and PCR amplimers that span the HHV-7 genome, except for the genomic termini, and determined the maps of the restriction endonuclease cleavage sites for BamHI, PstI, and SacI. The HHV-7(SB) genome is composed of a single unique region of approximately 122 kb bounded at each end by a 6 kb direct repeat. Homologs to thirty-five herpesvirus genes were identified. The highest similarity was with the HHV-6 genes, with an average amino acid identity of 50%, followed by the human cytomegalovirus counterpart. The genomic and genetic maps indicated that the HHV-7 and HHV-6 genomes are colinear. There was no sequence variation in a segment of the gene encoding the DNA polymerase-associated factor homolog among six HHV-7 isolates, while the corresponding segment of the HHV-6A and HHV-6B counterparts differed by 4.6%. These data support previous observations that the closest genetic relatives of HHV-7 are betaherpesviruses. FAU - Dominguez, G AU - Dominguez G AD - Centers for Disease Control and Prevention, Atlanta, Georgia, USA. FAU - Black, J B AU - Black JB FAU - Stamey, F R AU - Stamey FR FAU - Inoue, N AU - Inoue N FAU - Pellett, P E AU - Pellett PE LA - eng PT - Journal Article PL - Austria TA - Arch Virol JT - Archives of virology JID - 7506870 RN - 0 (DNA Primers) RN - 0 (DNA, Viral) RN - EC 2.7.7.7 (DNA-Directed DNA Polymerase) SB - IM MH - Amino Acid Sequence MH - Cells, Cultured MH - Cloning, Molecular MH - Cytomegalovirus/genetics MH - DNA Primers MH - DNA, Viral/analysis/*genetics MH - DNA-Directed DNA Polymerase/genetics MH - Electrophoresis, Gel, Pulsed-Field MH - Gene Library MH - Genes, Viral MH - Genome, Viral MH - Herpesvirus 6, Human/genetics MH - Herpesvirus 7, Human/*genetics MH - Humans MH - Molecular Sequence Data MH - Nucleic Acid Hybridization MH - Phylogeny MH - Plasmids MH - Polymerase Chain Reaction MH - Polymorphism, Restriction Fragment Length MH - Repetitive Sequences, Nucleic Acid MH - Sequence Alignment MH - Sequence Analysis, DNA MH - Sequence Homology, Amino Acid EDAT- 1996/01/01 00:00 MHDA- 1998/04/04 00:01 CRDT- 1996/01/01 00:00 PHST- 1996/01/01 00:00 [pubmed] PHST- 1998/04/04 00:01 [medline] PHST- 1996/01/01 00:00 [entrez] AID - 10.1007/BF01718639 [doi] PST - ppublish SO - Arch Virol. 1996;141(12):2387-408. doi: 10.1007/BF01718639.