PMID- 27170009 OWN - NLM STAT- MEDLINE DCOM- 20170509 LR - 20191209 IS - 1465-2099 (Electronic) IS - 0022-1317 (Linking) VI - 97 IP - 8 DP - 2016 Aug TI - The putative U94 integrase is dispensable for human herpesvirus 6 (HHV-6) chromosomal integration. PG - 1899-1903 LID - 10.1099/jgv.0.000502 [doi] AB - Human herpesvirus 6 (HHV-6) can integrate its genome into the telomeres of host chromosomes and is present in the germline of about 1 % of the human population. HHV-6 encodes a putative integrase U94 that possesses all molecular functions required for recombination including DNA-binding, ATPase, helicase and nuclease activity, and was hypothesized by many researchers to facilitate integration ever since the discovery of HHV-6 integration. However, analysis of U94 in the virus context has been hampered by the lack of reverse-genetic systems and efficient integration assays. Here, we addressed the role of U94 and the cellular recombinase Rad51 in HHV-6 integration. Surprisingly, we could demonstrate that HHV-6 efficiently integrated in the absence of U94 using a new quantitative integration assay. Additional inhibition of the cellular recombinase Rad51 had only a minor impact on virus integration. Our results shed light on this complex integration mechanism that includes factors beyond U94 and Rad51. FAU - Wallaschek, Nina AU - Wallaschek N AD - Institut fur Virologie, Freie Universitat Berlin, Robert von Ostertag-Strasse 7-13, 14163 Berlin, Germany. FAU - Gravel, Annie AU - Gravel A AD - Division of Infectious Disease and Immunity, CHU de Quebec Research Center, Quebec city, Quebec G1V 4G2, Canada. FAU - Flamand, Louis AU - Flamand L AD - Division of Infectious Disease and Immunity, CHU de Quebec Research Center, Quebec city, Quebec G1V 4G2, Canada. AD - Department of Microbiology, Infectious Disease and Immunology, Faculty of Medicine, Universite Laval, Quebec city, Quebec, G1V 0A6, Canada. FAU - Kaufer, Benedikt B AU - Kaufer BB AD - Institut fur Virologie, Freie Universitat Berlin, Robert von Ostertag-Strasse 7-13, 14163 Berlin, Germany. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160511 PL - England TA - J Gen Virol JT - The Journal of general virology JID - 0077340 RN - 0 (DNA-Binding Proteins) RN - 0 (Viral Proteins) RN - EC 2.7.7.- (Integrases) RN - EC 2.7.7.- (RAD51 protein, human) RN - EC 2.7.7.- (Rad51 Recombinase) SB - IM MH - Cell Line MH - DNA-Binding Proteins/genetics/*metabolism MH - Herpesvirus 6, Human/genetics/*physiology MH - Humans MH - Integrases/genetics/*metabolism MH - Rad51 Recombinase/metabolism MH - Viral Proteins/genetics/*metabolism MH - *Virus Integration EDAT- 2016/05/14 06:00 MHDA- 2017/05/10 06:00 CRDT- 2016/05/13 06:00 PHST- 2016/05/13 06:00 [entrez] PHST- 2016/05/14 06:00 [pubmed] PHST- 2017/05/10 06:00 [medline] AID - 10.1099/jgv.0.000502 [doi] PST - ppublish SO - J Gen Virol. 2016 Aug;97(8):1899-1903. doi: 10.1099/jgv.0.000502. Epub 2016 May 11.