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Kusakin AV, Goleva OV, Danilov LG, Krylov AV, Tsay VV, Kalinin RS, Tian NS, Eismont YA, Mukomolova AL, Chukhlovin AB, Komissarov AS, Glotov OS. The Telomeric Repeats of HHV-6A Do Not Determine the Chromosome into Which the Virus Is Integrated. Genes (Basel) 2023; 14:521. [PMID: 36833448 PMCID: PMC9957103 DOI: 10.3390/genes14020521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 02/10/2023] [Accepted: 02/13/2023] [Indexed: 02/22/2023] Open
Abstract
Human herpes virus 6A (HHV-6A) is able to integrate into the telomeric and subtelomeric regions of human chromosomes representing chromosomally integrated HHV-6A (ciHHV-6A). The integration starts from the right direct repeat (DRR) region. It has been shown experimentally that perfect telomeric repeats (pTMR) in the DRR region are required for the integration, while the absence of the imperfect telomeric repeats (impTMR) only slightly reduces the frequency of HHV-6 integration cases. The aim of this study was to determine whether telomeric repeats within DRR may define the chromosome into which the HHV-6A integrates. We analysed 66 HHV-6A genomes obtained from public databases. Insertion and deletion patterns of DRR regions were examined. We also compared TMR within the herpes virus DRR and human chromosome sequences retrieved from the Telomere-to-Telomere consortium. Our results show that telomeric repeats in DRR in circulating and ciHHV-6A have an affinity for all human chromosomes studied and thus do not define a chromosome for integration.
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Affiliation(s)
- Aleksey V. Kusakin
- Pediatric Research and Clinical Center for Infectious Diseases, 197022 St. Petersburg, Russia
- SCAMT Institute, ITMO University, 191002 St. Petersburg, Russia
| | - Olga V. Goleva
- Pediatric Research and Clinical Center for Infectious Diseases, 197022 St. Petersburg, Russia
| | - Lavrentii G. Danilov
- Department of Genetics and Biotechnology, Saint-Petersburg State University, Universitetskaya Nab. 7/9, 199034 St. Petersburg, Russia
| | - Andrey V. Krylov
- Pediatric Research and Clinical Center for Infectious Diseases, 197022 St. Petersburg, Russia
| | - Victoria V. Tsay
- Pediatric Research and Clinical Center for Infectious Diseases, 197022 St. Petersburg, Russia
| | - Roman S. Kalinin
- Pediatric Research and Clinical Center for Infectious Diseases, 197022 St. Petersburg, Russia
| | - Natalia S. Tian
- Pediatric Research and Clinical Center for Infectious Diseases, 197022 St. Petersburg, Russia
| | - Yuri A. Eismont
- Pediatric Research and Clinical Center for Infectious Diseases, 197022 St. Petersburg, Russia
| | - Anna L. Mukomolova
- Pediatric Research and Clinical Center for Infectious Diseases, 197022 St. Petersburg, Russia
| | - Alexei B. Chukhlovin
- Pediatric Research and Clinical Center for Infectious Diseases, 197022 St. Petersburg, Russia
- R.M.Gorbacheva Memorial Institute of Oncology, Hematology and Transplantation, Pavlov First Saint Petersburg State Medical University, 197022 St. Petersburg, Russia
| | | | - Oleg S. Glotov
- Pediatric Research and Clinical Center for Infectious Diseases, 197022 St. Petersburg, Russia
- D.O. Ott Research Institute of Obstetrics, Gynaecology, and Reproductology, 199034 St. Petersburg, Russia
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