Publikationsdatenbank

Evolutionarily young african Rhinoceros Gammaretroviruses (2023)

Art

Zeitschriftenartikel / wissenschaftlicher Beitrag

Autoren

Tsangaras, Kyriakos

Mayer, Jens

Mirza, Omar

Dayaram, Anisha

Higgins, Damien P.

Bryant, Benn

Campbell-Ward, Michelle

Sangster, Cheryl

Casteriano, Andrea

Höper, Dirk

Beer, Martin

Greenwood, Alex D. (WE 5)

Quelle

Journal of virology : publ. by the American Society for Microbiology

Bandzählung: 97

Heftzählung: 4

Seiten: Artikelnummer: e01932-22

ISSN: 1098-5514

Sprache

Englisch

Verweise

URL (Volltext): https://journals.asm.org/doi/10.1128/jvi.01932-22

DOI: 10.1128/jvi.01932-22

Kontakt

Institut für Virologie

Robert-von-Ostertag-Str. 7-13
14163 Berlin
+49 30 838 51833
virologie@vetmed.fu-berlin.de

Abstract / Zusammenfassung

High-throughput sequences were generated from DNA and cDNA from four Southern white rhinoceros (Ceratotherium simum simum) located in the Taronga Western Plain Zoo in Australia. Virome analysis identified reads that were similar to Mus caroli endogenous gammaretrovirus (McERV). Previous analysis of perissodactyl genomes did not recover gammaretroviruses. Our analysis, including the screening of the updated white rhinoceros (Ceratotherium simum) and black rhinoceros (Diceros bicornis) draft genomes identified high-copy orthologous gammaretroviral ERVs. Screening of Asian rhinoceros, extinct rhinoceros, domestic horse, and tapir genomes did not identify related gammaretroviral sequences in these species. The newly identified proviral sequences were designated SimumERV and DicerosERV for the white and black rhinoceros retroviruses, respectively. Two long terminal repeat (LTR) variants (LTR-A and LTR-B) were identified in the black rhinoceros, with different copy numbers associated with each (n = 101 and 373, respectively). Only the LTR-A lineage (n = 467) was found in the white rhinoceros. The African and Asian rhinoceros lineages diverged approximately 16 million years ago. Divergence age estimation of the identified proviruses suggests that the exogenous retroviral ancestor of the African rhinoceros ERVs colonized their genomes within the last 8 million years, a result consistent with the absence of these gammaretroviruses from Asian rhinoceros and other perissodactyls. The black rhinoceros germ line was colonized by two lineages of closely related retroviruses and white rhinoceros by one. Phylogenetic analysis indicates a close evolutionary relationship with ERVs of rodents including sympatric African rats, suggesting a possible African origin of the identified rhinoceros gammaretroviruses.