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Journal of Virology, August 1999, p. 7021-7026, Vol. 73, No. 8
0022-538X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Novel Endogenous Type C Retrovirus in Baboons: Complete Sequence, Providing Evidence for Baboon Endogenous Virus gag-pol Ancestry

Rui Mang,1,* Jaap Goudsmit,1,2 and Antoinette C. van der Kuyl1,2

Department of Human Retrovirology, Academic Medical Center, University of Amsterdam, 1105 AZ Amsterdam,1 and Amsterdam Institute of Viral Genomics, Amsterdam,2 The Netherlands

Received 22 February 1999/Accepted 27 April 1999

A complete endogenous type C viral genome has been isolated from a baboon genomic library. The provirus, Papio cynocephalus endogenous retrovirus (PcEV), is 8,572 nucleotides long, and 38 to 59 proviral copies per baboon genome are found. The PcEV provirus possesses the typical simple retroviral gene organization, including two long terminal repeats and genes encoding gag, pol, and env proteins. The open reading frames for gag-pol and env are complete but have premature stop codons or frameshift mutations. The primer binding site of PcEV is complementary to tRNAGly. The gag and pol genes of PcEV are closely related to those of the baboon endogenous virus (BaEV). The env coding region of PcEV is related to the env genes of type C retroviruses. This suggests that PcEV is one of the ancestors of BaEV contributing the type C gag-pol genome fragment to the type C/D recombinant virus BaEV. Earlier it was shown that another endogenous type D virus (simian endogenous retrovirus) provided the env gene for BaEV (A. C. van der Kuyl et al., J. Virol. 71:3666-3676, 1997).

* Corresponding author. Mailing address: Department of Human Retrovirology, Academic Medical Center, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands. Phone: 31-2-0-5664522. Fax: 31-20-6916531. E-mail: r.mang{at}amc.uva.nl.

Journal of Virology, August 1999, p. 7021-7026, Vol. 73, No. 8
0022-538X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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