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Journal of Virology, October 2005, p. 13094-13104, Vol. 79, No. 20
0022-538X/05/$08.00+0     doi:10.1128/JVI.79.20.13094-13104.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Complete Nucleotide Sequence of Polyomavirus SA12

Paul Cantalupo,1 Adrienne Doering,1,{dagger} Christopher S. Sullivan,2 Achintya Pal,3 K. W. C. Peden,3 Andrew M. Lewis,3 and James M. Pipas1*

Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania 15260,1 Howard Hughes Medical Institute and Departments of Microbiology and Medicine, G. W. Hooper Foundation, University of California, San Francisco, California 94143,2 Division of Viral Products, Center for Biologics Evaluation and Research, Food and Drug Administration, Bethesda, Maryland 208923

Received 26 May 2005/ Accepted 1 August 2005

The Polyomaviridae have small icosahedral virions that contain a genome of approximately 5,000 bp of circular double-stranded DNA. Polyomaviruses infect hosts ranging from humans to birds, and some members of this family induce tumors in test animals or in their natural hosts. We report the complete nucleotide sequence of simian agent 12 (SA12), whose natural host is thought to be Papio ursinus, the chacma baboon. The 5,230-bp genome has a genetic organization typical of polyomaviruses. Sequences encoding large T antigen, small t antigen, agnoprotein, and the viral capsid proteins VP1, VP2, and VP3 are present in the expected locations. We show that, like its close relative simian virus 40 (SV40), SA12 expresses microRNAs that are encoded by the late DNA strand overlapping the 3' end of large T antigen coding sequences. Based on sequence comparisons, SA12 is most closely related to BK virus (BKV), a human polyomavirus. We have developed a real-time PCR test that distinguishes SA12 from BKV and the other closely related polyomaviruses JC virus and SV40. The close relationship between SA12 and BKV raises the possibility that these viruses circulate between human and baboon hosts.

* Corresponding author. Mailing address: Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260. Phone: (412) 624-4691. Fax: (412) 624-4759. E-mail: pipas{at}pitt.edu.

{dagger} Present address: University of Pennsylvania School of Veterinary Medicine, 3800 Spruce St., Philadelphia, PA 19104.

Journal of Virology, October 2005, p. 13094-13104, Vol. 79, No. 20
0022-538X/05/$08.00+0     doi:10.1128/JVI.79.20.13094-13104.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



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