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Journal of Virology, January 2009, p. 1152-1155, Vol. 83, No. 2
0022-538X/09/$08.00+0     doi:10.1128/JVI.01627-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.

Genome Analysis of Small-Ruminant Lentivirus Genotype E: a Caprine Lentivirus with Natural Deletions of the dUTPase Subunit, vpr-Like Accessory Gene, and 70-Base-Pair Repeat of the U3 Region {triangledown}

Ramsés Reina,{dagger} Elena Grego,{dagger} Luigi Bertolotti, Daniele De Meneghi, and Sergio Rosati*

Dipartimento di Produzioni Animali, Epidemiologia ed Ecologia, Università degli Studi di Torino, Grugliasco, Italy

Received 30 July 2008/ Accepted 24 October 2008

The nucleotide sequence of the highly divergent small-ruminant lentivirus genotype E has been determined. The full genome consists of 8,418 nucleotides and lacks two large portions corresponding nearly to the entire dUTPase subunit of the pol and vpr-like accessory genes. Moreover, the 70-bp repeat of the U3 region of the long terminal repeat was observed to be deleted. Interestingly, this lentivirus genotype is able to persist in a local breed population, and retrospective analysis revealed its presence in milk samples collected in 1999. gag sequences obtained from a flock coinfected with the B1 and E genotypes revealed that the evolutionary rates of the two viruses were quite similar. Since a reduced viral load and/or disease progression was observed for viruses with artificially deleted dUTPase and vpr-like genes, it is proposed that this viral cluster be designated a low-pathogenicity caprine lentivirus.


* Corresponding author. Mailing address: Dipartimento di Produzioni Animali, Epidemiologia ed Ecologia, Via Leonardo da Vinci, 44, 10095 Grugliasco (TO), Italy. Phone: 39011 6709187. Fax: 390116709196. E-mail: sergio.rosati{at}unito.it

{triangledown} Published ahead of print on 5 November 2008.

{dagger} Both authors contributed equally to this work.


Journal of Virology, January 2009, p. 1152-1155, Vol. 83, No. 2
0022-538X/09/$08.00+0     doi:10.1128/JVI.01627-08
Copyright © 2009, American Society for Microbiology. All Rights Reserved.