A PRIMATE T-LYMPHOTROPIC VIRUS, PTLV-L, DIFFERENT FROM HUMAN T-LYMPHOTROPIC VIRUSES TYPE-I AND TYPE-II, IN A WILD-CAUGHT BABOON (PAPIO-HAMADRYAS)

被引:92
作者
GOUBAU, P [1 ]
VANBRUSSEL, M [1 ]
VANDAMME, AM [1 ]
LIU, HF [1 ]
DESMYTER, J [1 ]
机构
[1] KATHOLIEKE UNIV LEUVEN HOSP,B-3000 LOUVAIN,BELGIUM
关键词
D O I
10.1073/pnas.91.7.2848
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Searching for clues to the evolution of the primate T-lymphotropic viruses (PTLVs), which include the human and the simian T-lymphotropic viruses (HTLV and STLV), we have identified another PTLV, which differs sufficiently from the known PTLV-I and PTLV-II types to be designated here PTLV-L. The virus was isolated from a wild-born baboon (Papio hamadryas) from Eritrea. In a cDNA library a 1802-bp-long fragment was identified that extends from the env region, including the complete transmembrane protein gene, to part of the tax/rex gene. Homologies at the nucleotide sequence level of PTLV-L, prototype simian T-lymphotropic virus-PH969, with HTLV-I and -II, respectively, were 62% and 64% overall, 65% and 70% in the env region, and 80% and 80% in the partial tax/rex sequence. In the 5' part of the pX region a significant homology was seen only with HTLV-II (52%). Phylogenetic analysis based on the gene encoding the transmembrane protein indicates that PTLV-L represents a PTLV type with a long independent evolution, longer than any strain within the PTLV-I or PTLV-II groups. The finding of another PTLV type in African baboons is further evidence of the wide variety of PTLV found on this continent. Whether PTLV-L resembles PTLV-I and PTLV-II in the extension of its host range to other primates, including humans, remains to be seen.
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页码:2848 / 2852
页数:5
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