The endogenous langur type D retrovirus PO-1-Lu and its exogenous counterparts in macaque and langur monkeys

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Abstract

PO-1-Lu, the endogenous type D retrovirus of langurs (Trachypithecus obscurus) has previously been considered a progenitor to the prototype type D retrovirus, Mason Pfizer monkey virus (M-PMV/SRV-3), that became established in macaque monkeys (Macaca spp.) following a zoonosis. This study reevaluates this hypothesis to include other exogenous SRVs. New sequence information from the gp70(SU)-encoding region of PO-1-Lu shows striking similarity to the newly identified exogenous langur retrovirus, SRV-6, recently isolated from the Hanuman Langur (Semnopithecus entellus). An unrooted, bootstrapped neighbor-joining tree derived from env gene nucleotide sequences shows PO-1-Lu and SRV-6 appear more closely related genetically to SRV-2 than SRV-1 or SRV-3 (M-PMV). This is also reflected in our observations that the M-PMV envelope glycoprotein precursor gPr86Env and gp70(SU) were antigenically distinct from PO-1-Lu, although the gp22(TM) glycoproteins were antigenically cross-reactive. The potential that SRV-6 represents an exogenous form of PO-1-Lu that has arisen following a recent zoonosis is discussed. © 2003 Elsevier Inc. All rights reserved.

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Sommerfelt, M. A., Harkestad, N., & Hunter, E. (2003). The endogenous langur type D retrovirus PO-1-Lu and its exogenous counterparts in macaque and langur monkeys. Virology, 315(2), 275–282. https://doi.org/10.1016/S0042-6822(03)00548-8

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