Previous Article | Next Article ![]()
J. Virol., Sep 1996, 5751-5757, Vol 70, No. 9
T Dorfman and HG Gottlinger
Human immunodeficiency virus type 1 (HIV-1) specifically incorporates the
host cell peptidyl-prolyl isomerase cyclophilin A into virions via contacts
with the capsid (CA) domain of the Gag polyprotein Pr55gag. The
immunosuppressant drug cyclosporin A and the nonimmunosuppressive
cyclosporin A analog SDZ NIM 811 bind to cyclophilin A and inhibit its
incorporation into HIV-1 virions. Both drugs inhibit the virion association
of cyclophilin A and the replication of HIV-1 with a similar dose
dependence. In contrast, these compounds are inactive against other primate
lentiviruses which do not incorporate cyclophilin A, such as simian
immunodeficiency virus (SIV). To locate determinants which confer
sensitivity to SDZ NIM 811, we generated chimeric proviruses between HIV-1
and SIVmac. A hybrid SIVmac which has the CA- p2 domain of the Gag
polyprotein replaced by the corresponding domain from HIV-1 replicated in
an established CD4+ cell line and in human but not macaque peripheral blood
mononuclear cells. The transfer of the HIV- 1 CA-p2 domain to SIVmac led to
the efficient incorporation of cyclophilin A, and SDZ NIM 811 effectively
inhibited both the virion association of cyclophilin A and the spread of
the hybrid virus in infected cultures. We conclude that the HIV-1 CA-p2
domain contains determinants which confer the necessity to interact with
cyclophilin A for efficient virus replication. Furthermore, our data show
that the CA- p2 domain can play a crucial role in species tropism.
Copyright © 1996, American Society for Microbiology
The human immunodeficiency virus type 1 capsid p2 domain confers sensitivity to the cyclophilin-binding drug SDZ NIM 811
Division of Human Retrovirology, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA.
This article has been cited by other articles:
| J. Bacteriol. | Mol. Cell. Biol. | Microbiol. Mol. Biol. Rev. |
|---|
| Clin. Vaccine Immunol. | ALL ASM JOURNALS |
|---|