Variation of Two Primate Lineage-Specific Residues in Human SAMHD1 Confers Resistance to N Terminus-Targeted SIV Vpx Proteins
نویسندگان
چکیده
منابع مشابه
Variation of two primate lineage-specific residues in human SAMHD1 confers resistance to N terminus-targeted SIV Vpx proteins.
Sterile alpha motif and HD domain-containing protein 1 (SAMHD1) restricts human immunodeficiency virus type 1 (HIV-1) infection in myeloid cells but is inactivated by certain classes of simian immunodeficiency virus (SIV) Vpx proteins. Vpx proteins recruit the DCAF1-CRL4 E3 ubiquitin ligase to trigger species-specific SAMHD1 degradation. Determinants of SIV Vpx-mediated primate SAMHD1 degradati...
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SAMHD1 is a host restriction factor that blocks the ability of lentiviruses such as HIV-1 to undergo reverse transcription in myeloid cells and resting T-cells. This restriction is alleviated by expression of the lentiviral accessory proteins Vpx and Vpr (Vpx/Vpr), which target SAMHD1 for proteasome-mediated degradation. However, the precise determinants within SAMHD1 for recognition by Vpx/Vpr...
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The SAMHD1 triphosphohydrolase inhibits HIV-1 infection of myeloid and resting T cells by depleting dNTPs. To overcome SAMHD1, HIV-2 and some SIVs encode either of two lineages of the accessory protein Vpx that bind the SAMHD1 N or C terminus and redirect the host cullin-4 ubiquitin ligase to target SAMHD1 for proteasomal degradation. We present the ternary complex of Vpx from SIV that infects ...
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ژورنال
عنوان ژورنال: Journal of Virology
سال: 2013
ISSN: 0022-538X
DOI: 10.1128/jvi.02866-13