Abstract
Bone marrow stromal cell antigen 2 (BST-2) inhibits the release of HIV-1 and other enveloped viruses from the cell surface. HIV-1 Vpu binds to BST-2 through an interaction between transmembrane domains (TMD) of the two proteins and induces the downregulation of cell surface BST-2, thereby counteracting its antiviral activity. In this study, we designed and prepared a modified peptide BST2-TM-P1, which include the sequence of BST-2 TMD, keeping its property competing with BST-2 to bind with Vpu. Biological assay results indicate BST2-TM-P1 could increase the BST-2 level at the cell surface in Vpu dependent manner and significantly inhibit the replication of HIV-1 virion. Our studies indicate that blocking the interaction of Vpu and BST-2 is an effective way to combat HIV-1 infection.
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