Backbone Cyclic Peptide, Which Mimics the Nuclear Localization Signal of Human Immunodeficiency Virus Type 1 Matrix Protein, Inhibits Nuclear Import and Virus Production in Nondividing Cells
- 2 April 1998
- journal article
- Published by American Chemical Society (ACS) in Biochemistry
- Vol. 37 (16), 5616-5622
- https://doi.org/10.1021/bi972878h
Abstract
Here, we describe an application of the backbone cyclic (BC) proteinomimetic approach to the design and the synthesis of a BC peptide which functionally mimics the nuclear localization signal (NLS) region of the human immunodeficiency virus type 1 matrix protein (HIV-1 MA). On the basis of the NMR structure of HIV-1 MA, a library of BC peptides was designed and screened for the ability to inhibit nuclear import of NLS−BSA in digitonin-permeabilized HeLa and Colo-205 cultured cells. The screening yielded a lead compound (IC50 = 3 μM) which was used for the design of a second library. This library led to the discovery of a highly potent BC peptide, designated BCvir, with an IC50 value of 35 nM. This inhibitory potency is compared to a value of 12 μM exhibited by the linear parent HIV-1 MA NLS peptide. BCvir also reduced HIV-1 production by 75% in infected nondividing cultured human T-cells and was relatively resistant to tryptic digestion. These properties make BCvir a potential candidate for the development of a novel class of antiviral drugs which will be based on blocking nuclear import of viral genomes.Keywords
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