1jp5
From Proteopedia
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Crystal structure of the single-chain Fv fragment 1696 in complex with the epitope peptide corresponding to N-terminus of HIV-1 protease
Overview
BACKGROUND: Since the demonstration that the protease of the human, immunodeficiency virus (HIV Pr) is essential in the viral life cycle, this, enzyme has become one of the primary targets for antiviral drug design., The murine monoclonal antibody 1696 (mAb1696), produced by immunization, with the HIV-1 protease, inhibits the catalytic activity of the enzyme of, both the HIV-1 and HIV-2 isolates with inhibition constants in the low, nanomolar range. The antibody cross-reacts with peptides that include the, N terminus of the enzyme, a region that is highly conserved in sequence, among different viral strains and that, furthermore, is crucial for, homodimerization to the active enzymatic form. RESULTS: We report here the, crystal structure at 2.7 A resolution of a recombinant single-chain Fv, fragment of mAb1696 as a complex with a cross-reactive peptide of the, HIV-1 protease. The antibody-antigen interactions observed in this complex, provide a structural basis for understanding the origin of the broad, reactivity of mAb-1696 for the HIV-1 and HIV-2 proteases and their, respective N-terminal peptides. CONCLUSION: A possible mechanism of, HIV-protease inhibition by mAb1696 is proposed that could help the design, of inhibitors aimed at binding inactive monomeric species.
About this Structure
1JP5 is a Protein complex structure of sequences from Mus musculus. Full crystallographic information is available from OCA.
Reference
Structural basis of HIV-1 and HIV-2 protease inhibition by a monoclonal antibody., Rezacova P, Lescar J, Brynda J, Fabry M, Horejsi M, Sedlacek J, Bentley GA, Structure. 2001 Oct;9(10):887-95. PMID:11591344
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