title: Crystal structure of a cross-reaction complex between an anti-HIV-1 protease antibody and an HIV-2 protease peptide.
abstract: The monoclonal antibody 1696, elicited by HIV-1 protease, inhibits the activity of both HIV-1 and HIV-2 proteases with inhibition constants in the low nanomolar range. The antibody cross-reacts with peptides derived from the N-terminal region of both proteases. The crystal structure of the recombinant single-chain Fv fragment of 1696 complexed with an N-terminal peptide from the HIV-2 protease has been determined at 1.88A resolution. Interactions of the peptide with scFv1696 are compared with the previously reported structure of scFv1696 in complex with the corresponding peptide from HIV-1 protease. The origin of cross-reactivity of mAb1696 with HIV proteases is discussed.
authors.affiliation: Department of Recombinant Expression and Structural Biology, Institute of Molecular Genetics, Academy of Sciences of the Czech Republic, Flemingovo nam. 2, 166 37 Prague 6, Czech Republic. rezacova@img.cas.nz
authors.forename: Pavlina
authors.initials: P
authors.lastname: Rezacova
authors.forename: Jiri
authors.initials: J
authors.lastname: Brynda
authors.forename: Julien
authors.initials: J
authors.lastname: Lescar
authors.forename: Milan
authors.initials: M
authors.lastname: Fabry
authors.forename: Magda
authors.initials: M
authors.lastname: Horejsi
authors.forename: Irena
authors.initials: I
authors.lastname: Sieglova
authors.forename: Juraj
authors.initials: J
authors.lastname: Sedlacek
authors.forename: Graham A
authors.initials: GA
authors.lastname: Bentley
mesh_terms: D000595:Amino Acid Sequence; D000911:Antibodies, Monoclonal / Q000737:chemistry*; D016282:Aspartic Acid Endopeptidases / Q000737:chemistry* / Q000235:genetics / Q000276:immunology; D003429:Cross Reactions; D018360:Crystallography, X-Ray; D015483:HIV Antibodies / Q000737:chemistry* / Q000276:immunology; D016333:HIV Protease / Q000276:immunology*; D006801:Humans; D008958:Models, Molecular; D008969:Molecular Sequence Data; D010455:Peptides / Q000737:chemistry* / Q000276:immunology; D011487:Protein Conformation; D016415:Sequence Alignment
chemical_list: D000911:Antibodies, Monoclonal; D015483:HIV Antibodies; D010455:Peptides; D016282:Aspartic Acid Endopeptidases; D016333:HIV Protease; C065184:p16 protease, Human immunodeficiency virus 2