Název:
Structural basis of HIV-1 and HIV-2 protease inhibition bya monoclonal antibody
Autoři:
Řezáčová, Pavlína ; Lescar, J. ; Brynda, Jiří ; Fábry, Milan ; Bentley, G. A. ; Sedláček, Juraj Typ dokumentu: Příspěvky z konference Konference/Akce: Meetingof the Czech and Slovak structural biologist /2./, Nové Hrady (CZ), 2003-03-13 / 2003-03-15
Rok:
2003
Jazyk:
eng
Abstrakt: The murine monoclonal antibody 1696, produced by immunisation with the HIV-1 protease,inhibits the catalytic activity of the enzyme of both the HIV-1 and HIV-2 isolates, with inhibitionconstants in the low nanomolar range. This antibody cross-reacts with peptides that include theN-terminus of the enzyme (residues 1-7), a region which is highly conserved in sequence amongdifferent viral strains and which, furthermore, is crucial for homodimerization to the activeenzymatic form.We report here two crystal structures of a recombinant single-chain Fv fragment of mAb 1696,expressed in E. coli, as a complex with a cross-reactive peptides from the HIV-1 PR and theHIV-2 PR at 2.7 ? resolution and 1.9 ? resolution respectively. On the basis of the interactionsseen in the complex three-dimensional structures, the cross-reactivity between mAb 1696 withthe HIV-1 and HIV-2 protease and their N-terminal peptides can be explained. In addition, acandidate mechanism of HIV PR inhibition by mAb 1696 is proposed which may help thedesign of alternative HIV protease inhibitors, aimed at dissociating the homodimeric viral enzyme.
Klíčová slova:
antibody fragment; crystal structure; HIV protease inhibition Číslo projektu: CEZ:AV0Z5052915 (CEP), GV203/98/K023 (CEP) Poskytovatel projektu: GA ČR Zdrojový dokument: Material Structure in Chemistry, Biology, Physics and Technology, ISSN 1211-5894
Instituce: Ústav molekulární genetiky AV ČR
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Informace o dostupnosti dokumentu:
Dokument je dostupný v příslušném ústavu Akademie věd ČR. Původní záznam: http://hdl.handle.net/11104/0087286