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1994-08-20
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Document 0624
DOCN M9480624
TI X-ray crystallographic studies of a series of penicillin-derived
asymmetric inhibitors of HIV-1 protease.
DT 9410
AU Jhoti H; Singh OM; Weir MP; Cooke R; Murray-Rust P; Wonacott A;
Department of Biomolecular Structure, Glaxo Research &; Development
Limited, Greenford, Middlesex, England.
SO Biochemistry. 1994 Jul 19;33(28):8417-27. Unique Identifier : AIDSLINE
MED/94304855
AB In the development of a treatment for AIDS, the HIV-1 protease has been
identified as a good target enzyme for inhibitor design. We previously
reported a series of dimeric penicillin-derived C2-symmetric HIV-1
protease inhibitors [Humber, D., et al. (1993) J. Med. Chem. 36,
3120-3128]. In an attempt to reduce the size and optimize the binding of
these C2-symmetric inhibitors, molecular modeling studies led to a novel
series of monomeric penicillin-derived inhibitors of HIV-1 protease. The
binding modes of these monomeric inhibitors have been characterized by
X-ray crystallographic and NMR studies. Crystal structures of HIV-1
protease complexed to three inhibitors (GR123976, GR126045, and
GR137615) from this series identify the molecular details of the
interactions. The binding of GR123976 (IC50 = 2.3 microM) exhibits good
hydrophobic contacts but few electrostatic interactions. A strategy of
structure-based design and chemical synthesis led to the elaboration of
GR123976 to optimize interactions with the protein. Crystallographic
analysis of HIV-1 protease complexed to GR126045 and GR137615 identified
these interactions with the catalytic aspartates and the protein binding
pockets. The crystal structures of the three complexes confirm the
presence of the major interactions modeled in order to optimize potency
and reveal details of the molecular recognition by HIV-1 protease of
this novel series of nonpeptidic inhibitors.
DE Amino Acid Sequence Aspartic Acid/CHEMISTRY Binding Sites Chemistry,
Physical Computer Simulation Crystallization *Crystallography, X-Ray
Electrochemistry Fluorescent Dyes Hydrogen Bonding HIV
Protease/METABOLISM HIV Protease Inhibitors/*CHEMISTRY/METABOLISM
HIV-1/*ENZYMOLOGY Models, Molecular Molecular Sequence Data Nuclear
Magnetic Resonance Penicillins/*CHEMISTRY/METABOLISM Protein
Conformation JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).