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M9550004.TXT
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1995-03-04
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Document 0004
DOCN M9550004
TI Competitive inhibition of HIV-1 protease by biphenyl carboxylic acids.
DT 9505
AU Tummino PJ; Ferguson D; Jacobs CM; Tait B; Hupe L; Lunney E; Hupe D;
Department of Biochemistry, Parke-Davis Pharmaceutical Research,;
Division of Warner-Lambert Company, Ann Arbor, Michigan 48105.
SO Arch Biochem Biophys. 1995 Jan 10;316(1):523-8. Unique Identifier :
AIDSLINE MED/95142674
AB A novel series of nonpeptidic compounds that contain a biphenyl
carboxylic acid group have been shown to inhibit HIV-1 protease. The
active compounds, most of which are highly soluble, have IC50 values in
the range of 3.4-74 microM. The structure-inhibitory activity
relationship demonstrates the necessity of the biphenyl carboxylic acid
group for inhibition, which is enhanced by the presence of a sulfone
group and by halogenation of an adjacent phenyl group. A double
reciprocal plot of inhibition data on two of the compounds clearly shows
that the inhibition occurs in a competitive manner, with Ki values of
1.1 and 3.4 microM. Inhibition by several of the compounds was found to
be reversible and fast-binding, while one of the biphenyl carboxylic
acids inhibits in a reversible slow-binding manner. Time-dependent
inhibition studies were conducted on this compound, and it was
determined to have the kinetic values of kon = 0.18 microM-1min-1, koff
= 9.7 x 10(-2)min-1, and Ki = 0.14 microM. Thus, the slow-binding
inhibitor is the most potent in the series. Molecular modeling has
provided information on a possible binding mode for two different
biphenyl carboxylic acid inhibitors of HIV-1 protease.
DE Amino Acid Sequence Binding Sites Biphenyl
Compounds/CHEMISTRY/*PHARMACOLOGY Carboxylic
Acids/CHEMISTRY/*PHARMACOLOGY Computer Simulation Drug Design HIV
Protease Inhibitors/CHEMISTRY/CLASSIFICATION/*PHARMACOLOGY
HIV-1/*ENZYMOLOGY Kinetics Models, Molecular Molecular Sequence Data
Recombinant Proteins/DRUG EFFECTS Solubility JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).