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M94A2281.TXT
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1994-10-25
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Document 2281
DOCN M94A2281
TI Structures of cyclic ureas complexed with native and V821 mutant HIV-1
protease.
DT 9412
AU Chang CH; DeLoskey RL; Lam P; Schadt M; Duke J; Weber PC; DuPont Merck
Pharmaceutical Co., Wilmington, DE.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):34 (abstract no. 110A). Unique
Identifier : AIDSLINE ICA10/94370294
AB OBJECTIVE: To utilize the structural information of the inhibitor
binding mode both in native and mutant HIV proteases for the design of
an improved drug. METHODS: The structures of HIV PR complexed with the
molecule below have been determined to 1.8 A. Complexes crystallize in a
hexagonal space group P6(1) (a = b = 62.8A, c = 83.5 A).
Crystallographic refinement by simulated annealing resulted in a final
R-factor in the low 20's. RESULTS: In all 4 structures, the 7-membered
ring binds in a similar fashion. The carbonyl oxygen atom of cyclic urea
replaces the structural water molecule found in many complexes of linear
peptidomimetic inhibitors (Lam et al., Science, 263, 380-384, 1994). The
P1 and P2 groups of the cyclic urea occupy the same pockets as reported
for the linear inhibitors. However, the hydroxyl groups attached to the
ring make different interactions with the catalytic aspartates than
those of the linear inhibitors. These and other differences among the
three structures and that of native and mutant structures will be
discussed in detail. DISCUSSION AND CONCLUSION: These novel nonpeptide
cyclic urea show high affinity and specificity for the enzyme. This is
an excellent example of structure-based drug design, and some of these
compounds are potent, safe, inhibitors of the HIV protease. TABULAR
DATA, SEE ABSTRACT VOLUME.
DE *Drug Design *HIV Protease/GENETICS Molecular Structure Mutation R
Factors *Urea MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).