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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Inhibition of HIV-1 reverse transcriptase by a quinazolinone and comparison with inhibition by pyridinones. Differences in the rates of inhibitor binding and in synergistic inhibition with nucleoside analogs.

6-Chloro-(4S)-cyclopropyl-3,4-dihydro-4-((2-pyridyl)-ethynyl)quinazol in- 2(1H)-one (L-738,372) is representative of a novel structural class of nonnucleoside inhibitors of human immunodeficiency virus, strain 1 (HIV-1), reverse transcriptase (RT), the quinazolinones. L-738,372 is a reversible inhibitor of HIV-1 RT and is noncompetitive against dTTP with a Ki of 140 nM with poly(rA).oligo(dT) as primer-template. Mixed noncompetitive inhibition by L-738,372 was observed against poly(rC).oligo(dG) as primer-template. This quinazolinone binds to RT at a site that overlaps the binding site of other nonnucleoside inhibitors as evidenced by the ability of L-738,372 to displace bound radiolabeled L-696,229, a member of the pyridinone class of inhibitors of HIV-1 RT, from complexes of RT and primer-template. Inhibition by L-738,372 shows slow binding characteristics in reactions with all of the primer-templates employed. Synergistic inhibition of RT activity was evident in combinations of L-738,372 and any of the nucleoside analogs, azidothymidine triphosphate, dideoxyinosine triphosphate, or dideoxycytosine triphosphate. The azidothymidine-resistant form of RT (D67N, K70R, T215Y, K219Q) is inhibited by L-738,372 with 2-3-fold more potency than is the wild-type RT. Comparison of inhibition by L-738,372 with inhibition by pyridinone inhibitors reveals differences in synergistic inhibition with nucleoside analogs and in the rates of binding of the inhibitors.[1]


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