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

Enzymatic properties and sensitivity to inhibitors of human immunodeficiency virus type 1 (HIV-1) reverse transcriptase with Glu-138-->Arg and Tyr-188-->His mutations.

Two mutants of HIV-1 reverse transcriptase (RT), Tyr-188-->His and Glu-138-->Arg have been prepared and their catalytic properties and sensitivities to inhibitors studied. As compared to wild type RT, a reduction in catalytic efficiency and turn over number was observed, especially for the Tyr-188-->His mutant. The non-nucleoside inhibitors nevirapine, L-697,661 and 9-Cl-TIBO caused a mixed type of inhibition of RT (Arg-138) with respect to substrate, and with the exception of a non-competitive inhibition by nevirapine, also a mixed type of inhibition of RT (His-188). Foscarnet (PFA) caused a non-competitive type of inhibition of RT (Arg-138) and a mixed inhibition of RT (His-188). The inhibition by ddG-TP was competitive with both mutant RTs. Inhibition by nevirapine gave IC50 values of 0.15, 0.23 and 0.72 microM; by 9-Cl-TIBO of 0.20, 2.50 and 10.3 microM; by L-697,661 of 0.064, 0.28 and 0.60 microM; by ddGTP of 0.13, 0.14 and 0.02 microM; by PFA of 17.0, 48.0 and 15.0 microM for RT wt, RT (Arg-138) and RT (His-188), respectively.[1]


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