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• W2093174110 endingPage "4886" @default.
• W2093174110 startingPage "4882" @default.
• W2093174110 abstract "Analysis of the three-dimensional structure of human immunodeficiency virus type 1 (HIV-1) reverse transcriptase (RT) complexed with double-stranded DNA indicates that while many nucleoside-resistance mutations are not at the putative dNTP binding site, several are in positions to interact with the template-primer. Wild-type HIV-1 RT and two nucleoside-resistant variants, Leu74-->Val and Glu89-->Gly, have been analyzed to determine the basis of resistance. The ability of the wild-type enzyme to incorporate, or reject, a 2',3'-dideoxynucleoside triphosphate (ddNTP) is strongly affected by interactions that take place between the enzyme and the extended template strand 3-6 nt beyond the polymerase active site. Inspection of a model of the enzyme with an extended template suggests that this interaction involves the fingers subdomain of the p66 subunit in the vicinity of Leu74. These data provide direct evidence that the fingers subdomain of the p66 subunit of HIV-1 RT interacts with the template strand. The wild-type enzyme is resistant to ddITP if the template extension is 3 nt or less and becomes sensitive only when the template extends more than 3 or 4 nt beyond the end of the primer strand. However, the mutant enzymes are resistant with both short and long template extensions. Taken together with the three-dimensional structure of HIV-1 RT in complex with double-stranded DNA, these data suggest that resistance to the dideoxynucleotide inhibitors results from a repositioning or change in the conformation of the template-primer that alters the ability of the enzyme to select or reject an incoming dNTP." @default.
• W2093174110 created "2016-06-24" @default.
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• W2093174110 date "1994-05-24" @default.
• W2093174110 modified "2023-09-24" @default.
• W2093174110 title "Sensitivity of wild-type human immunodeficiency virus type 1 reverse transcriptase to dideoxynucleotides depends on template length; the sensitivity of drug-resistant mutants does not." @default.
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• W2093174110 doi "https://doi.org/10.1073/pnas.91.11.4882" @default.
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• W2093174110 hasPublicationYear "1994" @default.
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