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• W2025408330 endingPage "406" @default.
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• W2025408330 abstract "The use of L(-)SddC [beta-L-2',3'-dideoxy-3'-thiacytidine (lamivudine, 3TC)] for the treatment of Herpes B virus (HBV) infection is hindered by the emergence of drug-resistance associated with the L526M, L550V, and L526M/M550V mutations of the viral DNA polymerase (DP). The interactions of the anti-HBV compounds 2',3'-dideoxy-2',3'-didehydro-beta-L(-)-5-fluorode-oxycytidine and 2'-fluoro-5-methyl-beta-L-arabinofuranosyluracil triphosphate with HBV DP and its L(-)SddC-associated mutants have not been studied. The e antigen-negative variant of HBV associated with the G1896A mutation in the precore region has a high prevalence. Its effect on HBV DP is unclear. Because HBV DNA synthesis occurs in the nucleocapsid, we examined the kinetics of the reverse transcriptase activity from wild-type (wt) and mutated DPs with the wt or G1896A-mutated RNA template in the nucleocapsid. The effects of this template mutation on the activities of these L-nucleoside triphosphates were also examined. Results indicated that these DP mutations increased the Km values of deoxy-NTPs and decreased the efficiencies (Vmax/Km) of DPs. The additional L526M mutation increased the efficiency of the M550V-mutated DP but no more than that of the L526M-mutated DP. The G1896A mutation had impacts on the interactions between different DPs and deoxy-NTPs, except dCTP. It also had different impacts on the actions of the L-nucleoside triphosphates toward DPs. The L526M and M550V mutations caused a greater decrease in the Vmax using the wt RNA template compared with the G1896A-mutated template. The L526M, M550V, and L526M/M550V mutations caused varying degrees of resistance to the different M-nucleoside triphosphates." @default.
• W2025408330 created "2016-06-24" @default.
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• W2025408330 date "2004-01-22" @default.
• W2025408330 modified "2023-09-27" @default.
• W2025408330 title "Reverse Transcriptase Activity of Hepatitis B Virus (HBV) DNA Polymerase within Core Capsid: Interaction with Deoxynucleoside Triphosphates and Anti-HBV l-Deoxynucleoside Analog Triphosphates" @default.
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• W2025408330 doi "https://doi.org/10.1124/mol.65.2.400" @default.
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