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- W2024011663 abstract "DNA synthesis is catalyzed by an ensemble of proteins designated the replicase. The efficient assembly of this multiprotein complex is essential for the continuity of DNA replication and is mediated by clamp-loading accessory proteins that use ATP binding and hydrolysis to coordinate these events. As a consequence, the ability to selectively inhibit the activity of these accessory proteins provides a rational approach to regulate DNA synthesis. Toward this goal, we tested the ability of several non-natural nucleotides to inhibit ATP-dependent enzymes associated with DNA replicase assembly. Kinetic and biophysical studies identified 5-nitro-indolyl-2'-deoxyribose-5'-triphosphate as a unique non-natural nucleotide capable of selectively inhibiting the bacteriophage T4 clamp loader versus the homologous enzyme from Escherichia coli. Modeling studies highlight the structural diversity between the ATP-binding site of each enzyme and provide a mechanism accounting for the differences in potencies for various substituted indolyl-2'-deoxyribose-5'-triphosphates. An in vivo assay measuring plaque formation demonstrates the efficacy and selectivity of 5-nitro-indolyl-2'-deoxyribose as a cytostatic agent against T4 bacteriophage while leaving viability of the E. coli host unaffected. This strategy provides a novel approach to develop agents that selectively inhibit ATP-dependent enzymes that are required for efficient DNA replication." @default.
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- W2024011663 date "2009-12-18" @default.
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- W2024011663 title "Selective Inhibition of DNA Replicase Assembly by a Non-natural Nucleotide: Exploiting the Structural Diversity of ATP-Binding Sites" @default.
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- W2024011663 doi "https://doi.org/10.1021/cb900218c" @default.
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