Protein Domain Specific Covalent Inhibition of Human DNA Polymerase β.
Protein Domain Specific Covalent Inhibition of Human DNA Polymerase β.
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DOI:
10.1002/cbic.202100247
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发表时间:
2021-08-17
期刊:
影响因子:
--
通讯作者:
Greenberg MM
中科院分区:
文献类型:
--
作者:
Yuhas SC;Majumdar A;Greenberg MM
DNA polymerase β (Pol β) is a frequently overexpressed and/or mutated bifunctional repair enzyme. Pol β possesses polymerase and lyase active sites, that are employed in two steps of base excision repair. Pol β is an attractive therapeutic target for which there is a need for inhibitors. Two mechanistically inspired covalent inhibitors (1, IC50=21.0 μM; 9, IC50=18.7 μM) that modify lysine residues in different Pol β active sites are characterized. Despite modifying lysine residues in different active sites, 1 and 9 inactivate the polymerase and lyase activities of Pol β. Fluorescence anisotropy experiments indicate that they do so by preventing DNA binding. Inhibitors 1 and 9 provide the basis for a general approach to preparing domain selective inhibitors of bifunctional polymerases. Such molecules could prove to be useful tools for studying the role of wild type and mutant forms of Pol β and other polymerases in DNA repair. A single synthesis and screening strategy yields covalent inhibitors that inactivate bifunctional DNA polymerase β by modifying lysine residues in different active site domains and prevent DNA binding.
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