Development of MTH1-Binding Nucleotide Analogs Based on 7,8-Dihalogenated 7-Deaza-dG Derivatives. 2021

Hui Shi, and Ren Ishikawa, and Choon Han Heh, and Shigeki Sasaki, and Yosuke Taniguchi
Graduate School of Pharmaceutical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.

MTH1 is an enzyme that hydrolyzes 8-oxo-dGTP, which is an oxidatively damaged nucleobase, into 8-oxo-dGMP in nucleotide pools to prevent its mis-incorporation into genomic DNA. Selective and potent MTH1-binding molecules have potential as biological tools and drug candidates. We recently developed 8-halogenated 7-deaza-dGTP as an 8-oxo-dGTP mimic and found that it was not hydrolyzed, but inhibited enzyme activity. To further increase MTH1 binding, we herein designed and synthesized 7,8-dihalogenated 7-deaza-dG derivatives. We successfully synthesized multiple derivatives, including substituted nucleosides and nucleotides, using 7-deaza-dG as a starting material. Evaluations of the inhibition of MTH1 activity revealed the strong inhibitory effects on enzyme activity of the 7,8-dihalogenated 7-deaza-dG derivatives, particularly 7,8-dibromo 7-daza-dGTP. Based on the results obtained on kinetic parameters and from computational docking simulating studies, these nucleotide analogs interacted with the active site of MTH1 and competitively inhibited the substrate 8-oxodGTP. Therefore, novel properties of repair enzymes in cells may be elucidated using new compounds.

UI MeSH Term Description Entries
D007700 Kinetics The rate dynamics in chemical or physical systems.
D010744 Phosphoric Monoester Hydrolases A group of hydrolases which catalyze the hydrolysis of monophosphoric esters with the production of one mole of orthophosphate. Phosphatase,Phosphatases,Phosphohydrolase,Phosphohydrolases,Phosphomonoesterase,Phosphomonoesterases,Phosphoric Monoester Hydrolase,Hydrolase, Phosphoric Monoester,Hydrolases, Phosphoric Monoester,Monoester Hydrolase, Phosphoric
D011485 Protein Binding The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments. Plasma Protein Binding Capacity,Binding, Protein
D003848 Deoxyguanine Nucleotides Guanine nucleotides which contain deoxyribose as the sugar moiety. Deoxyguanosine Phosphates,Nucleotides, Deoxyguanine,Phosphates, Deoxyguanosine
D004249 DNA Damage Injuries to DNA that introduce deviations from its normal, intact structure and which may, if left unrepaired, result in a MUTATION or a block of DNA REPLICATION. These deviations may be caused by physical or chemical agents and occur by natural or unnatural, introduced circumstances. They include the introduction of illegitimate bases during replication or by deamination or other modification of bases; the loss of a base from the DNA backbone leaving an abasic site; single-strand breaks; double strand breaks; and intrastrand (PYRIMIDINE DIMERS) or interstrand crosslinking. Damage can often be repaired (DNA REPAIR). If the damage is extensive, it can induce APOPTOSIS. DNA Injury,DNA Lesion,DNA Lesions,Genotoxic Stress,Stress, Genotoxic,Injury, DNA,DNA Injuries
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D006868 Hydrolysis The process of cleaving a chemical compound by the addition of a molecule of water.
D000072756 Protein Conformation, alpha-Helical A secondary structure of proteins that is a right-handed helix or coil, where each amino (N-H) group of the peptide backbone contributes a hydrogen bond to the carbonyl(C alpha-Helical Conformation, Protein,alpha-Helical Protein Conformation,alpha-Helical Structures,alpha-Helices,alpha-Helix,Conformation, Protein alpha-Helical,Conformation, alpha-Helical Protein,Conformations, Protein alpha-Helical,Conformations, alpha-Helical Protein,Protein Conformation, alpha Helical,Protein Conformations, alpha-Helical,alpha Helical Conformation, Protein,alpha Helical Protein Conformation,alpha Helical Structures,alpha Helices,alpha Helix,alpha-Helical Conformations, Protein,alpha-Helical Protein Conformations,alpha-Helical Structure
D000072757 Protein Conformation, beta-Strand A secondary structure of proteins where the amino (N-H) groups of a polypeptide backbone, three to ten amino acids in length, establish hydrogen bonds with the carbonyl (C Protein Conformation, beta-Sheet,beta-Pleated Sheet,beta-Sheet,beta-Sheets,beta-Strand,beta-Stranded Structures,beta-Strands,Conformation, beta-Sheet Protein,Conformation, beta-Strand Protein,Conformations, beta-Sheet Protein,Conformations, beta-Strand Protein,Protein Conformation, beta Sheet,Protein Conformation, beta Strand,Protein Conformations, beta-Sheet,Protein Conformations, beta-Strand,Sheet, beta-Pleated,Sheets, beta-Pleated,beta Pleated Sheet,beta Sheet,beta Sheets,beta Strand,beta Stranded Structures,beta Strands,beta-Pleated Sheets,beta-Sheet Protein Conformation,beta-Sheet Protein Conformations,beta-Strand Protein Conformation,beta-Strand Protein Conformations,beta-Stranded Structure
D001665 Binding Sites The parts of a macromolecule that directly participate in its specific combination with another molecule. Combining Site,Binding Site,Combining Sites,Site, Binding,Site, Combining,Sites, Binding,Sites, Combining

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