6r4t
Crystal structure of the Pri1 subunit of human primase bound to vidarabine triphosphateCrystal structure of the Pri1 subunit of human primase bound to vidarabine triphosphate
Structural highlights
FunctionPRI1_HUMAN DNA primase is the polymerase that synthesizes small RNA primers for the Okazaki fragments made during discontinuous DNA replication. Publication Abstract from PubMedNucleoside analogues are widely used in clinical practice as chemotherapy drugs. Arabinose nucleoside derivatives such as fludarabine are effective in the treatment of patients with acute and chronic leukemias and non-Hodgkin's lymphomas. Although nucleoside analogues are generally known to function by inhibiting DNA synthesis in rapidly proliferating cells, the identity of their in vivo targets and mechanism of action are often not known in molecular detail. Here we provide a structural basis for arabinose nucleotide-mediated inhibition of human primase, the DNA-dependent RNA polymerase responsible for initiation of DNA synthesis in DNA replication. Our data suggest ways in which the chemical structure of fludarabine could be modified to improve its specificity and affinity toward primase, possibly leading to less toxic and more effective therapeutic agents. Structural Basis for Inhibition of Human Primase by Arabinofuranosyl Nucleoside Analogues Fludarabine and Vidarabine.,Holzer S, Rzechorzek NJ, Short IR, Jenkyn-Bedford M, Pellegrini L, Kilkenny ML ACS Chem Biol. 2019 Sep 20;14(9):1904-1912. doi: 10.1021/acschembio.9b00367. Epub , 2019 Sep 11. PMID:31479243[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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