Japan Agency for Medical Research and Development (AMED)
JP19am0101069
日本
Japan Agency for Medical Research and Development (AMED)
JP21am0101071
日本
引用
ジャーナル: Nucleic Acids Res / 年: 2021 タイトル: DNA polymerase D temporarily connects primase to the CMG-like helicase before interacting with proliferating cell nuclear antigen. 著者: Keisuke Oki / Takeshi Yamagami / Mariko Nagata / Kouta Mayanagi / Tsuyoshi Shirai / Naruhiko Adachi / Tomoyuki Numata / Sonoko Ishino / Yoshizumi Ishino / 要旨: The eukaryotic replisome is comprised of three family-B DNA polymerases (Polα, δ and ϵ). Polα forms a stable complex with primase to synthesize short RNA-DNA primers, which are subsequently ...The eukaryotic replisome is comprised of three family-B DNA polymerases (Polα, δ and ϵ). Polα forms a stable complex with primase to synthesize short RNA-DNA primers, which are subsequently elongated by Polδ and Polϵ in concert with proliferating cell nuclear antigen (PCNA). In some species of archaea, family-D DNA polymerase (PolD) is the only DNA polymerase essential for cell viability, raising the question of how it alone conducts the bulk of DNA synthesis. We used a hyperthermophilic archaeon, Thermococcus kodakarensis, to demonstrate that PolD connects primase to the archaeal replisome before interacting with PCNA. Whereas PolD stably connects primase to GINS, a component of CMG helicase, cryo-EM analysis indicated a highly flexible PolD-primase complex. A conserved hydrophobic motif at the C-terminus of the DP2 subunit of PolD, a PIP (PCNA-Interacting Peptide) motif, was critical for the interaction with primase. The dissociation of primase was induced by DNA-dependent binding of PCNA to PolD. Point mutations in the alternative PIP-motif of DP2 abrogated the molecular switching that converts the archaeal replicase from de novo to processive synthesis mode.
EMPIAR-11061 (タイトル: DNA polymerase D temporarily connects primase to the CMG-like helicase before interacting with proliferating cell nuclear antigen Data size: 1.7 TB Data #1: DNA polymerase D temporarily connects primase to the CMG-like helicase before interacting with proliferating cell nuclear antigen [micrographs - multiframe])