- EMDB-44356: Cryo-EM structure of S. cerevisiae PolE-core-DNA -
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基本情報
登録情報
データベース: EMDB / ID: EMD-44356
タイトル
Cryo-EM structure of S. cerevisiae PolE-core-DNA
マップデータ
structure of S. cerevisiae PolE-core-DNA
試料
複合体: PolE-core-DNA complex
DNA: Primer DNA
DNA: Template DNA
タンパク質・ペプチド: DNA polymerase epsilon catalytic subunit
リガンド: IRON/SULFUR CLUSTER
キーワード
Pol2 / DNA / REPLICATION / DNA BINDING PROTEIN-DNA complex
機能・相同性
機能・相同性情報
epsilon DNA polymerase complex / 4 iron, 4 sulfur cluster binding / DNA-directed DNA polymerase / DNA-directed DNA polymerase activity / DNA replication / DNA repair / nucleotide binding / DNA binding / zinc ion binding 類似検索 - 分子機能
DNA polymerase epsilon, catalytic subunit A, C-terminal / DNA polymerase epsilon catalytic subunit / Domain of unknown function (DUF1744) / DUF1744 / DNA polymerase family B, thumb domain / DNA-directed DNA polymerase, family B, multifunctional domain / DNA polymerase family B / DNA polymerase family B, exonuclease domain / DNA-directed DNA polymerase, family B, exonuclease domain / DNA polymerase, palm domain superfamily ...DNA polymerase epsilon, catalytic subunit A, C-terminal / DNA polymerase epsilon catalytic subunit / Domain of unknown function (DUF1744) / DUF1744 / DNA polymerase family B, thumb domain / DNA-directed DNA polymerase, family B, multifunctional domain / DNA polymerase family B / DNA polymerase family B, exonuclease domain / DNA-directed DNA polymerase, family B, exonuclease domain / DNA polymerase, palm domain superfamily / DNA polymerase type-B family / DNA-directed DNA polymerase, family B / Ribonuclease H superfamily / Ribonuclease H-like superfamily / DNA/RNA polymerase superfamily 類似検索 - ドメイン・相同性
DNA polymerase epsilon catalytic subunit 類似検索 - 構成要素
生物種
Saccharomyces cerevisiae (パン酵母) / DNA molecule (その他)
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM131754
米国
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)
GM115809
米国
Howard Hughes Medical Institute (HHMI)
M.E.O.
米国
引用
ジャーナル: Science / 年: 2024 タイトル: Mechanism of PCNA loading by Ctf18-RFC for leading-strand DNA synthesis. 著者: Zuanning Yuan / Roxana Georgescu / Nina Y Yao / Olga Yurieva / Michael E O'Donnell / Huilin Li / 要旨: The proliferating cell nuclear antigen (PCNA) clamp encircles DNA to hold DNA polymerases (Pols) to DNA for processivity. The Ctf18-RFC PCNA loader, a replication factor C (RFC) variant, is specific ...The proliferating cell nuclear antigen (PCNA) clamp encircles DNA to hold DNA polymerases (Pols) to DNA for processivity. The Ctf18-RFC PCNA loader, a replication factor C (RFC) variant, is specific to the leading-strand Pol (Polε). We reveal here the underlying mechanism of Ctf18-RFC specificity to Polε using cryo-electron microscopy and biochemical studies. We found that both Ctf18-RFC and Polε contain specific structural features that direct PCNA loading onto DNA. Unlike other clamp loaders, Ctf18-RFC has a disordered ATPase associated with a diverse cellular activities (AAA+) motor that requires Polε to bind and stabilize it for efficient PCNA loading. In addition, Ctf18-RFC can pry prebound Polε off of DNA, then load PCNA onto DNA and transfer the PCNA-DNA back to Polε. These elements in both Ctf18-RFC and Polε provide specificity in loading PCNA onto DNA for Polε.