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Title: The architecture of a eukaryotic replisome

Journal Article · · Nature Structural & Molecular Biology
DOI:https://doi.org/10.1038/nsmb.3113· OSTI ID:1257963
 [1];  [1];  [2];  [2];  [2];  [1];  [2]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., Stony Brook, NY (United States)
  2. Rockefeller Univ., New York, NY (United States)

At the eukaryotic DNA replication fork, it is widely believed that the Cdc45–Mcm2–7–GINS (CMG) helicase is positioned in front to unwind DNA and that DNA polymerases trail behind the helicase. Here we used single-particle EM to directly image a Saccharomyces cerevisiae replisome. Contrary to expectations, the leading strand Pol ε is positioned ahead of CMG helicase, whereas Ctf4 and the lagging-strand polymerase (Pol) α–primase are behind the helicase. This unexpected architecture indicates that the leading-strand DNA travels a long distance before reaching Pol ε, first threading through the Mcm2–7 ring and then making a U-turn at the bottom and reaching Pol ε at the top of CMG. Lastly, our work reveals an unexpected configuration of the eukaryotic replisome, suggests possible reasons for this architecture and provides a basis for further structural and biochemical replisome studies.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC00112704
OSTI ID:
1257963
Report Number(s):
BNL-112308-2016-JA
Journal Information:
Nature Structural & Molecular Biology, Vol. 22, Issue 12; ISSN 1545-9993
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 130 works
Citation information provided by
Web of Science

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Cited By (57)

DNA replication protein Cdc45 directly interacts with PCNA via its PIP box in Leishmania donovani and the Cdc45 PIP box is essential for cell survival posted_content November 2019
The eukaryotic CMG helicase pumpjack and integration into the replisome journal March 2016
The Human Replicative Helicase, the CMG Complex, as a Target for Anti-cancer Therapy journal March 2018
Ctf4 organizes sister replisomes and Pol α into a replication factory preprint August 2019
The Eukaryotic CMG Helicase at the Replication Fork: Emerging Architecture Reveals an Unexpected Mechanism journal February 2018
Nuclear Pore Complexes: Global Conservation and Local Variation journal June 2018
Mcm10 regulates DNA replication elongation by stimulating the CMG replicative helicase journal February 2017
Cryo-EM Structure of the Fork Protection Complex Bound to CMG at a Replication Fork journal June 2020
Tunability of DNA polymerase stability during eukaryotic DNA replication posted_content June 2019
POLE3-POLE4 Is a Histone H3-H4 Chaperone that Maintains Chromatin Integrity during DNA Replication journal October 2018
DNA unwinding mechanism of a eukaryotic replicative CMG helicase journal February 2020
From structure to mechanism—understanding initiation of DNA replication journal June 2017
Cryo-EM structures of the eukaryotic replicative helicase bound to a translocation substrate journal February 2016
Initiation-specific alleles of the Cdc45 helicase-activating protein journal March 2019
Integrative Structure and Functional Anatomy of a Nuclear Pore Complex journal August 2018
Dynamic structural insights into the molecular mechanism of DNA unwinding by the bacteriophage T7 helicase journal February 2020
MCMs in Cancer: Prognostic Potential and Mechanisms journal February 2020
Tunability of DNA Polymerase Stability during Eukaryotic DNA Replication journal January 2020
The mechanism of eukaryotic CMG helicase activation journal February 2018
DNA replication through a chromatin environment journal August 2017
Acute hydroxyurea-induced replication blockade results in replisome components disengagement from nascent DNA without causing fork collapse journal July 2019
Cryo-EM structures of the eukaryotic replicative helicase bound to a translocation substrate text January 2016
Structure of eukaryotic CMG helicase at a replication fork and implications to replisome architecture and origin initiation journal January 2017
Eukaryotic Replicative Helicase Subunit Interaction with DNA and Its Role in DNA Replication journal April 2017
The human papillomavirus DNA helicase E1 binds, stimulates, and confers processivity to cellular DNA polymerase epsilon journal November 2017
Molecular basis for ATP-hydrolysis-driven DNA translocation by the CMG helicase of the eukaryotic replisome. text January 2020
Elaborated Action of the Human Primosome journal February 2017
DNA looping mediates nucleosome transfer journal November 2016
When proteins play tag: the dynamic nature of the replisome journal July 2019
Chromosome Duplication in Saccharomyces cerevisiae journal July 2016
Integrative structure and functional anatomy of a nuclear pore complex journal March 2018
The ring-shaped hexameric helicases that function at DNA replication forks journal January 2018
Fundamental Characteristics of AAA+ Protein Family Structure and Function journal January 2016
Origin DNA Melting—An Essential Process with Divergent Mechanisms journal January 2017
Emerging Roles for Ciz1 in Cell Cycle Regulation and as a Driver of Tumorigenesis journal December 2016
Arranging eukaryotic nuclear DNA polymerases for replication: Specific interactions with accessory proteins arrange Pols α, δ, and ϵ in the replisome for leading-strand and lagging-strand DNA replication journal July 2017
Possible function of the second RecJ-like protein in stalled replication fork repair by interacting with Hef journal December 2017
The Cdc45/RecJ-like protein forms a complex with GINS and MCM, and is important for DNA replication in Thermococcus kodakarensis journal August 2017
Action of CMG with strand-specific DNA blocks supports an internal unwinding mode for the eukaryotic replicative helicase journal March 2017
Centromere Stability: The Replication Connection journal January 2017
Structural Mechanisms of Hexameric Helicase Loading, Assembly, and Unwinding journal January 2016
The absence of the catalytic domains of Saccharomyces cerevisiae DNA polymerase ϵ strongly reduces DNA replication fidelity journal January 2019
Architecture of Pol II(G) and molecular mechanism of transcription regulation by Gdown1 journal September 2018
Replisome‐Cohesin Interfacing: A Molecular Perspective journal August 2018
Crystal structure of the human Polϵ B-subunit in complex with the C-terminal domain of the catalytic subunit journal July 2017
Structures and operating principles of the replisome journal January 2019
Acute Hydroxyurea-Induced Replication Blockade Results in Replisome Components Disengagement from Nascent DNA Without Causing Fork Collapse journal January 2018
Cortical Development and Brain Malformations: Insights From the Differential Regulation of Early Events of DNA Replication journal March 2019
Characterization of the dimeric CMG/pre-initiation complex and its transition into DNA replication forks journal November 2019
Structure of DNA-CMG-Pol epsilon elucidates the roles of the non-catalytic polymerase modules in the eukaryotic replisome journal November 2018
Histone chaperone networks shaping chromatin function journal January 2017
Quality control mechanisms exclude incorrect polymerases from the eukaryotic replication fork journal January 2017
Cryo-EM structure of the replisome reveals multiple interactions coordinating DNA synthesis journal February 2017
DNA replication protein Cdc45 directly interacts with PCNA via its PIP box in Leishmania donovani and the Cdc45 PIP box is essential for cell survival journal May 2020
Recent advances in cohesin biology journal August 2016
Reconstitution of a eukaryotic replisome reveals the mechanism of asymmetric distribution of DNA polymerases journal July 2016
CMG–Pol epsilon dynamics suggests a mechanism for the establishment of leading-strand synthesis in the eukaryotic replisome journal April 2017

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