3JC7

Structure of the eukaryotic replicative CMG helicase and pumpjack motion


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.8 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Structure of the eukaryotic replicative CMG helicase suggests a pumpjack motion for translocation.

Yuan, Z.Bai, L.Sun, J.Georgescu, R.Liu, J.O'Donnell, M.E.Li, H.

(2016) Nat.Struct.Mol.Biol. 23: 217-224

  • DOI: 10.1038/nsmb.3170
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The CMG helicase is composed of Cdc45, Mcm2-7 and GINS. Here we report the structure of the Saccharomyces cerevisiae CMG, determined by cryo-EM at a resolution of 3.7-4.8 Å. The structure reveals that GINS and Cdc45 scaffold the N tier of the helicas ...

    The CMG helicase is composed of Cdc45, Mcm2-7 and GINS. Here we report the structure of the Saccharomyces cerevisiae CMG, determined by cryo-EM at a resolution of 3.7-4.8 Å. The structure reveals that GINS and Cdc45 scaffold the N tier of the helicase while enabling motion of the AAA+ C tier. CMG exists in two alternating conformations, compact and extended, thus suggesting that the helicase moves like an inchworm. The N-terminal regions of Mcm2-7, braced by Cdc45-GINS, form a rigid platform upon which the AAA+ C domains make longitudinal motions, nodding up and down like an oil-rig pumpjack attached to a stable platform. The Mcm ring is remodeled in CMG relative to the inactive Mcm2-7 double hexamer. The Mcm5 winged-helix domain is inserted into the central channel, thus blocking entry of double-stranded DNA and supporting a steric-exclusion DNA-unwinding model.


    Organizational Affiliation

    Department of Biochemistry &Cell Biology, Stony Brook University, Stony Brook, New York, USA.,Howard Hughes Medical Institute, Rockefeller University, New York, New York, USA.,DNA Replication Laboratory, Rockefeller University, New York, New York, USA.,Department of Pathology and Laboratory Medicine, University of Texas Medical School at Houston, Houston, Texas, USA.,Biology Department, Brookhaven National Laboratory, Upton, New York, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA replication licensing factor MCM2
2
868Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: MCM2
EC: 3.6.4.12
Find proteins for P29469 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: MCM2
Go to UniProtKB:  P29469
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
DNA replication licensing factor MCM3
3
971Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: MCM3
EC: 3.6.4.12
Find proteins for P24279 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: MCM3
Go to UniProtKB:  P24279
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
DNA replication licensing factor MCM4
4
933Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: MCM4 (CDC54, HCD21)
EC: 3.6.4.12
Find proteins for P30665 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: MCM4
Go to UniProtKB:  P30665
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Minichromosome maintenance protein 5
5
775Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: MCM5 (CDC46)
EC: 3.6.4.12
Find proteins for P29496 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: MCM5
Go to UniProtKB:  P29496
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
DNA replication licensing factor MCM6
6
1017Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: MCM6
EC: 3.6.4.12
Find proteins for P53091 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: MCM6
Go to UniProtKB:  P53091
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
DNA replication licensing factor MCM7
7
845Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: MCM7 (CDC47)
EC: 3.6.4.12
Find proteins for P38132 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: MCM7
Go to UniProtKB:  P38132
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
Cell division control protein 45
c
650Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: CDC45 (SLD4)
Find proteins for Q08032 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to Gene View: CDC45
Go to UniProtKB:  Q08032
Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
DNA replication complex GINS protein SLD5
D
294Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: SLD5
Find proteins for Q03406 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q03406
Entity ID: 9
MoleculeChainsSequence LengthOrganismDetails
DNA replication complex GINS protein PSF2
B
213Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: PSF2
Find proteins for P40359 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P40359
Entity ID: 10
MoleculeChainsSequence LengthOrganismDetails
DNA replication complex GINS protein PSF1
A
208Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: PSF1
Find proteins for Q12488 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q12488
Entity ID: 11
MoleculeChainsSequence LengthOrganismDetails
DNA replication complex GINS protein PSF3
C
194Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: PSF3
Find proteins for Q12146 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q12146
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
7
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.8 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-02-10
    Type: Initial release
  • Version 1.1: 2016-02-24
    Type: Database references
  • Version 1.2: 2016-03-16
    Type: Database references
  • Version 1.3: 2018-01-24
    Type: Data processing, Structure summary
  • Version 1.4: 2018-07-18
    Type: Data collection