3JC5

Structure of the eukaryotic replicative CMG helicase and pumpjack motion

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.70 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:  
    3JC5, 3JC6, 3JC7

  • 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 helicase wh ...

    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: 

    Biology Department, Brookhaven National Laboratory, Upton, New York, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM2 2868Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MCM2, YBL023C, YBL0438
EC: 3.6.4.12
Find proteins for P29469 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P29469 
Go to UniProtKB:  P29469
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM3 3971Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MCM3, YEL032W, SYGP-ORF23
EC: 3.6.4.12
Find proteins for P24279 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P24279 
Go to UniProtKB:  P24279
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM4 4933Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MCM4, CDC54, HCD21, YPR019W, YP9531.13
EC: 3.6.4.12
Find proteins for P30665 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P30665 
Go to UniProtKB:  P30665
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Minichromosome maintenance protein 5 5775Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MCM5, CDC46, YLR274W, L9328.1
EC: 3.6.4.12
Find proteins for P29496 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P29496 
Go to UniProtKB:  P29496
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM6 61017Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MCM6, YGL201C
EC: 3.6.4.12
Find proteins for P53091 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P53091 
Go to UniProtKB:  P53091
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM7 7845Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MCM7, CDC47, YBR202W, YBR1441
EC: 3.6.4.12
Find proteins for P38132 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P38132 
Go to UniProtKB:  P38132
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Cell division control protein 45 c650Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: CDC45, SLD4, YLR103C, L8004.11
Find proteins for Q08032 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q08032 
Go to UniProtKB:  Q08032
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication complex GINS protein SLD5 D294Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: SLD5, YDR489W
Find proteins for Q03406 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q03406 
Go to UniProtKB:  Q03406
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication complex GINS protein PSF2 B213Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: PSF2, YJL072C, HRF213, J1086
Find proteins for P40359 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P40359 
Go to UniProtKB:  P40359
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication complex GINS protein PSF1 A208Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: PSF1, YDR013W, PZA208, YD8119.18
Find proteins for Q12488 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q12488 
Go to UniProtKB:  Q12488
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication complex GINS protein PSF3 C194Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: PSF3, YOL146W
Find proteins for Q12146 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q12146 
Go to UniProtKB:  Q12146
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

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