6F0L

S. cerevisiae MCM double hexamer bound to duplex DNA

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.77 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

Cryo-EM structure of a licensed DNA replication origin.

Abid Ali, F., Douglas, M.E., Locke, J., Pye, V.E., Nans, A., Diffley, J.F.X., Costa, A.

(2017) Nat Commun 8: 2241-2241

  • DOI: 10.1038/s41467-017-02389-0

  • PubMed Abstract: 

    • Eukaryotic origins of replication are licensed upon loading of the MCM helicase motor onto DNA. ATP hydrolysis by MCM is required for loading and the post-catalytic MCM is an inactive double hexamer that encircles duplex DNA. Origin firing depends on ...

    Eukaryotic origins of replication are licensed upon loading of the MCM helicase motor onto DNA. ATP hydrolysis by MCM is required for loading and the post-catalytic MCM is an inactive double hexamer that encircles duplex DNA. Origin firing depends on MCM engagement of Cdc45 and GINS to form the CMG holo-helicase. CMG assembly requires several steps including MCM phosphorylation by DDK. To understand origin activation, here we have determined the cryo-EM structures of DNA-bound MCM, either unmodified or phosphorylated, and visualize a phospho-dependent MCM element likely important for Cdc45 recruitment. MCM pore loops touch both the Watson and Crick strands, constraining duplex DNA in a bent configuration. By comparing our new MCM-DNA structure with the structure of CMG-DNA, we suggest how the conformational transition from the loaded, post-catalytic MCM to CMG might promote DNA untwisting and melting at the onset of replication.

    Organizational Affiliation: 

    Chromosome Replication Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK.,Macromolecular Machines Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK. alessandro.costa@crick.ac.uk.,Macromolecular Machines Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK.,Structural Biology of Cells and Viruses, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK.,Chromatin Structure and Mobile DNA Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA replication licensing factor MCM2
2, A
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, B
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, C
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, D
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, E
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, F
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
MoleculeChainsLengthOrganism
DNA (62-MER)X62synthetic construct
Entity ID: 8
MoleculeChainsLengthOrganism
DNA (62-MER)Y62synthetic construct
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP
Download SDF File 
Download CCD File 
3, 5, B, D
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.77 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-12-06
    Type: Initial release
  • Version 1.1: 2018-01-03
    Type: Database references
  • Version 1.2: 2018-11-21
    Type: Advisory, Data collection, Derived calculations
  • Version 1.3: 2019-11-20
    Type: Database references
  • Version 1.4: 2019-12-11
    Type: Other