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
  • Primary Citation of Related Structures:  
    6F0L

  • 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 MCM ...

    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

    Macromolecular Machines Laboratory, The Francis Crick Institute, 1 Midland Road, London, NW1 1AT, UK. alessandro.costa@crick.ac.uk.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM2 2A868Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: MCM2YBL023CYBL0438
EC: 3.6.4.12
Find proteins for P29469 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM3 3B971Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: MCM3YEL032WSYGP-ORF23
EC: 3.6.4.12
Find proteins for P24279 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM4 4C933Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: MCM4CDC54HCD21YPR019WYP9531.13
EC: 3.6.4.12
Find proteins for P30665 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Minichromosome maintenance protein 5 5D775Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: MCM5CDC46YLR274WL9328.1
EC: 3.6.4.12
Find proteins for P29496 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM6 6E1017Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: MCM6YGL201C
EC: 3.6.4.12
Find proteins for P53091 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM7 7F845Saccharomyces cerevisiae S288CMutation(s): 0 
Gene Names: MCM7CDC47YBR202WYBR1441
EC: 3.6.4.12
Find proteins for P38132 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
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  • Reference Sequence
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Entity ID: 7
MoleculeChainsLengthOrganismImage
DNA (62-MER)X62synthetic construct
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Entity ID: 8
MoleculeChainsLengthOrganismImage
DNA (62-MER)Y62synthetic construct
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download Ideal Coordinates 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

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Entry History 

Deposition Data

Revision History 

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