6XTY

CryoEM structure of human CMG bound to AND-1 (CMGA)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.77 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

CryoEM structures of human CMG-ATP gamma S-DNA and CMG-AND-1 complexes.

Rzechorzek, N.J.Hardwick, S.W.Jatikusumo, V.A.Chirgadze, D.Y.Pellegrini, L.

(2020) Nucleic Acids Res 48: 6980-6995

  • DOI: 10.1093/nar/gkaa429
  • Primary Citation of Related Structures:  
    6XTY, 6XTX

  • PubMed Abstract: 
  • DNA unwinding in eukaryotic replication is performed by the Cdc45-MCM-GINS (CMG) helicase. Although the CMG architecture has been elucidated, its mechanism of DNA unwinding and replisome interactions remain poorly understood. Here we report the cryoEM structure at 3 ...

    DNA unwinding in eukaryotic replication is performed by the Cdc45-MCM-GINS (CMG) helicase. Although the CMG architecture has been elucidated, its mechanism of DNA unwinding and replisome interactions remain poorly understood. Here we report the cryoEM structure at 3.3 Å of human CMG bound to fork DNA and the ATP-analogue ATPγS. Eleven nucleotides of single-stranded (ss) DNA are bound within the C-tier of MCM2-7 AAA+ ATPase domains. All MCM subunits contact DNA, from MCM2 at the 5'-end to MCM5 at the 3'-end of the DNA spiral, but only MCM6, 4, 7 and 3 make a full set of interactions. DNA binding correlates with nucleotide occupancy: five MCM subunits are bound to either ATPγS or ADP, whereas the apo MCM2-5 interface remains open. We further report the cryoEM structure of human CMG bound to the replisome hub AND-1 (CMGA). The AND-1 trimer uses one β-propeller domain of its trimerisation region to dock onto the side of the helicase assembly formed by Cdc45 and GINS. In the resulting CMGA architecture, the AND-1 trimer is closely positioned to the fork DNA while its CIP (Ctf4-interacting peptide)-binding helical domains remain available to recruit partner proteins.


    Organizational Affiliation

    Department of Biochemistry, Tennis Court Road, Cambridge CB2 1GA, UK.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM2A [auth 2]904Homo sapiensMutation(s): 0 
Gene Names: MCM2BM28CCNL1CDCL1KIAA0030
EC: 3.6.4.12
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM3B [auth 3]853Homo sapiensMutation(s): 0 
Gene Names: MCM3
EC: 3.6.4.12
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM4C [auth 4]863Homo sapiensMutation(s): 0 
Gene Names: MCM4CDC21
EC: 3.6.4.12
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM5D [auth 5]734Homo sapiensMutation(s): 0 
Gene Names: MCM5CDC46
EC: 3.6.4.12
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM6E [auth 6]821Homo sapiensMutation(s): 0 
Gene Names: MCM6
EC: 3.6.4.12
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM7F [auth 7]719Homo sapiensMutation(s): 0 
Gene Names: MCM7CDC47MCM2
EC: 3.6.4.12
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication complex GINS protein PSF1G [auth A]196Homo sapiensMutation(s): 0 
Gene Names: GINS1KIAA0186PSF1
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication complex GINS protein PSF2H [auth B]185Homo sapiensMutation(s): 0 
Gene Names: GINS2PSF2CGI-122DC5HSPC037
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication complex GINS protein PSF3I [auth C]216Homo sapiensMutation(s): 0 
Gene Names: GINS3PSF3
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication complex GINS protein SLD5J [auth D]223Homo sapiensMutation(s): 0 
Gene Names: GINS4SLD5
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
Cell division control protein 45 homologK [auth E]566Homo sapiensMutation(s): 1 
Gene Names: CDC45CDC45LCDC45L2UNQ374/PRO710
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetailsImage
WD repeat and HMG-box DNA-binding protein 1L [auth F], M [auth G], N [auth H]1171Homo sapiensMutation(s): 0 
Gene Names: WDHD1AND1
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.77 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom104641/Z/14/Z

Revision History  (Full details and data files)

  • Version 1.0: 2020-05-27
    Type: Initial release
  • Version 1.1: 2020-06-10
    Changes: Database references
  • Version 1.2: 2020-07-15
    Changes: Database references