4UUZ

MCM2-histone complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.230 
  • R-Value Observed: 0.199 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural Insight Into How the Human Helicase Subunit Mcm2 May Act as a Histone Chaperone Together with Asf1 at the Replication Fork.

Richet, N.Liu, D.Legrand, P.Velours, C.Corpet, A.Gaubert, A.Bakail, M.Moal-Raisin, G.Guerois, R.Compper, C.Besle, A.Guichard, B.Almouzni, G.Ochsenbein, F.

(2015) Nucleic Acids Res 43: 1905

  • DOI: 10.1093/nar/gkv021
  • Primary Citation of Related Structures:  
    4UUZ

  • PubMed Abstract: 
  • MCM2 is a subunit of the replicative helicase machinery shown to interact with histones H3 and H4 during the replication process through its N-terminal domain. During replication, this interaction has been proposed to assist disassembly and assembly ...

    MCM2 is a subunit of the replicative helicase machinery shown to interact with histones H3 and H4 during the replication process through its N-terminal domain. During replication, this interaction has been proposed to assist disassembly and assembly of nucleosomes on DNA. However, how this interaction participates in crosstalk with histone chaperones at the replication fork remains to be elucidated. Here, we solved the crystal structure of the ternary complex between the histone-binding domain of Mcm2 and the histones H3-H4 at 2.9 Å resolution. Histones H3 and H4 assemble as a tetramer in the crystal structure, but MCM2 interacts only with a single molecule of H3-H4. The latter interaction exploits binding surfaces that contact either DNA or H2B when H3-H4 dimers are incorporated in the nucleosome core particle. Upon binding of the ternary complex with the histone chaperone ASF1, the histone tetramer dissociates and both MCM2 and ASF1 interact simultaneously with the histones forming a 1:1:1:1 heteromeric complex. Thermodynamic analysis of the quaternary complex together with structural modeling support that ASF1 and MCM2 could form a chaperoning module for histones H3 and H4 protecting them from promiscuous interactions. This suggests an additional function for MCM2 outside its helicase function as a proper histone chaperone connected to the replication pathway.


    Organizational Affiliation

    CEA, iBiTec-S, SB2SM, Laboratoire de Biologie Structurale et Radiobiologie, France Institute for Integrative Biology of the Cell (I2BC), CEA, CNRS, Université Paris-Sud, Batiment 144, Gif-sur-Yvette, F-91191, France francoise.ochsenbein@cea.fr.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HISTONE H3A136Drosophila melanogasterMutation(s): 0 
Gene Names: 
Find proteins for P02299 (Drosophila melanogaster)
Explore P02299 
Go to UniProtKB:  P02299
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HISTONE H4B103Drosophila melanogasterMutation(s): 0 
Gene Names: 
Find proteins for P84040 (Drosophila melanogaster)
Explore P84040 
Go to UniProtKB:  P84040
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
DNA REPLICATION LICENSING FACTOR MCM2C70Homo sapiensMutation(s): 0 
Gene Names: MCM2BM28CCNL1CDCL1KIAA0030
EC: 3.6.4.12
Find proteins for P49736 (Homo sapiens)
Explore P49736 
Go to UniProtKB:  P49736
NIH Common Fund Data Resources
PHAROS  P49736
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.230 
  • R-Value Observed: 0.199 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 140.09α = 90
b = 140.09β = 90
c = 65.87γ = 120
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
XDSdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-02-11
    Type: Initial release
  • Version 1.1: 2015-03-04
    Changes: Database references
  • Version 1.2: 2016-04-06
    Changes: Structure summary
  • Version 1.3: 2019-07-03
    Changes: Data collection, Experimental preparation, Other, Source and taxonomy