4FDG

Crystal Structure of an Archaeal MCM Filament


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.10 Å
  • R-Value Free: 0.341 
  • R-Value Work: 0.331 
  • R-Value Observed: 0.332 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Mini-chromosome maintenance complexes form a filament to remodel DNA structure and topology.

Slaymaker, I.M.Fu, Y.Toso, D.B.Ranatunga, N.Brewster, A.Forsburg, S.L.Zhou, Z.H.Chen, X.S.

(2013) Nucleic Acids Res 41: 3446-3456

  • DOI: 10.1093/nar/gkt022
  • Primary Citation of Related Structures:  
    4FDG

  • PubMed Abstract: 
  • Deregulation of mini-chromosome maintenance (MCM) proteins is associated with genomic instability and cancer. MCM complexes are recruited to replication origins for genome duplication. Paradoxically, MCM proteins are in excess than the number of origins and are associated with chromatin regions away from the origins during G1 and S phases ...

    Deregulation of mini-chromosome maintenance (MCM) proteins is associated with genomic instability and cancer. MCM complexes are recruited to replication origins for genome duplication. Paradoxically, MCM proteins are in excess than the number of origins and are associated with chromatin regions away from the origins during G1 and S phases. Here, we report an unusually wide left-handed filament structure for an archaeal MCM, as determined by X-ray and electron microscopy. The crystal structure reveals that an α-helix bundle formed between two neighboring subunits plays a critical role in filament formation. The filament has a remarkably strong electro-positive surface spiraling along the inner filament channel for DNA binding. We show that this MCM filament binding to DNA causes dramatic DNA topology change. This newly identified function of MCM to change DNA topology may imply a wider functional role for MCM in DNA metabolisms beyond helicase function. Finally, using yeast genetics, we show that the inter-subunit interactions, important for MCM filament formation, play a role for cell growth and survival.


    Organizational Affiliation

    Molecular and Computational Biology, University of Southern California, Los Angeles, CA 90089, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Minichromosome maintenance protein MCMB [auth A], A [auth B], C, D, E692Saccharolobus solfataricusMutation(s): 0 
EC: 3.6.4.12
Find proteins for Q9UXG1 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2))
Explore Q9UXG1 
Go to UniProtKB:  Q9UXG1
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.10 Å
  • R-Value Free: 0.341 
  • R-Value Work: 0.331 
  • R-Value Observed: 0.332 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 169.663α = 90
b = 107.737β = 107.89
c = 170.205γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-03-06
    Type: Initial release
  • Version 1.1: 2013-03-20
    Changes: Structure summary
  • Version 1.2: 2013-03-27
    Changes: Database references
  • Version 1.3: 2018-01-24
    Changes: Structure summary