4FDG

Crystal Structure of an Archaeal MCM Filament


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.1 Å
  • R-Value Free: 0.341 
  • R-Value Work: 0.331 

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

  • 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 orig ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Minichromosome maintenance protein MCM
B, A, C, D, E
692Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)Mutation(s): 0 
Gene Names: MCM
EC: 3.6.4.12
Find proteins for Q9UXG1 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2))
Go to UniProtKB:  Q9UXG1
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B, C, D, E
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 4.1 Å
  • R-Value Free: 0.341 
  • R-Value Work: 0.331 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 169.663α = 90.00
b = 107.737β = 107.89
c = 170.205γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
PHASERphasing
PDB_EXTRACTdata extraction
DENZOdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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