4ME3

1.8 Angstrom Crystal Structure of the N-terminal Domain of an Archaeal MCM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.79 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 

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This is version 1.3 of the entry. See complete history


Literature

The 1.8- angstrom Crystal Structure of the N-Terminal Domain of an Archaeal MCM as a Right-Handed Filament.

Fu, Y.Slaymaker, I.M.Wang, J.Wang, G.Chen, X.S.

(2014) J Mol Biol 426: 1512-1523

  • DOI: 10.1016/j.jmb.2013.12.025
  • Primary Citation of Related Structures:  
    4ME3

  • PubMed Abstract: 
  • Mini-chromosome maintenance (MCM) proteins are the replicative helicase necessary for DNA replication in both eukarya and archaea. Most of archaea only have one MCM gene. Here, we report a 1.8-Å crystal structure of the N-terminal MCM from the archaeon Thermoplasma acidophilum (tapMCM) ...

    Mini-chromosome maintenance (MCM) proteins are the replicative helicase necessary for DNA replication in both eukarya and archaea. Most of archaea only have one MCM gene. Here, we report a 1.8-Å crystal structure of the N-terminal MCM from the archaeon Thermoplasma acidophilum (tapMCM). In the structure, the MCM N-terminus forms a right-handed filament that contains six subunits in each turn, with a diameter of 25Å of the central channel opening. The inner surface is highly positively charged, indicating DNA binding. This filament structure with six subunits per turn may also suggests a potential role for an open-ring structure for hexameric MCM and dynamic conformational changes in initiation and elongation stages of DNA replication.


    Organizational Affiliation

    Molecular and Computational Biology Program, Department of Biological Sciences, University of Southern California, Los Angeles, CA 90089, USA; Department of Chemistry, University of Southern California, Los Angeles, CA 90089, USA; Center of Excellence in NanoBiophysics, University of Southern California, Los Angeles, CA 90089, USA; Norris Comprehensive Cancer Center, University of Southern California, Los Angeles, CA 90089, USA. Electronic address: Xiaojiang.chen@usc.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication licensing factor MCM related proteinA268Thermoplasma acidophilumMutation(s): 0 
Gene Names: Ta0799
Find proteins for Q9HK10 (Thermoplasma acidophilum (strain ATCC 25905 / DSM 1728 / JCM 9062 / NBRC 15155 / AMRC-C165))
Explore Q9HK10 
Go to UniProtKB:  Q9HK10
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
B [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.79 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.184 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.46α = 90
b = 93.46β = 90
c = 56.231γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-01-08
    Type: Initial release
  • Version 1.1: 2014-01-29
    Changes: Database references
  • Version 1.2: 2014-03-26
    Changes: Database references
  • Version 1.3: 2017-11-15
    Changes: Refinement description