Crystal structure analysis of a full-length MCM homolog from Methanopyrus kandleri

Experimental Data Snapshot

  • Resolution: 1.90 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Insights into the Architecture of the Replicative Helicase from the Structure of an Archaeal MCM Homolog.

Bae, B.Chen, Y.H.Costa, A.Onesti, S.Brunzelle, J.S.Lin, Y.Cann, I.K.Nair, S.K.

(2009) Structure 17: 211-222

  • DOI: https://doi.org/10.1016/j.str.2008.11.010
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The minichromosome maintenance (MCM) proteins, members of the AAA+ (ATPase associated with diverse cellular activities) superfamily, are believed to constitute the replicative helicase in eukaryotic and archaeal species. Here, we present the 1.9 A resolution crystal structure of a monomeric MCM homolog from Methanopyrus kandleri, the first crystallographic structure of a full-length MCM. We also present an 18 A cryo-electron microscopy reconstruction of the hexameric MCM from Methanothermobacter thermautotrophicus, and fit the atomic resolution crystal structure into the reconstruction in order to generate an atomic model for the oligomeric assembly. These structural data reveal a distinct active site topology consisting of a unique arrangement of critical determinants. The structures also provide a molecular framework for understanding the functional contributions of trans-acting elements that facilitate intersubunit crosstalk in response to DNA binding and ATP hydrolysis.

  • Organizational Affiliation

    Department of Biochemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Ave, Urbana, IL 61801, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Predicted ATPase involved in replication control, Cdc46/Mcm family506Methanopyrus kandleri AV19Mutation(s): 2 
Gene Names: mcm2_2
Find proteins for Q8TWB5 (Methanopyrus kandleri (strain AV19 / DSM 6324 / JCM 9639 / NBRC 100938))
Explore Q8TWB5 
Go to UniProtKB:  Q8TWB5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8TWB5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.90 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.841α = 90
b = 95.417β = 90
c = 125.374γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
HKL-2000data collection
HKL-2000data reduction

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-03-03
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Advisory, Refinement description
  • Version 1.3: 2021-10-20
    Changes: Advisory, Database references
  • Version 1.4: 2023-12-27
    Changes: Data collection