1LTL

THE DODECAMER STRUCTURE OF MCM FROM ARCHAEAL M. THERMOAUTOTROPHICUM


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.245 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The Structure and function of MCM from archaeal M. Thermoautotrophicum

Fletcher, R.J.Bishop, B.E.Leon, R.P.Sclafani, R.A.Ogata, C.M.Chen, X.S.

(2003) Nat Struct Biol 10: 160-167

  • DOI: 10.1038/nsb893
  • Primary Citation of Related Structures:  
    1LTL

  • PubMed Abstract: 
  • Eukaryotic chromosomal DNA is licensed for replication precisely once in each cell cycle. The mini-chromosome maintenance (MCM) complex plays a role in this replication licensing. We have determined the structure of a fragment of MCM from Methanobact ...

    Eukaryotic chromosomal DNA is licensed for replication precisely once in each cell cycle. The mini-chromosome maintenance (MCM) complex plays a role in this replication licensing. We have determined the structure of a fragment of MCM from Methanobacterium thermoautotrophicum (mtMCM), a model system for eukaryotic MCM. The structure reveals a novel dodecameric architecture with a remarkably long central channel. The channel surface has an unusually high positive charge and binds DNA. We also show that the structure of the N-terminal fragment is conserved for all MCMs proteins despite highly divergent sequences, suggesting a common architecture for a similar task: gripping/remodeling DNA and regulating MCM activity. An mtMCM mutant protein equivalent to a yeast MCM5 (CDC46) protein with the bob1 mutation at its N terminus has only subtle structural changes, suggesting a Cdc7-bypass mechanism by Bob1 in yeast. Yeast bypass experiments using MCM5 mutant proteins support the hypothesis for the bypass mechanism.


    Organizational Affiliation

    Department of Biochemistry and Molecular Genetics, University of Colorado Health Science Center, School of Medicine, Denver, Colorado 80262, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA replication initiator (Cdc21/Cdc54)ABCDEF279Methanothermobacter thermautotrophicusMutation(s): 0 
EC: 3.6.4.12
Find proteins for O27798 (Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H))
Explore O27798 
Go to UniProtKB:  O27798
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 CCD File 
A, B, C, D, E, F
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.245 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 192.321α = 90
b = 192.321β = 90
c = 365.539γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
SOLVEphasing
CNSrefinement
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-05-27
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2020-01-22
    Changes: Database references, Derived calculations