Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 6-mer - A6 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 194412.42 
• Atom Count: 11633 
• Residue Count: 1674 
• Unique protein chains: 1

1LTL

THE DODECAMER STRUCTURE OF MCM FROM ARCHAEAL M. THERMOAUTOTROPHICUM

• DOI: 10.2210/pdb1LTL/pdb

• Classification: REPLICATION
• Organism(s): Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H)
• Expression System: Escherichia coli


• Deposited: 2002-05-20 Released: 2003-05-27 
• Deposition Author(s): Fletcher, R.J., Bishop, B.E., Leon, R.P., Sclafani, R.A., Ogata, C.M., Chen, X.S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3 Å
• R-Value Free: 0.295 
• R-Value Work: 0.245 

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.Mol.Biol. 10: 160-167

• PubMed: 12548282 
• DOI: 10.1038/nsb893


• 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 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.

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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: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
DNA replication initiator (Cdc21/Cdc54)	A, B, C, D, E, F	279	Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H)	Mutation(s): 0
Find proteins for O27798 (Methanothermobacter thermautotrophicus (strain ATCC 29096 / DSM 1053 / JCM 10044 / NBRC 100330 / Delta H)) Go to UniProtKB:  O27798

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ZN	A, B, C, D, E, F	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3 Å
• R-Value Free: 0.295 
• R-Value Work: 0.245 
• Space Group: H 3 2

Unit Cell:

Length (Å)	Angle (°)
a = 192.321	α = 90.00
b = 192.321	β = 90.00
c = 365.539	γ = 120.00

Software Package:

Software Name	Purpose
SCALEPACK	data scaling
SOLVE	phasing
CNS	refinement
HKL-2000	data reduction
HKL-2000	data collection

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-05-20 
• Released Date: 2003-05-27 
• Deposition Author(s): Fletcher, R.J., Bishop, B.E., Leon, R.P., Sclafani, R.A., Ogata, C.M., Chen, X.S.

Revision History 

• Version 1.0: 2003-05-27
  Type: Initial release
• Version 1.1: 2008-04-28
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance