2LE8

The protein complex for DNA replication


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 19 
  • Selection Criteria: structures with the least restraint violations 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural insights into the Cdt1-mediated MCM2-7 chromatin loading

Liu, C.Wu, R.Zhou, B.Wang, J.Wei, Z.Tye, B.K.Liang, C.Zhu, G.

(2012) Nucleic Acids Res. 40: 3208-3217

  • DOI: 10.1093/nar/gkr1118

  • PubMed Abstract: 
  • Initiation of DNA replication in eukaryotes is exquisitely regulated to ensure that DNA replication occurs exactly once in each cell division. A conserved and essential step for the initiation of eukaryotic DNA replication is the loading of the mini- ...

    Initiation of DNA replication in eukaryotes is exquisitely regulated to ensure that DNA replication occurs exactly once in each cell division. A conserved and essential step for the initiation of eukaryotic DNA replication is the loading of the mini-chromosome maintenance 2-7 (MCM2-7) helicase onto chromatin at replication origins by Cdt1. To elucidate the molecular mechanism of this event, we determined the structure of the human Cdt1-Mcm6 binding domains, the Cdt1(410-440)/MCM6(708-821) complex by NMR. Our structural and site-directed mutagenesis studies showed that charge complementarity is a key determinant for the specific interaction between Cdt1 and Mcm2-7. When this interaction was interrupted by alanine substitutions of the conserved interacting residues, the corresponding yeast Cdt1 and Mcm6 mutants were defective in DNA replication and the chromatin loading of Mcm2, resulting in cell death. Having shown that Cdt1 and Mcm6 interact through their C-termini, and knowing that Cdt1 is tethered to Orc6 during the loading of MCM2-7, our results suggest that the MCM2-7 hexamer is loaded with its C terminal end facing the ORC complex. These results provide a structural basis for the Cdt1-mediated MCM2-7 chromatin loading.


    Organizational Affiliation

    Division of Life Science and State Key Laboratory of Molecular Neuroscience, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DNA replication licensing factor MCM6
A
114Homo sapiensMutation(s): 1 
Gene Names: MCM6
EC: 3.6.4.12
Find proteins for Q14566 (Homo sapiens)
Go to Gene View: MCM6
Go to UniProtKB:  Q14566
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
DNA replication factor Cdt1
B
29Homo sapiensMutation(s): 0 
Gene Names: CDT1
Find proteins for Q9H211 (Homo sapiens)
Go to Gene View: CDT1
Go to UniProtKB:  Q9H211
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 19 
  • Selection Criteria: structures with the least restraint violations 
  • Olderado: 2LE8 Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2011-06-14 
  • Released Date: 2012-12-19 
  • Deposition Author(s): Liu, C., Wei, Z., Zhu, G.

Revision History 

  • Version 1.0: 2012-12-19
    Type: Initial release
  • Version 1.1: 2017-06-21
    Type: Database references