3H15

Crystal structure of replication initiation factor MCM10-ID bound to ssDNA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.72 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.199 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Physical Interactions between Mcm10, DNA, and DNA Polymerase {alpha}.

Warren, E.M.Huang, H.Fanning, E.Chazin, W.J.Eichman, B.F.

(2009) J Biol Chem 284: 24662-24672

  • DOI: 10.1074/jbc.M109.020438
  • Primary Citation of Related Structures:  
    3H15

  • PubMed Abstract: 
  • Mcm10 is an essential eukaryotic protein required for the initiation and elongation phases of chromosomal replication. Specifically, Mcm10 is required for the association of several replication proteins, including DNA polymerase alpha (pol alpha), with chromatin ...

    Mcm10 is an essential eukaryotic protein required for the initiation and elongation phases of chromosomal replication. Specifically, Mcm10 is required for the association of several replication proteins, including DNA polymerase alpha (pol alpha), with chromatin. We showed previously that the internal (ID) and C-terminal (CTD) domains of Mcm10 physically interact with both single-stranded (ss) DNA and the catalytic p180 subunit of pol alpha. However, the mechanism by which Mcm10 interacts with pol alpha on and off DNA is unclear. As a first step toward understanding the structural details for these critical intermolecular interactions, x-ray crystallography and NMR spectroscopy were used to map the binary interfaces between Mcm10-ID, ssDNA, and p180. The crystal structure of an Mcm10-ID*ssDNA complex confirmed and extended our previous evidence that ssDNA binds within the oligonucleotide/oligosaccharide binding-fold cleft of Mcm10-ID. We show using NMR chemical shift perturbation and fluorescence spectroscopy that p180 also binds to the OB-fold and that ssDNA and p180 compete for binding to this motif. In addition, we map a minimal Mcm10 binding site on p180 to a small region within the p180 N-terminal domain (residues 286-310). These findings, together with data for DNA and p180 binding to an Mcm10 construct that contains both the ID and CTD, provide the first mechanistic insight into how Mcm10 might use a handoff mechanism to load and stabilize pol alpha within the replication fork.


    Organizational Affiliation

    Department of Biological Sciences, Vanderbilt University, Nashville, Tennessee 37232, USA.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein MCM10 homologA198Xenopus laevisMutation(s): 0 
Gene Names: mcm10
UniProt
Find proteins for Q5EAW4 (Xenopus laevis)
Explore Q5EAW4 
Go to UniProtKB:  Q5EAW4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ5EAW4
Protein Feature View
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  • Reference Sequence

Find similar nucleic acids by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChainsLengthOrganismImage
5'-D(*CP*CP*CP*CP*CP*CP*CP*CP*C)-3'B9N/A
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 
C [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.72 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.199 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 95.017α = 90
b = 95.017β = 90
c = 61.159γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
MOLREPphasing
PHENIXrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-07-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2013-09-25
    Changes: Derived calculations