2VS7

The crystal structure of I-DmoI in complex with DNA and Ca

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 

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This is version 1.2 of the entry. See complete history. 


Literature

Crystal Structure of I-Dmoi in Complex with its Target DNA Provides New Insights Into Meganuclease Engineering.

Marcaida, M.J., Prieto, J., Redondo, P., Nadra, A.D., Alibes, A., Serrano, L., Grizot, S., Duchateau, P., Paques, F., Blanco, F.J., Montoya, G.

(2008) Proc Natl Acad Sci U S A 105: 16888

  • DOI: https://doi.org/10.1073/pnas.0804795105
  • Primary Citation of Related Structures:  
    2VS7, 2VS8

  • PubMed Abstract: 

    • Homing endonucleases, also known as meganucleases, are sequence-specific enzymes with large DNA recognition sites. These enzymes can be used to induce efficient homologous gene targeting in cells and plants, opening perspectives for genome engineering with applications in a wide series of fields, ranging from biotechnology to gene therapy ...

    Homing endonucleases, also known as meganucleases, are sequence-specific enzymes with large DNA recognition sites. These enzymes can be used to induce efficient homologous gene targeting in cells and plants, opening perspectives for genome engineering with applications in a wide series of fields, ranging from biotechnology to gene therapy. Here, we report the crystal structures at 2.0 and 2.1 A resolution of the I-DmoI meganuclease in complex with its substrate DNA before and after cleavage, providing snapshots of the catalytic process. Our study suggests that I-DmoI requires only 2 cations instead of 3 for DNA cleavage. The structure sheds light onto the basis of DNA binding, indicating key residues responsible for nonpalindromic target DNA recognition. In silico and in vivo analysis of the I-DmoI DNA cleavage specificity suggests that despite the relatively few protein-base contacts, I-DmoI is highly specific when compared with other meganucleases. Our data open the door toward the generation of custom endonucleases for targeted genome engineering using the monomeric I-DmoI scaffold.

    Organizational Affiliation: 

    Macromolecular Crystallography and Nuclear Magnetic Resonance Groups, Structural Biology and Biocomputing Programme, Spanish National Cancer Research Centre, c/Melchor Fdez. Almagro 3, 28029 Madrid, Spain.



Macromolecules

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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HOMING ENDONUCLEASE I-DMOI
A, D, G
199Desulfurococcus mucosusMutation(s): 0 
EC: 3.1
UniProt
Find proteins for P21505 (Desulfurococcus mucosus)
Explore P21505 
Go to UniProtKB:  P21505
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP21505
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsLengthOrganismImage
5'-D(*GP*CP*CP*TP*TP*GP*CP*CP*GP*GP *GP*TP*AP*AP*GP*TP*TP*CP*CP*GP*GP*CP*GP*CP*G)-3'
B, E, H
25Desulfurococcus mucosus
Protein Feature View
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  • Reference Sequence

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Entity ID: 3
MoleculeChainsLengthOrganismImage
5'-D(*CP*GP*CP*GP*CP*CP*GP*GP*AP*AP *CP*TP*TP*AP*CP*CP*CP*GP*GP*CP*AP*AP*GP*GP*C)-3'
C, F, I
25Desulfurococcus mucosus
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACT
Query on ACT
Download Ideal Coordinates CCD File 
L [auth D]ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M		 Ligand Interaction
CA
Query on CA
Download Ideal Coordinates CCD File 
J [auth A],
K [auth D],
M [auth G]		CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.187 
  • R-Value Observed: 0.189 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 106.988α = 90
b = 70.587β = 119.75
c = 106.848γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
SHARPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-11-11
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance