1WTE

Crystal structure of type II restrcition endonuclease, EcoO109I complexed with cognate DNA

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.173 

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


Literature

Crystal structures of type II restriction endonuclease EcoO109I and its complex with cognate DNA

Hashimoto, H., Shimizu, T., Imasaki, T., Kato, M., Shichijo, N., Kita, K., Sato, M.

(2005) J Biol Chem 280: 5605-5610

  • DOI: 10.1074/jbc.M411684200
  • Primary Citation of Related Structures:  
    1WTD, 1WTE

  • PubMed Abstract: 

    • EcoO109I is a type II restriction endonuclease that recognizes the DNA sequence of RGGNCCY. Here we describe the crystal structures of EcoO109I and its complex with DNA. A comparison of the two structures shows that the catalytic domain moves drastically to capture the DNA ...

    EcoO109I is a type II restriction endonuclease that recognizes the DNA sequence of RGGNCCY. Here we describe the crystal structures of EcoO109I and its complex with DNA. A comparison of the two structures shows that the catalytic domain moves drastically to capture the DNA. One metal ion and two water molecules are observed near the active site of the DNA complex. The metal ion is a Lewis acid that stabilizes the pentavalent phosphorus atom in the transition state. One water molecule, activated by Lys-126, attacks the phosphorus atom in an S(N)2 mechanism, whereas the other water interacts with the 3'-leaving oxygen to donate a proton to the oxygen. EcoO109I is similar to EcoRI family enzymes in terms of its DNA cleavage pattern and folding topology of the common motif in the catalytic domain, but it differs in the manner of DNA recognition. Our findings propose a novel classification of the type II restriction endonucleases and lead to the suggestion that EcoO109I represents a new subclass of the EcoRI family.

    Organizational Affiliation: 

    Graduate School of Integrated Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan.



Macromolecules

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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
EcoO109IRC [auth A],
D [auth B]		272Escherichia coliMutation(s): 0 
Gene Names: ecoO109IR, ERS085365_04794, ERS085386_00889
EC: 3.1.21.4
UniProt
Find proteins for Q9RPJ3 (Escherichia coli)
Explore Q9RPJ3 
Go to UniProtKB:  Q9RPJ3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9RPJ3
Protein Feature View
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  • Reference Sequence

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Entity ID: 1
MoleculeChainsLengthOrganismImage
5'-D(*AP*CP*CP*GP*GP*GP*CP*CP*CP*TP*GP*CP*C)-3'A [auth X]13N/A
Protein Feature View
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  • Reference Sequence

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Entity ID: 2
MoleculeChainsLengthOrganismImage
5'-D(*GP*GP*CP*AP*GP*GP*GP*CP*CP*CP*GP*GP*T)-3'B [auth Y]13N/A
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA
Download Ideal Coordinates CCD File 
E [auth A],
F [auth B]		SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.173 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.103α = 90
b = 71.879β = 90
c = 203.24γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
CrystalCleardata reduction
SOLVEphasing
REFMACrefinement
CrystalCleardata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-12-14
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance