Crystal structure of restriction endonuclease EcoRII mutant R88A

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.236 

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Crystal structure of type IIE restriction endonuclease EcoRII reveals an autoinhibition mechanism by a novel effector-binding fold.

Zhou, X.E.Wang, Y.Reuter, M.Mucke, M.Kruger, D.H.Meehan, E.J.Chen, L.

(2004) J Mol Biol 335: 307-319

  • DOI: https://doi.org/10.1016/j.jmb.2003.10.030
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    EcoRII is a type IIE restriction endonuclease that interacts with two copies of the DNA recognition sequence 5'CCWGG, one being the actual target of cleavage, the other serving as the allosteric effector. The mode of enzyme activation by effector binding is unknown. To investigate the molecular basis of activation and cleavage mechanisms by EcoRII, the crystal structure of EcoRII mutant R88A has been solved at 2.1A resolution. The EcoRII monomer has two domains linked through a hinge loop. The N-terminal effector-binding domain has a novel DNA recognition fold with a prominent cleft. The C-terminal catalytic domain has a restriction endonuclease-like fold. Structure-based sequence alignment identified the putative catalytic site of EcoRII that is spatially blocked by the N-terminal domain. The structure together with the earlier characterized EcoRII enzyme activity enhancement in the absence of its N-terminal domain reveal an autoinhibition/activation mechanism of enzyme activity mediated by a novel effector-binding fold. This is the first case of autoinhibition, a mechanism described for many transcription factors and signal transducing proteins, of a restriction endonuclease.

  • Organizational Affiliation

    Laboratory for Structural Biology, Department of Chemistry, Graduate Programs of Biotechnology, Chemistry and Materials Science, University of Alabama in Huntsville, Huntsville, AL 35899, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Restriction endonuclease EcoRII
A, B
404Escherichia coliMutation(s): 1 
Gene Names: EcoRII
Find proteins for P14633 (Escherichia coli)
Explore P14633 
Go to UniProtKB:  P14633
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP14633
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.230 
  • R-Value Observed: 0.236 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.746α = 90
b = 92.36β = 108.08
c = 88.308γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
ISIRASmodel building
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-12-16
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-10-27
    Changes: Database references
  • Version 1.4: 2024-02-14
    Changes: Data collection