1AVQ

TOROIDAL STRUCTURE OF LAMBDA EXONUCLEASE DETERMINED AT 2.4 ANGSTROMS

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Work: 0.198 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

Toroidal structure of lambda-exonuclease.

Kovall, R., Matthews, B.W.

(1997) Science 277: 1824-1827

  • DOI: 10.1126/science.277.5333.1824
  • Primary Citation of Related Structures:  
    1AVQ

  • PubMed Abstract: 

    • Structure determination at 2.4 angstrom resolution shows that lambda-exonuclease consists of three subunits that form a toroid. The central channel is funnel shaped, tapering from an inner diameter of about 30 angstroms at the wider end to 15 angstroms at the narrow end ...

    Structure determination at 2.4 angstrom resolution shows that lambda-exonuclease consists of three subunits that form a toroid. The central channel is funnel shaped, tapering from an inner diameter of about 30 angstroms at the wider end to 15 angstroms at the narrow end. This is adequate to accommodate the DNA substrate and thus provides a structural basis for the ability of the enzyme to sequentially hydrolyze thousands of nucleotides in a highly processive manner. The results also suggest the locations of the active sites and the constraints that limit cleavage to a single strand.

    Organizational Affiliation: 

    Institute of Molecular Biology, Howard Hughes Medical Institute, and Department of Physics, University of Oregon, Eugene, OR 97403, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
LAMBDA EXONUCLEASEA, B, C228Escherichia virus LambdaMutation(s): 0 
Gene Names: exo, red-alpha, redX
EC: 3.1.11.3
UniProt
Find proteins for P03697 (Escherichia phage lambda)
Explore P03697 
Go to UniProtKB:  P03697
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03697
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Work: 0.198 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 156.7α = 90
b = 156.7β = 90
c = 131.7γ = 90
Software Package:
Software NamePurpose
TNTrefinement
XTALVIEWrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1998-03-18
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2019-07-17
    Changes: Data collection, Refinement description