185L

SPECIFICITY OF LIGAND BINDING IN A BURIED NON-POLAR CAVITY OF T4 LYSOZYME: LINKAGE OF DYNAMICS AND STRUCTURAL PLASTICITY


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Observed: 0.169 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Specificity of ligand binding in a buried nonpolar cavity of T4 lysozyme: linkage of dynamics and structural plasticity.

Morton, A.Matthews, B.W.

(1995) Biochemistry 34: 8576-8588

  • DOI: 10.1021/bi00027a007
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • To better understand the role of shape complementarity in ligand binding and protein core interactions, the structures have been determined of a set of ligands bound within a cavity-containing mutant of T4 lysozyme. The interior cavity is seen to con ...

    To better understand the role of shape complementarity in ligand binding and protein core interactions, the structures have been determined of a set of ligands bound within a cavity-containing mutant of T4 lysozyme. The interior cavity is seen to consist of two parts that respond very differently to the binding of ligands. First, there is a relatively rigid region that does not relax significantly upon binding any ligand. Second, there is a more flexible region that moves to various extents in response to binding the different ligands. The part of the binding site that remains rigid is characterized by low temperature factors and strong protection from hydrogen exchange. This part of the site appears to be primarily responsible for discriminating between ligands of different shape (i.e., for determining specificity). The more flexible region, characterized by relatively high temperature factors and weak protection from hydrogen exchange, allows some promiscuity in binding by undergoing variable amounts of deformation at essentially the same energetic cost. This linkage between the dynamic information represented by crystallographic temperature factors and hydrogen-exchange behavior on the one hand, and structural plasticity in response to ligand binding on the other hand, suggests a way to improve our understanding of steric interactions in protein cores and protein-ligand binding sites. Ligand design and packing algorithms might take advantage of this information, requiring complementary interactions where the protein is rigid and allowing some overlap in regions where the protein is flexible.


    Related Citations: 
    • Energetic Origins of Specificity of Ligand Binding in an Interior Cavity of T4 Lysozyme
      Morton, A., Baase, W.A., Matthews, B.W.
      () To be published --: --
    • Structure of Bacteriophage T4 Lysozyme Refined at 1.7 Angstroms Resolution
      Weaver, L.H., Matthews, B.W.
      (1987) J Mol Biol 193: 189

    Organizational Affiliation

    Institute of Molecular Biology, Howard Hughes Medical Institute, Eugene, Oregon, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
T4 LYSOZYMEA164Escherichia virus T4Mutation(s): 0 
Gene Names: E
EC: 3.2.1.17
Find proteins for P00720 (Enterobacteria phage T4)
Explore P00720 
Go to UniProtKB:  P00720
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HED
Query on HED

Download CCD File 
A
2-HYDROXYETHYL DISULFIDE
C4 H10 O2 S2
KYNFOMQIXZUKRK-UHFFFAOYSA-N
 Ligand Interaction
IND
Query on IND

Download CCD File 
A
INDOLE
C8 H7 N
SIKJAQJRHWYJAI-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
INDKd :  290000   nM  PDBBind
INDKd:  289000   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Observed: 0.169 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.7α = 90
b = 60.7β = 90
c = 97.6γ = 120
Software Package:
Software NamePurpose
TNTrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-07-10
    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: 2017-11-29
    Changes: Derived calculations, Other