184L

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: 1.8 Å

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

  • Primary Citation of Related Structures:  181L, 182L, 183L, 185L, 186L, 187L, 188L, 1NHB

  • 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: 
    • Structure of Bacteriophage T4 Lysozyme Refined at 1.7 Angstroms Resolution
      Weaver, L.H.,Matthews, B.W.
      (1987) J.Mol.Biol. 193: 189
    • 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 --: --


    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 LYSOZYME
A
164Enterobacteria phage T4Gene Names: E
EC: 3.2.1.17
Find proteins for P00720 (Enterobacteria phage T4)
Go to UniProtKB:  P00720
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
HED
Query on HED

Download SDF File 
Download CCD File 
A
2-HYDROXYETHYL DISULFIDE
C4 H10 O2 S2
KYNFOMQIXZUKRK-UHFFFAOYSA-N
 Ligand Interaction
I4B
Query on I4B

Download SDF File 
Download CCD File 
A
ISOBUTYLBENZENE
C10 H14
KXUHSQYYJYAXGZ-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
I4BKd: 19000 nM (97) BINDINGDB
I4BKa: 51000 M-1 BINDINGMOAD
I4BKd: 19000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 60.900α = 90.00
b = 60.900β = 90.00
c = 97.300γ = 120.00
Software Package:
Software NamePurpose
TNTrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1995-07-10
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-11-29
    Type: Derived calculations, Other