1L83

A CAVITY-CONTAINING MUTANT OF T4 LYSOZYME IS STABILIZED BY BURIED BENZENE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Observed: 0.152 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

A cavity-containing mutant of T4 lysozyme is stabilized by buried benzene.

Eriksson, A.E.Baase, W.A.Wozniak, J.A.Matthews, B.W.

(1992) Nature 355: 371-373

  • DOI: 10.1038/355371a0
  • Primary Citation of Related Structures:  
    1L83, 1L84

  • PubMed Abstract: 
  • The hydrophobic cores of proteins are generally well packed, with few cavities. Mutations in which a bulky buried residue such as leucine or phenylalanine is replaced with a small residue such as alanine can create cavities in the core of a protein (our unpublished results) ...

    The hydrophobic cores of proteins are generally well packed, with few cavities. Mutations in which a bulky buried residue such as leucine or phenylalanine is replaced with a small residue such as alanine can create cavities in the core of a protein (our unpublished results). The sizes and shapes of such cavities can vary substantially depending on factors such as local geometry, whether or not a cavity already exists at the site of substitution, and the degree to which the protein structure relaxes to occupy the space vacated by the substituted residue. We show by crystallographic and thermodynamic analysis that the cavity created by the replacement Leu 99----Ala in T4 lysozyme is large enough to bind benzene and that ligand binding increases the melting temperature of the protein by 6.0 degrees C at pH 3.0. Benzene does not, however, bind to the cavity created by the Phe 153----Ala replacement. The results show that cavities can be engineered in proteins and suggest that such cavities might be tailored to bind specific ligands. The binding of benzene at an internal site 7 A from the molecular surface also illustrates the dynamic nature of proteins, even in crystals.


    Organizational Affiliation

    Institute of Molecular Biology, Howard Hughes Medical Institute, University of Oregon, Eugene 97403.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
T4 LYSOZYMEA164Escherichia virus T4Mutation(s): 0 
Gene Names: E
EC: 3.2.1.17
UniProt
Find proteins for P00720 (Enterobacteria phage T4)
Explore P00720 
Go to UniProtKB:  P00720
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
BME
Query on BME

Download Ideal Coordinates CCD File 
D [auth A], E [auth A]BETA-MERCAPTOETHANOL
C2 H6 O S
DGVVWUTYPXICAM-UHFFFAOYSA-N
 Ligand Interaction
BNZ
Query on BNZ

Download Ideal Coordinates CCD File 
F [auth A]BENZENE
C6 H6
UHOVQNZJYSORNB-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download Ideal Coordinates CCD File 
B [auth A], C [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
BNZ Binding MOAD:  1L83 Kd: 4.00e+5 (nM) from 1 assay(s)
PDBBind:  1L83 Kd: 4.00e+5 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Observed: 0.152 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.9α = 90
b = 60.9β = 90
c = 96.9γ = 120
Software Package:
Software NamePurpose
TNTrefinement

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1993-10-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations, Other