1CU0

T4 LYSOZYME MUTANT I78M


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.173 
  • R-Value Observed: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Methionine and alanine substitutions show that the formation of wild-type-like structure in the carboxy-terminal domain of T4 lysozyme is a rate-limiting step in folding.

Gassner, N.C.Baase, W.A.Lindstrom, J.D.Lu, J.Dahlquist, F.W.Matthews, B.W.

(1999) Biochemistry 38: 14451-14460

  • DOI: 10.1021/bi9915519
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • In an attempt to identify a systematic relation between the structure of a protein and its folding kinetics, the rate of folding was determined for 20 mutants of T4 lysozyme in which a bulky, buried, nonpolar wild-type residue (Leu, Ile, Phe, Val, or ...

    In an attempt to identify a systematic relation between the structure of a protein and its folding kinetics, the rate of folding was determined for 20 mutants of T4 lysozyme in which a bulky, buried, nonpolar wild-type residue (Leu, Ile, Phe, Val, or Met) was substituted with alanine. Methionine, which approximated the size of the original side chain but which is of different shape and flexibility, was also substituted at most of the same sites. Mutations that substantially destabilize the protein and are located in the carboxy-terminal domain generally slow the rate of folding. Destabilizing mutations in the amino-terminal domain, however, have little effect on the rate of folding. Mutations that have little effect on stability tend to have little effect on the rate, no matter where they are located. These results suggest that, at the rate-limiting step, elements of structure in the C-terminal domain are formed and have a structure similar to that of the fully folded protein. Consistent with this, two variants that somewhat increase the rate of folding (Phe104 --> Met and Val149 --> Met) are located within the carboxy-terminal domain and maintain or improve packing with very little perturbation of the wild-type structure.


    Related Citations: 
    • A Test of the "Jigsaw-Puzzle" Model for Protein Folding by Multiple Methionine Substitutions Within the Core of T4 Lysozyme
      Gassner, N.C., Baase, W.A., Matthews, B.W.
      (1996) Proc Natl Acad Sci U S A 93: 12155
    • Structure of Bacteriophage T4 Lysozyme Refined at 1.7 A Resolution
      Weaver, L.H., Matthews, B.W.
      (1987) J Mol Biol 193: 189

    Organizational Affiliation

    Institute of Molecular Biology, Howard Hughes Medical Institute, and Departments of Chemistry and Physics, 1229 University of Oregon, Eugene, Oregon 97403-1229, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LYSOZYMEA164Escherichia virus T4Mutation(s): 3 
Gene Names: E
EC: 3.2.1.17
Find proteins for P00720 (Enterobacteria phage T4)
Explore P00720 
Go to UniProtKB:  P00720
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 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
CL
Query on CL

Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Work: 0.173 
  • R-Value Observed: 0.173 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.48α = 90
b = 60.48β = 90
c = 97.7γ = 120
Software Package:
Software NamePurpose
TNTrefinement
DENZOdata reduction
TNTphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-11-10
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2014-04-16
    Changes: Other
  • Version 1.4: 2017-10-04
    Changes: Refinement description
  • Version 1.5: 2017-10-11
    Changes: Data collection