1IR7

IM mutant of lysozyme


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Work: 0.174 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Tolerance of point substitution of methionine for isoleucine in hen egg white lysozyme.

Ohmura, T.Ueda, T.Hashimoto, Y.Imoto, T.

(2001) Protein Eng. 14: 421-425

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • X-ray structure determination of proteins by using the multiple-wavelength anomalous dispersion method targeting selenomethionine is now widely employed. Isoleucine was examined for the second choice of the substitution of methionine next to leucine. ...

    X-ray structure determination of proteins by using the multiple-wavelength anomalous dispersion method targeting selenomethionine is now widely employed. Isoleucine was examined for the second choice of the substitution of methionine next to leucine. We performed a systematic mutational study of the substitutions of methionine for isoleucine. All mutated lysozymes were less stable than the wild-type by about 1 kcal/mol and it is suggested that this instability was caused by the change in residual hydrophobicity from isoleucine to methionine. The X-ray structures of all mutant lysozymes were very similar to that of the wild-type. In addition, both the accessible surface areas and the conformation of the side chain of methionine in all mutant lysozymes were similar to those of the side chain at the respective isoleucine in the wild-type. Therefore, it is suggested that the mutation from isoleucine to methionine in a protein can be considered as a "safe" substitution.


    Organizational Affiliation

    Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
lysozyme
A
129Gallus gallusMutation(s): 1 
Gene Names: LYZ
EC: 3.2.1.17
Find proteins for P00698 (Gallus gallus)
Go to Gene View: LYZ
Go to UniProtKB:  P00698
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Work: 0.174 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 78.930α = 90.00
b = 78.930β = 90.00
c = 38.090γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORmodel building
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-10-03
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-04
    Type: Refinement description