1LHM

THE CRYSTAL STRUCTURE OF A MUTANT LYSOZYME C77(SLASH)95A WITH INCREASED SECRETION EFFICIENCY IN YEAST


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Observed: 0.160 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

The crystal structure of a mutant human lysozyme C77/95A with increased secretion efficiency in yeast.

Inaka, K.Taniyama, Y.Kikuchi, M.Morikawa, K.Matsushima, M.

(1991) J Biol Chem 266: 12599-12603

  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The three-dimensional structure of a mutant human lysozyme, C77/95A, in which residues Cys77 and Cys95 were replaced by alanine, was determined at 1.8-A resolution by x-ray crystallography. The properties of this mutant protein have been well charact ...

    The three-dimensional structure of a mutant human lysozyme, C77/95A, in which residues Cys77 and Cys95 were replaced by alanine, was determined at 1.8-A resolution by x-ray crystallography. The properties of this mutant protein have been well characterized with respect to its thermal stability and secretion efficiency in a yeast expression system. The overall three-dimensional structure of C77/95A was found to be essentially identical to that of the wild-type human lysozyme, although the coordinates were shifted by more than 0.5 A and the thermal factors of the main-chain atoms were increased in the vicinity of residue 77. The reduction in thermal stability of this mutant has been previously explained by an increase in entropy of the unfolded state. In addition, a packing defect (cavity) produced by the removal of the disulfide bond was detected in the three-dimensional structure of C77/95A. This cavity can also be a reason why the stability of the protein is reduced because the free energy of the folded state could be expected to increase. The increased secretion efficiency cannot be due mainly to the three-dimensional structure, but may possibly be related to some event in the pathway of protein secretion. One of the possibilities might involve molecular flexibilities in the secondary or tertiary structure for lack of one of the disulfide bonds.


    Related Citations: 
    • Role of Disulfide Bonds in Folding and Secretion of Human Lysozyme in Saccharomyces Cerevisiae
      Taniyama, Y., Yamamoto, Y., Kikuchi, N.Nakao M., Ikehara, M.
      (1988) Biochem Biophys Res Commun 152: 962

    Organizational Affiliation

    Protein Engineering Research Institute, Osaka, Japan.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HUMAN LYSOZYMEA130Homo sapiensMutation(s): 0 
Gene Names: LYZLZM
EC: 3.2.1.17
Find proteins for P61626 (Homo sapiens)
Explore P61626 
Go to UniProtKB:  P61626
NIH Common Fund Data Resources
PHAROS  P61626
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Observed: 0.160 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 56.61α = 90
b = 60.85β = 90
c = 33.69γ = 90
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1992-04-15
    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