1C43

MUTANT HUMAN LYSOZYME WITH FOREIGN N-TERMINAL RESIDUES


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Work: 0.164 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Effect of foreign N-terminal residues on the conformational stability of human lysozyme.

Takano, K.Tsuchimori, K.Yamagata, Y.Yutani, K.

(1999) Eur.J.Biochem. 266: 675-682

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • To minutely understand the effect of foreign N-terminal residues on the conformational stability of human lysozyme, five mutant proteins were constructed: two had Met or Ala in place of the N-terminal Lys residue (K1M and K1A, respectively), and othe ...

    To minutely understand the effect of foreign N-terminal residues on the conformational stability of human lysozyme, five mutant proteins were constructed: two had Met or Ala in place of the N-terminal Lys residue (K1M and K1A, respectively), and others had one additional residue, Met, Gly or Pro, to the N-terminal Lys residue (Met(-1), Gly(-1) and Pro(-1), respectively). The thermodynamic parameters for denaturation of these mutant proteins were examined by differential scanning calorimetry and were compared with that of the wild-type protein. Three mutants with the extra residue were significantly destabilized: the changes in unfolding Gibbs energy (DeltaDeltaG) were -9.1 to -12.2 kJ.mol-1. However, the stability of two single substitutions at the N-terminal slightly decreased; the DeltaDeltaG values were only -0.5 to -2.5 kJ.mol-1. The results indicate that human lysozyme is destabilized by an expanded N-terminal residue. The crystal structural analyses of K1M, K1A and Gly(-1) revealed that the introduction of a residue at the N-terminal of human lysozyme caused the destruction of hydrogen bond networks with ordered water molecules, resulting in the destabilization of the protein.


    Related Citations: 
    • Contribution of Hydrophobic Residues to the Stability of Human Lysozyme: Calorimetric Studies and X-Ray Structural Analysis of the Five Isoleucine to Valine Mutants
      Takano, K.,Ogasawaha, K.,Kaneda, H.,Yamagata, Y.,Fujii, S.,Kanaya, E.,Kikuchi, M.,Oobatake, M.,Yutani, K.
      (1995) J.Mol.Biol. 254: 62


    Organizational Affiliation

    Institute for Protein Research, Osaka University, Yamadaoka, Suita, Osaka, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (HUMAN LYSOZYME)
A
130Homo sapiensMutation(s): 1 
Gene Names: LYZ (LZM)
EC: 3.2.1.17
Find proteins for P61626 (Homo sapiens)
Go to Gene View: LYZ
Go to UniProtKB:  P61626
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Work: 0.164 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 56.767α = 90.00
b = 60.981β = 90.00
c = 33.772γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-08-20
    Type: Initial release
  • Version 1.1: 2008-04-26
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-04
    Type: Refinement description