1C7P

CRYSTAL STRUCTURE OF MUTANT HUMAN LYSOZYME WITH FOUR EXTRA RESIDUES (EAEA) AT THE N-TERMINAL


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Effect of extra N-terminal residues on the stability and folding of human lysozyme expressed in Pichia pastoris.

Goda, S.Takano, K.Yamagata, Y.Katakura, Y.Yutani, K.

(2000) Protein Eng. 13: 299-307


  • PubMed Abstract: 
  • A human lysozyme expression system by Pichia pastoris was constructed with the expression vector of pPIC9, which contains the alpha-factor signal peptide known for high secretion efficiency. P. pastoris expressed the human lysozyme at about 300 mg/l ...

    A human lysozyme expression system by Pichia pastoris was constructed with the expression vector of pPIC9, which contains the alpha-factor signal peptide known for high secretion efficiency. P. pastoris expressed the human lysozyme at about 300 mg/l broth, but four extra residues (Glu(-4)-Ala(-3)-Glu(-2)-Ala(-1)-) were added at the N-terminus of the expressed protein (EAEA-lysozyme). To determine the effect of the four extra residues on the stability, structures and folding of the protein, calorimetry, X-ray crystal analysis and GuHCl denaturation experiments were performed. The calorimetric studies showed that the EAEA-lysozyme was destabilized by 9.6 kJ/mol at pH 2.7 compared with the wild-type protein, mainly caused by the substantial decrease in the enthalpy change (DeltaH). On the basis of structural information on the EAEA-lysozyme, thermodynamic analyses show that (1) the addition of the four residues slightly affected the conformation in other parts far from the N-terminus, (2) the large decrease in the enthalpy change due to the conformational changes would be almost compensated by the decrease in the entropy change and (3) the decrease in the Gibbs energy change between the EAEA and wild-type human lysozymes could be explained by the summation of each Gibbs energy change contributing to the stabilizing factors concerning the extra residues.


    Related Citations: 
    • 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


    Organizational Affiliation

    Institute for Protein Research, Osaka University, Yamadaoka, Suita, Osaka 565-0871, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LYSOZYME
A
134Homo sapiensGene 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: 2.4 Å
  • Space Group: P 61 2 2
Unit Cell:
Length (Å)Angle (°)
a = 91.080α = 90.00
b = 91.080β = 90.00
c = 92.730γ = 120.00
Software Package:
Software NamePurpose
X-PLORrefinement
AMoREphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-04-05
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance