1GFH

CRYSTAL STRUCTURE OF MUTANT HUMAN LYSOZYME SUBSTITUTED AT THE SURFACE POSITIONS

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Work: 0.169 

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This is version 1.3 of the entry. See complete history. 

Literature

Positive contribution of hydration structure on the surface of human lysozyme to the conformational stability.

Funahashi, J., Takano, K., Yamagata, Y., Yutani, K.

(2002) J.Biol.Chem. 277: 21792-21800

  • DOI: 10.1074/jbc.M110728200
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Water molecules make a hydration structure with the network of hydrogen bonds, covering on the surface of proteins. To quantitatively estimate the contribution of the hydration structure to protein stability, a series of hydrophilic mutant human lyso ...

    Water molecules make a hydration structure with the network of hydrogen bonds, covering on the surface of proteins. To quantitatively estimate the contribution of the hydration structure to protein stability, a series of hydrophilic mutant human lysozymes (Val to Ser, Tyr, Asp, Asn, and Arg) modified at three different positions on the surface, which are located in the alpha-helix (Val-110), the beta-sheet (Val-2), and the loop (Val-74), were constructed. Their thermodynamic parameters of denaturation and crystal structures were examined by calorimetry and by x-ray crystallography at 100 K, respectively. The introduced polar residues made hydrogen bonds with protein atoms and/or water molecules, sometimes changing the hydration structure around the mutation site. Changes in the stability of the mutant proteins can be evaluated by a unique equation that considers the conformational changes resulting from the substitutions. Using this analysis, the relationship between the changes in the stabilities and the hydration structures for mutant human lysozymes substituted on the surface could be quantitatively estimated. The analysis indicated that the hydration structure on protein surface plays an important role in determining the conformational stability of the protein.

    Related Citations: 
    • Contribution of amino acid substitutions at two different interior positions to the conformational stability of human lysozyme
      Funahashi, J.,Takano, K.,Yamagata, Y.,Yutani, K.
      (1999) Protein Eng. 12: 841

    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
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: 0.169 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 56.210α = 90.00
b = 61.220β = 90.00
c = 32.880γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-12-20
    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