1KXW

ANALYSIS OF THE STABILIZATION OF HEN LYSOZYME WITH THE HELIX DIPOLE AND CHARGED SIDE CHAINS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.96 Å
  • R-Value Work: 0.168 
  • R-Value Observed: 0.168 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.6 of the entry. See complete history


Literature

Analysis of the stabilization of hen lysozyme by helix macrodipole and charged side chain interaction.

Motoshima, H.Mine, S.Masumoto, K.Abe, Y.Iwashita, H.Hashimoto, Y.Chijiiwa, Y.Ueda, T.Imoto, T.

(1997) J Biochem 121: 1076-1081

  • DOI: https://doi.org/10.1093/oxfordjournals.jbchem.a021697
  • Primary Citation of Related Structures:  
    1KXW, 1KXX, 1KXY, 1RFP

  • PubMed Abstract: 

    In the N-terminal region of the alpha-helix of the c-type lysozymes, two Asx residues exist at the 18th and 27th positions. Hen lysozyme has Asp18/Asn27 (18D/27N), and we prepared three mutant lysozymes, Asn18/Asn27 (18N/27N), Asn18/Asp27 (18N/27D), and Asp18/Asp27 (18D/27D). The stability of the wild-type (18D/27N) lysozyme supported the existence of a hydrogen bond between the side chain of Asp18 and the amide group at the N1 position in the alpha-helix, while the stability of the 18N/27D lysozyme supported the presence of the capping box between the Ser24 (N-cap) and Asp27 residues. Although electrostatic repulsion was observed between Asp18 and Asp27 residues in 18D/27D lysozyme, the dissociation of each residue contributed to stabilizing the B-helix in 18D/27D lysozyme through hydrogen bonding and charge-helix macrodipole interaction. This is the first evidence that two neighboring negative charges at the N-terminus of the helix both increased the stability of the protein.


  • Organizational Affiliation

    Graduate School of Pharmaceutical Sciences, Kyushu University 62, Fukuoka.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
LYSOZYME129Gallus gallusMutation(s): 1 
Gene Names: HEN LYSOZYME
EC: 3.2.1.17
UniProt
Find proteins for P00698 (Gallus gallus)
Explore P00698 
Go to UniProtKB:  P00698
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00698
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.96 Å
  • R-Value Work: 0.168 
  • R-Value Observed: 0.168 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 79.16α = 90
b = 79.16β = 90
c = 37.88γ = 90
Software Package:
Software NamePurpose
PROCESSdata collection
PROCESSdata reduction
X-PLORmodel building
X-PLORrefinement
PROCESSdata scaling
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-11-26
    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: 2018-03-21
    Changes: Data collection, Other
  • Version 1.4: 2021-11-03
    Changes: Database references
  • Version 1.5: 2023-08-09
    Changes: Refinement description
  • Version 1.6: 2024-10-09
    Changes: Data collection, Structure summary