1PUO

Crystal structure of Fel d 1- the major cat allergen


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.201 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The crystal structure of the major cat allergen Fel d 1, a member of the secretoglobin family.

Kaiser, L.Gronlund, H.Sandalova, T.Ljunggren, H.G.van Hage-Hamsten, M.Achour, A.Schneider, G.

(2003) J.Biol.Chem. 278: 37730-37735

  • DOI: 10.1074/jbc.M304740200

  • PubMed Abstract: 
  • The domestic cat (Felis domesticus) is one of the most important causes of allergic asthma worldwide. The dominating cat allergen, Fel d 1, is composed of two heterodimers. Recently, it has been shown that recombinant Fel d 1, consisting of chain 2 a ...

    The domestic cat (Felis domesticus) is one of the most important causes of allergic asthma worldwide. The dominating cat allergen, Fel d 1, is composed of two heterodimers. Recently, it has been shown that recombinant Fel d 1, consisting of chain 2 and chain 1 fused together without additional linker, has immunological properties indistinguishable from the natural heterodimeric protein. Herein, we report the crystal structure of recombinant monomeric Fel d 1 at 1.85-A resolution, determined by multi-wavelength anomalous diffraction using selenomethionine substituted protein. Fel d 1 is an all-helical protein and consists of eight helices. The two halves of the recombinant Fel d 1 molecule, corresponding to the wild-type Fel d 1 chains, are very similar in three-dimensional structure, despite the lack of significant sequence identity. The structure of the Fel d 1 presents a striking similarity to that of uteroglobin, a steroid-inducible cytokine-like molecule with anti-inflammatory and immunomodulatory properties. An internal, asymmetric cavity is formed in the Fel d 1 that could bind an endogenous ligand. The distribution of residues lining this cavity suggests that such a ligand must be amphipathic. The structure of Fel d 1 displays the localization of three previously defined Fel d 1 IgE epitopes on the surface of the protein. The three-dimensional structure provides a framework for rational design of hypoallergenic mutants aimed for treatment of cat allergy.


    Related Citations: 
    • Production, crystallization and preliminary crystallographic study of the major cat allergen Fel d 1.
      Kaiser, L.,Gronlund, H.,Sandalova, T.,Ljunggren, H.G.,Schneider, G.,Van Hage-Hamsten, M.,Achour, A.
      (2003) Acta Crystallogr.,Sect.D 59: 1103


    Organizational Affiliation

    Department of Medicine, Unit of Clinical Immunology and Allergy, Karolinska Institutet and Hospital L2:04, S-171 76 Stockholm, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Major allergen I polypeptide, fused chain 2, chain 1
A, B
170Felis catusMutation(s): 0 
Gene Names: CH2, CH1
Find proteins for P30440 (Felis catus)
Go to UniProtKB:  P30440
Find proteins for P30438 (Felis catus)
Go to UniProtKB:  P30438
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MPD
Query on MPD

Download SDF File 
Download CCD File 
A, B
(4S)-2-METHYL-2,4-PENTANEDIOL
C6 H14 O2
SVTBMSDMJJWYQN-YFKPBYRVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.237 
  • R-Value Work: 0.201 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 43.290α = 90.00
b = 51.539β = 95.27
c = 67.725γ = 90.00
Software Package:
Software NamePurpose
CCP4data scaling
REFMACrefinement
SOLVEphasing
RESOLVEphasing
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-10-14
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-08-02
    Type: Data collection, Refinement description, Source and taxonomy