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 
  • R-Value Observed: 0.203 

wwPDB Validation   3D Report Full Report


This is version 1.4 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
  • Primary Citation of Related Structures:  
    1PUO

  • 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 and chain 1 fused together without additional linker, has immunological properties indistinguishable from the natural heterodimeric protein ...

    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 D Biol Crystallogr 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Major allergen I polypeptide, fused chain 2, chain 1A, B170Felis catusMutation(s): 0 
Gene Names: CH2CH1
Membrane Entity: Yes 
UniProt
Find proteins for P30438 (Felis catus)
Explore P30438 
Go to UniProtKB:  P30438
Find proteins for P30440 (Felis catus)
Explore P30440 
Go to UniProtKB:  P30440
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP30440P30438
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MPD
Query on MPD

Download Ideal Coordinates CCD File 
C [auth A],
D [auth A],
E [auth B],
F [auth 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 
  • R-Value Observed: 0.203 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.29α = 90
b = 51.539β = 95.27
c = 67.725γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
CCP4data scaling
SOLVEphasing
RESOLVEphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-10-14
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-08-02
    Changes: Data collection, Refinement description, Source and taxonomy
  • Version 1.4: 2019-07-03
    Changes: Advisory, Author supporting evidence, Data collection, Derived calculations