5EGW

2.70 A crystal structure of the Amb a 11 cysteine protease, a major ragweed pollen allergen, in its proform


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.181 

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This is version 1.2 of the entry. See complete history


Literature

Structural and Functional Characterization of the Major Allergen Amb a 11 from Short Ragweed Pollen.

Groeme, R.Airouche, S.Kopecny, D.Jaekel, J.Savko, M.Berjont, N.Bussieres, L.Le Mignon, M.Jagic, F.Zieglmayer, P.Baron-Bodo, V.Bordas-Le Floch, V.Mascarell, L.Briozzo, P.Moingeon, P.

(2016) J Biol Chem 291: 13076-13087

  • DOI: 10.1074/jbc.M115.702001
  • Primary Citation of Related Structures:  
    5EF4, 5EGW

  • PubMed Abstract: 
  • Allergy to the short ragweed (Ambrosia artemisiifolia) pollen is a major health problem. The ragweed allergen repertoire has been recently expanded with the identification of Amb a 11, a new major allergen belonging to the cysteine protease family. To better characterize Amb a 11, a recombinant proform of the molecule with a preserved active site was produced in Escherichia coli, refolded, and processed in vitro into a mature enzyme ...

    Allergy to the short ragweed (Ambrosia artemisiifolia) pollen is a major health problem. The ragweed allergen repertoire has been recently expanded with the identification of Amb a 11, a new major allergen belonging to the cysteine protease family. To better characterize Amb a 11, a recombinant proform of the molecule with a preserved active site was produced in Escherichia coli, refolded, and processed in vitro into a mature enzyme. The enzymatic activity is revealed by maturation following an autocatalytic processing resulting in the cleavage of both N- and C-terminal propeptides. The 2.05-Å resolution crystal structure of pro-Amb a 11 shows an overall typical C1A cysteine protease fold with a network of molecular interactions between the N-terminal propeptide and the catalytic triad of the enzyme. The allergenicity of Amb a 11 was confirmed in a murine sensitization model, resulting in airway inflammation, production of serum IgEs, and induction of Th2 immune responses. Of note, inflammatory responses were higher with the mature form, demonstrating that the cysteine protease activity critically contributes to the allergenicity of the molecule. Collectively, our results clearly demonstrate that Amb a 11 is a bona fide cysteine protease exhibiting a strong allergenicity. As such, it should be considered as an important molecule for diagnosis and immunotherapy of ragweed pollen allergy.


    Organizational Affiliation

    From Research and Development, Stallergenes Greer, 92160 Antony, France, pmoingeon@stallergenes.com.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cysteine proteaseA, B385Ambrosia artemisiifoliaMutation(s): 0 
EC: 3.4.22
UniProt
Find proteins for V5LU01 (Ambrosia artemisiifolia)
Explore V5LU01 
Go to UniProtKB:  V5LU01
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.70 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.181 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.45α = 90
b = 89.55β = 90
c = 104.06γ = 90
Software Package:
Software NamePurpose
HKL-2000data scaling
BUSTER-TNTrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-04-27
    Type: Initial release
  • Version 1.1: 2016-05-11
    Changes: Database references
  • Version 1.2: 2016-06-29
    Changes: Database references