Crystal structure of Pisum sativum convicilin

Experimental Data Snapshot

  • Resolution: 2.70 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.215 

Starting Model: experimental
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Pea and lentil 7S globulin crystal structures with comparative immunoglobulin epitope mapping.

Robinson, K.A.St-Jacques, A.D.Bakestani, I.D.Beavington, B.A.G.Loewen, M.C.

(2022) Food Chem (Oxf) 5: 100146-100146

  • DOI: https://doi.org/10.1016/j.fochms.2022.100146
  • Primary Citation of Related Structures:  
    7U1H, 7U1I, 7U1J

  • PubMed Abstract: 

    Legumes represent an affordable high protein, nutrient dense food source. However, the vast majority of legume crops contain proteins that are known allergens for susceptible individuals. These include proteins from the 7S globulin family, which comprise a vast majority of seed storage proteins. Here, the crystal structures of 7S globulins from Pisum sativum L. (pea) and Lens culinaris Medicus (lentil) are presented for the first time, including pea vicillin and convicilin, and lentil vicilin. All three structures maintain the expected 7S globulin fold, with trimeric quaternary structure and monomers comprised of β-barrel N- and C-modules. The potential impact of sequence differences on structure and packing in the different crystal space groups is noted, with potential relevance to packing upon seed deposition. Mapping on the obtained crystal structures highlights significant Ig epitope overlap between pea, lentil, peanut and soya bean and significant coverage of the entire seed storage protein, emphasizing the challenge in addressing food allergies. How recently developed biologicals might be refined to be more effective, or how these seed storage proteins might be modified in planta to be less immuno-reactive remain challenges for the future. With legumes representing an affordable, high protein, nutrient dense food source, this work will enable important research in the context of global food security and human health on an ongoing basis.

  • Organizational Affiliation

    Aquatic and Crop Resources Development Research Center, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C
413Pisum sativumMutation(s): 0 
Gene Names: cvc
Find proteins for Q9M3X6 (Pisum sativum)
Explore Q9M3X6 
Go to UniProtKB:  Q9M3X6
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9M3X6
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.70 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.215 
  • Space Group: F 2 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 269.155α = 90
b = 269.155β = 90
c = 269.155γ = 90
Software Package:
Software NamePurpose
Cootmodel building
DIALSdata reduction
DIALSdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Other governmentCanada--

Revision History  (Full details and data files)

  • Version 1.0: 2022-03-30
    Type: Initial release
  • Version 1.1: 2022-12-07
    Changes: Database references
  • Version 1.2: 2023-01-11
    Changes: Database references
  • Version 1.3: 2023-10-25
    Changes: Data collection, Refinement description