MBP-fusion protein of the major peanut allergen Ara h 2

Experimental Data Snapshot

  • Resolution: 2.71 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.187 

wwPDB Validation   3D Report Full Report

This is version 2.1 of the entry. See complete history


Ara h 2: crystal structure and IgE binding distinguish two subpopulations of peanut allergic patients by epitope diversity.

Mueller, G.A.Gosavi, R.A.Pomes, A.Wunschmann, S.Moon, A.F.London, R.E.Pedersen, L.C.

(2011) Allergy 66: 878-885

  • DOI: https://doi.org/10.1111/j.1398-9995.2010.02532.x
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Peanut allergy affects 1% of the population and causes the most fatal food-related anaphylactic reactions. The protein Ara h 2 is the most potent peanut allergen recognized by 80-90% of peanut allergic patients.

    Organizational Affiliation

    Laboratory of Structural Biology, National Institute of Environmental Health Sciences, Research Triangle Park, NC, USA. mueller3@niehs.nih.gov

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Maltose ABC transporter periplasmic protein,Arah 2A500Escherichia coliArachis hypogaea
This entity is chimeric
Mutation(s): 7 
Gene Names: HMPREF9530_03068Ara h 2
Find proteins for P0AEX9 (Escherichia coli (strain K12))
Explore P0AEX9 
Go to UniProtKB:  P0AEX9
Find proteins for A5Z1Q8 (Arachis duranensis)
Explore A5Z1Q8 
Go to UniProtKB:  A5Z1Q8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsA5Z1Q8P0AEX9
Protein Feature View
  • Reference Sequence


Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranose-(1-4)-alpha-D-glucopyranoseB 3N/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G96370VA
GlyCosmos:  G96370VA
GlyGen:  G96370VA
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 2
IDChainsNameType/Class2D Diagram3D Interactions
Query on PRD_900009
Balpha-maltotrioseOligosaccharide / Nutrient Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Resolution: 2.71 Å
  • R-Value Free: 0.256 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.187 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.847α = 90
b = 87.381β = 103.93
c = 113.137γ = 90
Software Package:
Software NamePurpose
MAR345data collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-02-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-08-09
    Changes: Refinement description, Source and taxonomy
  • Version 1.3: 2017-11-08
    Changes: Refinement description
  • Version 1.4: 2020-02-26
    Changes: Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary
  • Version 2.1: 2021-02-17
    Changes: Database references, Source and taxonomy, Structure summary