4XUW | pdb_00004xuw

Structure of the hazelnut allergen, Cor a 8

• PDB DOI: https://doi.org/10.2210/pdb4XUW/pdb

• Classification: ALLERGEN
• Organism(s): Corylus avellana
• Mutation(s): No 


• Deposited: 2015-01-26 Released: 2015-10-14 
• Deposition Author(s): Offermann, L.R., Perdue, M.L., Bublin, M., Pfeifer, S., Dubiela, P., Hoffmann-Sommergruber, K., Chruszcz, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.10 Å
• R-Value Free: 
  0.177 (Depositor), 0.182 (DCC) 
• R-Value Work: 
  0.142 (Depositor), 0.151 (DCC) 
• R-Value Observed: 
  0.144 (Depositor) 

Starting Model: experimental

Literature

Structural and Functional Characterization of the Hazelnut Allergen Cor a 8.

Offermann, L.R., Bublin, M., Perdue, M.L., Pfeifer, S., Dubiela, P., Borowski, T., Chruszcz, M., Hoffmann-Sommergruber, K.

(2015) J Agric Food Chem 63: 9150-9158

• PubMed: 26417906 
• DOI: https://doi.org/10.1021/acs.jafc.5b03534
• Primary Citation Related Structures: 
  4XUW


• PubMed Abstract: 
  

  Nonspecific lipid transfer proteins (nsLTPs) are basic proteins, stabilized by four disulfide bonds, and are expressed throughout the plant kingdom. These proteins are also known as important allergens in fruits and tree nuts. In this study, the nsLTP from hazelnuts, Cor a 8, was purified and its crystal structure determined. The protein is stable at low pH and refolds after thermal denaturation. Molecular dynamics simulations were used to provide an insight into conformational changes of Cor a 8 upon ligand binding. When known epitope areas from Pru p 3 were compared to those of Cor a 8, differences were obvious, which may contribute to limited cross-reactivity between peach and hazelnut allergens. Differences in epitope regions may contribute to limited cross-reactivity between Cor a 8 and nsLTPs from other plant sources. The structure of Cor a 8 represents the first resolved structure of a hazelnut allergen.

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Organizational Affiliation: 
• Department of Chemistry and Biochemistry, University of South Carolina , Columbia, South Carolina 29208, United States.
Department of Chemistry, Davidson College , Davidson, North Carolina 28035, United States.
Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna , Vienna, Austria.
Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences , Kraków, Poland.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 19.07 kDa 
• Atom Count: 1,675 
• Modeled Residue Count: 184 
• Deposited Residue Count: 184 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Non-specific lipid-transfer protein	A, B	92	Corylus avellana	Mutation(s): 0
UniProt
Find proteins for Q9ATH2 (Corylus avellana) Explore Q9ATH2  Go to UniProtKB:  Q9ATH2

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
PO4	C [auth A]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.10 Å
• R-Value Free:  0.177 (Depositor), 0.182 (DCC) 
• R-Value Work:  0.142 (Depositor), 0.151 (DCC) 
• R-Value Observed: 0.144 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 39.678	α = 90
b = 30.816	β = 108.91
c = 56.184	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data scaling
HKL-2000	data collection
HKL-2000	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-10-14 
Deposition Author(s): Offermann, L.R., Perdue, M.L., Bublin, M., Pfeifer, S., Dubiela, P., Hoffmann-Sommergruber, K., Chruszcz, M.

Revision History  

• Version 1.0: 2015-10-14
  Type: Initial release
  
• Version 1.1: 2015-11-04
  Changes: Database references
• Version 1.2: 2023-09-27
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.3: 2024-10-16
  Changes: Structure summary