5MMU | pdb_00005mmu

NMR solution structure of the major apple allergen Mal d 1

• PDB DOI: https://doi.org/10.2210/pdb5MMU/pdb
• BMRB: 25968

• Classification: ALLERGEN
• Organism(s): Malus domestica
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2016-12-12 Released: 2017-02-15 
• Deposition Author(s): Ahammer, L., Grutsch, S., Kamenik, A.S., Liedl, K.R., Tollinger, M.
• Funding Organization(s): Austrian Science Fund

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Literature

Structure of the Major Apple Allergen Mal d 1.

Ahammer, L., Grutsch, S., Kamenik, A.S., Liedl, K.R., Tollinger, M.

(2017) J Agric Food Chem 65: 1606-1612

• PubMed: 28161953 
• DOI: https://doi.org/10.1021/acs.jafc.6b05752
• Primary Citation Related Structures: 
  5MMU


• PubMed Abstract: 
  

  More than 70% of birch pollen-allergic patients develop allergic cross-reactions to the major allergen found in apple fruits (Malus domestica), the 17.5 kDa protein Mal d 1. Allergic reactions against this protein result from initial sensitization to the major allergen from birch pollen, Bet v 1. Immunologic cross-reactivity of Bet v 1-specific IgE antibodies with Mal d 1 after apple consumption can subsequently provoke severe oral allergic syndromes. This study presents the three-dimensional NMR solution structure of Mal d 1 (isoform Mal d 1.0101, initially cloned from 'Granny Smith' apples). This protein is composed of a seven-stranded antiparallel β-sheet and three α-helices that form a large internal cavity, similar to Bet v 1 and other cross-reactive food allergens. The Mal d 1 structure provides the basis for elucidating the details of allergic cross-reactivity between birch pollen and apple allergens on a molecular level.

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Organizational Affiliation: 
• Institute of Organic Chemistry, Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck , Innrain 80/82, A-6020 Innsbruck, Austria.
Institute of General, Inorganic and Theoretical Chemistry, Center for Molecular Biosciences Innsbruck (CMBI), University of Innsbruck , Innrain 80/82, A-6020 Innsbruck, Austria.

Biological Assembly 1  

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

Biological assembly 1 generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 17.54 kDa 
• Atom Count: 1,239 
• Modeled Residue Count: 158 
• Deposited Residue Count: 158 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Major allergen Mal d 1	A	158	Malus domestica	Mutation(s): 0  Gene Names: MALD1
UniProt
Find proteins for P43211 (Malus domestica) Explore P43211  Go to UniProtKB:  P43211

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 100 
• Conformers Submitted: 20 
• Selection Criteria: structures with the lowest energy 

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2017-02-15 
Deposition Author(s): Ahammer, L., Grutsch, S., Kamenik, A.S., Liedl, K.R., Tollinger, M.

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Funding Organization	Location	Grant Number
Austrian Science Fund	Austria	P26849

Revision History  

• Version 1.0: 2017-02-15
  Type: Initial release
  
• Version 1.1: 2017-03-15
  Changes: Database references
• Version 1.2: 2017-09-06
  Changes: Author supporting evidence, Derived calculations
• Version 1.3: 2019-05-08
  Changes: Data collection
• Version 1.4: 2024-05-15
  Changes: Data collection, Database references