5LN8

Crystal structure of self-complemented MyfA, the major subunit of Myf fimbriae from Yersinia enterocolitica, in complex with galactose


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.174 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Structural basis for Myf and Psa fimbriae-mediated tropism of pathogenic strains of Yersinia for host tissues.

Pakharukova, N.Roy, S.Tuittila, M.Rahman, M.M.Paavilainen, S.Ingars, A.K.Skaldin, M.Lamminmaki, U.Hard, T.Teneberg, S.Zavialov, A.V.

(2016) Mol Microbiol 102: 593-610

  • DOI: https://doi.org/10.1111/mmi.13481
  • Primary Citation of Related Structures:  
    5LN4, 5LN8, 5LND, 5LO7

  • PubMed Abstract: 

    Three pathogenic species of the genus Yersinia assemble adhesive fimbriae via the FGL-chaperone/usher pathway. Closely related Y. pestis and Y. pseudotuberculosis elaborate the pH6 antigen (Psa), which mediates bacterial attachment to alveolar cells of the lung. Y. enterocolitica, instead, assembles the homologous fimbriae Myf of unknown function. Here, we discovered that Myf, like Psa, specifically recognizes β1-3- or β1-4-linked galactose in glycosphingolipids, but completely lacks affinity for phosphatidylcholine, the main receptor for Psa in alveolar cells. The crystal structure of a subunit of Psa (PsaA) complexed with choline together with mutagenesis experiments revealed that PsaA has four phosphatidylcholine binding pockets that enable super-high-avidity binding of Psa-fibres to cell membranes. The pockets are arranged as six tyrosine residues, which are all missing in the MyfA subunit of Myf. Conversely, the crystal structure of the MyfA-galactose complex revealed that the galactose-binding site is more extended in MyfA, enabling tighter binding to lactosyl moieties. Our results suggest that during evolution, Psa has acquired a tyrosine-rich surface that enables it to bind to phosphatidylcholine and mediate adhesion of Y. pestis/pseudotuberculosis to alveolar cells, whereas Myf has specialized as a carbohydrate-binding adhesin, facilitating the attachment of Y. enterocolitica to intestinal cells.


  • Organizational Affiliation

    Department of Chemistry, University of Turku, Turku, Joint Biotechnology Laboratory, Arcanum, Vatselankatu 2, Turku, 20500, Finland.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Fimbrial protein MyfA,Fimbrial protein MyfA
A, B
131Yersinia enterocoliticaMutation(s): 0 
Gene Names: myfA
UniProt
Find proteins for P33406 (Yersinia enterocolitica)
Explore P33406 
Go to UniProtKB:  P33406
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP33406
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
GAL
Query on GAL

Download Ideal Coordinates CCD File 
C [auth A]beta-D-galactopyranose
C6 H12 O6
WQZGKKKJIJFFOK-FPRJBGLDSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.65 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.173 
  • R-Value Observed: 0.174 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.84α = 90
b = 41.93β = 90
c = 151.14γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
MOSFLMdata collection
SCALAdata scaling
PHASERphasing
PDB_EXTRACTdata extraction
SCALAdata reduction
PHENIXmodel building

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Academy of FinlandFinland140959
Academy of FinlandFinland273075

Revision History  (Full details and data files)

  • Version 1.0: 2016-08-24
    Type: Initial release
  • Version 1.1: 2016-11-30
    Changes: Database references
  • Version 1.2: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary
  • Version 1.3: 2024-01-10
    Changes: Data collection, Database references, Refinement description, Structure summary