4ASL

Structure of Epa1A in complex with the T-antigen (Gal-b1-3- GalNAc)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.24 Å
  • R-Value Free: 0.155 
  • R-Value Work: 0.117 

wwPDB Validation 3D Report Full Report


This is version 2.0 of the entry. See complete history

Literature

Structural Basis for Promiscuity and Specificity During Candida Glabrata Invasion of Host Epithelia.

Maestre-Reyna, M.Diderrich, R.Veelders, M.S.Eulenburg, G.Kalugin, V.Bruckner, S.Keller, P.Rupp, S.Mosch, H.Essen, L.-O.

(2012) Proc.Natl.Acad.Sci.USA 109: 16864

  • DOI: 10.1073/pnas.1207653109
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The human pathogenic yeast Candida glabrata harbors more than 20 surface-exposed, epithelial adhesins (Epas) for host cell adhesion. The Epa family recognizes host glycans and discriminates between target tissues by their adhesin (A) domains, but a d ...

    The human pathogenic yeast Candida glabrata harbors more than 20 surface-exposed, epithelial adhesins (Epas) for host cell adhesion. The Epa family recognizes host glycans and discriminates between target tissues by their adhesin (A) domains, but a detailed structural basis for ligand-binding specificity of Epa proteins has been lacking so far. In this study, we provide high-resolution crystal structures of the Epa1A domain in complex with different carbohydrate ligands that reveal how host cell mucin-type O-glycans are recognized and allow a structure-guided classification of the Epa family into specific subtypes. Further detailed structural and functional characterization of subtype-switched Epa1 variants shows that specificity is governed by two inner loops, CBL1 and CBL2, involved in calcium binding as well as by three outer loops, L1, L2, and L3. In summary, our study provides the structural basis for promiscuity and specificity of Epa adhesins, which might further contribute to developing anti-adhesive antimycotics and combating Candida colonization.


    Organizational Affiliation

    Biomedical Research Center/Department of Chemistry, Philipps-Universit├Ąt Marburg, D-35032 Marburg, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EPA1P
A
259Candida glabrata (strain ATCC 2001 / CBS 138 / JCM 3761 / NBRC 0622 / NRRL Y-65)Mutation(s): 0 
Gene Names: EPA1
Find proteins for Q6FUW5 (Candida glabrata (strain ATCC 2001 / CBS 138 / JCM 3761 / NBRC 0622 / NRRL Y-65))
Go to UniProtKB:  Q6FUW5
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
GAL
Query on GAL

Download SDF File 
Download CCD File 
A
BETA-D-GALACTOSE
C6 H12 O6
WQZGKKKJIJFFOK-FPRJBGLDSA-N
 Ligand Interaction
NGA
Query on NGA

Download SDF File 
Download CCD File 
A
N-ACETYL-D-GALACTOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-JAJWTYFOSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.24 Å
  • R-Value Free: 0.155 
  • R-Value Work: 0.117 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 74.600α = 89.90
b = 103.900β = 90.00
c = 69.400γ = 89.90
Software Package:
Software NamePurpose
SCALAdata scaling
REFMACrefinement
XDSdata reduction
REFMACphasing
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-17
    Type: Initial release
  • Version 1.1: 2012-11-07
    Type: Database references
  • Version 2.0: 2017-06-14
    Type: Advisory, Atomic model, Derived calculations