4COW

Crystal Structure of Epithelial Adhesin 6 A domain (Epa6A) from Candida glabrata in complex with the T-antigen (Galb1-3GalNAc)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.180 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history


Literature

Structural Hotspots Determine Functional Diversity of the Candida Glabrata Epithelial Adhesin Family

Diderrich, R.Kock, M.Maestre-Reyna, M.Rupp, S.Essen, L.-O.Moesch, H.-U.

(2015) J Biol Chem 290: 19597

  • DOI: 10.1074/jbc.M115.655654
  • Primary Citation of Related Structures:  
    4COU, 4COV, 4COW, 4COY, 4COZ, 4D3W

  • PubMed Abstract: 
  • For host colonization, the human fungal pathogen Candida glabrata is known to utilize a large family of highly related surface-exposed cell wall proteins, the lectin-like epithelial adhesins (Epas). To reveal the structure-function relationships within the entire Epa family, we have performed a large scale functional analysis of the adhesion (A) domains of 17 Epa paralogs in combination with three-dimensional structural studies of selected members with cognate ligands ...

    For host colonization, the human fungal pathogen Candida glabrata is known to utilize a large family of highly related surface-exposed cell wall proteins, the lectin-like epithelial adhesins (Epas). To reveal the structure-function relationships within the entire Epa family, we have performed a large scale functional analysis of the adhesion (A) domains of 17 Epa paralogs in combination with three-dimensional structural studies of selected members with cognate ligands. Our study shows that most EpaA domains exert lectin-like functions and together recognize a wide variety of glycans with terminal galactosides for conferring epithelial cell adhesion. We further identify several conserved and variable structural features within the diverse Epa ligand binding pockets, which affect affinity and specificity. These features rationalize why mere phylogenetic relationships within the Epa family are weak indicators for functional classification and explain how Epa-like adhesins have evolved in C. glabrata and related fungal species.


    Organizational Affiliation

    From the Departments of Genetics and moesch@staff.uni-marburg.de.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
EPITHELIAL ADHESIN 6A267[Candida] glabrata CBS 138Mutation(s): 0 
Gene Names: EPA6CAGL0C00110g
UniProt
Find proteins for Q6FX55 (Candida glabrata (strain ATCC 2001 / CBS 138 / JCM 3761 / NBRC 0622 / NRRL Y-65))
Explore Q6FX55 
Go to UniProtKB:  Q6FX55
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6FX55
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
beta-D-galactopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-galactopyranoseB 2N/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G01534TU
GlyCosmos:  G01534TU
GlyGen:  G01534TU
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download Ideal Coordinates CCD File 
E [auth A],
F [auth A]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
ACT
Query on ACT

Download Ideal Coordinates CCD File 
D [auth A]ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
CA
Query on CA

Download Ideal Coordinates CCD File 
C [auth A]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.177 
  • R-Value Observed: 0.180 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.35α = 90
b = 61.1β = 90
c = 106.61γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-02-18
    Type: Initial release
  • Version 1.1: 2015-07-01
    Changes: Data collection, Database references
  • Version 1.2: 2015-07-08
    Changes: Data collection, Database references
  • Version 1.3: 2015-08-19
    Changes: Database references
  • Version 1.4: 2018-03-07
    Changes: Data collection, Source and taxonomy
  • Version 1.5: 2019-05-08
    Changes: Data collection, Derived calculations, Experimental preparation
  • Version 1.6: 2019-05-22
    Changes: Data collection, Experimental preparation
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Other, Structure summary