4LEE

Structure of the Als3 adhesin from Candida albicans, residues 1-313 (mature sequence), triple mutant in the binding cavity: K59M, A116V, Y301F


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Peptide-binding Cavity Is Essential for Als3-mediated Adhesion of Candida albicans to Human Cells.

Lin, J.Oh, S.H.Jones, R.Garnett, J.A.Salgado, P.S.Rusnakova, S.Matthews, S.J.Hoyer, L.L.Cota, E.

(2014) J.Biol.Chem. 289: 18401-18412

  • DOI: 10.1074/jbc.M114.547877
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The adhesive phenotype of Candida albicans contributes to its ability to colonize the host and cause disease. Als proteins are one of the most widely studied C. albicans virulence attributes; deletion of ALS3 produces the greatest reduction in adhesi ...

    The adhesive phenotype of Candida albicans contributes to its ability to colonize the host and cause disease. Als proteins are one of the most widely studied C. albicans virulence attributes; deletion of ALS3 produces the greatest reduction in adhesive function. Although adhesive activity is thought to reside within the N-terminal domain of Als proteins (NT-Als), the molecular mechanism of adhesion remains unclear. We designed mutations in NT-Als3 that test the contribution of the peptide-binding cavity (PBC) to C. albicans adhesion and assessed the adhesive properties of other NT-Als3 features in the absence of a functional PBC. Structural analysis of purified loss-of-PBC-function mutant proteins showed that the mutations did not alter the overall structure or surface properties of NT-Als3. The mutations were incorporated into full-length ALS3 and integrated into the ALS3 locus of a deletion mutant, under control of the native ALS3 promoter. The PBC mutant phenotype was evaluated in assays using monolayers of human pharyngeal epithelial and umbilical vein endothelial cells, and freshly collected human buccal epithelial cells in suspension. Loss of PBC function resulted in an adhesion phenotype that was indistinguishable from the Δals3/Δals3 strain. The adhesive contribution of the Als3 amyloid-forming-region (AFR) was also tested using these methods. C. albicans strains producing cell surface Als3 in which the amyloidogenic potential was destroyed showed little contribution of the AFR to adhesion, instead suggesting an aggregative function for the AFR. Collectively, these results demonstrate the essential and principal role of the PBC in Als3 adhesion.


    Organizational Affiliation

    From the Department of Life Sciences, Imperial College London, Exhibition Road, South Kensington SW7 2AZ, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Agglutinin-like protein 3
A, B, C, D
314Candida albicans (strain SC5314 / ATCC MYA-2876)Mutation(s): 3 
Gene Names: ALS3 (ALS10, ALS8)
Find proteins for Q59L12 (Candida albicans (strain SC5314 / ATCC MYA-2876))
Go to UniProtKB:  Q59L12
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.229 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 112.560α = 90.00
b = 67.090β = 103.55
c = 112.690γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
REFMACrefinement
SCALAdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-05-14
    Type: Initial release
  • Version 1.1: 2014-06-18
    Type: Database references
  • Version 1.2: 2014-07-16
    Type: Database references