Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 33.12 kDa 
• Atom Count: 2717 
• Residue Count: 306 
• Unique protein chains: 2

4LEB

Structure of the Als3 adhesin from Candida albicans, residues 1-299 (mature sequence) in complex with hepta-threonine

• DOI: 10.2210/pdb4LEB/pdb

• Classification: CELL ADHESION
• Organism(s): Candida albicans
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2013-06-25 Released: 2014-05-14 
• Deposition Author(s): Lin, J., Garnett, J.A., Cota, E.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.178 
• R-Value Work: 0.140 
• R-Value Observed: 0.140 

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

• PubMed: 24802757 
• DOI: 10.1074/jbc.M114.547877
• Structures With Same Primary Citation


• 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 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, [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Agglutinin-like protein 3	A	300	Candida albicans	Mutation(s): 0  Gene Names: ALD8, ALS3
Find proteins for O74623 (Candida albicans) Go to UniProtKB:  O74623

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
hepta-threonine	B	7	Candida albicans	Mutation(s): 0
Protein Feature View is not available: No corresponding UniProt sequence found.

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.178 
• R-Value Work: 0.140 
• R-Value Observed: 0.140 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 49.36	α = 90
b = 58.18	β = 114.49
c = 57.18	γ = 90

Software Package:

Software Name	Purpose
MOLREP	phasing
REFMAC	refinement
XDS	data reduction
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-06-25 
• Released Date: 2014-05-14 
Deposition Author(s): Lin, J., Garnett, J.A., Cota, E.

Revision History 

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