Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 25.67 kDa 
• Atom Count: 2038 
• Modelled Residue Count: 212 
• Deposited Residue Count: 218 
• Unique protein chains: 1

5N18

Second Bromodomain (BD2) from Candida albicans Bdf1 bound to an imidazopyridine (compound 2)

• PDB DOI: 10.2210/pdb5N18/pdb

• Classification: TRANSCRIPTION
• Organism(s): Candida albicans SC5314
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2017-02-05 Released: 2017-05-31 
• Deposition Author(s): Mietton, F., Ferri, E., Champleboux, M., Zala, N., Maubon, D., Zhou, Y., Harbut, M., Spittler, D., Garnaud, C., Courcon, M., Chauvel, M., d'Enfert, C., Kashemirov, B.A., Hull, M., Cornet, M., McKenna, C.E., Govin, J., Petosa, C.
• Funding Organization(s): French National Research Agency

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.198 
• R-Value Work: 0.159 
• R-Value Observed: 0.161 

Literature

Selective BET bromodomain inhibition as an antifungal therapeutic strategy.

Mietton, F., Ferri, E., Champleboux, M., Zala, N., Maubon, D., Zhou, Y., Harbut, M., Spittler, D., Garnaud, C., Courcon, M., Chauvel, M., d'Enfert, C., Kashemirov, B.A., Hull, M., Cornet, M., McKenna, C.E., Govin, J., Petosa, C.

(2017) Nat Commun 8: 15482-15482

• PubMed: 28516956 
• DOI: 10.1038/ncomms15482
• Primary Citation of Related Structures:  
  5N13, 5N15, 5N16, 5N17, 5N18


• PubMed Abstract: 
  

Invasive fungal infections cause significant morbidity and mortality among immunocompromised individuals, posing an urgent need for new antifungal therapeutic strategies. Here we investigate a chromatin-interacting module, the bromodomain (BD) from the BET family of proteins, as a potential antifungal target in Candida albicans, a major human fungal pathogen. We show that the BET protein Bdf1 is essential in C. albicans and that mutations inactivating its two BDs result in a loss of viability in vitro and decreased virulence in mice. We report small-molecule compounds that inhibit C. albicans Bdf1 with high selectivity over human BDs. Crystal structures of the Bdf1 BDs reveal binding modes for these inhibitors that are sterically incompatible with the human BET-binding pockets. Furthermore, we report a dibenzothiazepinone compound that phenocopies the effects of a Bdf1 BD-inactivating mutation on C. albicans viability. These findings establish BET inhibition as a promising antifungal therapeutic strategy and identify Bdf1 as an antifungal drug target that can be selectively inhibited without antagonizing human BET function.

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Organizational Affiliation: 

Institut de Biologie Structurale (IBS), Université de Grenoble Alpes, CEA, CNRS, 38044 Grenoble, France.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Bromodomain-containing factor 1	A, B	109	Candida albicans SC5314	Mutation(s): 0  Gene Names: BDF1, CaO19.8593, CaO19.978, CAALFM_C500200CA
UniProt
Find proteins for Q5A4W8 (Candida albicans (strain SC5314 / ATCC MYA-2876)) Explore Q5A4W8  Go to UniProtKB:  Q5A4W8

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
8HZ	C [auth A]	4-[8-methyl-3-[(4-methylphenyl)amino]imidazo[1,2-a]pyridin-2-yl]phenol C21 H19 N3 O KPRSGDIGCGTRAS-UHFFFAOYSA-N
GOL	D [auth B]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
8HZ	Binding MOAD:  5N18	Kd: 2100 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 0.198 
• R-Value Work: 0.159 
• R-Value Observed: 0.161 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 46.484	α = 90
b = 35.997	β = 107.61
c = 64.495	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2017-02-05 
• Released Date: 2017-05-31 
Deposition Author(s): Mietton, F., Ferri, E., Champleboux, M., Zala, N., Maubon, D., Zhou, Y., Harbut, M., Spittler, D., Garnaud, C., Courcon, M., Chauvel, M., d'Enfert, C., Kashemirov, B.A., Hull, M., Cornet, M., McKenna, C.E., Govin, J., Petosa, C.

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Funding Organization	Location	Grant Number
French National Research Agency	France	ANR-14-CE16-0027-01

Revision History  

• Version 1.0: 2017-05-31
  Type: Initial release
  
• Version 1.1: 2017-06-07
  Changes: Data collection
• Version 2.0: 2017-09-06
  Changes: Atomic model, Author supporting evidence