6CJL

Candida albicans Hsp90 nucleotide binding domain in complex with radicicol


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.165 
  • R-Value Work: 0.145 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis for species-selective targeting of Hsp90 in a pathogenic fungus.

Whitesell, L.Robbins, N.Huang, D.S.McLellan, C.A.Shekhar-Guturja, T.LeBlanc, E.V.Nation, C.S.Hui, R.Hutchinson, A.Collins, C.Chatterjee, S.Trilles, R.Xie, J.L.Krysan, D.J.Lindquist, S.Porco Jr., J.A.Tatu, U.Brown, L.E.Pizarro, J.Cowen, L.E.

(2019) Nat Commun 10: 402-402

  • DOI: 10.1038/s41467-018-08248-w
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • New strategies are needed to counter the escalating threat posed by drug-resistant fungi. The molecular chaperone Hsp90 affords a promising target because it supports survival, virulence and drug-resistance across diverse pathogens. Inhibitors of hum ...

    New strategies are needed to counter the escalating threat posed by drug-resistant fungi. The molecular chaperone Hsp90 affords a promising target because it supports survival, virulence and drug-resistance across diverse pathogens. Inhibitors of human Hsp90 under development as anticancer therapeutics, however, exert host toxicities that preclude their use as antifungals. Seeking a route to species-selectivity, we investigate the nucleotide-binding domain (NBD) of Hsp90 from the most common human fungal pathogen, Candida albicans. Here we report structures for this NBD alone, in complex with ADP or in complex with known Hsp90 inhibitors. Encouraged by the conformational flexibility revealed by these structures, we synthesize an inhibitor with >25-fold binding-selectivity for fungal Hsp90 NBD. Comparing co-crystals occupied by this probe vs. anticancer Hsp90 inhibitors revealed major, previously unreported conformational rearrangements. These insights and our probe's species-selectivity in culture support the feasibility of targeting Hsp90 as a promising antifungal strategy.


    Organizational Affiliation

    Department of Molecular Genetics, University of Toronto, Toronto, ON, M5G 1M1, Canada. leah.cowen@utoronto.ca.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Heat shock protein 90 homolog
A, B
230Candida albicans SC5314Mutation(s): 0 
Gene Names: HSP90CAALFM_C702030WACaJ7.0234CaO19.13868CaO19.6515
Find proteins for P46598 (Candida albicans (strain SC5314 / ATCC MYA-2876))
Go to UniProtKB:  P46598
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
RDC
Query on RDC

Download CCD File 
A, B
RADICICOL
C18 H17 Cl O6
WYZWZEOGROVVHK-GTMNPGAYSA-N
 Ligand Interaction
MG
Query on MG

Download CCD File 
B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.165 
  • R-Value Work: 0.145 
  • Space Group: P 43
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.1α = 90
b = 73.1β = 90
c = 109.514γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-3000data reduction
HKL-3000data scaling
Cootmodel building
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United States1R01AI120958

Revision History 

  • Version 1.0: 2019-01-30
    Type: Initial release
  • Version 1.1: 2019-02-13
    Changes: Data collection, Database references
  • Version 1.2: 2019-12-18
    Changes: Author supporting evidence