4WMZ

S. cerevisiae CYP51 complexed with fluconazole in the active site


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.200 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.4 of the entry. See complete history


Literature

Structural Insights into Binding of the Antifungal Drug Fluconazole to Saccharomyces cerevisiae Lanosterol 14 alpha-Demethylase.

Sagatova, A.A.Keniya, M.V.Wilson, R.K.Monk, B.C.Tyndall, J.D.

(2015) Antimicrob Agents Chemother 59: 4982-4989

  • DOI: https://doi.org/10.1128/AAC.00925-15
  • Primary Citation of Related Structures:  
    4WMZ

  • PubMed Abstract: 

    Infections by fungal pathogens such as Candida albicans and Aspergillus fumigatus and their resistance to triazole drugs are major concerns. Fungal lanosterol 14α-demethylase belongs to the CYP51 class in the cytochrome P450 superfamily of enzymes. This monospanning bitopic membrane protein is involved in ergosterol biosynthesis and is the primary target of azole antifungal drugs, including fluconazole. The lack of high-resolution structural information for this drug target from fungal pathogens has been a limiting factor for the design of modified triazole drugs that will overcome resistance. Here we report the X-ray structure of full-length Saccharomyces cerevisiae lanosterol 14α-demethylase in complex with fluconazole at a resolution of 2.05 Å. This structure shows the key interactions involved in fluconazole binding and provides insight into resistance mechanisms by revealing a water-mediated hydrogen bonding network between the drug and tyrosine 140, a residue frequently found mutated to histidine or phenylalanine in resistant clinical isolates.


  • Organizational Affiliation

    Sir John Walsh Research Institute, University of Otago, Dunedin, New Zealand.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Lanosterol 14-alpha demethylase539Saccharomyces cerevisiae YJM789Mutation(s): 0 
Gene Names: ERG11SCY_2394
Membrane Entity: Yes 
UniProt
Find proteins for A6ZSR0 (Saccharomyces cerevisiae (strain YJM789))
Explore A6ZSR0 
Go to UniProtKB:  A6ZSR0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA6ZSR0
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download Ideal Coordinates CCD File 
B [auth A]PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
TPF
Query on TPF

Download Ideal Coordinates CCD File 
C [auth A]2-(2,4-DIFLUOROPHENYL)-1,3-DI(1H-1,2,4-TRIAZOL-1-YL)PROPAN-2-OL
C13 H12 F2 N6 O
RFHAOTPXVQNOHP-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.200 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.24α = 90
b = 65.21β = 98.43
c = 81.02γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
Aimlessdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Health Research Council (HRC)New Zealand--
Marsden FundNew Zealand--

Revision History  (Full details and data files)

  • Version 1.0: 2015-07-01
    Type: Initial release
  • Version 1.1: 2015-07-29
    Changes: Database references
  • Version 1.2: 2017-09-20
    Changes: Data collection, Database references, Derived calculations, Source and taxonomy
  • Version 1.3: 2020-01-01
    Changes: Author supporting evidence
  • Version 1.4: 2023-09-27
    Changes: Data collection, Database references, Refinement description