Cited by 459Antifungal resistance and susceptibilityFungal Plant Pathogen ControlMicrobial Natural Products and Biosynthesis

Structural analyses of Candida albicans sterol 14α-demethylase complexed with azole drugs address the molecular basis of azole-mediated inhibition of fungal sterol biosynthesis

Open access
Hargrove, Tatiana Y., Friggeri, Laura, Wawrzak, Zdzislaw, Qi, Aidong, Hoekstra, William J., Schotzinger, Robert J., York, John D., Guengerich, F. Peter +1 more·2017·Journal of Biological Chemistry

Abstract

With some advances in modern medicine (such as cancer chemotherapy, broad exposure to antibiotics, and immunosuppression), the incidence of opportunistic fungal pathogens such as Candida albicans has increased. Cases of drug resistance among these pathogens have become more frequent, requiring the development of new drugs and a better understanding of the targeted enzymes. Sterol 14α-demethylase (CYP51) is a cytochrome P450 enzyme required for biosynthesis of sterols in eukaryotic cells and is the major target of clinical drugs for managing fungal pathogens, but some of the CYP51 key features important for rational drug design have remained obscure. We report the catalytic properties, ligand-binding profiles, and inhibition of enzymatic activity of C. albicans CYP51 by clinical antifungal drugs that are used systemically (fluconazole, voriconazole, ketoconazole, itraconazole, and posaconazole) and topically (miconazole and clotrimazole) and by a tetrazole-based drug candidate, VT-1161 (oteseconazole: ( R )-2-(2,4-difluorophenyl)-1,1-difluoro-3-(1 H -tetrazol-1-yl)-1-(5-(4-(2,2,2-trifluoroethoxy)phenyl)pyridin-2-yl)propan-2-ol). Among the compounds tested, the first-line drug fluconazole was the weakest inhibitor, whereas posaconazole and VT-1161 were the strongest CYP51 inhibitors. We determined the X-ray structures of C. albicans CYP51 complexes with posaconazole and VT-1161, providing a molecular mechanism for the potencies of these drugs, including the activity of VT-1161 against Candida krusei and Candida glabrata , pathogens that are intrinsically resistant to fluconazole. Our comparative structural analysis outlines phylum-specific CYP51 features that could direct future rational development of more efficient broad-spectrum antifungals.

Integrity signals

Registry

Crossref · 10.1074/jbc.m117.778308

Cites

57 of 57 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

We couldn’t retrieve this paper’s full text, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Structural analysis of C. albicans Erg11 demonstrated that some substitutions involve residues exposed in the active-site cavity and directly affect azole binding, while others occur on the proximal surface and may indirectly contribute to azole resistance.

    “Structural analysis of C. albicans Erg11 demonstrated that while some substitutions involve residues that are exposed in the active-site cavity (directly affecting azole binding), others occur on the proximal surface of the enzyme and may indirectly contribute to azole resistance (for example, by influencing interactions with cytochrome P450 reductase)11.”

    From Molecular mechanisms governing antifungal drug resistance (2023) · cites this paper as [11]

  • The crystal structure of C. albicans Erg11 has been resolved.

    “the crystal structure of the Erg11 protein of C. albicans has been resolved”
  • Other Erg11 substitutions not predicted to directly interact with azole binding, such as G450E on the fungal CYP51-specific β5-hairpin, may indirectly affect resistance through interaction with cytochrome P450 reductase-Erg11 interactions.

    “other substitutions that are not predicted to directly interact with azole binding, such as the G450E substitution found on the fungal CYP51-specific β5-hairpin, may indirectly affect resistance through interaction with cytochrome P450 reductase–Erg11 interactions.”
  • Some Erg11 substitutions (Y132F/H, K143R, G307S, S405F) are located on the exposed active-site cavity of Erg11 and presumably directly influence or interfere with azole binding.

    “some substitutions, such as Y132F/H, K143R, G307S and S405F, are located on the exposed active-site cavity of the Erg11 protein and presumably directly influence or interfere with azole binding”

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Hargrove, T. Y., Friggeri, L., Wawrzak, Z., Qi, A., Hoekstra, W. J., Schotzinger, R. J., York, J. D., Guengerich, F. P., & Lepesheva, G. I.
Affiliations
  • Vanderbilt University (US)
  • Northwestern University (US)
  • Viamet Pharmaceuticals (United States) (US)
Corresponding author
Lepesheva, Galina I.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2017-04
Volume
292
Issue
16
Pages
6728-6743
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2593598577
Cited by
444
References
57
Citations by year
2026: 67 · 2025: 82 · 2024: 49 · 2023: 64 · 2022: 55 · 2021: 30 · 2020: 39 · 2019: 25 · 2018: 24 · 2017: 9
FWCI
21.04
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institutes of Health (R01 GM067871)
Topics
  • Health Sciences › Medicine › Infectious Diseases › Antifungal resistance and susceptibility
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Fungal Plant Pathogen Control
  • Health Sciences › Medicine › Pharmacology › Microbial Natural Products and Biosynthesis
Keywords
Candida albicans, sterol 14α-demethylase, CYP51, cytochrome P450, azole antifungals, posaconazole, oteseconazole, fluconazole, ketoconazole, voriconazole, itraconazole, miconazole, clotrimazole, fungal sterol biosynthesis, drug resistance, Candida krusei, Candida glabrata, X-ray crystal structure, ligand binding, antifungal drug design
MeSH terms
Animals, Antifungal Agents, Azoles, Candida albicans, Crystallization, Fungal Proteins, Heme, Humans, Kinetics, Ligands, Microbial Sensitivity Tests, Protein Binding, Protein Conformation, Protons, Sterols, Rats, Sterol 14-Demethylase

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review