Inhibitors of amino acids biosynthesis as antifungal agents
Kamila Jastrzębowska1, Iwona Gabriel
1Department of Pharmaceutical Technology and Biochemistry, Gdansk University of Technology, 11/12 Narutowicza Str., 80-233, Gdansk, Poland.
Abstract:
Fungal microorganisms, including the human pathogenic yeast and filamentous fungi, are able to synthesize all proteinogenic amino acids, including nine that are essential for humans. A number of enzymes catalyzing particular steps of human-essential amino acid biosynthesis are fungi specific. Numerous studies have shown that auxotrophic mutants of human pathogenic fungi impaired in biosynthesis of particular amino acids exhibit growth defect or at least reduced virulence under in vivo conditions. Several chemical compounds inhibiting activity of one of these enzymes exhibit good antifungal in vitro activity in minimal growth media, which is not always confirmed under in vivo conditions. This article provides a comprehensive overview of the present knowledge on pathways of amino acids biosynthesis in fungi, with a special emphasis put on enzymes catalyzing particular steps of these pathways as potential targets for antifungal chemotherapy.
Insights
Fungi synthesize essential amino acids using unique enzymes. Inhibiting these fungal-specific enzymes shows promise for developing novel antifungal drugs, though in vivo efficacy requires further study.
Area of Science:
- Biochemistry
- Mycology
- Pharmacology
Background:
- Fungi, including pathogenic yeasts and filamentous fungi, synthesize all proteinogenic amino acids, nine of which are essential for humans.
- Specific enzymes in amino acid biosynthesis pathways are unique to fungi.
- Auxotrophic fungal mutants lacking specific amino acid biosynthesis pathways exhibit reduced growth and virulence in vivo.
Purpose of the Study:
- To provide a comprehensive overview of amino acid biosynthesis pathways in fungi.
- To identify fungal-specific enzymes as potential targets for antifungal chemotherapy.
Main Methods:
- Literature review of fungal amino acid biosynthesis pathways.
- Analysis of fungal-specific enzymes and their roles in fungal growth and virulence.
- Evaluation of existing studies on chemical inhibitors targeting these enzymes.
Main Results:
- Fungal-specific enzymes in essential amino acid biosynthesis are crucial for fungal growth and virulence.
- In vitro studies show antifungal activity of inhibitors targeting these enzymes.
- In vivo antifungal efficacy of these compounds is not always consistent with in vitro results.
Conclusions:
- Fungal amino acid biosynthesis pathways present viable targets for antifungal drug development.
- Further research is needed to optimize the in vivo efficacy of inhibitors targeting these fungal-specific enzymes.
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