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.

Amino Acids
|November 20, 2014
PubMed

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.

Related Concept Videos

Antifungal Agents01:15

Antifungal Agents

Amphotericin B is a broad-spectrum antifungal agent that exploits structural differences between fungal and mammalian cell membranes. Its amphipathic structure—featuring a hydrophobic polyene-lactone ring and a hydrophilic region containing mycosamine and carboxylic acid groups—enables selective binding to ergosterol, a sterol predominantly found in fungal plasma membranes. This selective interaction underlies the drug’s antifungal activity, although weak binding to...
106
Inhibitors of Bacterial Protein Synthesis01:25

Inhibitors of Bacterial Protein Synthesis

Aminoglycosides constitute a highly potent class of bactericidal antibiotics that exert their antimicrobial effects by targeting the bacterial ribosome, specifically disrupting protein synthesis. These polycationic molecules consist of amino-modified sugars linked via glycosidic bonds to an aminocyclitol core such as 2-deoxystreptamine or streptamine. Their strong positive charges facilitate tight binding to the negatively charged phosphate backbone of ribosomal RNA (rRNA), primarily at the 16S...
82
Inhibitors of Viral Protein Synthesis01:30

Inhibitors of Viral Protein Synthesis

Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
47
Inhibitors of Gram-positive Cell Wall Synthesis01:23

Inhibitors of Gram-positive Cell Wall Synthesis

Bacterial cell walls are typically rigid structures composed mainly of peptidoglycan, a mesh-like polymer that provides mechanical strength and maintains cell shape. The synthesis of peptidoglycan is a crucial process in bacterial growth and serves as a primary target for many antibiotics.Mechanism of Action of Beta-Lactam AntibioticsBeta-lactam antibiotics, such as penicillin, inhibit peptidoglycan synthesis in actively growing cells. These antibiotics share a characteristic four-membered...
131
Anthelminthic Agents01:15

Anthelminthic Agents

Anthelmintic drugs differ significantly from antiparasitic therapies targeting protozoa, primarily due to differences in parasite biology. Whereas most protozoal treatments act on proliferating cells, anthelmintics are typically directed against mature, nonproliferative helminths. The therapeutic approach considers the helminth's reliance on neuromuscular coordination, glucose metabolism, and microtubular integrity for survival, reproduction, and localization within the host. Most anthelmintics...
90
Antimicrobial Proteins01:23

Antimicrobial Proteins

Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
15.6K