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Alveolarin, a novel antifungal polypeptide from the wild mushroom Polyporus alveolaris

Hexiang Wang1, T B Ng, Qinghong Liu

  • 1State Key Laboratory of Agrobiotechnology, Beijing and Department of Microbiology, College of Biological Science, Chain Agricultural University, Beijing, China.

Peptides
|May 29, 2004
PubMed

Insights

Researchers isolated a novel antifungal polypeptide, named alveolarin, from the mushroom Polyporus alveolaris. This compound effectively inhibited the mycelial growth of several plant pathogenic fungi.

Area of Science:

  • Mycology
  • Biochemistry
  • Plant Pathology

Background:

  • Fungal infections pose significant threats to agriculture and human health.
  • The identification of novel antifungal compounds is crucial for developing new therapeutic and agricultural strategies.
  • Mushrooms are a known source of bioactive compounds with potential medicinal properties.

Purpose of the Study:

  • To isolate and characterize an antifungal polypeptide from the mushroom Polyporus alveolaris.
  • To evaluate the antifungal activity of the isolated polypeptide against key plant pathogenic fungi.

Main Methods:

  • Isolation of the antifungal polypeptide using a multi-step chromatographic procedure: ion exchange chromatography (DEAE-cellulose), affinity chromatography (Affi-gel blue gel), and gel filtration (Superdex 75 FPLC).
  • Determination of molecular mass using gel filtration (28 kDa) and SDS-PAGE (14 kDa).
  • Assessment of antifungal activity against Botrytis cinerea, Fusarium oxysporum, Mycosphaerella arachidicola, and Physalospora piricola.

Main Results:

  • An antifungal polypeptide, designated alveolarin, was successfully isolated from Polyporus alveolaris.
  • Alveolarin exhibited significant inhibitory effects on the mycelial growth of the tested fungal species.
  • The polypeptide showed distinct molecular masses under different conditions, suggesting potential oligomeric forms or specific structural properties.

Conclusions:

  • Alveolarin is a novel antifungal polypeptide isolated from Polyporus alveolaris with potent activity against important plant pathogens.
  • This discovery highlights the potential of mushroom-derived compounds as a source for new antifungal agents.
  • Further research into alveolarin's mechanism of action and efficacy is warranted for agricultural and potential therapeutic applications.

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