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Related Experiment Video

Updated: May 8, 2026

From a Natural Product to Its Biosynthetic Gene Cluster: A Demonstration Using Polyketomycin from Streptomyces diastatochromogenes Tü6028

From a Natural Product to Its Biosynthetic Gene Cluster: A Demonstration Using Polyketomycin from Streptomyces diastatochromogenes Tü6028

Published on: January 13, 2017

Active polyketides isolated from Penicillium herquei.

Andrey M R Marinho¹, Patrícia S B Marinho, Lourivaldo S Santos

¹Faculdade de Química, Universidade Federal do Pará, 66075-110 Belém, PA, Brasil. andrey@ufpa.br

Anais Da Academia Brasileira De Ciencias

|August 24, 2013

Summary

This summary is machine-generated.

Researchers isolated six polyketides from Penicillium herquei, identifying them using NMR and MS. Some compounds demonstrated significant antimicrobial and antileishmanial activity.

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Area of Science:

Natural Product Chemistry
Microbiology
Pharmacology

Background:

* Penicillium species are known sources of diverse bioactive secondary metabolites.
* Polyketides represent a major class of fungal natural products with varied biological activities.
* Leishmania brasiliensis and various bacteria pose significant health challenges requiring novel therapeutic agents.

Purpose of the Study:

* To isolate and characterize polyketides from the fungus Penicillium herquei.
* To evaluate the antimicrobial activity of isolated compounds against pathogenic bacteria.
* To assess the antileishmanial activity of isolated compounds against Leishmania brasiliensis.

Main Methods:

* Isolation of compounds using classical chromatography techniques.
* Structural elucidation of isolated polyketides via 1D and 2D Nuclear Magnetic Resonance (NMR) spectroscopy and Mass Spectrometry (MS).
* In vitro bioassays to determine antimicrobial activity against Escherichia coli, Pseudomonas aeruginosa, and Bacillus subtilis, and antileishmanial activity against Leishmania brasiliensis.

Main Results:

* Six polyketides were successfully isolated and identified: citreorosein (1), emodin (2), janthinone (3), citrinin (4), citrinin H1 (5), and dicitrinol (6).
* Compounds 1 (citreorosein) and 2 (emodin) exhibited good activity against Escherichia coli, Pseudomonas aeruginosa, and Bacillus subtilis.
* Compounds 1 (citreorosein) and 2 (emodin) also showed good activity against the promastigote forms of Leishmania brasiliensis.

Conclusions:

* Penicillium herquei is a source of structurally diverse polyketides.
* Isolated polyketides, particularly citreorosein and emodin, possess promising antimicrobial and antileishmanial properties.
* Further investigation into these compounds may lead to the development of new therapeutic agents.