A Genomics Based Discovery of Secondary Metabolite Biosynthetic Gene Clusters in Aspergillus Ustus

Overview

Journal PLoS One

Specialties General Medicine
Science

Date 2015 Feb 24

PMID 25706180

Citations 12

Authors

Borui Pi

Dongliang Yu

Fangwei Dai

Xiaoming Song

Congyi Zhu

Hongye Li

Yunsong Yu

Affiliations

Soon will be listed here.

Abstract

Secondary metabolites (SMs) produced by Aspergillus have been extensively studied for their crucial roles in human health, medicine and industrial production. However, the resulting information is almost exclusively derived from a few model organisms, including A. nidulans and A. fumigatus, but little is known about rare pathogens. In this study, we performed a genomics based discovery of SM biosynthetic gene clusters in Aspergillus ustus, a rare human pathogen. A total of 52 gene clusters were identified in the draft genome of A. ustus 3.3904, such as the sterigmatocystin biosynthesis pathway that was commonly found in Aspergillus species. In addition, several SM biosynthetic gene clusters were firstly identified in Aspergillus that were possibly acquired by horizontal gene transfer, including the vrt cluster that is responsible for viridicatumtoxin production. Comparative genomics revealed that A. ustus shared the largest number of SM biosynthetic gene clusters with A. nidulans, but much fewer with other Aspergilli like A. niger and A. oryzae. These findings would help to understand the diversity and evolution of SM biosynthesis pathways in genus Aspergillus, and we hope they will also promote the development of fungal identification methodology in clinic.

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