skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Evidence of the Involvement of a Cyclase Gene in the Biosynthesis of Ochratoxin A in Aspergillus carbonarius

Journal Article · · Toxins
ORCiD logo [1];  [2];  [3];  [1];  [1]; ORCiD logo [4]; ORCiD logo [1]
  1. National Research Council (CNR), Bari (Italy). Inst. of Sciences of Food Production (ISPA)
  2. National Research Council (CNR), Lecce (Italy). Inst. of Sciences of Food Production (ISPA)
  3. Cranfield Univ. (United Kingdom)
  4. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Joint BioEnergy Institute (JBEI), Emeryville, CA (United States)

Ochratoxin A (OTA) is a well-known mycotoxin with wide distribution in food and feed. Fungal genome sequencing has great utility for identifying secondary metabolites gene clusters for known and novel compounds. A comparative analysis of the OTA-biosynthetic cluster in A. steynii, A. westerdijkiae, A. niger, A. carbonarius, and P. nordicum has revealed a high synteny in OTA cluster organization in five structural genes (otaA, otaB, ota, otaR1, and otaD). Moreover, a recent detailed comparative genome analysis of Aspergilli OTA producers led to the identification of a cyclase gene, otaY, located in the OTA cluster between the otaA and otaB genes, encoding for a predicted protein with high similarity to SnoaLs domain. These proteins have been shown to catalyze ring closure steps in the biosynthesis of polyketide antibiotics produced in Streptomyces. In the present study, we demonstrated an upregulation of the cyclase gene in A. carbonarius under OTA permissive conditions, consistent with the expression trends of the other OTA cluster genes and their role in OTA biosynthesis by complete gene deletion. Our results pointed out the involvement of a cyclase gene in OTA biosynthetic pathway for the first time. They represent a step forward in the understanding of the molecular basis of OTA biosynthesis in A. carbonarius.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1840753
Report Number(s):
PNNL-SA-169400
Journal Information:
Toxins, Vol. 13, Issue 12; ISSN 2072-6651
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

References (43)

Identification and characterization of the polyketide synthase involved in ochratoxin A biosynthesis in Aspergillus carbonarius journal June 2014
Linking secondary metabolites to gene clusters through genome sequencing of six diverse Aspergillus species journal January 2018
Selection is required for efficient Cas9-mediated genome editing in Fusarium graminearum journal February 2018
Functional Role of Aspergillus carbonarius AcOTAbZIP Gene, a bZIP Transcription Factor within the OTA Gene Cluster journal February 2021
Development of the CRISPR/Cas9 System for Targeted Gene Disruption in Aspergillus fumigatus journal November 2015
Classification of Aspergillus, Penicillium, Talaromyces and related genera (Eurotiales): An overview of families, genera, subgenera, sections, series and species journal March 2020
Structure of the polyketide cyclase SnoaL reveals a novel mechanism for enzymatic aldol condensation journal April 2004
Coordinated and Iterative Enzyme Catalysis in Fungal Polyketide Biosynthesis journal August 2016
A new approach to Cas9-based genome editing in Aspergillus niger that is precise, efficient and selectable journal January 2019
Functional Reconstitution of a Fungal Natural Product Gene Cluster by Advanced Genome Editing journal September 2016
The Genomic Regions That Contain Ochratoxin A Biosynthetic Genes Widely Differ in Aspergillus Section Circumdati Species journal November 2020
CRISPR/Cas9 Based Genome Editing of Penicillium chrysogenum journal April 2016
A CRISPR-Cas9 System for Genome Editing of Fusarium proliferatum journal December 2019
Efficient genome editing in Fusarium oxysporum based on CRISPR/Cas9 ribonucleoprotein complexes journal August 2018
A comparison of Agrobacterium-mediated transformation and protoplast-mediated transformation with CRISPR-Cas9 and bipartite gene targeting substrates, as effective gene targeting tools for Aspergillus carbonarius journal April 2017
Occurrence of ochratoxin A in commodities and processed food – A review of EU occurrence data journal January 2005
Genome sequencing and analysis of the versatile cell factory Aspergillus niger CBS 513.88 journal January 2007
The architectures of iterative type I PKS and FAS journal January 2018
CRISPR/Cas9‐based genome engineering: A new breakthrough in the genetic manipulation of filamentous fungi journal November 2020
Efficient gene editing in Neurospora crassa with CRISPR technology journal July 2015
The MaSuRCA genome assembler journal August 2013
Efficient genome editing in filamentous fungus Trichoderma reesei using the CRISPR/Cas9 system journal May 2015
FunGeneClusterS: Predicting fungal gene clusters from genome and transcriptome data journal June 2016
Recent advances on the molecular aspects of ochratoxin A biosynthesis journal October 2017
Quantitative Proteomics Analysis Reveals the Function of the Putative Ester Cyclase UvEC1 in the Pathogenicity of the Rice False Smut Fungus Ustilaginoidea virens journal April 2021
Development of primer sets designed for use with the PCR to amplify conserved genes from filamentous ascomycetes. journal January 1995
Highly efficient CRISPR mutagenesis by microhomology-mediated end joining in Aspergillus fumigatus journal January 2016
Balkan endemic nephropathy: Role of ochratoxins A through biomarkers journal June 2006
Ochratoxin A: 50 Years of Research journal July 2016
Development of a genome editing technique using the CRISPR/Cas9 system in the industrial filamentous fungus Aspergillus oryzae journal December 2015
Determination of Ochratoxin A in Wine and Beer by Immunoaffinity Column Cleanup and Liquid Chromatographic Analysis with Fluorometric Detection: Collaborative Study journal November 2001
Comparative Genomic Analysis of Ochratoxin A Biosynthetic Cluster in Producing Fungi: New Evidence of a Cyclase Gene Involvement journal December 2020
A CRISPR-Cas9 System for Genetic Engineering of Filamentous Fungi journal July 2015
Biosynthetic Cyclization Catalysts for the Assembly of Peptide and Polyketide Natural Products journal April 2021
Effects of temperature and water activity change on ecophysiology of ochratoxigenic Aspergillus carbonarius in field-simulating conditions journal February 2020
Engineering Aspergillus niger for galactaric acid production: elimination of galactaric acid catabolism by using RNA sequencing and CRISPR/Cas9 journal December 2016
Efficient Biosynthesis of Fungal Polyketides Containing the Dioxabicyclo-octane Ring System journal September 2015
Advances in cloning, functional analysis and heterologous expression of fungal polyketide synthase genes journal August 2006
New Insight into the Ochratoxin A Biosynthetic Pathway through Deletion of a Nonribosomal Peptide Synthetase Gene in Aspergillus carbonarius journal September 2012
Ochratoxin A: General Overview and Actual Molecular Status journal March 2010
Establishment of CRISPR/Cas9 in Alternaria alternata journal April 2017
Identification of a Halogenase Involved in the Biosynthesis of Ochratoxin A in Aspergillus carbonarius journal July 2016
MOESM1 of Engineering Aspergillus niger for galactaric acid production: elimination of galactaric acid catabolism by using RNA sequencing and CRISPR/Cas9 dataset January 2016