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The isolation of Ant1, a transposable element from Aspergillus niger
D C Glayzer1, I N Roberts, D B Archer
1Norwich Molecular Plant Pathology Group, School of Biological Sciences, University of East Anglia, Norwich Research Park, UK.
Molecular & General Genetics : MGG
|December 10, 1995
Summary
Researchers identified a novel transposable element, Ant1, in the fungus Aspergillus niger. This DNA transposon is related to the Tc1/mariner family and is present as a single copy in strain N402.
Area of Science:
- Microbiology
- Molecular Biology
- Genetics
Background:
- Aspergillus niger is an industrially significant fungus.
- Transposable elements (TEs) are mobile genetic sequences that can alter genome structure and gene expression.
- Understanding TE activity is crucial for fungal genetics and biotechnology.
Purpose of the Study:
- To isolate and characterize a novel transposable element from Aspergillus niger.
- To determine the relationship of the new element to known transposon families.
- To investigate the insertion characteristics and genomic location of the element.
Main Methods:
- Isolation and sequencing of a transposable element from Aspergillus niger.
- Bioinformatic analysis to identify open reading frames (ORFs) and sequence homology.
- Comparative analysis with known transposon families, particularly the Tc1/mariner group.
Main Results:
- A novel DNA transposon, named Ant1 (Aspergillus niger transposon 1), was isolated.
- Ant1 is 4798 bp long with imperfect inverted terminal repeats (ITRs).
- Ant1 contains an ORF similar to Tc1/mariner transposases and shows homology to the A. niger amyA gene, inserting at TA sites and duplicating the target sequence.
Conclusions:
- Ant1 is a novel member of the Tc1/mariner class of DNA transposons.
- The element is present as a single copy in the investigated A. niger strain (N402).
- Characterization of Ant1 provides insights into genome dynamics in Aspergillus niger.