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A regulator gene for acetate utilisation from Neurospora crassa
M Bibbins1, V F Crepin, N J Cummings
1Division of Food Science, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough LE12 5RD, UK.
Molecular Genetics and Genomics : MGG
|July 12, 2002
Summary
Researchers identified a new gene, acu-15, in Neurospora crassa that acts as a transcriptional activator. This gene is crucial for acetate utilization, and mutations impairing it lead to non-utilization.
Area of Science:
- * Molecular biology
- * Genetics
- * Mycology
Background:
- * The regulatory gene facB in Aspergillus nidulans controls acetate utilization.
- * Understanding gene regulation in N. crassa is vital for fungal metabolism research.
Purpose of the Study:
- * To clone and characterize the N. crassa homologue of the A. nidulans facB gene.
- * To investigate the role of this gene in acetate utilization pathways.
Main Methods:
- * Gene cloning and sequencing.
- * Recombinant protein expression and DNA-binding assays.
- * Mutational analysis to assess phenotypic effects.
Main Results:
- * Cloned a novel gene encoding an 865-amino acid transcriptional activator with DNA-binding domains.
- * Identified sequence homology with a known acetate-specific DNA-binding protein complex.
- * Demonstrated recombinant DNA-binding domain recognizes specific promoter sequences.
- * Characterized a duplication mutation (acu-15) causing acetate non-utilization due to inefficient enzyme induction.
Conclusions:
- * The cloned gene, designated acu-15, is a transcriptional activator regulating acetate utilization in N. crassa.
- * The acu-15 gene product plays a critical role in the induction of acetate-utilizing enzymes.
- * This discovery provides new insights into the genetic control of fungal metabolism.