Related Experiment Video
Updated: Aug 12, 2026

Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids
Published on: May 4, 2018
Induction and repression of amidase enzymes in Aspergillus nidulans
Abstract:
Aspergillus nidulans can grow on acetamide as both a carbon and nitrogen source and can also grow on formamide as a nitrogen source. Two distinct enzymes, an acetamidase and a formamidase, are produced. The control of the synthesis of these two enzymes in a wild-type strain was investigated. The formamidase is induced by acetamide and formamide and repressed by ammonia. The acetamidase is induced by formamide and acetamide, repressed by carbon metabolites derived from glucose and acetate, and repressed by ammonia. Repression of the acetamidase by ammonia depends on the carbon source; growth on glucose but not on acetate or acetamide allows repression to occur. The pattern of acetamidase repression is compared with that of histidine catabolic enzymes in various bacteria.
More Related Videos
09:21Inhibition of Aspergillus flavus Growth and Aflatoxin Production in Transgenic Maize Expressing the α-amylase Inhibitor from Lablab purpureus L.
Published on: February 15, 2019
11:30Quantitative Analysis of Aspergillus nidulans Growth Rate using Live Microscopy and Open-Source Software
Published on: July 24, 2021
Related Concept Videos
Prokaryotic Transcriptional Activators and Repressors
Transcription of prokaryotic...
Allosteric Proteins-ATCase
Aspartate transcarbamoylase (ATCase) is a cytosolic enzyme that catalyzes the condensation of L-aspartate and carbamoyl phosphate to N-carbamoyl-L-aspartate. This reaction is the first step in pyrimidine biosynthesis. UTP and CTP, the end products of the pyrimidine synthesis pathway,...
Amino Acid Catabolism
Inorganic Nitrogen Assimilation
Inducible Operons: lac Operon
Gene Regulation in Microbial Communities: Quorum Sensing