Comparative studies of differential expression of chitinolytic enzymes encoded by chiA, chiB, chiC and nagA genes in Aspergillus nidulans
Language English Country United States Media print
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
17455791
DOI
10.1007/bf02931619
Knihovny.cz E-resources
- MeSH
- Acetylglucosamine pharmacology MeSH
- Aspergillus nidulans enzymology genetics physiology MeSH
- Chitinases biosynthesis genetics MeSH
- DNA, Fungal genetics MeSH
- Enzyme Induction MeSH
- Fungal Proteins biosynthesis genetics MeSH
- Phylogeny MeSH
- Oligosaccharides pharmacology MeSH
- Oxidation-Reduction MeSH
- Reactive Oxygen Species metabolism MeSH
- Gene Expression Regulation, Fungal * MeSH
- Carbon metabolism MeSH
- Computational Biology MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Acetylglucosamine MeSH
- Chitinases MeSH
- DNA, Fungal MeSH
- Fungal Proteins MeSH
- Oligosaccharides MeSH
- Reactive Oxygen Species MeSH
- Carbon MeSH
N-Acetyl-D-glucosamine, chito-oligomers and carbon starvation regulated chiA, chiB, and nagA gene expressions in Aspergillus nidulans cultures. The gene expression patterns of the main extracellular endochitinase ChiB and the N-acetyl-beta-D-glucosaminidase NagA were similar, and the ChiB-NagA enzyme system may play a morphological and/or nutritional role during autolysis. Alterations in the levels of reactive oxygen species or in the glutathione-glutathione disulfide redox balance, characteristic physiological changes developing in ageing and autolyzing fungal cultures, did not affect the regulation of either the growth-related chiA or the autolysis-coupled chiB genes although both of them were down-regulated under diamide stress. The transcription of the chiC gene with unknown physiological function was repressed by increased intracellular superoxide concentration.
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