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Ammonium Ions Induce Cellulase Synthesis in Trichoderma koningii.
Lirong Xiang1,2, Yuanshan Lin3, Yun Tian2
1College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, 410128, China.
Current Microbiology
|July 2, 2021
Summary
Ammonium ions (NH4+) can induce cellulase production in T. koningii, enhancing enzyme synthesis and efficiency. This discovery offers new strategies for improving biofuel production and addressing the energy crisis.
Area of Science:
- Biotechnology
- Enzyme Engineering
- Industrial Microbiology
Background:
- Cellulase is crucial for sustainable energy solutions but faces challenges in yield and efficiency.
- Optimizing cellulase production is key to unlocking its potential in biofuel applications.
Purpose of the Study:
- To investigate the effect of ammonium ion (NH4+) on cellulase synthesis in T. koningii AS3.2774.
- To identify novel genes involved in NH4+-induced cellulase production.
Main Methods:
- Culturing T. koningii AS3.2774 with NH4+.
- Analyzing mycelial morphology and transport vesicles.
- Utilizing transcriptomic analysis to identify differentially expressed genes (DEGs).
Main Results:
- NH4+ significantly induced cellulase production through mechanisms distinct from typical nitrogen sources.
- Observed increased transport vesicles in NH4+-treated mycelia.
- Identified up-regulation of genes related to CBHI, CBHII, glycoside hydrolase family 5, Hap2/3/5 complexes, ribosome biogenesis, and heme binding, with DEGs primarily in metabolism.
Conclusions:
- NH4+ induces cellulase production at both morphological and gene expression levels in T. koningii.
- The process involves the Hap2/3/5 complex, ribosomes, and metabolic pathways like amino acid, pyruvate, and glycolysis/gluconeogenesis.
- Findings provide insights into the regulatory network of cellulase gene expression in filamentous fungi.
