Fungi uniquely synthesize lysine through the α-aminoadipate pathway. The saccharopine reductase ScLys9 catalyzes the formation of saccharopine from ɑ-aminoadipate 6-semialdehyde, the seventh step in the lysine biosynthesis pathway in Saccharomyces cerevisiae. Here, we characterized the functions of TrLys9, an ortholog of S. cerevisiae ScLys9 in the industrial filamentous fungus Trichoderma reesei. Transcriptional level analysis indicated that TrLYS9 expression was higher in the conidial stage than in other stages. Disruption of TrLYS9 led to lysine auxotrophy. Phenotype analysis of the ΔTrlys9 mutant showed that TrLYS9 was involved in fungal development including vegetative growth, conidiation, and conidial germination and lysine biosynthesis. Cellulase production was also impaired in the ΔTrlys9 mutant due to the failure of conidial germination in liquid cellulase-inducing medium. Defects in radial growth and asexual development of the ΔTrlys9 mutant were fully recovered when exogenous lysine was added to the medium. These results imply that TrLys9 is involved in fungal development and lysine biosynthesis in T. reesei.
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| Evidence ID | Analyze ID | Gene/Complex | Systematic Name/Complex Accession | Qualifier | Gene Ontology Term ID | Gene Ontology Term | Aspect | Annotation Extension | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Phenotype | Experiment Type | Experiment Type Category | Mutant Information | Strain Background | Chemical | Details | Reference |
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| Evidence ID | Analyze ID | Gene | Gene Systematic Name | Disease Ontology Term | Disease Ontology Term ID | Qualifier | Evidence | Method | Source | Assigned On | Reference |
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| Evidence ID | Analyze ID | Regulator | Regulator Systematic Name | Target | Target Systematic Name | Direction | Regulation of | Happens During | Regulator Type | Direction | Regulation Of | Happens During | Method | Evidence | Strain Background | Reference |
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| Site | Modification | Modifier | Source | Reference |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Allele | Assay | Annotation | Action | Phenotype | SGA score | P-value | Source | Reference | Note |
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| Evidence ID | Analyze ID | Interactor | Interactor Systematic Name | Interactor | Interactor Systematic Name | Assay | Annotation | Action | Modification | Source | Reference | Note |
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| Complement ID | Locus ID | Gene | Species | Gene ID | Strain background | Direction | Details | Source | Reference |
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| Evidence ID | Analyze ID | Dataset | Description | Keywords | Number of Conditions | Reference |
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