We screened a set of Saccharomyces cerevisiae deletion mutants for resistance to killer toxin HM-1, which kills susceptible yeasts through inhibiting 1,3-beta-glucan synthase. By using HM-1 plate assay, we found that eight gene-deletion mutants had higher HM-1-resistance compared with the wild-type. Among these eight genes, five--ALG3, CAX4, MNS1, OST6 and YBL083C--were associated with N-glycan formation and maturation. The ALG3 gene has been shown before to be highly resistant to HM-1. The YBL083C gene may be a dubious open reading frame that overlaps partially the ALG3 gene. The deletion mutant of the MNS1 gene that encodes 1,2-alpha-mannosidase showed with a 13-fold higher HM-1 resistance compared with the wild-type. By HM-1 binding assay, the yeast plasma membrane fraction of alg3 and mns1 cells had less binding ability compared with wild-type cells. These results indicate that the presence of the terminal 1,3-alpha-linked mannose residue of the B-chain of the N-glycan structure is essential for interaction with HM-1. A deletion mutant of aquaglyceroporin Fps1p also showed increased HM-1 resistance. A deletion mutant of osmoregulatory mitogen-activated protein kinase Hog1p was more sensitive to HM-1, suggesting that high-osmolarity glycerol pathways plays an important role in the compensatory response to HM-1 action.
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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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Evidence ID | Analyze ID | File | Description |
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