The dermaseptins are a family of antimicrobial peptides from the tree-frog Phyllomedusa sauvagii. Yeast exposed to dermaseptin S3(1-16), a truncated derivative of dermaseptin S3 with full activity, showed diagnostic markers of yeast apoptosis: the appearance of reactive oxygen species and fragmentation of nuclear DNA. This process was independent of the yeast caspase, Yca1p. Screening of a non-essential gene deletion collection in yeast identified genes that conferred resistance to dermaseptin S3(1-16): izh2Delta, izh3Delta, stm1Delta and aif1Delta, all known to be involved in regulating yeast apoptosis. The appearance of apoptotic markers was reduced in these strains when exposed to the peptide. Dermaseptin S3(1-16) was shown to interact with DNA, and cause DNA damage in vivo, a process known to trigger apoptosis. Supporting this, a dermaseptin S3(1-16) affinity column specifically purified Stm1p, Mre11p and Htb2p; DNA-binding proteins implicated in yeast apoptosis and DNA repair. Thus, amphibians may have evolved a mechanism to induce cell suicide in invading fungal pathogens.
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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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