Signal transduction pathways are important in the adaptive response of microbes to their environment. A Pneumocystis carinii extracellular signal-regulated protein kinase (MAPK) homologue, Mkp1, has been isolated by sequence similarity screening of P. carinii genomic DNA. The Mkp1 of P. carinii shows closest homology to other fungal MAP kinases involved in cell integrity signal transduction cascades, including Slt2p/Mpk1p of Saccharomyces cerevisiae, Mkc1 of Candida albicans and Mps1 of Magnaporthe grisea. Defects of Slt2p in S. cerevisiae result in phenotypes of slow growth, and temperature sensitivity in the absence of an osmostabilizer. Overexpression of mkp1 in a strain with the slt2Delta defect fully restored the normal growth rate, and partially reduced lysis at elevated temperatures. Complementation of the slt2Delta defect by Mkp1 demonstrates that Mkp1 is a functional MAP kinase, and that it may be the MAP kinase component of a similar signal transduction cascade within P. carinii. Furthermore, Mkp1 is activated in vitro upon the exposure of P. carinii to conditions of oxidative stress. The investigation of a MAP kinase signal transduction pathway of P. carinii will result in both a better understanding of the mechanism the organism utilizes to respond to environmental changes, and a system to assay responses to these changes.
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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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