The granulocyte macrophage-colony-stimulating factor receptor (GM-CSF-R) is a heterodimer composed of 2 subunits, alpha and beta, and ligand binding to the high-affinity receptor leads to signalling for the multiple actions of GM-CSF on target cells. In order to explore the role of the alpha subunit in signalling, we used a yeast-2-hybrid system to identify proteins interacting with the intracellular domain of the GMR-alpha. A cDNA encoding a predicted protein of 198 amino acids, designated GRAP (GM-CSF receptor alpha subunit-associated protein), was isolated in experiments using the intracellular portion of GMR-alpha as bait. The interaction between GRAP and GMR-alpha was confirmed by coimmunoprecipitation in mammalian cells. GRAP mRNA is widely expressed in normal human and mouse tissues and in neoplastic human cell lines, but it is not restricted to cells or tissues that express GM-CSF receptors. Three discrete GRAP mRNA species were detected in human tissues and cells, with estimated sizes of 3.3, 3.1, and 1.3 kb. GRAP is highly conserved throughout evolution, and homologues are found in yeast. The GRAP locus in Saccharomyces cerevisiae was disrupted, and mutant yeast cells showed an inappropriate stress response under normal culture conditions, manifested by early accumulation of glycogen during the logarithmic growth phase. GRAP is, therefore, a highly conserved and widely expressed protein that binds to the intracellular domain of GMR-alpha, and it appears to play an important role in cellular metabolism.
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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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