Protein families related to OSBP (oxysterol-binding protein) are present in eukaryotes from yeast to human. The functions of the ORPs (OSBP-related proteins) have remained largely enigmatic. Even though they have been implicated in the function of ERJs (endoplasmic reticulum junctions), it is evident that any single model for their mechanism of action is insufficient. The existing evidence points in many different directions, such as integration of sterol and sphingomyelin metabolism, regulation of neutral lipid metabolism, control of signalling cascades, regulation of secretory vesicle generation, and function in the microtubule-based motility of endo/lysosomes. Some of these functions could involve ERJ and non-vesicular transport of lipids, but this is unlikely to be the unifying feature. We believe, rather, that the common denominator for ORP function is acting as sterol sensors that relay information to a spectrum of cellular processes.
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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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