Upon permeabilization of Swiss mouse 3T3 fibroblasts, an isoform of phosphatidylinositol transfer protein (PI-TP) was preferentially retained, a major part of which was associated with the perinuclear Golgi system (K. J. de Vries, A. Momchilova-Pankova, G. T. Snoek, and K. W. A. Wirtz, Exp. Cell Res. 215, 109-113, 1994). In the present study, the intracellular localization of this isoform (PI-TP beta) and the regular form (PI-TP alpha) was investigated in fetal bovine heart endothelial cells by microinjection of fluorescently labeled analogs followed by confocal laser scanning microscopy. The PI-TP alpha and PI-TP beta used were purified from bovine brain cytosol and covalently labeled with sulfoindocyanine dyes. By this novel method it was found that PI-TP beta was preferentially associated with perinuclear membrane structures whereas PI-TP alpha was predominantly present in the nucleus and in the cytoplasm. This intracellular localization was confirmed by indirect immunofluorescence indicating that the fluorescently labeled PI-TP alpha and PI-TP beta were targeted to the same sites as their endogeneous counterparts.
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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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