Inositides in the nucleus: presence and characterisation of the isozymes of phospholipase β family in NIH 3T3 cells
| Autor: | Daniela Peruzzi, Irene Faenza, Lucia Manzoli, R. Stewart Gilmour, Sue Goo Rhee, Marco Artico, Alessandro Matteucci, Silvia Rubbini, Anna Maria Billi, Lucio Cocco |
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| Rok vydání: | 1999 |
| Předmět: |
Gene isoform
Blotting Western Phospholipase C beta Biology Phospholipase Isozyme Antibodies Mice chemistry.chemical_compound medicine Animals Inositol Molecular Biology Cell Nucleus Phospholipase C 3T3 Cells Intracellular Membranes Cell Biology Cell biology Isoenzymes medicine.anatomical_structure chemistry Phosphatidylinositol 4 5-bisphosphate Type C Phospholipases Bacterial outer membrane Nucleus Signal Transduction |
| Zdroj: | Biochimica et Biophysica Acta (BBA) - Molecular and Cell Biology of Lipids. 1438:295-299 |
| ISSN: | 1388-1981 |
| DOI: | 10.1016/s1388-1981(99)00061-x |
| Popis: | Previous reports from our laboratories and others have hinted that the nucleus is a site for an autonomous signalling system acting through the activation of the inositol lipid cycle. Among phospholipases (PLC) it has been shown previously that PLCbeta1 is specifically localised in the nucleus as well as at the plasma membrane. Using NIH 3T3 cells, it has been possible to obtain, with two purification strategies, in the presence or in the absence of Nonidet P-40, both intact nuclei still maintaining the outer membrane and nuclei completely stripped of their envelope. In these nuclei, we show that not only PLCbeta1 is present, but also PLCbeta2, PLCbeta3 and PLCbeta4. The more abounding isoform is PLCbeta1 followed by PLCbeta3, PLCbeta2 and PLCbeta4, respectively. All the isoforms are enriched in nuclear preparations free from nuclear envelope and cytoplasmatic debris, indicating that the actual localisation of the PLCbeta isozymes is in the inner nuclear compartment. |
| Databáze: | OpenAIRE |
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