Inositides in the nucleus: presence and characterisation of the isozymes of phospholipase beta family in NIH 3T3 cells.
Biochim Biophys Acta
; 1438(2): 295-9, 1999 May 18.
Article
en En
| MEDLINE
| ID: mdl-10320812
ABSTRACT
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.
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Banco de datos:
MEDLINE
Asunto principal:
Fosfolipasas de Tipo C
/
Núcleo Celular
/
Isoenzimas
Límite:
Animals
Idioma:
En
Revista:
Biochim Biophys Acta
Año:
1999
Tipo del documento:
Article
País de afiliación:
Italia