Phosphoinositide-specific phospholipase C (PI-PLC) beta1 and nuclear lipid-dependent signaling. 2006

Lucio Cocco, and Irene Faenza, and Roberta Fiume, and Anna Maria Billi, and R Stewart Gilmour, and Francesco A Manzoli
Cellular Signalling Laboratory, Department of Human Anatomical Sciences, University of Bologna, Via Irnerio 48, 40126 Bologna, Italy. lcocco@biocfarm.unibo.it

Over the last years, evidence has suggested that phosphoinositides, which are involved in the regulation of a large variety of cellular processes both in the cytoplasm and in the plasma membrane, are present also within the nucleus. A number of advances has resulted in the discovery that phosphoinositide-specific phospholipase C signalling in the nucleus is involved in cell growth and differentiation. Remarkably, the nuclear inositide metabolism is regulated independently from that present elsewhere in the cell. Even though nuclear inositol lipids hydrolysis generates second messengers such as diacylglycerol and inositol 1,4,5-trisphosphate, it is becoming increasingly clear that in the nucleus polyphosphoinositides may act by themselves to influence pre-mRNA splicing and chromatin structure. Among phosphoinositide-specific phospholipase C, the beta(1) isoform appears to be one of the key players of the nuclear lipid signaling. This review aims at highlighting the most significant and up-dated findings about phosphoinositide-specific phospholipase C beta(1) in the nucleus.

UI MeSH Term Description Entries
D008051 Lipid Bilayers Layers of lipid molecules which are two molecules thick. Bilayer systems are frequently studied as models of biological membranes. Bilayers, Lipid,Bilayer, Lipid,Lipid Bilayer
D009685 Nuclear Envelope The membrane system of the CELL NUCLEUS that surrounds the nucleoplasm. It consists of two concentric membranes separated by the perinuclear space. The structures of the envelope where it opens to the cytoplasm are called the nuclear pores (NUCLEAR PORE). Nuclear Membrane,Envelope, Nuclear,Envelopes, Nuclear,Membrane, Nuclear,Membranes, Nuclear,Nuclear Envelopes,Nuclear Membranes
D010716 Phosphatidylinositols Derivatives of phosphatidic acids in which the phosphoric acid is bound in ester linkage to the hexahydroxy alcohol, myo-inositol. Complete hydrolysis yields 1 mole of glycerol, phosphoric acid, myo-inositol, and 2 moles of fatty acids. Inositide Phospholipid,Inositol Phosphoglyceride,Inositol Phosphoglycerides,Inositol Phospholipid,Phosphoinositide,Phosphoinositides,PtdIns,Inositide Phospholipids,Inositol Phospholipids,Phosphatidyl Inositol,Phosphatidylinositol,Inositol, Phosphatidyl,Phosphoglyceride, Inositol,Phosphoglycerides, Inositol,Phospholipid, Inositide,Phospholipid, Inositol,Phospholipids, Inositide,Phospholipids, Inositol
D002467 Cell Nucleus Within a eukaryotic cell, a membrane-limited body which contains chromosomes and one or more nucleoli (CELL NUCLEOLUS). The nuclear membrane consists of a double unit-type membrane which is perforated by a number of pores; the outermost membrane is continuous with the ENDOPLASMIC RETICULUM. A cell may contain more than one nucleus. (From Singleton & Sainsbury, Dictionary of Microbiology and Molecular Biology, 2d ed) Cell Nuclei,Nuclei, Cell,Nucleus, Cell
D002468 Cell Physiological Phenomena Cellular processes, properties, and characteristics. Cell Physiological Processes,Cell Physiology,Cell Physiological Phenomenon,Cell Physiological Process,Physiology, Cell,Phenomena, Cell Physiological,Phenomenon, Cell Physiological,Physiological Process, Cell,Physiological Processes, Cell,Process, Cell Physiological,Processes, Cell Physiological
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D015398 Signal Transduction The intracellular transfer of information (biological activation/inhibition) through a signal pathway. In each signal transduction system, an activation/inhibition signal from a biologically active molecule (hormone, neurotransmitter) is mediated via the coupling of a receptor/enzyme to a second messenger system or to an ion channel. Signal transduction plays an important role in activating cellular functions, cell differentiation, and cell proliferation. Examples of signal transduction systems are the GAMMA-AMINOBUTYRIC ACID-postsynaptic receptor-calcium ion channel system, the receptor-mediated T-cell activation pathway, and the receptor-mediated activation of phospholipases. Those coupled to membrane depolarization or intracellular release of calcium include the receptor-mediated activation of cytotoxic functions in granulocytes and the synaptic potentiation of protein kinase activation. Some signal transduction pathways may be part of larger signal transduction pathways; for example, protein kinase activation is part of the platelet activation signal pathway. Cell Signaling,Receptor-Mediated Signal Transduction,Signal Pathways,Receptor Mediated Signal Transduction,Signal Transduction Pathways,Signal Transduction Systems,Pathway, Signal,Pathway, Signal Transduction,Pathways, Signal,Pathways, Signal Transduction,Receptor-Mediated Signal Transductions,Signal Pathway,Signal Transduction Pathway,Signal Transduction System,Signal Transduction, Receptor-Mediated,Signal Transductions,Signal Transductions, Receptor-Mediated,System, Signal Transduction,Systems, Signal Transduction,Transduction, Signal,Transductions, Signal
D043265 Phosphatidylinositol Diacylglycerol-Lyase A phosphorus-oxygen lyase found primarily in BACTERIA. The enzyme catalyzes the cleavage of a phosphoester linkage in 1-phosphatidyl-1D-myo-inositol to form 1D-myo-inositol 1,2-cyclic phosphate and diacylglycerol. The enzyme was formerly classified as a phosphoric diester hydrolase (EC 3.1.4.10) and is often referred to as a TYPE C PHOSPHOLIPASES. However it is now known that a cyclic phosphate is the final product of this enzyme and that water does not enter into the reaction. 1-Phosphatidylinositol Phosphodiesterase,Monophosphatidylinositol Phosphodiesterase,1 Phosphatidylinositol Phosphodiesterase,Diacylglycerol-Lyase, Phosphatidylinositol,Phosphatidylinositol Diacylglycerol Lyase,Phosphodiesterase, 1-Phosphatidylinositol,Phosphodiesterase, Monophosphatidylinositol
D054801 Phosphoinositide Phospholipase C A type C phospholipase with specificity towards PHOSPHATIDYLINOSITOLS that contain INOSITOL 1,4,5-TRISPHOSPHATE. Many of the enzymes listed under this classification are involved in intracellular signaling. 1-Phosphatidyl-D-myo-Inositol-4,5-bisphosphate Inositoltrisphosphohydrolase,1-Phosphatidylinositol-4,5-Bisphosphate Phosphodiesterase,PIP2-PLC,PIP2-Phosphoinositidase C,PPI Phosphodiesterase,Phosphatidylinositide-4,5-Bisphosphate Phospholipase C,Phosphatidylinositol-4,5-Biphosphate-Phosphodiesterase,Phosphatidylinositol-Specific Phospholipase C,Phosphoinositide Selective Phospholipase C,Phosphoinositol Specific Phospholipase C,Polyphosphoinositide Phosphodiesterase,Polyphosphoinositide Phospholipase C,PtdIns(4,5)P2 Phosphodiesterase,Tri-phosphoinositide Phosphodiesterase,Triphosphoinositide Phosphodiesterase,1 Phosphatidyl D myo Inositol 4,5 bisphosphate Inositoltrisphosphohydrolase,1 Phosphatidylinositol 4,5 Bisphosphate Phosphodiesterase,Inositoltrisphosphohydrolase, 1-Phosphatidyl-D-myo-Inositol-4,5-bisphosphate,PIP2 Phosphoinositidase C,Phosphatidylinositide 4,5 Bisphosphate Phospholipase C,Phosphatidylinositol 4,5 Biphosphate Phosphodiesterase,Phosphatidylinositol Specific Phospholipase C,Phosphodiesterase, 1-Phosphatidylinositol-4,5-Bisphosphate,Phosphodiesterase, PPI,Phosphodiesterase, Polyphosphoinositide,Phosphodiesterase, Triphosphoinositide,Phospholipase C, Phosphatidylinositide-4,5-Bisphosphate,Phospholipase C, Phosphatidylinositol-Specific,Phospholipase C, Polyphosphoinositide,Tri phosphoinositide Phosphodiesterase

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