Two pathways exist in mammalian cells to degrade 1-phosphatidyl-1D-myo-inositol 4,5-bisphosphate [PtdIns(4,5)P2] . One is catalysed by this enzyme and the other by EC 3.1.3.36, phosphoinositide 5-phosphatase, where the product is PtdIns4P. The enzyme from human is specific for PtdIns(4,5)P2 as substrate, as it cannot use PtdIns(3,4,5)P3, PtdIns(3,4)P2, PtdIns(3,5)P2, PtdIns5P, PtdIns4P or PtdIns3P . In humans, the enzyme is localized to late endosomal/lysosomal membranes . It can control nuclear levels of PtdIns5P and thereby control p53-dependent apoptosis .
Specify your search results
The taxonomic range for the selected organisms is: Homo sapiens The expected taxonomic range for this enzyme is: Eukaryota, Bacteria
Two pathways exist in mammalian cells to degrade 1-phosphatidyl-1D-myo-inositol 4,5-bisphosphate [PtdIns(4,5)P2] [2]. One is catalysed by this enzyme and the other by EC 3.1.3.36, phosphoinositide 5-phosphatase, where the product is PtdIns4P. The enzyme from human is specific for PtdIns(4,5)P2 as substrate, as it cannot use PtdIns(3,4,5)P3, PtdIns(3,4)P2, PtdIns(3,5)P2, PtdIns5P, PtdIns4P or PtdIns3P [2]. In humans, the enzyme is localized to late endosomal/lysosomal membranes [2]. It can control nuclear levels of PtdIns5P and thereby control p53-dependent apoptosis [3].
siRNA of type I 4-phosphatase reduces type I 4-phosphatase levels, which is followed by a dramatic decrease in p53 levels in response to the genotoxic agent etoposide. siRNA of type II 4-phosphatase does not reduce p53 expression
when HeLa cells are treated with etoposide or doxorubicin, type I 4-phosphatase translocates to the nucleus and nuclear levels of phosphatidylinositol 5-phosphate increase
PtdIns(4,5)P2 4-phosphatase expression induces Src kinase and Akt, but not ERK activation and enhances interleukin II promoter activity in T-cells. Expression of a PtdIns5P interacting domain, PH-Dok-5, blocks IpgD-induced T-cell activation and selective signaling molecules downstream of TCR triggering, evaluation, overview
phosphatidylinositol 5-phosphate may play a sensor function in setting the threshold of T-cell activation and contributing to maintain T-cell homeostasis
Please wait a moment until the data is sorted. This message will disappear when the data is sorted.
CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
type II isozyme, DNA and amino acid sequence determination and analysis, transient transfection of functional enzyme to HeLa and COS-7 cells leading to increased EGFR degradation via increased phosphatidylinositol-5-phosphate content, functional overexpression of FLAG-tagged enzyme in Spodoptera frugiperda Sf9 cells using the baculovirus infection system
type I isozyme, DNA and amino acid sequence determination and analysis, transient transfection of functional enzyme to HeLa and COS-7 cells leading to increased EGFR degradation via increased phosphatidylinositol-5-phosphate content, functional overexpression of FLAG-tagged enzyme in Spodoptera frugiperda Sf9 cells using the baculovirus infection system, stable inducible expression of labeled isozyme I in HEK293 cells
type I 4-phosphatase regulates nuclear phosphatidylinositol 5-phosphate levels, which in turn mediate p53-dependent apoptosis through interaction with inhibitor of growth protein-2 in response to genotoxic stress