scholarly journals Purification and characterization of human erythrocyte phosphatidylinositol 4-kinase. Phosphatidylinositol 4-kinase and phosphatidylinositol 3-monophosphate 4-kinase are distinct enzymes

1992 ◽  
Vol 284 (1) ◽  
pp. 39-45 ◽  
Author(s):  
A Graziani ◽  
L E Ling ◽  
G Endemann ◽  
C L Carpenter ◽  
L C Cantley
Keyword(s):  
Monoclonal Antibody ◽  
Human Erythrocyte ◽  
Membrane Fraction ◽  
Kinase Activity ◽  
Bovine Brain ◽  
Erythrocyte Membranes ◽  
Major Protein ◽  
Type Ii ◽  
Effective Inhibitor ◽  
Phosphatidylinositol 4

PtdIns 4-kinase has been purified 83,000-fold from human erythrocyte membranes. The major protein detected by SDS/PAGE is of molecular mass 56 kDa, and enzymic activity can be renatured from this band of the gel. The characteristics of this enzyme are similar to other type II PtdIns kinases previously described: PtdIns presented in Triton X-100 micelles is preferred as a substrate over PtdIns vesicles, the enzyme possesses a relatively low Km for ATP (20 microM), and adenosine is an effective inhibitor. A monoclonal antibody raised against bovine brain type II PtdIns 4-kinase is an effective inhibitor of the purified enzyme. PtdIns(4,5)P2 inhibits by approx. 50% when added in equimolar amounts with PtdIns; PtdIns4P has little effect on activity. A PtdIns3P 4-kinase activity has also been detected in erythrocyte lysates. Approximately two-thirds of this activity is in the cytosolic fraction and one-third in the membrane fraction. No PtdIns3P 4-kinase activity could be detected in the purified type II PtdIns 4-kinase preparation, nor could this activity be detected in a bovine brain type III PtdIns 4-kinase preparation. The monoclonal antibody that inhibits the type II PtdIns 4-kinase does not affect the PtdIns3P 4-kinase activity in the membrane fraction. The cytosolic PtdIns3P 4-kinase can be efficiently recovered from a 60%-satd.-(NH4)2SO4 precipitate that is virtually free of PtdIns 4-kinase activity. We conclude that PtdIns3P 4-kinase is a new enzyme distinct from previously characterized PtdIns 4-kinases, and that this enzyme prefers PtdIns3P over PtdIns as a substrate.

scholarly journals A monoclonal antibody distinguishes two types of phosphatidylinositol 4-kinase

1991 ◽  
Vol 273 (1) ◽  
pp. 63-66 ◽  
Author(s):  
G C Endemann ◽  
A Graziani ◽  
L C Cantley
Keyword(s):  
Monoclonal Antibody ◽  
Rat Brain ◽  
Rat Liver ◽  
Bovine Brain ◽  
Human Erythrocytes ◽  
Gene Products ◽  
Type Ii ◽  
Type Iii ◽  
Distinct Gene ◽  
Phosphatidylinositol 4

A monoclonal antibody has been developed against the type II PtdIns 4-kinase from bovine brain. This antibody, 4C5G, causes greater than 90% inhibition of the type II PtdIns 4-kinase from bovine brain, rat brain and human erythrocytes. However, it fails to inhibit type III PtdIns 4-kinase from bovine brain or PtdIns 3-kinase from rat liver. These results suggest that type II and type III PtdIns 4-kinases are distinct gene products, and that 4C5G will be useful in studying the function of the type II PtdIns 4-kinase.

Nuclear localization of phosphatidylinositol 4-kinase β

2002 ◽  
Vol 115 (8) ◽  
pp. 1769-1775 ◽  
Author(s):  
Petra de Graaf ◽  
Elsa E. Klapisz ◽  
Thomas K. F. Schulz ◽  
Alfons F. M. Cremers ◽  
Arie J. Verkleij ◽  
...  
Keyword(s):  
Nuclear Export ◽  
Kinase Activity ◽  
Insoluble Fraction ◽  
Type Ii ◽  
3T3 Cells ◽  
Type Iii ◽  
Pore Complexes ◽  
Phosphatidylinositol 4 ◽  
Nih 3T3 ◽  
Nih 3T3 Cells

Whereas most phosphatidylinositol 4-kinase (PtdIns 4-kinase) activity is localized in the cytoplasm, PtdIns 4-kinase activity has also been detected in membranedepleted nuclei of rat liver and mouse NIH 3T3 cells. Here we have characterized the PtdIns 4-kinase that is present in nuclei from NIH 3T3 cells. Both type II and type III PtdIns 4-kinase activity were observed in the detergent-insoluble fraction of NIH 3T3 cells. Dissection of this fraction into cytoplasmic actin filaments and nuclear lamina-pore complexes revealed that the actin filament fraction contains solely type II PtdIns 4-kinase,whereas lamina-pore complexes contain type III PtdIns 4-kinase activity. Using specific antibodies, the nuclear PtdIns 4-kinase was identified as PtdIns 4-kinase β. Inhibition of nuclear export by leptomycin B resulted in an accumulation of PtdIns 4-kinase β in the nucleus. These data demonstrate that PtdIns 4-kinase β is present in the nuclei of NIH 3T3 fibroblasts,suggesting a specific function for this kinase in nuclear processes.

Sulfhydryl substituents of the human erythrocyte hexose transport mechanism

1986 ◽  
Vol 250 (6) ◽  
pp. C853-C860 ◽  
Author(s):  
R. E. Abbott ◽  
D. Schachter ◽  
E. R. Batt ◽  
M. Flamm
Keyword(s):  
Human Erythrocyte ◽  
Transport Mechanism ◽  
Cytochalasin B ◽  
Erythrocyte Membranes ◽  
Type I ◽  
Type Ii ◽  
Hexose Transport ◽  
Intact Cells ◽  
Type Iii ◽  
Human Erythrocyte Membranes

Sulfhydryl substituents of the hexose transport mechanism of human erythrocyte membranes were studied with membrane-impermeant and -permeant maleimide derivatives. Three sulfhydryl classes have been identified on the basis of their reactivity toward the reagents and their effects on the transport mechanism. Type I sulfhydryl is located at the outer (exofacial) surface of the membrane and bound covalently on treatment of intact cells with the membrane-impermeant glutathione-maleimide. This sulfhydryl is required for the transport, and it is protected from alkylation, i.e., its reactivity toward maleimides is decreased by the presence of D-glucose or cytochalasin B. Type II sulfhydryl is also required for the transport, but it differs from type I in that D-glucose (but not cytochalasin B) increases the reactivity toward maleimides. Further, it is located at the endofacial surface of the membrane, since reaction with glutathione-maleimide occurs only in leaky ghosts and not in intact cells. Alkylation by glutathione-maleimide of type I and type II sulfhydryls increases the half-saturation for the binding of D-glucose to erythrocyte membranes. In contrast, inactivation of type III sulfhydryls by N-ethylmaleimide or dipyridyl disulfide decreases the half-saturation concentration for the binding of D-glucose and other transported hexoses to the membranes; nontransported sugars are not affected similarly. Type III sulfhydryl is not inactivated by the polar reagent glutathione-maleimide and is probably located in a nonpolar domain of the transport mechanism. Inactivation of either type I or II sulfhydryls decreases or eliminates the flux asymmetry of the hexose transport mechanism.

scholarly journals Phosphatidylinositol 4-kinase type II  is responsible for the phosphatidylinositol 4-kinase activity associated with synaptic vesicles

2003 ◽  
Vol 100 (7) ◽  
pp. 3995-4000 ◽  
Author(s):  
J. Guo ◽  
M. R. Wenk ◽  
L. Pellegrini ◽  
F. Onofri ◽  
F. Benfenati ◽  
...  
Keyword(s):  
Synaptic Vesicles ◽  
Kinase Activity ◽  
Type Ii ◽  
Phosphatidylinositol 4

scholarly journals Phosphatidylinositol-4-Kinase Type II Alpha Contains an AP-3–sorting Motif and a Kinase Domain That Are Both Required for Endosome Traffic

2008 ◽  
Vol 19 (4) ◽  
pp. 1415-1426 ◽  
Author(s):  
Branch Craige ◽  
Gloria Salazar ◽  
Victor Faundez
Keyword(s):  
Synaptic Vesicles ◽  
Kinase Activity ◽  
Kinase Domain ◽  
Membrane Domains ◽  
Type Ii ◽  
Catalytic Domains ◽  
Sorting Motif ◽  
Lysosome Related Organelles ◽  
Mutant Phenotypes ◽  
Phosphatidylinositol 4

The adaptor complex 3 (AP-3) targets membrane proteins from endosomes to lysosomes, lysosome-related organelles and synaptic vesicles. Phosphatidylinositol-4-kinase type II α (PI4KIIα) is one of several proteins possessing catalytic domains that regulate AP-3–dependent sorting. Here we present evidence that PI4KIIα uniquely behaves both as a membrane protein cargo as well as an enzymatic regulator of adaptor function. In fact, AP-3 and PI4KIIα form a complex that requires a dileucine-sorting motif present in PI4KIIα. Mutagenesis of either the PI4KIIα-sorting motif or its kinase-active site indicates that both are necessary to interact with AP-3 and properly localize PI4KIIα to LAMP-1–positive endosomes. Similarly, both the kinase activity and the sorting signal present in PI4KIIα are necessary to rescue endosomal PI4KIIα siRNA-induced mutant phenotypes. We propose a mechanism whereby adaptors use canonical sorting motifs to selectively recruit a regulatory enzymatic activity to restricted membrane domains.

Regulation and recruitment of phosphatidylinositol 4-kinase on immature secretory granules is independent of ADP-ribosylation factor 1

2002 ◽  
Vol 363 (2) ◽  
pp. 289-295 ◽  
Author(s):  
Christina PANARETOU ◽  
Sharon A. TOOZE
Keyword(s):  
Kinase Activity ◽  
Secretory Granules ◽  
Specific Inhibitor ◽  
Small Gtpases ◽  
Type Ii ◽  
Adp Ribosylation ◽  
Lipid Kinases ◽  
Phosphatidylinositol 4 ◽  
Golgi Network ◽  
Adp Ribosylation Factor

Heterotrimeric G-proteins, as well as small GTPases of the Rho and ADP-ribosylation factor (ARF) family, are implicated in the regulation of lipid kinases, including PtdIns 4-kinases and PtdIns(4)P 5-kinases. Here, we describe a PtdIns 4-kinase activity on immature secretory granules (ISGs), regulated secretory organelles formed from the trans-Golgi network (TGN), and investigate the regulation of PtdIns4P levels on these membranes. Over 50% of the PtdIns 4-kinase activity on ISGs is inhibited by both a low concentration of adenosine and the monoclonal antibody 4C5G, a specific inhibitor of the type II PtdIns 4-kinase. Treatment of ISGs with mastoparan 7 (M7) stimulates the type II PtdIns 4-kinase via pertussis-toxin-sensitive Gi/G0 proteins, which, in contrast with previous results obtained with chromaffin granules [Gasman, Chasserot-Golaz, Hubert, Aunis and Bader (1998) J. Biol. Chem. 273, 16913–16920], does not require Rho A, B or C. M7 treatment also leads to an inhibition in the recruitment of ARF to ISG membranes: this inhibition is not dependent on Gi/G0 activation, and is not linked to the stimulation of PtdIns 4-kinase observed with M7. PtdIns 4-kinase activity on ISGs is not regulated by myristoylated ARF1—GTP, in contrast with results obtained with Golgi membranes [Godi, Pertile, Meyers, Marra, Di Tullio, Iurisci, Luini, Corda and De Matteis (1999) Nat. Cell Biol. 1, 280–287; Jones, Morris, Morgan, Kondo, Irvine and Cockcroft (2000) J. Biol. Chem. 275, 13962–13170], whereas ARF1—GTP does regulate the production of PtdIns(4,5)P2. Our results suggest that the regulation of PtdIns 4-kinase on the ISGs differs in comparison with that on the TGN, and might be related to a specific requirement of ISG maturation.

Characterization of a Monoclonal Antibody Against P57, The C3/C3b-Cleaving Proteinase Expressed in Human Erythrocyte Membranes

Hybridoma ◽  
1991 ◽  
Vol 10 (4) ◽  
pp. 449-458 ◽  
Author(s):  
ANNY FIANDINO-TIREL ◽  
MONIQUE BAREL ◽  
FOUAD LYAMANI ◽  
ALINE GAUFFRE ◽  
JACQUES HERMANN ◽  
...  
Keyword(s):  
Monoclonal Antibody ◽  
Human Erythrocyte ◽  
Erythrocyte Membranes ◽  
Human Erythrocyte Membranes

scholarly journals Phosphatidylinositol-4-Kinase Type II α Is a Component of Adaptor Protein-3-derived Vesicles

2005 ◽  
Vol 16 (8) ◽  
pp. 3692-3704 ◽  
Author(s):  
Gloria Salazar ◽  
Branch Craige ◽  
Bruce H. Wainer ◽  
Jun Guo ◽  
Pietro De Camilli ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Pc12 Cells ◽  
Membrane Fraction ◽  
Functional Relationship ◽  
Adaptor Protein ◽  
Mossy Fibers ◽  
Nerve Terminals ◽  
Type Ii ◽  
Phosphatidylinositol 4 ◽  
Lysosomal Proteins

A membrane fraction enriched in vesicles containing the adaptor protein (AP) -3 cargo zinc transporter 3 was generated from PC12 cells and was used to identify new components of these organelles by mass spectrometry. Proteins prominently represented in the fraction included AP-3 subunits, synaptic vesicle proteins, and lysosomal proteins known to be sorted in an AP-3-dependent way or to interact genetically with AP-3. A protein enriched in this fraction was phosphatidylinositol-4-kinase type IIα (PI4KIIα). Biochemical, pharmacological, and morphological analyses supported the presence of PI4KIIα in AP-3-positive organelles. Furthermore, the subcellular localization of PI4KIIα was altered in cells from AP-3-deficient mocha mutant mice. The PI4KIIα normally present both in perinuclear and peripheral organelles was substantially decreased in the peripheral membranes of AP-3-deficient mocha fibroblasts. In addition, as is the case for other proteins sorted in an AP-3-dependent way, PI4KIIα content was strongly reduced in nerve terminals of mocha hippocampal mossy fibers. The functional relationship between AP-3 and PI4KIIα was further explored by PI4KIIα knockdown experiments. Reduction of the cellular content of PI4KIIα strongly decreased the punctate distribution of AP-3 observed in PC12 cells. These results indicate that PI4KIIα is present on AP-3 organelles where it regulates AP-3 function.

scholarly journals Localization of a highly active pool of type II phosphatidylinositol 4-kinase in a p97/valosin-containing-protein-rich fraction of the endoplasmic reticulum

2003 ◽  
Vol 373 (1) ◽  
pp. 57-63 ◽  
Author(s):  
Mark G. WAUGH ◽  
Shane MINOGUE ◽  
J. Simon ANDERSON ◽  
Adam BALINGER ◽  
Deena BLUMENKRANTZ ◽  
...  
Keyword(s):  
Endoplasmic Reticulum ◽  
Membrane Fraction ◽  
Unknown Origin ◽  
Type Ii ◽  
A431 Cells ◽  
Aaa Atpase ◽  
Highly Active ◽  
Active Pool ◽  
Phosphatidylinositol 4 ◽  
Protein Rich

Different phosphoinositides are synthesized in cell membranes in order to perform a variety of functions. One of the most abundant of these lipids is phosphatidylinositol (PI) 4-phosphate (PI4P), which is formed in human eukaryotes by type II and type III phosphatidylinositol 4-kinase (PI4K II and III) activities. PI4K II activity occurs in many different subcellular membranes, although no detailed analysis of the distribution of this activity has been reported. Using density gradient ultracentrifugation, we have previously found that in A431 cells the predominant PI4K activity arises from a type IIα enzyme that is localized to a buoyant membrane fraction of unknown origin [Waugh, Lawson, Tan and Hsuan (1998) J. Biol. Chem. 273, 17115–17121]. We show here that these buoyant membranes contain an activated form of PI4K IIα that can be separated from the bulk of the PI4K IIα protein in A431 and COS-7 cells. Proteomic analysis revealed that the buoyant membrane fraction contains numerous endoplasmic reticulum (ER)-marker proteins, although it was separated from the bulk of the ER, ER–Golgi intermediate compartment, transitional ER, Golgi and other major subcellular membranes. Furthermore, the majority of the cytoplasmic valosin-containing protein (VCP), an AAA+ATPase implicated in various ER, transitional ER, Golgi and nuclear functions, was almost completely localized to the same buoyant membrane fraction. Co-localization of VCP and PI4K activity was confirmed by co-immunoprecipitation. These results suggest the previously unsuspected existence of an ER-related domain in which the bulk of the cellular PI4P synthesis and VCP are localized.

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