scholarly journals Signalling via ADP-ribosylation factor 6 lies downstream of phosphatidylinositide 3-kinase

2000 ◽  
Vol 345 (3) ◽  
pp. 719-724 ◽  
Author(s):  
Kanamarlapudi VENKATESWARLU ◽  
Peter J. CULLEN
Keyword(s):  
Plasma Membrane ◽  
Membrane Trafficking ◽  
Cortical Actin ◽  
Membrane Recruitment ◽  
Adp Ribosylation ◽  
Agonist Stimulation ◽  
Adp Ribosylation Factor ◽  
Stimulation Of

ADP-ribosylation factor (ARF) 6 regulates plasma membrane trafficking and cortical actin formation by cycling between inactive GDP and active GTP-bound conformations. Here we show that agonist stimulation of phosphatidylinositide 3-kinase (PI 3-kinase) activates a pathway that leads to ARF6 activation. We also describe experiments that propose a central role in this pathway for the PI 3-kinase-dependent plasma membrane recruitment of the cytohesin-1 family of PtdIns(3,4,5)P3-binding ARF-exchange factors.

scholarly journals ADP-ribosylation-factor-regulated phospholipase D activity localizes to secretory vesicles and mobilizes to the plasma membrane following N-formylmethionyl-leucyl-phenylalanine stimulation of human neutrophils

1997 ◽  
Vol 325 (3) ◽  
pp. 581-585 ◽  
Author(s):  
C. P. MORGAN ◽  
H. SENGELOV ◽  
J. WHATMORE ◽  
N. BORREGAARD ◽  
S. COCKCROFT
Keyword(s):  
Plasma Membrane ◽  
Phospholipase D ◽  
Small Gtpases ◽  
Human Neutrophils ◽  
Secretory Vesicles ◽  
Rho Proteins ◽  
Adp Ribosylation ◽  
Activated Neutrophils ◽  
Adp Ribosylation Factor ◽  
Stimulation Of

Phospholipase D (PLD) is responsible for the hydrolysis of phosphatidylcholine to produce phosphatidic acid and choline. Human neutrophils contain PLD activity which is regulated by the small GTPases, ADP-ribosylation factor (ARF) and Rho proteins. In this study we have examined the subcellular localization of the ARF-regulated PLD activity in non-activated neutrophils and cells ‘primed‘ with N-formylmethionyl-leucyl-phenylalanine (fMetLeuPhe). We report that PLD activity is localized at the secretory vesicles in control cells and is mobilized to the plasma membrane upon stimulation with fMetLeuPhe. We conclude that the ARF-regulated PLD activity is translocated to the plasma membrane by secretory vesicles upon stimulation of neutrophils with fMetLeuPhe in inflammatory/priming doses. We propose that this relocalization of PLD is important for the subsequent events occurring during neutrophil activation.

scholarly journals ADP-Ribosylation Factor 1 (ARF1) Regulates Recruitment of the AP-3 Adaptor Complex to Membranes

1998 ◽  
Vol 142 (2) ◽  
pp. 391-402 ◽  
Author(s):  
Chean Eng Ooi ◽  
Esteban C. Dell'Angelica ◽  
Juan S. Bonifacino
Keyword(s):  
Membrane Trafficking ◽  
Brefeldin A ◽  
Membrane Association ◽  
Coat Proteins ◽  
Nucleotide Exchange ◽  
Membrane Recruitment ◽  
Adp Ribosylation ◽  
Adp Ribosylation Factor

Small GTP-binding proteins such as ADP- ribosylation factor 1 (ARF1) and Sar1p regulate the membrane association of coat proteins involved in intracellular membrane trafficking. ARF1 controls the clathrin coat adaptor AP-1 and the nonclathrin coat COPI, whereas Sar1p controls the nonclathrin coat COPII. In this study, we demonstrate that membrane association of the recently described AP-3 adaptor is regulated by ARF1. Association of AP-3 with membranes in vitro was enhanced by GTPγS and inhibited by brefeldin A (BFA), an inhibitor of ARF1 guanine nucleotide exchange. In addition, recombinant myristoylated ARF1 promoted association of AP-3 with membranes. The role of ARF1 in vivo was examined by assessing AP-3 subcellular localization when the intracellular level of ARF1-GTP was altered through overexpression of dominant ARF1 mutants or ARF1- GTPase-activating protein (GAP). Lowering ARF1-GTP levels resulted in redistribution of AP-3 from punctate membrane-bound structures to the cytosol as seen by immunofluorescence microscopy. In contrast, increasing ARF1-GTP levels prevented redistribution of AP-3 to the cytosol induced by BFA or energy depletion. Similar experiments with mutants of ARF5 and ARF6 showed that these other ARF family members had little or no effect on AP-3. Taken together, our results indicate that membrane recruitment of AP-3 is promoted by ARF1-GTP. This finding suggests that ARF1 is not a regulator of specific coat proteins, but rather is a ubiquitous molecular switch that acts as a transducer of diverse signals influencing coat assembly.

scholarly journals ADP-ribosylation Factor-like GTPase ARFRP1 Is Required for Trans-Golgi to Plasma Membrane Trafficking of E-cadherin

2008 ◽  
Vol 283 (40) ◽  
pp. 27179-27188 ◽  
Author(s):  
Claudia Zahn ◽  
Alexander Jaschke ◽  
Jörg Weiske ◽  
Angela Hommel ◽  
Deike Hesse ◽  
...  
Keyword(s):  
Plasma Membrane ◽  
Membrane Trafficking ◽  
Adp Ribosylation ◽  
Adp Ribosylation Factor ◽  
E Cadherin

scholarly journals ADP-Ribosylation Factor (ARF) Interaction Is Not Sufficient for Yeast GGA Protein Function or Localization

2002 ◽  
Vol 13 (9) ◽  
pp. 3078-3095 ◽  
Author(s):  
Annette L. Boman ◽  
Paul D. Salo ◽  
Melissa J. Hauglund ◽  
Nicole L. Strand ◽  
Shelly J. Rensink ◽  
...  
Keyword(s):  
Membrane Trafficking ◽  
Mammalian Cells ◽  
Fluorescent Protein ◽  
Protein Localization ◽  
Carboxypeptidase Y ◽  
Minor Role ◽  
Temperature Sensitive ◽  
Adp Ribosylation ◽  
And Function ◽  
Adp Ribosylation Factor

Golgi-localized γ-ear homology domain, ADP-ribosylation factor (ARF)-binding proteins (GGAs) facilitate distinct steps of post-Golgi traffic. Human and yeast GGA proteins are only ∼25% identical, but all GGA proteins have four similar domains based on function and sequence homology. GGA proteins are most conserved in the region that interacts with ARF proteins. To analyze the role of ARF in GGA protein localization and function, we performed mutational analyses of both human and yeast GGAs. To our surprise, yeast and human GGAs differ in their requirement for ARF interaction. We describe a point mutation in both yeast and mammalian GGA proteins that eliminates binding to ARFs. In mammalian cells, this mutation disrupts the localization of human GGA proteins. Yeast Gga function was studied using an assay for carboxypeptidase Y missorting and synthetic temperature-sensitive lethality between GGAs andVPS27. Based on these assays, we conclude that non-Arf-binding yeast Gga mutants can function normally in membrane trafficking. Using green fluorescent protein-tagged Gga1p, we show that Arf interaction is not required for Gga localization to the Golgi. Truncation analysis of Gga1p and Gga2p suggests that the N-terminal VHS domain and C-terminal hinge and ear domains play significant roles in yeast Gga protein localization and function. Together, our data suggest that yeast Gga proteins function to assemble a protein complex at the late Golgi to initiate proper sorting and transport of specific cargo. Whereas mammalian GGAs must interact with ARF to localize to and function at the Golgi, interaction between yeast Ggas and Arf plays a minor role in Gga localization and function.

scholarly journals Involvement of a novel ADP-ribosylation factor GTPase-activating protein, SMAP, in membrane trafficking: Implications in cancer cell biology

2006 ◽  
Vol 97 (9) ◽  
pp. 801-806 ◽  
Author(s):  
Kenji Tanabe ◽  
Shunsuke Kon ◽  
Waka Natsume ◽  
Tetsuo Torii ◽  
Toshio Watanabe ◽  
...  
Keyword(s):  
Cancer Cell ◽  
Membrane Trafficking ◽  
Cell Biology ◽  
Gtpase Activating Protein ◽  
Adp Ribosylation ◽  
Adp Ribosylation Factor

Effects of temperature on ADP-ribosylation factor stimulation of cholera toxin activity

Biochemistry ◽  
1993 ◽  
Vol 32 (2) ◽  
pp. 561-566 ◽  
Author(s):  
Toshihiko Murayama ◽  
Su Chen Tsai ◽  
Ronald Adamik ◽  
Joel Moss ◽  
Martha Vaughan
Keyword(s):  
Cholera Toxin ◽  
Adp Ribosylation ◽  
Effects Of Temperature ◽  
Adp Ribosylation Factor ◽  
Stimulation Of

Growth Factors Mobilize Multiple Pools of KCa Channels in Developing Parasympathetic Neurons: Role of ADP-Ribosylation Factors and Related Proteins

2005 ◽  
Vol 94 (2) ◽  
pp. 1597-1605 ◽  
Author(s):  
Kwon-Seok Chae ◽  
Kwang-Seok Oh ◽  
Stuart E. Dryer
Keyword(s):  
Plasma Membrane ◽  
Growth Factors ◽  
Golgi Apparatus ◽  
Bound States ◽  
Brefeldin A ◽  
Dominant Negative ◽  
Over Expression ◽  
Adp Ribosylation ◽  
Phospholipase D1 ◽  
Adp Ribosylation Factor

In developing ciliary ganglion (CG) neurons, movement of functional large-conductance (BK type) Ca2+-activated K+ ( KCa) channels to the cell surface is stimulated by the endogenous growth factors TGFβ1 and β-neuregulin-1 (NRG1). Here we show that a brief NRG1 treatment (0.5–1.5 h) mobilizes KCa channels in a post-Golgi compartment, but longer treatments (>3.5 h) mobilize KCa channels located in the endoplasmic reticulum or Golgi apparatus. Specifically, the effects of 3.5 h NRG1 treatment were completely blocked by treatments that disrupt Golgi apparatus function. These include inhibition of microtubules, or inhibition of the ADP-ribosylation factor-1 (ARF1) system by brefeldin A, by over-expression of dominant-negative ARF1, or over-expression of an ARF1 GTPase-activating protein that blocks ARF1 cycling between GTP- and GDP-bound states. These treatments had no effect on stimulation of KCa evoked by 1.5 h treatment with NRG1, indicating that short-term responses to NRG1 do not require an intact Golgi apparatus. By contrast, both the acute and sustained effects of NRG1 were inhibited by treatments that block trafficking processes that occur close to the plasma membrane. Thus mobilization of KCa was blocked by treatments than inhibit ADP-ribosylation factor-6 (ARF6) signaling, including overexpression of dominant-negative ARF6, dominant-negative ARNO, or dominant-negative phospholipase D1. TGFβ1, the effects of which on KCa are much slower in onset, is unable to selectively mobilize channels in the post-Golgi pool, and its effects on KCa are completely blocked by inhibition of microtubules, Golgi function and also by plasma membrane ARF6 and phospholipase D1 signaling.

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