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Kundu R, Chandra A, Datta A. Fluorescent Chemical Tools for Tracking Anionic Phospholipids. Isr J Chem 2021. [DOI: 10.1002/ijch.202100003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Rajasree Kundu
- Department of Chemical Sciences Tata Institute of Fundamental Research 1 Homi Bhabha Road, Colaba Mumbai 400005 India
| | - Amitava Chandra
- Department of Chemical Sciences Tata Institute of Fundamental Research 1 Homi Bhabha Road, Colaba Mumbai 400005 India
| | - Ankona Datta
- Department of Chemical Sciences Tata Institute of Fundamental Research 1 Homi Bhabha Road, Colaba Mumbai 400005 India
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2
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Morstein J, Impastato AC, Trauner D. Photoswitchable Lipids. Chembiochem 2020; 22:73-83. [PMID: 32790211 DOI: 10.1002/cbic.202000449] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/11/2020] [Indexed: 12/29/2022]
Abstract
Photoswitchable lipids are emerging tools for the precise manipulation and study of lipid function. They can modulate many aspects of membrane biophysics, including permeability, fluidity, lipid mobility and domain formation. They are also very useful in lipid physiology and enable optical control of a wide array of lipid receptors, such as ion channels, G protein-coupled receptors, nuclear hormone receptors, and enzymes that translocate to membranes. Enzymes involved in lipid metabolism often process them in a light-dependent fashion. Photoswitchable lipids complement other functionalized lipids widely used in lipid chemical biology, including isotope-labeled lipids (lipidomics), fluorescent lipids (imaging), bifunctional lipids (lipid-protein crosslinking), photocaged lipids (photopharmacology), and other labeled variants.
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Affiliation(s)
- Johannes Morstein
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003-6699, USA
| | - Anna C Impastato
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003-6699, USA
| | - Dirk Trauner
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY, 10003-6699, USA
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3
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Mondal S, Chandra A, Venkatramani R, Datta A. Optically sensing phospholipid induced coil-helix transitions in the phosphoinositide-binding motif of gelsolin. Faraday Discuss 2019; 207:437-458. [PMID: 29363700 DOI: 10.1039/c7fd00197e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We present a systematic experimental and computational study of phospholipid induced peptide coil-helix transitions which are relevant in the context of proteins mediating cytoskeletal rearrangement via membrane binding. We developed a sensitive Förster resonance energy transfer (FRET) based assay to address whether coil-helix transitions in phospholipid binding motifs of actin-binding proteins can be induced by physiologically-relevant concentrations (1-20 μM) of phosphatidylinositol-4,5-bisphosphate (PI(4,5)P2) phospholipids. Based on inter-residue distance constraints obtained from Molecular Dynamics (MD) simulations of a 20 residue peptide (Gel 150-169) from the actin-severing protein gelsolin, we synthetized and labeled the peptide with a tryptophan donor and IAEDANS acceptor pair. Upon addition of PI(4,5)P2 micelles and mixed vesicles containing PI(4,5)P2 and phosphatidylcholine to the peptide, we observed a decrease in the tryptophan emission intensity with increasing concentrations of PI(4,5)P2. The IAEDANS emission spectra showed a more complex profile exhibiting a blue shift of the emission peak and non-monotonic changes in the intensity profile with increasing concentrations of PI(4,5)P2. We showed that the IAEDANS acceptor emission response is a result of both intrinsic polarity sensitivity of the acceptor in the vicinity of the membrane surface and fluorescence energy transfer from the donor. Importantly, the fluorescence lifetime of the donor (tryptophan) showed a monotonous decrease with increasing mol% of PI(4,5)P2 from 1.13 ± 0.10 ns in the absence of phospholipids to 0.25 ± 0.03 ns in the presence of 100% PI(4,5)P2 micelles. We also showed a concomitant increase in FRET efficiency with increasing PI(4,5)P2 levels indicating a PI(4,5)P2 concentration dependent coil-helix transition. Our studies demonstrate that membrane PI(4,5)P2 concentrations as low as 2.5-5 μM can trigger helix-coil conformational changes in gelsolin relevant for triggering regulatory processes in the cell.
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Affiliation(s)
- Samsuzzoha Mondal
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Mumbai, 400005, India.
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Abstract
For decades, lipids were assumed to fulfill roles only in energy storage and membrane structure. Recent studies have discovered critical roles for phospholipids, sphingolipids, and sterols in many cellular pathways, including cell signaling and transcriptional regulation. Frequently, lipids from these various classes work together to achieve defined cellular outcomes. Specific mitochondrial lipids are critical for proper assembly of the electron transport chain complexes and for effective responses to mitochondrial damage, including maintenance of mitochondrial protein homeostasis, regulation of mitophagy, and induction of apoptosis. In this Minireview, we will primarily focus on mitochondrial lipid signaling mediated by lipid-protein interactions.
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Affiliation(s)
- Jason R Nielson
- From the Departments of Biochemistry and.,Pharmacology and Toxicology, University of Utah, Salt Lake City, Utah 84112
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5
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Qualitative and Quantitative In Vitro Analysis of Phosphatidylinositol Phosphatase Substrate Specificity. Methods Mol Biol 2016; 1376:55-75. [PMID: 26552675 DOI: 10.1007/978-1-4939-3170-5_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Phosphoinositides compromise a family of eight membrane lipids which play important roles in many cellular signaling pathways. Signaling through phosphoinositides has been shown in a variety of cellular functions such cell proliferation, cell growth, apoptosis, and vesicle trafficking. Phospholipid phosphatases regulate cell signaling by modifying the concentration of phosphoinositides and their dephosphorylated products. To understand the role of individual lipid phosphatases in phosphoinositide turnover and functional signaling, it is crucial to determine the substrate specificity of the lipid phosphatase of interest. In this chapter we describe how the substrate specificity of an individual lipid phosphatase can be qualitatively and quantitatively measured in an in vitro radiometric assay. In addition, we specify the different expression systems and purification methods required to produce the necessary yield and functionality in order to further characterize these enzymes. The outstanding versatility and sensitivity of this assay system are yet unmatched and are therefore currently considered the standard of the field.
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Abstract
Membranes protect cells from the surrounding environment but also provide a means for the optimization of processes such as metabolism, signalling, or mitogenesis. Membrane structure and function is determined by its molecular composition. How lipid species define membrane properties is discussed in this introductory chapter.
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Affiliation(s)
- Marek Cebecauer
- Department of Biophysical Chemistry, J. Heyrovsky Institute of Physical Chemistry, The Academy of Sciences of the Czech Republic, Dolejškova 2155/3, 182 23, Prague 8, Czech Republic,
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7
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Bista P, Pawlowski M, Cerina M, Ehling P, Leist M, Meuth P, Aissaoui A, Borsotto M, Heurteaux C, Decher N, Pape HC, Oliver D, Meuth SG, Budde T. Differential phospholipase C-dependent modulation of TASK and TREK two-pore domain K+ channels in rat thalamocortical relay neurons. J Physiol 2014; 593:127-44. [PMID: 25556792 DOI: 10.1113/jphysiol.2014.276527] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2014] [Accepted: 09/23/2014] [Indexed: 01/10/2023] Open
Abstract
KEY POINTS During the behavioural states of sleep and wakefulness thalamocortical relay neurons fire action potentials in high frequency bursts or tonic sequences, respectively. The modulation of specific K(+) channel types, termed TASK and TREK, allows these neurons to switch between the two modes of activity. In this study we show that the signalling lipids phosphatidylinositol 4,5-bisphosphate (PIP2) and diacylglycerol (DAG), which are components of their membrane environment, switch on and shut off TREK and TASK channels, respectively. These channel modulations contribute to a better understanding of the molecular basis of the effects of neurotransmitters such as ACh which are released by the brainstem arousal system. The present report introduces PIP2 and DAG as new elements of signal transduction in the thalamus. The activity of two-pore domain potassium channels (K2P ) regulates the excitability and firing modes of thalamocortical (TC) neurons. In particular, the inhibition of two-pore domain weakly inwardly rectifying K(+) channel (TWIK)-related acid-sensitive K(+) (TASK) channels and TWIK-related K(+) (TREK) channels, as a consequence of the stimulation of muscarinic ACh receptors (MAChRs) which are coupled to phosphoinositide-specific phospholipase C (PLCβ), induces a shift from burst to tonic firing. By using a whole cell patch-clamp approach, the contribution of the membrane-bound second messenger molecules phosphatidylinositol 4,5-bisphosphate (PIP2 ) and diacylglycerol (DAG) acting downstream of PLCβ was probed. The standing outward current (ISO ) was used to monitor the current through TASK and TREK channels in TC neurons. By exploiting different manoeuvres to change the intracellular PIP2 level in TC neurons, we here show that the scavenging of PIP2 (by neomycin) results in an increased muscarinic effect on ISO whereas increased availability of PIP2 (inclusion to the patch pipette; histone-based carrier) decreased muscarinic signalling. The degree of muscarinic inhibition specifically depends on phosphatidylinositol phosphate (PIP) and PIP2 but no other phospholipids (phosphatidic acid, phosphatidylserine). The use of specific blockers revealed that PIP2 is targeting TREK but not TASK channels. Furthermore, we demonstrate that the inhibition of TASK channels is induced by the application of the DAG analogue 1-oleoyl-2-acetyl-sn-glycerol (OAG). Under current clamp conditions the activation of MAChRs and PLCβ as well as the application of OAG resulted in membrane depolarization, while PIP2 application via histone carrier induced a hyperpolarization. These results demonstrate a differential role of PIP2 and DAG in K2P channel modulation in native neurons which allows a fine-tuned inhibition of TREK (via PIP2 depletion) and TASK (via DAG) channels following MAChR stimulation.
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Affiliation(s)
- Pawan Bista
- Institut für Physiologie I, Westfälische Wilhelms-Universität, Robert-Koch-Straße 27a, D-48149, Münster, Germany
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8
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Martin TFJ. PI(4,5)P₂-binding effector proteins for vesicle exocytosis. Biochim Biophys Acta Mol Cell Biol Lipids 2014; 1851:785-93. [PMID: 25280637 DOI: 10.1016/j.bbalip.2014.09.017] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 09/20/2014] [Accepted: 09/23/2014] [Indexed: 12/27/2022]
Abstract
PI(4,5)P₂participates directly in priming and possibly in fusion steps of Ca²⁺-triggered vesicle exocytosis. High concentration nanodomains of PI(4,5)P₂reside on the plasma membrane of neuroendocrine cells. A subset of vesicles that co-localize with PI(4,5)P₂ domains appear to undergo preferential exocytosis in stimulated cells. PI(4,5)P₂directly regulates vesicle exocytosis by recruiting and activating PI(4,5)P₂-binding proteins that regulate SNARE protein function including CAPS, Munc13-1/2, synaptotagmin-1, and other C2 domain-containing proteins. These PI(4,5)P₂effector proteins are coincidence detectors that engage in multiple interactions at vesicle exocytic sites. The SNARE protein syntaxin-1 also binds to PI(4,5)P₂, which promotes clustering, but an activating role for PI(4,5)P₂in syntaxin-1 function remains to be fully characterized. Similar principles underlie polarized constitutive vesicle fusion mediated in part by the PI(4,5)P₂-binding subunits of the exocyst complex (Sec3, Exo70). Overall, focal vesicle exocytosis occurs at sites landmarked by PI(4,5)P2, which serves to recruit and/or activate multifunctional PI(4,5)P₂-binding proteins. This article is part of a Special Issue entitled Phosphoinositides.
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Affiliation(s)
- Thomas F J Martin
- Biochemistry Department, University of Wisconsin, 433 Babcock Drive, Madison, WI 53706, USA.
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Abstract
Proteins synthesised at the endoplasmic reticulum (ER) have to undergo a number of consecutive and coordinated steps to reach the Golgi complex. To understand the dynamic complexity of ER-to-Golgi transport at the structural and molecular level, light microscopy approaches are fundamental tools that allow in vivo observations of protein dynamics and interactions of fluorescent proteins in living cells. Imaging protein and organelle dynamics close to the ultra-structural level became possible by combining light microscopy with electron microscopy analyses or super-resolution light microscopy methods. Besides, increasing evidence suggests that the early secretory pathway is tightly connected to other cellular processes, such as signal transduction, and quantitative information at the systems level is fundamental to achieve a comprehensive molecular understanding of these connections. High-throughput microscopy in fixed and living cells in combination with systematic perturbation of gene expression by, e.g. RNA interference, will open new avenues to gain such an understanding of the early secretory pathway at the systems level. In this Commentary, we first outline examples that revealed the dynamic organisation of ER-to-Golgi transport in living cells. Next, we discuss the use of advanced imaging methods in studying ER-to-Golgi transport and, finally, delineate the efforts in understanding ER-to-Golgi transport at the systems level.
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Affiliation(s)
- Fatima Verissimo
- European Molecular Biology Laboratory, Cell Biology and Cell Biophysics Unit, Meyerhofstraße 1, 69117 Heidelberg, Germany
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10
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Reversi A, Loeser E, Subramanian D, Schultz C, De Renzis S. Plasma membrane phosphoinositide balance regulates cell shape during Drosophila embryo morphogenesis. ACTA ACUST UNITED AC 2014; 205:395-408. [PMID: 24798734 PMCID: PMC4018783 DOI: 10.1083/jcb.201309079] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The ratio of different phosphoinositide species coordinates actomyosin contractility and plasma membrane expansion during tissue morphogenesis, thus ensuring proper cell shape. Remodeling of cell shape during morphogenesis is driven by the coordinated expansion and contraction of specific plasma membrane domains. Loss of this coordination results in abnormal cell shape and embryonic lethality. Here, we show that plasma membrane lipid composition plays a key role in coordinating plasma membrane contraction during expansion. We found that an increase in PI(4,5)P2 levels caused premature actomyosin contraction, resulting in the formation of shortened cells. Conversely, acute depletion of PI(4,5)P2 blocked plasma membrane expansion and led to premature actomyosin disassembly. PI(4,5)P2-mediated contractility is counteracted by PI(3,4,5)P3 and the zygotic gene bottleneck, which acts by limiting myosin recruitment during plasma membrane expansion. Collectively, these data support a model in which the ratio of PI(4,5)P2/PI(3,4,5)P3 coordinates actomyosin contractility and plasma membrane expansion during tissue morphogenesis, thus ensuring proper cell shape.
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Affiliation(s)
- Alessandra Reversi
- European Molecular Biology Laboratory (EMBL) Heidelberg, 69117 Heidelberg, Germany
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11
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Dividing cells regulate their lipid composition and localization. Cell 2014; 156:428-39. [PMID: 24462247 PMCID: PMC3909459 DOI: 10.1016/j.cell.2013.12.015] [Citation(s) in RCA: 215] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 10/16/2013] [Accepted: 12/04/2013] [Indexed: 12/18/2022]
Abstract
Although massive membrane rearrangements occur during cell division, little is known about specific roles that lipids might play in this process. We report that the lipidome changes with the cell cycle. LC-MS-based lipid profiling shows that 11 lipids with specific chemical structures accumulate in dividing cells. Using AFM, we demonstrate differences in the mechanical properties of live dividing cells and their isolated lipids relative to nondividing cells. In parallel, systematic RNAi knockdown of lipid biosynthetic enzymes identified enzymes required for division, which highly correlated with lipids accumulated in dividing cells. We show that cells specifically regulate the localization of lipids to midbodies, membrane-based structures where cleavage occurs. We conclude that cells actively regulate and modulate their lipid composition and localization during division, with both signaling and structural roles likely. This work has broader implications for the active and sustained participation of lipids in basic biology. Systematic, comprehensive lipid analyses in dividing cells and midbodies AFM shows dividing cells and their lipids have specific physical properties Screen of lipid biosynthetic enzymes reveals 23 genes required for division Perturbing lipid levels alters actin cytoskeleton and cell stiffness
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12
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Simon MLA, Platre MP, Assil S, van Wijk R, Chen WY, Chory J, Dreux M, Munnik T, Jaillais Y. A multi-colour/multi-affinity marker set to visualize phosphoinositide dynamics in Arabidopsis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2014; 77:322-37. [PMID: 24147788 PMCID: PMC3981938 DOI: 10.1111/tpj.12358] [Citation(s) in RCA: 172] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Revised: 09/06/2013] [Accepted: 10/15/2013] [Indexed: 05/18/2023]
Abstract
Phosphatidylinositolphosphates (PIPs) are phospholipids that contain a phosphorylated inositol head group. PIPs represent a minor fraction of total phospholipids, but are involved in many regulatory processes, such as cell signalling and intracellular trafficking. Membrane compartments are enriched or depleted in specific PIPs, providing a unique composition for these compartments and contributing to their identity. The precise subcellular localization and dynamics of most PIP species is not fully understood in plants. Here, we designed genetically encoded biosensors with distinct relative affinities and expressed them stably in Arabidopsis thaliana. Analysis of this multi-affinity 'PIPline' marker set revealed previously unrecognized localization of various PIPs in root epidermis. Notably, we found that PI(4,5)P2 is able to localize PIP2 -interacting protein domains to the plasma membrane in non-stressed root epidermal cells. Our analysis further revealed that there is a gradient of PI4P, with the highest concentration at the plasma membrane, intermediate concentration in post-Golgi/endosomal compartments, and the lowest concentration in the Golgi. Finally, we also found a similar gradient of PI3P from high in late endosomes to low in the tonoplast. Our library extends the range of available PIP biosensors, and will allow rapid progress in our understanding of PIP dynamics in plants.
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Affiliation(s)
- Mathilde Laetitia Audrey Simon
- CNRS, INRA, ENS Lyon, UCBL, Université de Lyon, Laboratoire de Reproduction et Développement des Plantes, 46 Allée d'Italie, 69364 Lyon Cedex 07, France
| | - Matthieu Pierre Platre
- CNRS, INRA, ENS Lyon, UCBL, Université de Lyon, Laboratoire de Reproduction et Développement des Plantes, 46 Allée d'Italie, 69364 Lyon Cedex 07, France
| | - Sonia Assil
- CIRI, International Center for Infectiology Research; Université de Lyon; Inserm, U1111; Ecole Normale Supérieure de Lyon; CNRS, UMR5308; LabEx Ecofect, Lyon, F-69007, France
| | - Ringo van Wijk
- University of Amsterdam, Swammerdam Institute for Life Sciences, Section Plant Physiology, Postbus 94215, 1090 GE Amsterdam, The Netherlands
| | - William Yawei Chen
- Plant Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Joanne Chory
- Plant Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
- The Howard Hughes Medical Institute, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Marlène Dreux
- CIRI, International Center for Infectiology Research; Université de Lyon; Inserm, U1111; Ecole Normale Supérieure de Lyon; CNRS, UMR5308; LabEx Ecofect, Lyon, F-69007, France
| | - Teun Munnik
- University of Amsterdam, Swammerdam Institute for Life Sciences, Section Plant Physiology, Postbus 94215, 1090 GE Amsterdam, The Netherlands
| | - Yvon Jaillais
- CNRS, INRA, ENS Lyon, UCBL, Université de Lyon, Laboratoire de Reproduction et Développement des Plantes, 46 Allée d'Italie, 69364 Lyon Cedex 07, France
- For correspondence (Phone +33 4 72 72 86 09; fax +33 4 72 72 86 00; )
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Wegner CS, Schink KO, Stenmark H, Brech A. Monitoring phosphatidylinositol 3-phosphate in multivesicular endosome biogenesis. Methods Enzymol 2013; 534:3-23. [PMID: 24359945 DOI: 10.1016/b978-0-12-397926-1.00001-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
The endocytic pathway comprises a variety of intracellular compartments that regulate sorting of internalized plasma membrane constituents as well as extracellular material. A major sorting station on this route is the early endosome, where internalized receptors destined for degradation are trafficked from the limiting membrane into the interior of the endosome by formation of intraluminal vesicles (ILVs). This invagination and budding process leads to the biogenesis of multivesicular endosomes (MVEs). The formation of ILVs depends on the sequential action of protein complexes that are partly recruited in a phosphatidylinositol 3-phosphate (PtdIns3P)-dependent manner. The underlying mechanisms of the biogenesis of MVEs are still not completely understood and it is therefore of great interest to study the sorting of PtdIns3P in this process. We are describing several methods to track these sorting events by both light and electron microscopy and combination of both methods.
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Affiliation(s)
- Catherine Sem Wegner
- Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo, Oslo, Norway; Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
| | - Kay Oliver Schink
- Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo, Oslo, Norway; Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
| | - Harald Stenmark
- Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo, Oslo, Norway; Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway
| | - Andreas Brech
- Centre for Cancer Biomedicine, Faculty of Medicine, University of Oslo, Oslo, Norway; Institute for Cancer Research, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway.
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14
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Sun Y, Thapa N, Hedman AC, Anderson RA. Phosphatidylinositol 4,5-bisphosphate: targeted production and signaling. Bioessays 2013; 35:513-22. [PMID: 23575577 DOI: 10.1002/bies.201200171] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Phosphatidylinositol 4,5-bisphosphate (PI4,5P(2)) is a key lipid signaling molecule that regulates a vast array of biological activities. PI4,5P(2) can act directly as a messenger or can be utilized as a precursor to generate other messengers: inositol trisphosphate, diacylglycerol, or phosphatidylinositol 3,4,5-trisphosphate. PI4,5P(2) interacts with hundreds of different effector proteins. The enormous diversity of PI4,5P(2) effector proteins and the spatio-temporal control of PI4,5P(2) generation allow PI4,5P(2) signaling to control a broad spectrum of cellular functions. PI4,5P(2) is synthesized by phosphatidylinositol phosphate kinases (PIPKs). The array of PIPKs in cells enables their targeting to specific subcellular compartments through interactions with targeting factors that are often PI4,5P(2) effectors. These interactions are a mechanism to define spatial and temporal PI4,5P(2) synthesis and the specificity of PI4,5P(2) signaling. In turn, the regulation of PI4,5P(2) effectors at specific cellular compartments has implications for understanding how PI4,5P(2) controls cellular processes and its role in diseases.
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Affiliation(s)
- Yue Sun
- University of Wisconsin-Madison, School of Medicine and Public Health, Madison, WI, USA
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15
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Liu SJ, Wen Q, Tang LJ, Jiang JH. Phospholipid–Graphene Nanoassembly as a Fluorescence Biosensor for Sensitive Detection of Phospholipase D Activity. Anal Chem 2012; 84:5944-50. [DOI: 10.1021/ac300539s] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Si-Jia Liu
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics,
College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, People’s Republic
of China
| | - Qian Wen
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics,
College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, People’s Republic
of China
| | - Li-Juan Tang
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics,
College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, People’s Republic
of China
| | - Jian-Hui Jiang
- State Key Laboratory of Chemo/Bio-Sensing and Chemometrics,
College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, People’s Republic
of China
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16
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Bru M, Kotkar SP, Kar N, Köhn M. Development of a solid phase synthesis strategy for soluble phosphoinositide analogues. Chem Sci 2012. [DOI: 10.1039/c2sc01061e] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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17
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Urban PL, Chang CH, Wu JT, Chen YC. Microscale MALDI Imaging of Outer-Layer Lipids in Intact Egg Chambers from Drosophila melanogaster. Anal Chem 2011; 83:3918-25. [DOI: 10.1021/ac200481j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Pawel L. Urban
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan
| | - Chia-Hsien Chang
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan
| | - June-Tai Wu
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan
| | - Yu-Chie Chen
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan
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