Structure and Function Studies on the Herg Potassium Channel Including the Development and Characteriza Tion of Membrane Mimetics
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Table 2. Significant
Table 2. Significant (Q < 0.05 and |d | > 0.5) transcripts from the meta-analysis Gene Chr Mb Gene Name Affy ProbeSet cDNA_IDs d HAP/LAP d HAP/LAP d d IS Average d Ztest P values Q-value Symbol ID (study #5) 1 2 STS B2m 2 122 beta-2 microglobulin 1452428_a_at AI848245 1.75334941 4 3.2 4 3.2316485 1.07398E-09 5.69E-08 Man2b1 8 84.4 mannosidase 2, alpha B1 1416340_a_at H4049B01 3.75722111 3.87309653 2.1 1.6 2.84852656 5.32443E-07 1.58E-05 1110032A03Rik 9 50.9 RIKEN cDNA 1110032A03 gene 1417211_a_at H4035E05 4 1.66015788 4 1.7 2.82772795 2.94266E-05 0.000527 NA 9 48.5 --- 1456111_at 3.43701477 1.85785922 4 2 2.8237185 9.97969E-08 3.48E-06 Scn4b 9 45.3 Sodium channel, type IV, beta 1434008_at AI844796 3.79536664 1.63774235 3.3 2.3 2.75319499 1.48057E-08 6.21E-07 polypeptide Gadd45gip1 8 84.1 RIKEN cDNA 2310040G17 gene 1417619_at 4 3.38875643 1.4 2 2.69163229 8.84279E-06 0.0001904 BC056474 15 12.1 Mus musculus cDNA clone 1424117_at H3030A06 3.95752801 2.42838452 1.9 2.2 2.62132809 1.3344E-08 5.66E-07 MGC:67360 IMAGE:6823629, complete cds NA 4 153 guanine nucleotide binding protein, 1454696_at -3.46081884 -4 -1.3 -1.6 -2.6026947 8.58458E-05 0.0012617 beta 1 Gnb1 4 153 guanine nucleotide binding protein, 1417432_a_at H3094D02 -3.13334396 -4 -1.6 -1.7 -2.5946297 1.04542E-05 0.0002202 beta 1 Gadd45gip1 8 84.1 RAD23a homolog (S. -
Potassium Channels in Epilepsy
Downloaded from http://perspectivesinmedicine.cshlp.org/ on September 28, 2021 - Published by Cold Spring Harbor Laboratory Press Potassium Channels in Epilepsy Ru¨diger Ko¨hling and Jakob Wolfart Oscar Langendorff Institute of Physiology, University of Rostock, Rostock 18057, Germany Correspondence: [email protected] This review attempts to give a concise and up-to-date overview on the role of potassium channels in epilepsies. Their role can be defined from a genetic perspective, focusing on variants and de novo mutations identified in genetic studies or animal models with targeted, specific mutations in genes coding for a member of the large potassium channel family. In these genetic studies, a demonstrated functional link to hyperexcitability often remains elusive. However, their role can also be defined from a functional perspective, based on dy- namic, aggravating, or adaptive transcriptional and posttranslational alterations. In these cases, it often remains elusive whether the alteration is causal or merely incidental. With 80 potassium channel types, of which 10% are known to be associated with epilepsies (in humans) or a seizure phenotype (in animals), if genetically mutated, a comprehensive review is a challenging endeavor. This goal may seem all the more ambitious once the data on posttranslational alterations, found both in human tissue from epilepsy patients and in chronic or acute animal models, are included. We therefore summarize the literature, and expand only on key findings, particularly regarding functional alterations found in patient brain tissue and chronic animal models. INTRODUCTION TO POTASSIUM evolutionary appearance of voltage-gated so- CHANNELS dium (Nav)andcalcium (Cav)channels, Kchan- nels are further diversified in relation to their otassium (K) channels are related to epilepsy newer function, namely, keeping neuronal exci- Psyndromes on many different levels, ranging tation within limits (Anderson and Greenberg from direct control of neuronal excitability and 2001; Hille 2001). -
A Computational Approach for Defining a Signature of Β-Cell Golgi Stress in Diabetes Mellitus
Page 1 of 781 Diabetes A Computational Approach for Defining a Signature of β-Cell Golgi Stress in Diabetes Mellitus Robert N. Bone1,6,7, Olufunmilola Oyebamiji2, Sayali Talware2, Sharmila Selvaraj2, Preethi Krishnan3,6, Farooq Syed1,6,7, Huanmei Wu2, Carmella Evans-Molina 1,3,4,5,6,7,8* Departments of 1Pediatrics, 3Medicine, 4Anatomy, Cell Biology & Physiology, 5Biochemistry & Molecular Biology, the 6Center for Diabetes & Metabolic Diseases, and the 7Herman B. Wells Center for Pediatric Research, Indiana University School of Medicine, Indianapolis, IN 46202; 2Department of BioHealth Informatics, Indiana University-Purdue University Indianapolis, Indianapolis, IN, 46202; 8Roudebush VA Medical Center, Indianapolis, IN 46202. *Corresponding Author(s): Carmella Evans-Molina, MD, PhD ([email protected]) Indiana University School of Medicine, 635 Barnhill Drive, MS 2031A, Indianapolis, IN 46202, Telephone: (317) 274-4145, Fax (317) 274-4107 Running Title: Golgi Stress Response in Diabetes Word Count: 4358 Number of Figures: 6 Keywords: Golgi apparatus stress, Islets, β cell, Type 1 diabetes, Type 2 diabetes 1 Diabetes Publish Ahead of Print, published online August 20, 2020 Diabetes Page 2 of 781 ABSTRACT The Golgi apparatus (GA) is an important site of insulin processing and granule maturation, but whether GA organelle dysfunction and GA stress are present in the diabetic β-cell has not been tested. We utilized an informatics-based approach to develop a transcriptional signature of β-cell GA stress using existing RNA sequencing and microarray datasets generated using human islets from donors with diabetes and islets where type 1(T1D) and type 2 diabetes (T2D) had been modeled ex vivo. To narrow our results to GA-specific genes, we applied a filter set of 1,030 genes accepted as GA associated. -
Transcriptomic Analysis of Native Versus Cultured Human and Mouse Dorsal Root Ganglia Focused on Pharmacological Targets Short
bioRxiv preprint doi: https://doi.org/10.1101/766865; this version posted September 12, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-ND 4.0 International license. Transcriptomic analysis of native versus cultured human and mouse dorsal root ganglia focused on pharmacological targets Short title: Comparative transcriptomics of acutely dissected versus cultured DRGs Andi Wangzhou1, Lisa A. McIlvried2, Candler Paige1, Paulino Barragan-Iglesias1, Carolyn A. Guzman1, Gregory Dussor1, Pradipta R. Ray1,#, Robert W. Gereau IV2, # and Theodore J. Price1, # 1The University of Texas at Dallas, School of Behavioral and Brain Sciences and Center for Advanced Pain Studies, 800 W Campbell Rd. Richardson, TX, 75080, USA 2Washington University Pain Center and Department of Anesthesiology, Washington University School of Medicine # corresponding authors [email protected], [email protected] and [email protected] Funding: NIH grants T32DA007261 (LM); NS065926 and NS102161 (TJP); NS106953 and NS042595 (RWG). The authors declare no conflicts of interest Author Contributions Conceived of the Project: PRR, RWG IV and TJP Performed Experiments: AW, LAM, CP, PB-I Supervised Experiments: GD, RWG IV, TJP Analyzed Data: AW, LAM, CP, CAG, PRR Supervised Bioinformatics Analysis: PRR Drew Figures: AW, PRR Wrote and Edited Manuscript: AW, LAM, CP, GD, PRR, RWG IV, TJP All authors approved the final version of the manuscript. 1 bioRxiv preprint doi: https://doi.org/10.1101/766865; this version posted September 12, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. -
The Developmental and Genetic Architecture of the Sexually
bioRxiv preprint doi: https://doi.org/10.1101/2020.07.24.219840; this version posted July 25, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. 1 Title: The developmental and genetic architecture of the sexually selected male ornament of 2 swordtails 3 4 Authors: Manfred Schartl1,2, Susanne Kneitz3, Jenny Ormanns3, Cornelia Schmidt3, Jennifer L 5 Anderson4, Angel Amores5, Julian Catchen6, Catherine Wilson5, Dietmar Geiger7, Kang Du1,2, Mateo 6 Garcia-Olazábal8, Sudha Sudaram9, Christoph Winkler9, Rainer Hedrich7, Wesley C Warren10, Ronald 7 Walter2, Axel Meyer11 #, John H Postlethwait5 # 8 9 1Developmental Biochemistry, Biocenter, University of Wuerzburg, Am Hubland, 97074 Wuerzburg, 10 Germany 11 2The Xiphophorus Genetic Stock Center, Department of Chemistry and Biochemistry, Texas State 12 University, San Marcos, Texas, TX 78666, USA 13 3Biochemistry and Cell Biology, Biocenter, University of Wuerzburg, Am Hubland, 97074 14 Wuerzburg, Germany 15 4Systematic Biology, Department of Organismal Biology, Uppsala University, Norbyvägen 18D, 752 16 36 Uppsala, Sweden 17 5Institute of Neuroscience, University of Oregon, Eugene, Oregon, OR 97401, USA 18 6Department of Animal Biology, University of Illinois, Urbana, Illlinois, IL 6812, USA 19 7Julius-von-Sachs-Institute for Biosciences, Molecular Plant Physiology and Biophysics, Biocenter, 20 University Würzburg, Julius-von-Sachs-Platz 2, 97082 Würzburg, Germany. 21 8Department of -
Regulation of Ion Channels by Muscarinic Receptors
Regulation of ion channels by muscarinic receptors David A. Brown Department of Neuroscience, Physiology & Pharmacology, University College London, London, WC1E 6BT (UK). Contact address: Professor D.A.Brown, FRS, Department of Neuroscience, Physiology & Pharmacology, University College London, Gower Street, Londin, WC1E 6BT. E-mail: [email protected] Telephone: (+44) (0)20 7679 7297 Mobile (for urgent messages): (+44)(0)7766-236330 Abstract The excitable behaviour of neurons is determined by the activity of their endogenous membrane ion channels. Since muscarinic receptors are not themselves ion channels, the acute effects of muscarinic receptor stimulation on neuronal function are governed by the effects of the receptors on these endogenous neuronal ion channels. This review considers some principles and factors determining the interaction between subtypes and classes of muscarinic receptors with neuronal ion channels, and summarizes the effects of muscarinic receptor stimulation on a number of different channels, the mechanisms of receptor – channel transduction and their direct consequences for neuronal activity. Ion channels considered include potassium channels (voltage-gated, inward rectifier and calcium activated), voltage-gated calcium channels, cation channels and chloride channels. Key words: Ion channels; neuronal excitation and inhibition; pre- and postsynaptic events; muscarinic receptor subtypes; G proteins; transduction mechanisms. Contents. 1. Introduction: some principles of muscarinic receptor – ion channel coupling. 1.2 Some consequences of the indirect link between receptor and ion channel. + The connection between M1Rs and the M-type K channel as a model system 1.2.1 Dynamics of the response 1.2.2 Sensitivity of the response to agonist stimulation 2. Some muscarinic receptor-modulated neural ion channels. -
Ion Channels 3 1
r r r Cell Signalling Biology Michael J. Berridge Module 3 Ion Channels 3 1 Module 3 Ion Channels Synopsis Ion channels have two main signalling functions: either they can generate second messengers or they can function as effectors by responding to such messengers. Their role in signal generation is mainly centred on the Ca2 + signalling pathway, which has a large number of Ca2+ entry channels and internal Ca2+ release channels, both of which contribute to the generation of Ca2 + signals. Ion channels are also important effectors in that they mediate the action of different intracellular signalling pathways. There are a large number of K+ channels and many of these function in different + aspects of cell signalling. The voltage-dependent K (KV) channels regulate membrane potential and + excitability. The inward rectifier K (Kir) channel family has a number of important groups of channels + + such as the G protein-gated inward rectifier K (GIRK) channels and the ATP-sensitive K (KATP) + + channels. The two-pore domain K (K2P) channels are responsible for the large background K current. Some of the actions of Ca2 + are carried out by Ca2+-sensitive K+ channels and Ca2+-sensitive Cl − channels. The latter are members of a large group of chloride channels and transporters with multiple functions. There is a large family of ATP-binding cassette (ABC) transporters some of which have a signalling role in that they extrude signalling components from the cell. One of the ABC transporters is the cystic − − fibrosis transmembrane conductance regulator (CFTR) that conducts anions (Cl and HCO3 )and contributes to the osmotic gradient for the parallel flow of water in various transporting epithelia. -
Characterization of Cardiac Iks Channel Gating Using Voltage Clamp Fluorometry Jeremiah D. Osteen Submitted in Partial Fulfillme
Characterization of cardiac IKs channel gating using voltage clamp fluorometry Jeremiah D. Osteen Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Graduate School of Arts and Sciences COLUMBIA UNIVERSITY 2012 © 2012 Jeremiah D. Osteen All rights reserved ABSTRACT Characterization of cardiac IKs channel gating using voltage clamp fluorometry Jeremiah D. Osteen Voltage-gated ion channels make up a superfamily of membrane proteins involved in selectively or non-selectively conducting charged ions, which can carry current in and out of cells, in response to changes in membrane voltage. Currents carried by ion channels influence the voltage across the cell membrane, which can trigger changes in the conductance of neighboring voltage-gated channels. In this way, signals, measured as transient changes in voltage called action potentials, can be sent through and between cells in order to transmit information quickly and efficiently throughout excitable systems. My thesis work focuses on elucidating the mechanisms underlying the voltage-dependent gating of a member of the voltage gated potassium (Kv) channel family, KCNQ1 (Kv7.1). Like other members of the voltage gated potassium family, the KCNQ1 channel is made up of four subunits, each containing a voltage sensing domain and a pore-forming domain. Tetrameric channels form with a single central pore domain, and four structurally independent voltage sensing domains. KCNQ1 plays roles both in maintenance of the membrane potential (it forms a leak current in epithelial cells throughout the body) as well as a very important role in resting membrane potential reestablishment (it forms a slowly activating current important in action potential repolarization in cardiac cells). -
The KCNQ5 Potassium Channel Mediates a Component of the Afterhyperpolarization Current in Mouse Hippocampus
The KCNQ5 potassium channel mediates a component of the afterhyperpolarization current in mouse hippocampus Anastassios V. Tzingounisa,1,2, Matthias Heidenreichb,1, Tatjana Kharkovetsc, Guillermo Spitzmaulb, Henrik S. Jensend,3, Roger A. Nicolla,4, and Thomas J. Jentschb,c,4 aDepartment of Cellular and Molecular Pharmacology and Department of Physiology, University of California, San Francisco, CA 94143; bLeibniz-Institut für Molekulare Pharmakologie (FMP) and Max-Delbrück-Centrum für Molekulare Medizin (MDC), Berlin, D-13125, Germany; cZentrum für Molekulare Neurobiologie (ZMNH), Universität Hamburg, Hamburg, D-20251, Germany; and dDepartment of Medical Physiology, The Panum Institute, University of Copenhagen, Copenhagen, DK-2200, Denmark Contributed by Roger A. Nicoll, April 8, 2010 (sent for review February 18, 2010) Mutations in KCNQ2 and KCNQ3 voltage-gated potassium channels brainstem (18). Unlike KCNQ2 and KCNQ3, the function of lead to neonatal epilepsy as a consequence of their key role in KCNQ5 in the brain remains unknown and no neurological dis- regulating neuronal excitability. Previous studies in the brain have orders have been attributed to it. Given KCNQ5’s similar bio- focused primarily on these KCNQ family members, which contribute physical properties to other members of the KCNQ family, to M-currents and afterhyperpolarization conductances in multiple KCNQ5 may also contribute to M-currents (15, 16). To elucidate brain areas. In contrast, the function of KCNQ5 (Kv7.5), which also the physiological functions of KCNQ5 and test whether KCNQ5 displays widespread expression in the brain, is entirely unknown. also has a role in AHP currents, we generated knock-in (KI) mice Here, we developed mice that carry a dominant negative mutation carrying a dominant negative (dn) mutation in KCNQ5. -
Ion Channels
UC Davis UC Davis Previously Published Works Title THE CONCISE GUIDE TO PHARMACOLOGY 2019/20: Ion channels. Permalink https://escholarship.org/uc/item/1442g5hg Journal British journal of pharmacology, 176 Suppl 1(S1) ISSN 0007-1188 Authors Alexander, Stephen PH Mathie, Alistair Peters, John A et al. Publication Date 2019-12-01 DOI 10.1111/bph.14749 License https://creativecommons.org/licenses/by/4.0/ 4.0 Peer reviewed eScholarship.org Powered by the California Digital Library University of California S.P.H. Alexander et al. The Concise Guide to PHARMACOLOGY 2019/20: Ion channels. British Journal of Pharmacology (2019) 176, S142–S228 THE CONCISE GUIDE TO PHARMACOLOGY 2019/20: Ion channels Stephen PH Alexander1 , Alistair Mathie2 ,JohnAPeters3 , Emma L Veale2 , Jörg Striessnig4 , Eamonn Kelly5, Jane F Armstrong6 , Elena Faccenda6 ,SimonDHarding6 ,AdamJPawson6 , Joanna L Sharman6 , Christopher Southan6 , Jamie A Davies6 and CGTP Collaborators 1School of Life Sciences, University of Nottingham Medical School, Nottingham, NG7 2UH, UK 2Medway School of Pharmacy, The Universities of Greenwich and Kent at Medway, Anson Building, Central Avenue, Chatham Maritime, Chatham, Kent, ME4 4TB, UK 3Neuroscience Division, Medical Education Institute, Ninewells Hospital and Medical School, University of Dundee, Dundee, DD1 9SY, UK 4Pharmacology and Toxicology, Institute of Pharmacy, University of Innsbruck, A-6020 Innsbruck, Austria 5School of Physiology, Pharmacology and Neuroscience, University of Bristol, Bristol, BS8 1TD, UK 6Centre for Discovery Brain Science, University of Edinburgh, Edinburgh, EH8 9XD, UK Abstract The Concise Guide to PHARMACOLOGY 2019/20 is the fourth in this series of biennial publications. The Concise Guide provides concise overviews of the key properties of nearly 1800 human drug targets with an emphasis on selective pharmacology (where available), plus links to the open access knowledgebase source of drug targets and their ligands (www.guidetopharmacology.org), which provides more detailed views of target and ligand properties. -
Anti-Potassium Channel KV1.7 Produced in Rabbit, Affinity Isolated Antibody
Anti-Potassium Channel KV1.7 produced in rabbit, affinity isolated antibody Catalog Number K4639 Product Description Reagent + Anti-Potassium Channel Kv1.7 (Voltage gated K Supplied as lyophilized powder from phosphate channel KV1.7; KCNA7) is developed in rabbit using as buffered saline, pH 7.4, containing 1% BSA and an immunogen peptideTTRKAQEIHGKAPG (C) 0.05 % sodium azide corresponding to residues 2-15 of mouse Kv1.7. The antibody is directed against an epitope located in the Reconstitution intracellular loop near the N-terminus of mouse Kv1.7. Reconstitute the lyophilized vial with 50mL or 200 mL The antibody is affinity purified on immobilized antigen. deionized water, depending on package size. Further dilutions should be made using a carrier protein, such Anti-Kv1.7antibody recognizes mouse Kv1.7 (gene as BSA (1-3%). Kcna7 ID: 16495). It does not cross-react with human Kv1.7. The antibody has been used in immunoblotting. Precautions and Disclaimer This product is for R&D use only, not for drug, + The Kv1.7 voltage-gated K channel is a member of the household, or other uses. Please consult the Material + Shaker family of K channels that includes eight Safety Data Sheet for information regarding hazards members (Kv1.1- Kv1.8). Kv1.7 possesses the signature and safe handling practices. structure of the voltage-dependent K+ channels: six membrane-spanning domains and intracellular N- and Storage/Stability C-termini. As with other channels of the Shaker Lyophilized powder can be stored intact at room subfamily, Kv1.7 can readily form heteromers with other temperature for several weeks. -
Comparative Transcriptome Profiling of the Human and Mouse Dorsal Root Ganglia: an RNA-Seq-Based Resource for Pain and Sensory Neuroscience Research
bioRxiv preprint doi: https://doi.org/10.1101/165431; this version posted October 13, 2017. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. Title: Comparative transcriptome profiling of the human and mouse dorsal root ganglia: An RNA-seq-based resource for pain and sensory neuroscience research Short Title: Human and mouse DRG comparative transcriptomics Pradipta Ray 1, 2 #, Andrew Torck 1 , Lilyana Quigley 1, Andi Wangzhou 1, Matthew Neiman 1, Chandranshu Rao 1, Tiffany Lam 1, Ji-Young Kim 1, Tae Hoon Kim 2, Michael Q. Zhang 2, Gregory Dussor 1 and Theodore J. Price 1, # 1 The University of Texas at Dallas, School of Behavioral and Brain Sciences 2 The University of Texas at Dallas, Department of Biological Sciences # Corresponding authors Theodore J Price Pradipta Ray School of Behavioral and Brain Sciences School of Behavioral and Brain Sciences The University of Texas at Dallas The University of Texas at Dallas BSB 14.102G BSB 10.608 800 W Campbell Rd 800 W Campbell Rd Richardson TX 75080 Richardson TX 75080 972-883-4311 972-883-7262 [email protected] [email protected] Number of pages: 27 Number of figures: 9 Number of tables: 8 Supplementary Figures: 4 Supplementary Files: 6 Word count: Abstract = 219; Introduction = 457; Discussion = 1094 Conflict of interest: The authors declare no conflicts of interest Patient anonymity and informed consent: Informed consent for human tissue sources were obtained by Anabios, Inc. (San Diego, CA). Human studies: This work was approved by The University of Texas at Dallas Institutional Review Board (MR 15-237).