Download or read book Ion Channel Reconstitution written by C. Miller and published by Springer Science & Business Media. This book was released on 2013-11-09 with total page 579 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is now over 30 years since the idea of ion-conducting pores burst on the elec trophysiological scene, 15 years since these were generalIy realized to be mem brane-spanning proteins, and 10 years since the first observations of single ion channels from higher organisms were made. During the past 5 years, several integral membrane channel proteins have been purified in a functionalIy competent state: the nicotinic acetylcholine receptor, the Na + channel, mitochondrial "VDAC," and a variety of porins. The stage is thus set to attack ion channels in the same ways that biochemists have been attacking enzymes for decades: isolation folIowed by functional analysis in as simple a system as possible, with a view towards understanding the molecular mechanisms ofthe protein's behavior and how this is related to the underlying molecular structure. This is always a daunting task, alI the more so with ion channels because of our still primitive and scanty understanding of channel structures and because of the difficulty in iso lating functionally active channel proteins. In this volume, which can be considered a biochemically slanted companion to Sakmann and Neher's Single-Channel Recording, I have tried to present a view of the current landscape of ion-channel reconstitution. These chapters illustrate not only the different approaches and techniques of the major practitioners of ion channel reconstitution but, as importantly, the varied motivations for doing this kind of work.
Download or read book Ion Channel Reconstitution Platform Allowing Simultaneous Recording from Multiple Bilayer Sites written by Shankar Ramakrishnan and published by . This book was released on 2011 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT The purpose of this study is to demonstrate that stable lipid bilayers can be set up on an array of silicon micropores and can be used as sites for self-inserting ion-channel proteins which can be studied independently of each other. In course of this study an acrylic based holder was designed and machined to ensure leak-free fluidic access to the silicon micropores and physical isolation of the individual array channels. To measure the ion-channel currents, we simulated, designed and manufactured low-noise transimpedance amplifiers and support circuits based on published patch clamp amplifier designs, using currently available surface-mount components. This was done in order to achieve a reduction in size and costs as well as isolation of individual channels without the need for multiplexing of the input. During the experiments performed, stable bilayers were formed across an array of four vertically mounted 30 m silicon micropores and OmpF porins were added for self insertion in each of the bilayers. To further demonstrate the independence of these bilayer recording sites, the antibiotic Ampicillin (2.5 mM) was added to one of the fluidic wells. The ionic current in each of the wells was recorded simultaneously. Sub-conductance states of Ompf porin were observed in two of the measurement sites. In addition, the conductance steps in the site containing the antibiotic could be clearly seen to be larger compared to those of the unmodified site. This is due to the transient blocking of ion flow through the porin due to translocation of the antibiotic. Based on this demonstration, ion-channel array reconstitution is a potential method for efficient electrophysiological characterization of different types of ion-channels simultaneously as well as for studying membrane permeation processes.
Download or read book Ion Channels Channel Biochemistry Reconstitution and Function written by and published by Academic Press. This book was released on 2021-05-29 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ion Channels Part A, Volume 651 in the Methods in Enzymology series, highlights new advances in the field with this new volume presenting interesting chapters on a variety of new developments on the topic. Each chapter is written by an international board of authors. - Provides the authority and expertise of leading contributors from an international board of authors - Presents the latest release in the Methods in Enzymology series
Download or read book Ion Channels written by Bernardo Rudy and published by Gulf Professional Publishing. This book was released on 1997-09-18 with total page 944 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern applications of electrophysiologica techniques; Expression of ion channels; Expression of ion channels in Xenopus oocytes; Expression of ion channels using other systems; Reconstruction of ion channels in lipid bilayers; Recording of ion channels of cellular organelles and miroorganisms; Data storage and analysis.
Download or read book Reconstitution of Mammalian Ion Channels in Droplet Bilayers written by Abha Jeurkar and published by . This book was released on 2012 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ion channel studies are important for scientific characterization of cellular processes and for the purpose of drug discovery. The sessile droplet bilayer platform allows for simple, fast, inexpensive and high-yield formation of artificial lipid bilayers and reconstitution of ion channels. We validated this bilayer formation platform with mammalian ion channels like Chloride Intracellular Channel 1 (CLIC1) and Voltage-gated potassium channel 1.2 (Kv1.2). Ion channel synthesis using traditional bacterial expression systems is a complex and time consuming process and it limits the number of eukaryotic proteins that can be expressed therein. We explored the use of in vitro protein synthesis and plasma membrane fractionation of commercially available mammalian cells for expressing and reconstituting ion channel proteins in planar lipid bilayers.
Download or read book Ionic Channels in Cells and Model Systems written by Ramón Latorre and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is based on a series of lectures for a course on ionic channels held in Santiago, Chile, on November 17-20, 1984. It is intended as a tutorial guide on the properties, function, modulation, and reconstitution of ionic channels, and it should be accessible to graduate students taking their first steps in this field. In the presentation there has been a deliberate emphasis on the spe cific methodologies used toward the understanding of the workings and function of channels. Thus, in the first section, we learn to "read" single channel records: how to interpret them in the theoretical frame of kinetic models, which information can be extracted from gating currents in re lation to the closing and opening processes, and how ion transport through an open channel can be explained in terms of fluctuating energy barriers. The importance of assessing unequivocally the origin and purity of mem brane preparations and the use of membrane vesicles and optical tech niques in the stUGY of ionic channels are also discussed in this section. The patch-clamp technique has made it possible to study ion channels in a variety of different cells and tissues not amenable to more conven tional electrophysiological methods. The second section, therefore, deals with the use of this technique in the characterization of ionic channels in different types of cells, ranging from plant protoplasts to photoreceptors.
Download or read book Ion Channels Channel Production and Optical Methods written by and published by Academic Press. This book was released on 2021-06-05 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ion Channels Part B, Volume 652 in the Methods in Enzymology series, highlights new advances in the field, with this new volume presenting interesting chapters on a variety of topics, including NMDAR, Pannexin, and CALHM, Making NaV1.4 and NaV1.7, TRPVs, Purification native nAChRs, GABAR Radu Aricescu, TRPV5/2, NaV1.5, KATP, TRPA1, TREK-1, SARS-CoV-2 3a ion channel, Ion channel conformational dynamics by encoded unnatural amino acid, Fluorescence lifetime measurement of absolute membrane potential, Fluorescent Toxins as Activity Sensors, FRET Analyses of Ion Channel Protein-Protein Interactions, Control of Ion Channel Gating with Photo-Switchable Tweezers, and Counting Subunits in Kv Channel Complexes. Provides the authority and expertise of leading contributors from an international board of authors Presents the latest release in the Methods in Enzymology series
Download or read book Planar Lipid Bilayers BLM s and Their Applications written by H.T. Tien † and published by Elsevier. This book was released on 2003-02-27 with total page 1045 pages. Available in PDF, EPUB and Kindle. Book excerpt: The lipid bilayer is the most basic structural element of cell membranes. A wide range of topics are covered in this volume, from the origin of the lipid bilayer concept, to current applications and experimental techniques. Each chapter in this volume is self-contained and describes a group's research, providing detailed methodology and key references useful for researchers. Lipid bilayer research is of great interest to many because of it's interdisciplinary nature.·Provides an overview of decades of research on the lipid bilayer·38 contributed chapters, by leading scientists, cover a wide range of topics in one authoritative volume·Book coincides with 40th anniversary of BLM
Download or read book Essential Ion Channel Methods written by P. Michael Conn and published by Academic Press. This book was released on 2010-07-22 with total page 629 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid growth of interest and research activity in ion channels is indicative of their fundamental importance in the maintenance of the living state. This volume was prepared with a view toward providing a sampling of the range of molecular and physical methods that are significant for the study of ion channels. As part of the Reliable Lab Solutions series, Essential Ion Channel Methods brings together chapters from volumes 293 and 294 of Methods in Enzymology. The chapters have been selected by the editor and updated, when possible, by their original authors to include new research and references. The result is a set of chapters which make use of graphics, comparisons to other methods, and provide tricks and approaches that make it possible to adapt methods to other systems. Methods are presented in a fashion that allows their replication by individuals new to the field, yet providing valuable information for seasoned investigators. - Highlights top downloaded and cited chapters, authored by pioneers in the field and enhanced with graphics and easy to follow methods - Loaded with detailed protocols developed and used by leaders in the field - Refines, organizes and updates popular methods from one of our top selling series, Methods in Enzymology
Download or read book Piezo Channels written by and published by Academic Press. This book was released on 2017-07-17 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Piezo Channels, Volume 79, the latest volume in the Current Topics in Membranes series provides the necessary membrane research to assist readers in discovering the current state of a particular field and future directions. New chapters in the updated volume include A Tour de Force: The Discovery, Properties, and Function of Piezo Channels, Piezo1 Channels in Vascular Development and the Sensing of Shear Stress, the Origin of the Force: The Force-From-Lipids Principle Applied to Piezo Channels, Genetic Diseases of PIEZO1 and PIEZO2 Dysfunction, and The Structural Basis for Sensing by the Piezo1 Protein. Users of this series will find an up-to-date presentation of the current knowledge in the field of Piezo Channels. - Written by leading experts in the field - Contains original material, both textual and illustrative, that make it a very relevant reference - Presented in a very comprehensive manner - Ideal reference for both researchers in the field and general readers who will find this book to be relevant and up-to-date
Download or read book Ion Channels and Disease written by Frances M. Ashcroft and published by Academic Press. This book was released on 1999-10-20 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ion channels are membrane proteins that act as gated pathways for the movement of ions across cell membranes. They play essential roles in the physiology of all cells. In recent years, an ever-increasing number of human and animal diseases have been found to result from defects in ion channel function. Most of these diseases arise from mutations in the genes encoding ion channel proteins, and they are now referred to as the channelopathies. Ion Channels and Disease provides an informative and up-to-date account of our present understanding of ion channels and the molecular basis of ion channel diseases. It includes a basic introduction to the relevant aspects of molecular biology and biophysics and a brief description of the principal methods used to study channelopathies. For each channel, the relationship between its molecular structure and its functional properties is discussed and ways in which genetic mutations produce the disease phenotype are considered. This book is intended for research workers and clinicians, as well as graduates and advanced undergraduates. The text is clear and lively and assumes little knowledge, yet it takes the reader to frontiers of what is currently known about this most exciting and medically important area of physiology. - Introduces the relevant aspects of molecular biology and biophysics - Describes the principal methods used to study channelopathies - Considers single classes of ion channels with summaries of the physiological role, subunit composition, molecular structure and chromosomal location, plus the relationship between channel structure and function - Looks at those diseases associated with defective channel structures and regulation, including mutations affecting channel function and to what extent this change in channel function can account for the clinical phenotype
Download or read book Expression and Analysis of Recombinant Ion Channels written by Jeffrey J. Clare and published by John Wiley & Sons. This book was released on 2006-08-21 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Filling the gap created over the past five years, during which many new techniques have entered the market, this book is directed at both the new and the experienced ion channel researcher wishing to learn more about the considerations and methods for studying recombinant ion channels. These latest developments are covered here for the first time, contributed by editors and authors working for major pharmaceutical companies and who routinely apply these techniques in their daily work. The first three chapters cover the use of the Xenopus oocyte expression system for structure-function studies, from basic approaches for manipulating ion channel cDNAs to more specialized but powerful techniques. This is followed by reviews of strategies and methodologies available for expressing channels in mammalian cells and for their analysis by patch-clamp electrophysiology. Chapters 6 to 8 review the latest methodologies for ion channel drug discovery, including high throughput screening using fluorescence and luminescence, as well as automated planar array electrophysiology. The remaining two chapters focus on approaches for determining ion channel crystal structures and on computational approaches to understanding channel mechanisms at atomic resolution. Rather than provide detailed protocols, indicated by references in each chapter, the authors provide a comprehensive and easily accessible overview of the techniques involved, reviewing underlying principles and providing working guidelines as well as an understanding of the key theoretical and practical considerations associated with each topic. In each case, this practical advice is illustrated by real life examples, taken either from the author's own experience or from key examples in the literature, providing valuable practical hints not found elsewhere. The result is a compendium of practical ion channel information that will prove a valuable resource to academic and industrial workers alike.
Download or read book Stable Reconstitution of an Endogenous Ion Channel for Structural Studie written by Gayathri Jeyasankar and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ion Channels written by James D. Stockand and published by Springer Science & Business Media. This book was released on 2008-02-04 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: The diverse applications in this volume range from the study of allosteric regulation of ion channel activity using a classic mutagenesis approach, to the study of channel subunit stoichiometry using a novel biophysical approach based on fluorescence resonance energy transfer. Highlights include methods for heterologous expression of ion channels in cells, for determining channel structure-function, and for studying channel regulation.
Download or read book Vertebrate Hair Cells written by Ruth Eatock and published by Springer Science & Business Media. This book was released on 2006-07-01 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Springer Handbook of Auditory Research presents a series of compreh- sive and synthetic reviews of the fundamental topics in modern auditory - search. The volumes are aimed at all individuals with interests in hearing research including advanced graduate students, postdoctoral researchers, and clinical investigators. The volumes are intended to introduce new investigators to important aspects of hearing science and to help established investigators to better understand the fundamental theories and data in ?elds of hearing that they may not normally follow closely. Each volume presents a particular topic comprehensively, and each serves as a synthetic overview and guide to the literature. As such, the chapters present neither exhaustive data reviews nor original research that has not yet appeared in peer-reviewed journals. The volumes focus on topics that have developed a solid data and conceptual foundation rather than on those for which a literature is only beginning to develop. New research areas will be covered on a timely basis in the series as they begin to mature.
Download or read book Reconstitution of an Ion Channel Complex Needed for Mechanosensation in Caenorhabditis Elegans written by Glen Ernstrom and published by . This book was released on 2003 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanosensitive Ion Channels written by Andre Kamkin and published by Springer Science & Business Media. This book was released on 2007-10-06 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book explores the latest data dealing with mechanosensitive channels research results. It was compiled by a group of internationally recognized scientists leading in the field of mechanosensitive ion channels or mechanically gated channels and signaling cascades research. Key problems of cell mechanobiology are also discussed. As a whole, the volume dwells on the major issues of mechanical stress influencing the ion channels and intracellular signaling pathways.
