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Ion Channel Reconstitution

Author: C. Miller

Publisher: Springer Science & Business Media

Published: 2013-11-09

Total Pages: 579

ISBN-13: 1475713614

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.

Ion Channels: Channel Biochemistry, Reconstitution, and Function

Author: Daniel L. Minor

Publisher: Elsevier

Published: 2021-06-03

Total Pages: 356

ISBN-13: 0323853749

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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

Ion Channels

Author: Bernardo Rudy

Publisher: Gulf Professional Publishing

Published: 1997-09-18

Total Pages: 944

ISBN-13: 9780126016956

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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.

Ion Channels: Channel Biochemistry, Reconstitution, and Function

Author:

Publisher: Academic Press

Published: 2021-05-29

Total Pages: 358

ISBN-13: 0323853757

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Ion Channels

Author: T. Narahashi

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 299

ISBN-13: 146157305X

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In the past few years, the scientific community has witnessed rapid and significant progress in the study of ion channels. Technological advance ment in biophysics, molecular biology, and immunology has been greatly accelerated, making it possible to conduct experiments that were deemed very difficult if not impossible in the past. For example, patch-clamp tech niques can now be used to measure ionic currents generated by almost any type of cell, thereby allowing us to analyze single-channel events. It is now possible to incorporate purified ion channel components into lipid bilayers to reconstitute an "excitable membrane." Gene cloning and monoclonal antibody techniques provide us with new approaches to the study of the molecular structure of ion channels. A variety of drugs have now been found or are suspected to interact with ion channels to exert therapeutic effects. In addition to the classical exam ples, as represented by local anesthetics, many other drugs, including cal cium antagonists, psychoactive drugs, cardiac drugs, and anticonvulsants, have been shown to alter the ion channel function. For certain pesticides such as pyrethroids and DDT, sodium channels are clearly the major target site. Many diseases of excitable tissues are known to be associated with, if not caused by, dysfunction of ion channels; these include cardiac ar rhythmias, angina pectoris, cystic fibrosis, myotonia, and epilepsies, to men tion only a few. Channel dysfunction can now be studied due to theoretical and technological developments in this area.

Nuclear Magnetic Resonance of Biological Macromolecules, Part C

Author:

Publisher: Academic Press

Published: 2005-04-20

Total Pages: 672

ISBN-13: 9780121827991

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The critically acclaimed laboratory standard, Methods in Enzymology, is one of the most highly respected publications in the field of biochemistry. Since 1955, each volume has been eagerly awaited, frequently consulted, and praised by researchers and reviewers alike. The series contains much material still relevant today - truly an essential publication for researchers in all fields of life sciences. Nuclear Magnetic Resonance of Biological Macromolecules, Part C is written with a "hands-on" perspective. That is, practical applications with critical evaluations of methodologies and experimental considerations needed to design, execute, and interpret NMR experiments pertinent to biological molecules. * One of the most highly respected publications in the field of biochemistry since 1955 * Frequently consulted, and praised by researchers and reviewers alike * Truly an essential publication for anyone in any field of the life sciences

Ion Channels

Author: T. Narahashi

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 347

ISBN-13: 1461573025

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A wealth of information has been accumulated about the function of ion channels of excitable cells since the extensive and pioneering voltage clamp studies by Hodgkin, Huxley, and Katz 36 years ago. The study of ion chan nels has now reached a stage at which a quantum jump in progress is antici pated. There are many good reasons for this. Patch clamp techniques origi nally developed by Neher and Sakmann 12 years ago have made it possible to study the function of ion channels in a variety of cells. Membrane ionic currents can now be recorded practically from many types of cells using the whole-cell patch clamp technique. The opening and closing of individual ion channels can be analyzed using the single-channel patch clamp method. Techniques have also been developed to incorporate purified ion channels into lipid bilayers to reconstitute an "excitable membrane. " Advanced tech niques developed in molecular biology, genetics, and immunology, such as gene cloning and the use of monoclonal antibodies, are now being applied to the study of ion channels. A variety of drugs have now been found or are suspected to interact with ion channels to exert therapeutic effects. In addition to the classical exam ples, as represented by local anesthetics, many other drugs, including cal cium antagonists, psychoactive drugs, cardiac drugs, and anticonvulsants, shown to alter ion channel function. For certain pesticides such as have been pyrethroids and DDT, sodium channels are clearly the major target site.

TRP Ion Channel Function in Sensory Transduction and Cellular Signaling Cascades

Author: Wolfgang B. Liedtke, MD, PH.D.

Publisher: CRC Press

Published: 2006-09-29

Total Pages: 502

ISBN-13: 1420005847

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Since the first TRP ion channel was discovered in Drosophila melanogaster in 1989, the progress made in this area of signaling research has yielded findings that offer the potential to dramatically impact human health and wellness. Involved in gateway activity for all five of our senses, TRP channels have been shown to respond to a wide range of st

Ionic Channels in Cells and Model Systems

Author: Ramón Latorre

Publisher: Springer Science & Business Media

Published: 2013-11-11

Total Pages: 446

ISBN-13: 1468450778

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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.

Ion Channels and Disease

Author: Frances M. Ashcroft

Publisher: Academic Press

Published: 1999-10-20

Total Pages: 505

ISBN-13: 0080535216

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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