Structure Of Partially Denatured Bacteriorhodopsin In Detergent Micelles And Structural Changes During Its Refolding

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Structure of Partially Denatured Bacteriorhodopsin in Detergent Micelles and Structural Changes During Its Refolding

Author : Venkatramanan Krishnamani
Publisher :
ISBN 13 : 9781124208350
Total Pages : 120 pages
Book Rating : 4.2/5 (83 download)

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Book Synopsis Structure of Partially Denatured Bacteriorhodopsin in Detergent Micelles and Structural Changes During Its Refolding by : Venkatramanan Krishnamani

Download or read book Structure of Partially Denatured Bacteriorhodopsin in Detergent Micelles and Structural Changes During Its Refolding written by Venkatramanan Krishnamani and published by . This book was released on 2010 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The partially denatured state of bacteriorhodopsin (bR), a model hepta-helical integral membrane protein that acts as a proton pump in the membranes of Halobacterium salinarum, in SDS micelles was studied to understand the sequence dependent structural perturbations. Two-frequency pulsed electron paramagnetic resonance (EPR) (double electron-electron spin resonance, DEER) investigation combined with molecular dynamics (MD) of denaturation of individual helices of bR was used in an attempt to unravel the structural details of bR in sodium dodecyl sulfate (SDS) micelles. The results from the DEER experiments reveal a discrete heterogeneous ensemble of structures of bR in the detergent. The MD simulations show the role of charged residues in unfolding and the partitioning preference of the helices in SDS micelles. The refolding kinetics from this partially denatured starting state to a functional regenerated state using stopped flow continuous wave EPR measurements revealed that the secondary structure formation is faster than 140 msec and further helix association events followed a two step process. Majority of the structural changes happen before the functional recovery of the protein in the first step with a time constant of 3-5 sec followed by minor structural changes occurring in concert with the retinal chromophore recovery with varying association time constants for each helix pair.

Membrane Structural Biology

Author : Mary Luckey
Publisher : Cambridge University Press
ISBN 13 : 0521856558
Total Pages : 345 pages
Book Rating : 4.5/5 (218 download)

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Book Synopsis Membrane Structural Biology by : Mary Luckey

Download or read book Membrane Structural Biology written by Mary Luckey and published by Cambridge University Press. This book was released on 2008-03-17 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cutting-edge text providing a foundation for membrane biology suitable for advanced students and working scientists.

Molecular Biology of the Cell

Author :
Publisher :
ISBN 13 : 9780815332183
Total Pages : 0 pages
Book Rating : 4.3/5 (321 download)

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Book Synopsis Molecular Biology of the Cell by :

Download or read book Molecular Biology of the Cell written by and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Physics of Amphiphilic Layers

Author : Jacques Meunier
Publisher : Springer Science & Business Media
ISBN 13 : 3642832024
Total Pages : 408 pages
Book Rating : 4.6/5 (428 download)

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Book Synopsis Physics of Amphiphilic Layers by : Jacques Meunier

Download or read book Physics of Amphiphilic Layers written by Jacques Meunier and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amphiphilic layers play essential roles in the behaviour of a great variety of disperse systems such as micelles, microemulsions and vesicles. They can also exist as isolated mono- or bilayers, or constitute extended liquid crystalline structures. Although the properties of these different systems may at first sight seem unrelated, theoretical interpretations of them depend on several common concepts. This was the reason for bringing together scientists working in this area for the International Winter School on the Physics of Amphiphilic Layers, which was held at Les Houches, 10-18 February, 1987. The topics treated in the proceedings volume are mono- and bilayers, interactive forces between layers (with special emphasis on steric forces), ordered structures (in particular swollen lamellar phases and defects), vesicles, micelles (including polymer-like systems), microemulsions (especially random bicontinuous structures) and porous media. The importance of thermal fluctuations in the amphiphilic layers is stressed. Recent results are presented and literature references allow readers not familiar with the subject to find any background information they require.

Membrane Protein Crystallization

Author :
Publisher : Academic Press
ISBN 13 : 0080961592
Total Pages : 334 pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis Membrane Protein Crystallization by :

Download or read book Membrane Protein Crystallization written by and published by Academic Press. This book was released on 2009-05-29 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume of Current Topics in Membranes focuses on Membrane Protein Crystallization, beginning with a review of past successes and general trends, then further discussing challenges of mebranes protein crystallization, cell free production of membrane proteins and novel lipids for membrane protein crystallization. This publication also includes tools to enchance membrane protein crystallization, technique advancements, and crystallization strategies used for photosystem I and its complexes, establishing Membrane Protein Crystallization as a needed, practical reference for researchers.

Protein Targeting and Translocation

Author : D. A. Phoenix
Publisher : Princeton University Press
ISBN 13 : 1400865018
Total Pages : 305 pages
Book Rating : 4.4/5 (8 download)

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Book Synopsis Protein Targeting and Translocation by : D. A. Phoenix

Download or read book Protein Targeting and Translocation written by D. A. Phoenix and published by Princeton University Press. This book was released on 2014-07-14 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: Protein targeting is a fast-moving field that has encompassed areas from biophysics to molecular biology to try to gain insight into how proteins are directed to their final functional location and how such macromolecules are able to cross semi-permeable membrane barriers during their journey. This text reviews our current state of knowledge regarding the interaction of proteins at the membrane interface and the assembly of proteins into biological membranes, before proceeding to look at targeting pathways in both prokaryotic and eukaryotic systems. The reviews have been written by some of the leading researchers in the field, with contributions from around the world and with more than 1,800 references. The text is aimed at graduate students and at researchers with an interest in protein targeting, but may also be of use to final-year undergraduates. Originally published in 1999. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.

Abstracts, 20th Annual Meetings, April 6-April 25, 1991

Author :
Publisher :
ISBN 13 :
Total Pages : 328 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Abstracts, 20th Annual Meetings, April 6-April 25, 1991 by :

Download or read book Abstracts, 20th Annual Meetings, April 6-April 25, 1991 written by and published by . This book was released on 1991 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Crystallization of Membrane Proteins

Author : Hartmut Michel
Publisher : CRC Press
ISBN 13 : 1351088173
Total Pages : 343 pages
Book Rating : 4.3/5 (51 download)

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Book Synopsis Crystallization of Membrane Proteins by : Hartmut Michel

Download or read book Crystallization of Membrane Proteins written by Hartmut Michel and published by CRC Press. This book was released on 2018-01-18 with total page 343 pages. Available in PDF, EPUB and Kindle. Book excerpt: The precise knowledge of the structure of biological macromolecules forms the basis of understanding their function and their mechanism of action. It also lays the foundation for rational protein and drug design. The only method to obtain this knowledge is still crystallography. At present, the structures of about 400 proteins are known at or nearly at atomic proteins. However, only two of them are membrane proteins or complexes of the membrane proteins. The reasons for the difference is not the crystals of membrane proteins resists forming special problems when being analysed. The reason is that the membrane proteins resist into forming into well-ordered crystals. The intention of this book is to help to produce well-ordered crystals proteins and to provide guidelines, it is aimed at both biochemists and protein crystallographer‘s.

Study of Bacteriorhodopsin in a Controlled Lipid Environment

Author : Vivien Yeh
Publisher :
ISBN 13 : 9789811312397
Total Pages : pages
Book Rating : 4.3/5 (123 download)

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Book Synopsis Study of Bacteriorhodopsin in a Controlled Lipid Environment by : Vivien Yeh

Download or read book Study of Bacteriorhodopsin in a Controlled Lipid Environment written by Vivien Yeh and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the study of how the properties of nanodiscs, such as lipid composition and size, influence the function of the embedding integral membrane protein, bacteriorhodopsin. The author performed systematic studies to show that the lipid composition and the charge of the hydrophobic head and the structure of hydrophilic tails affect the photocycle pathway of bacteriorhodopsin, which is closely associated with its proton-pumping activity. Furthermore, the author demonstrated a highly efficient method for extracting membrane proteins directly from the biological membrane, preserving protein conformation, function and essential native lipids. This book demonstrates optimization and sample preparation, and presents practical methods of preparing membrane protein-embedded nanodisc samples for biophysical studies, which benefit structural and functional studies in the field of membrane protein characterization, both.

The Hydrophobic Effect

Author : Charles Tanford
Publisher :
ISBN 13 :
Total Pages : 256 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis The Hydrophobic Effect by : Charles Tanford

Download or read book The Hydrophobic Effect written by Charles Tanford and published by . This book was released on 1980-01-18 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: This almost entirely rewritten edition remains the only comprehensive, up-to-date account of the subject available today—with nearly half of all literature references made to work done since 1973. Theoretical treatment of micelle formation has been greatly improved, making it possible to predict (from first principles) the size and size distribution of micelles formed by many simple amphiphiles . . . as well as the critical concentration at which they first form. Defines four distinct modes of association between protein and detergents (or other amphiphiles), and gives a plausible explanation to show why some ionic detergents generally denature proteins while nonionic detergents often do not. Also includes entirely new chapters on serum lipoproteins and on membrane proteins.

Membrane Protein Structure Determination

Author : Jean-Jacques Lacapère
Publisher : Methods in Molecular Biology
ISBN 13 :
Total Pages : 482 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Membrane Protein Structure Determination by : Jean-Jacques Lacapère

Download or read book Membrane Protein Structure Determination written by Jean-Jacques Lacapère and published by Methods in Molecular Biology. This book was released on 2010-08-06 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Membrane proteins, representing nearly 40% of all proteins, are key components of cells involved in many cellular processes, yet only a small number of their structures have been determined. Membrane Protein Structure Determination: Methods and Protocols presents many detailed techniques for membrane protein structure determination used today by bringing together contributions from top experts in the field. Divided into five convenient sections, the book covers various strategies to purify membrane proteins, approaches to get three dimensional crystals and solve the structure by x-ray diffraction, possibilities to gain structural information for a membrane protein using electron microscopy observations, recent advances in nuclear magnetic resonance (NMR), and molecular modelling strategies that can be used either to get membrane protein structures or to move from atomic structure to a dynamic understanding of a molecular functioning mechanism. Written in the highly successful Methods in Molecular BiologyTM series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Comprehensive and easy to use, Membrane Protein Structure Determination: Methods and Protocols serves as an ideal reference for scientists seeking to further our knowledge of these vital and versatile proteins as well as our overall understanding of the complicated world of cell biology.

Bio-nanoimaging

Author : Vladimir N Uversky
Publisher : Academic Press
ISBN 13 : 0123978211
Total Pages : 556 pages
Book Rating : 4.1/5 (239 download)

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Book Synopsis Bio-nanoimaging by : Vladimir N Uversky

Download or read book Bio-nanoimaging written by Vladimir N Uversky and published by Academic Press. This book was released on 2013-11-05 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bio-Nanoimaging: Protein Misfolding & Aggregation provides a unique introduction to both novel and established nanoimaging techniques for visualization and characterization of misfolded and aggregated protein species. The book is divided into three sections covering: - Nanotechnology and nanoimaging technology, including cryoelectron microscopy of beta(2)-microglobulin, studying amyloidogensis by FRET; and scanning tunneling microscopy of protein deposits - Polymorphisms of protein misfolded and aggregated species, including fibrillar polymorphism, amyloid-like protofibrils, and insulin oligomers - Polymorphisms of misfolding and aggregation processes, including multiple pathways of lysozyme aggregation, misfolded intermediate of a PDZ domain, and micelle formation by human islet amyloid polypeptide Protein misfolding and aggregation is a fast-growing frontier in molecular medicine and protein chemistry. Related disorders include cataracts, arthritis, cystic fibrosis, late-onset diabetes mellitus, and numerous neurodegenerative diseases like Alzheimer's and Parkinson's. Nanoimaging technology has proved crucial in understanding protein-misfolding pathologies and in potential drug design aimed at the inhibition or reversal of protein aggregation. Using these technologies, researchers can monitor the aggregation process, visualize protein aggregates and analyze their properties. - Provides practical examples of nanoimaging research from leading molecular biology, cell biology, protein chemistry, biotechnology, genetics, and pharmaceutical labs - Includes over 200 color images to illustrate the power of various nanoimaging technologies - Focuses on nanoimaging techniques applied to protein misfolding and aggregation in molecular medicine

Essential Microbiology

Author : Stuart Hogg
Publisher : John Wiley & Sons
ISBN 13 : 1119978912
Total Pages : 534 pages
Book Rating : 4.1/5 (199 download)

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Book Synopsis Essential Microbiology by : Stuart Hogg

Download or read book Essential Microbiology written by Stuart Hogg and published by John Wiley & Sons. This book was released on 2013-06-10 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Essential Microbiology 2nd Edition is a fully revised comprehensive introductory text aimed at students taking a first course in the subject. It provides an ideal entry into the world of microorganisms, considering all aspects of their biology (structure, metabolism, genetics), and illustrates the remarkable diversity of microbial life by devoting a chapter to each of the main taxonomic groupings. The second part of the book introduces the reader to aspects of applied microbiology, exploring the involvement of microorganisms in areas as diverse as food and drink production, genetic engineering, global recycling systems and infectious disease. Essential Microbiology explains the key points of each topic but avoids overburdening the student with unnecessary detail. Now in full colour it makes extensive use of clear line diagrams to clarify sometimes difficult concepts or mechanisms. A companion web site includes further material including MCQs, enabling the student to assess their understanding of the main concepts that have been covered. This edition has been fully revised and updated to reflect the developments that have occurred in recent years and includes a completely new section devoted to medical microbiology. Students of any life science degree course will find this a concise and valuable introduction to microbiology.

Membrane Protein Purification and Crystallization

Author : Carola Hunte
Publisher : Elsevier
ISBN 13 : 0080536174
Total Pages : 339 pages
Book Rating : 4.0/5 (85 download)

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Book Synopsis Membrane Protein Purification and Crystallization by : Carola Hunte

Download or read book Membrane Protein Purification and Crystallization written by Carola Hunte and published by Elsevier. This book was released on 2003-01-05 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition of Membrane Protein Purification and Crystallization, A Practical Guide is written for bench scientists working in the fields of biochemistry, biology, and proteomic research. This guide presents isolation and crystallization techniques in a concise form, emphasizing the critical aspects unique to membrane proteins. It explains the principles of the methods and provides protocols of general use, permitting researchers and students new to this area to adapt these techniques to their particular needs. This edition is not only an update but is comprised mainly of new contributions. It is the first monograph compiling the essential approaches for membrane protein crystallization, and emphasizes recent progress in production and purification of recombinant membrane proteins. - Provides general guidelines and strategies for isolation and crystallization of membrane proteins - Gives detailed protocols that have wide application, and low specialized equipment needs - Emphasizes recent progress in production and purification of recombinant membrane proteins, especially of histidine-tagged and other affinity-epitope-tagged proteins - Summarizes recent developments of Blue-Native PAGE, a high resolution separation technique, which is independent of the use of recombinant techniques, and is especially suited for proteomic analyses of membrane protein complexes - Gives detailed protocols for membrane protein crystallization, and describes the production and use of antibody fragments for high resolution crystallization - Presents a comprehensive guide to 2D-crystallization of membrane proteins

Experimental Approaches of NMR Spectroscopy

Author : The Nuclear Magnetic Resonance Society of Japan
Publisher : Springer
ISBN 13 : 9811059667
Total Pages : 634 pages
Book Rating : 4.8/5 (11 download)

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Book Synopsis Experimental Approaches of NMR Spectroscopy by : The Nuclear Magnetic Resonance Society of Japan

Download or read book Experimental Approaches of NMR Spectroscopy written by The Nuclear Magnetic Resonance Society of Japan and published by Springer. This book was released on 2017-11-23 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the advanced developments in methodology and applications of NMR spectroscopy to life science and materials science. Experts who are leaders in the development of new methods and applications of life and material sciences have contributed an exciting range of topics that cover recent advances in structural determination of biological and material molecules, dynamic aspects of biological and material molecules, and development of novel NMR techniques, including resolution and sensitivity enhancement. First, this book particularly emphasizes the experimental details for new researchers to use NMR spectroscopy and pick up the potentials of NMR spectroscopy. Second, the book is designed for those who are involved in either developing the technique or expanding the NMR application fields by applying them to specific samples. Third, the Nuclear Magnetic Resonance Society of Japan has organized this book not only for NMR members of Japan but also for readers worldwide who are interested in using NMR spectroscopy extensively.

Biomimetic Membranes for Sensor and Separation Applications

Author : Claus Hélix-Nielsen
Publisher : Springer Science & Business Media
ISBN 13 : 9400721846
Total Pages : 303 pages
Book Rating : 4.4/5 (7 download)

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Book Synopsis Biomimetic Membranes for Sensor and Separation Applications by : Claus Hélix-Nielsen

Download or read book Biomimetic Membranes for Sensor and Separation Applications written by Claus Hélix-Nielsen and published by Springer Science & Business Media. This book was released on 2012-01-02 with total page 303 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the possibilities and challenges in mimicking biological membranes and creating membrane-based sensor and separation devices. Recent advances in developing biomimetic membranes for technological applications will be presented with focus on the use of integral membrane protein mediated transport for sensing and separation. It describes the fundamentals of biosensing as well as separation and shows how the two processes are working in a cooperative manner in biological systems. Biomimetics is a truly cross-disciplinary approach and this is exemplified using the process of forward osmosis will be presented as an illustration of how advances in membrane technology may be directly stimulated by an increased understanding of biological membrane transport. In the development of a biomimetic sensor/separation technology, both channels (ion and water channels) and carriers (transporters) are important. An ideal sensor/separation device requires the supporting biomimetic matrix to be virtually impermeable to anything but the solute in question. In practice, however, a biomimetic support matrix will generally have finite permeabilities to water, electrolytes, and non-electrolytes. These non-protein mediated membrane transport contributions will be presented and the implications for biomimetic device construction will be discussed. New developments in our understanding of the reciprocal coupling between the material properties of the biomimetic matrix and the embedded proteins will be presented and strategies for inducing biomimetic matrix stability will be discussed. Once reconstituted in its final host biomimetic matrix the protein stability also needs to be maintained and controlled. Beta-barrel proteins exemplified by the E. Coli outer membrane channels or small peptides are inherently more stable than alpha-helical bundle proteins which may require additional stabilizing modifications. The challenges associated with insertion and stabilization of alpha-helical bundle proteins including many carriers and ligand and voltage gated ion (and water) channels will be discussed and exemplified using the aquaporin protein. Many biomimetic membrane applications require that the final device can be used in the macroscopic realm. Thus a biomimetic separation device must have the ability to process hundred of liters of permeate in hours – effectively demanding square-meter size membranes. Scalability is a general issue for all nano-inspired technology developments and will be addressed here in the context biomimetic membrane array fabrication. Finally a robust working biomimetic device based on membrane transport must be encapsulated and protected yet allowing massive transport though the encapsulation material. This challenge will be discussed using microfluidic design strategies as examples of how to use microfluidic systems to create and encapsulate biomimetic membranes. The book provides an overview of what is known in the field, where additional research is needed, and where the field is heading.

Membrane Proteins in Aqueous Solutions

Author : JEAN-LUC. POPOT
Publisher : Springer
ISBN 13 : 9783030103248
Total Pages : 738 pages
Book Rating : 4.1/5 (32 download)

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Book Synopsis Membrane Proteins in Aqueous Solutions by : JEAN-LUC. POPOT

Download or read book Membrane Proteins in Aqueous Solutions written by JEAN-LUC. POPOT and published by Springer. This book was released on 2019-07-05 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first to be entirely devoted to the challenging art of handling membrane proteins out of their natural environment, a key process in biological and pharmaceutical research, but one plagued with difficulties and pitfalls. Written by one of the foremost experts in the field, Membrane Proteins in Aqueous Solutions is accessible to any member of a membrane biology laboratory. After presenting the structure, functions, dynamics, synthesis, natural environment and lipid interactions of membrane proteins, the author discusses the principles of extracting them with detergents, the mechanisms of detergent-induced destabilization, countermeasures, and recent progress in developing detergents with weaker denaturing properties. Non-conventional alternatives to detergents, including bicelles, nanodiscs, amphipathic peptides, fluorinated surfactants and amphipols, are described, and their relative advantages and drawbacks are compared. The synthesis and solution properties of the various types of amphipols are presented, as well as the formation and properties of membrane protein/amphipol complexes and the transfer of amphipol-trapped proteins to detergents, nanodiscs, lipidic mesophases, or living cells. The final chapters of the book deal with applications: membrane protein in vitro folding and cell-free expression, solution studies, NMR, crystallography, electron microscopy, mass spectrometry, amphipol-mediated immobilization of membrane proteins, and biomedical applications. Important features of the book include introductory sections describing foundations as well as the state-of-the-art for each of the biophysical techniques discussed, and topical tables which organize a widely dispersed literature. Boxes and annexes throughout the book explain technical aspects, and twelve detailed experimental protocols, ranging from in vitro folding of membrane proteins to single-particle electron cryomicroscopy, have been contributed by and commented on by experienced users. Membrane Proteins in Aqueous Solutions offers a concise, accessible introduction to membrane protein biochemistry and biophysics, as well as comprehensive coverage of the properties and uses of conventional and non-conventional surfactants. It will be useful both in basic and applied research laboratories and as a teaching aid for students, instructors, researchers, and professionals within the field.