A Novel Approach To Characterize The Membrane Disrupting Activity Of Antimicrobial Peptides Using 2h Solid State Nmr Of Whole Escherichia Coli PDF Download
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Author | : James Pius |
Publisher | : |
Total Pages | : 204 |
Release | : 2012 |
Genre | : Bacterial cell walls |
ISBN | : |
Download A Novel Approach to Characterize the Membrane Disrupting Activity of Antimicrobial Peptides Using 2H Solid-state NMR of Whole Escherichia Coli Book in PDF, ePub and Kindle
Author | : Katsumi Matsuzaki |
Publisher | : Springer |
Total Pages | : 304 |
Release | : 2019-04-12 |
Genre | : Medical |
ISBN | : 9811335885 |
Download Antimicrobial Peptides Book in PDF, ePub and Kindle
This book presents an overview of antimicrobial peptides (AMPs), their mechanisms of antimicrobial action, other activities, and various problems that must still be overcome regarding their clinical application. Divided into four major parts, the book begins with a general overview of AMPs (Part I), and subsequently discusses the various mechanisms of antimicrobial action and methods for researching them (Part 2). It then addresses a range of activities other than antimicrobial action, such as cell penetration, antisepsis, anticancer, and immunomodulatory activities (Part 3), and explores the prospects of clinical application from various standpoints such as the selective toxicity, design, and discovery of AMPs (Part 4). A huge number of AMPs have been discovered in plants, insects, and vertebrates including humans, and constitute host defense systems against invading pathogenic microorganisms. Consequently, many attempts have been made to utilize AMPs as antibiotics. AMPs could help to solve the urgent problem of drug-resistant bacteria, and are also promising with regard to sepsis and cancer therapy. Gathering a wealth of information, this book will be a bible for all those seeking to develop antibiotics, anti-sepsis, or anticancer agents based on AMPs.
Author | : Nury Paula Santisteban Vela |
Publisher | : |
Total Pages | : |
Release | : 2019 |
Genre | : |
ISBN | : |
Download Interaction of Antimicrobial Peptides with Bacterial Cell Envelopes Book in PDF, ePub and Kindle
Antimicrobial peptides (AMPs) are small chains of amino acids with the ability to cause bacterial death. AMPs are usually amphiphilic but diverse in charge and structure. The mechanism or mechanisms that AMPs implement to kill bacteria are still under discussion. Studies in model membranes have widely demonstrated the capacity of AMPs to interact with and disrupt the bacterial cell membrane. There are however, good reasons to suspect that AMP interactions with nonmembrane components of bacteria are important. For instance, there is an enormous discrepancy between the peptide to lipid molar ratio (P:L) necessary to generate membrane disruption in model systems (~ 1:100), and the P:L necessary to stop bacterial growth, i.e. the minimal inhibitory concentration (MIC) (~ 10- 100:1). One potential explanation for this discrepancy is that AMPs may interact with non-membrane components of the bacterial cell envelope. The peptidoglycan (PGN) layer is one of the primary non-membrane components of Gram-positive bacterial cell envelopes and is responsible for cell shape and stability. Currently, there is an open discussion about whether PGN can entrap AMPs and prevent them from reaching the cell membrane or, instead promote the accumulation of AMPs on the cell membrane. The primary experimental approach employed in this thesis was 2H NMR spectroscopy of intact bacteria with 2H-labeled membranes. Specifically, since the quadrupolar splittings obtained from the spectra are proportional to the order parameter of the lipid acyl chains, the spectra reflect the structure and dynamics of the membrane. In particular, 2H NMR spectroscopy allows us to characterize the disruption of lipid bilayers caused by AMPs. In this study, different methods to grow 2H-membrane-enriched bacteria were optimized to obtain 2H NMR spectra of E. coli LA8, E. coli JM109 and B. subtilis. Additionally, 2H NMR was used to observe the level of disruption of the cell membrane of B. subtilis caused by the presence of different AMPs, MSI-78 and BP100. Both MSI-78 and BP100 caused the same level of membrane disruption at similar concentrations. Separately, comparison of the 2H NMR spectra of B. subtilis with intact and compromised PGN layers showed no differences. The lack of change in the spectra of PGN-compromised and PGN intact bacteria indicates that there is no change in the dynamics or structure of the lipid bilayer even with a weakened PGN layer. Finally, the disruption caused by MSI-78 and BP100 was measured in B. subtilis with a compromised PGN layer. The results indicate that there is no change in the level of membrane disruption caused by MSI-78 and BP100 when the PGN layer is partially removed.
Author | : The Nuclear Magnetic Resonance Society of Japan |
Publisher | : Springer |
Total Pages | : 634 |
Release | : 2017-11-23 |
Genre | : Science |
ISBN | : 9811059667 |
Download Experimental Approaches of NMR Spectroscopy Book in PDF, ePub and Kindle
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.
Author | : Raffaello Verardi |
Publisher | : |
Total Pages | : 445 |
Release | : 2011 |
Genre | : Bilayer lipid membranes |
ISBN | : |
Download Biophysical Characterization of Membrane Proteins and Antimicrobial Peptides by Solution and Solid-state NMR Spectroscopy Book in PDF, ePub and Kindle
Author | : Tony Romeo |
Publisher | : Springer Science & Business Media |
Total Pages | : 302 |
Release | : 2008-02-26 |
Genre | : Medical |
ISBN | : 3540754180 |
Download Bacterial Biofilms Book in PDF, ePub and Kindle
Throughout the biological world, bacteria thrive predominantly in surface-attached, matrix-enclosed, multicellular communities or biofilms, as opposed to isolated planktonic cells. This choice of lifestyle is not trivial, as it involves major shifts in the use of genetic information and cellular energy, and has profound consequences for bacterial physiology and survival. Growth within a biofilm can thwart immune function and antibiotic therapy and thereby complicate the treatment of infectious diseases, especially chronic and foreign device-associated infections. Modern studies of many important biofilms have advanced well beyond the descriptive stage, and have begun to provide molecular details of the structural, biochemical, and genetic processes that drive biofilm formation and its dispersion. There is much diversity in the details of biofilm development among various species, but there are also commonalities. In most species, environmental and nutritional conditions greatly influence biofilm development. Similar kinds of adhesive molecules often promote biofilm formation in diverse species. Signaling and regulatory processes that drive biofilm development are often conserved, especially among related bacteria. Knowledge of such processes holds great promise for efforts to control biofilm growth and combat biofilm-associated infections. This volume focuses on the biology of biofilms that affect human disease, although it is by no means comprehensive. It opens with chapters that provide the reader with current perspectives on biofilm development, physiology, environmental, and regulatory effects, the role of quorum sensing, and resistance/phenotypic persistence to antimicrobial agents during biofilm growth.
Author | : Yutaka Ito |
Publisher | : Royal Society of Chemistry |
Total Pages | : 322 |
Release | : 2019-12-09 |
Genre | : Science |
ISBN | : 1839160934 |
Download In-cell NMR Spectroscopy Book in PDF, ePub and Kindle
In-cell NMR spectroscopy is a relatively new field. Despite its short history, recent in-cell NMR-related publications in major journals indicate that this method is receiving significant general attention. This book provides the first informative work specifically focused on in-cell NMR. It details the historical background of in-cell NMR, host cells for in-cell NMR studies, methods for in-cell biological techniques and NMR spectroscopy, applications, and future perspectives. Researchers in biochemistry, biophysics, molecular biology, cell biology, structural biology as well as NMR analysts interested in biological applications will all find this book valuable reading.
Author | : Paul Lloyd-Williams |
Publisher | : CRC Press |
Total Pages | : 306 |
Release | : 1997-04-23 |
Genre | : Medical |
ISBN | : 9780849391422 |
Download Chemical Approaches to the Synthesis of Peptides and Proteins Book in PDF, ePub and Kindle
Organic chemists working on the synthesis of natural products have long found a special challenge in the preparation of peptides and proteins. However, more reliable, more efficient synthetic preparation methods have been developed in recent years. This reference evaluates the most important synthesis methods available today, and also considers methods that show promise for future applications. This text describes the state of the art in efficient synthetic methods for the synthesis of both natural and artificial large peptide and protein molecules. Subjects include an introduction to basic topics, linear solid-phase synthesis of peptides, peptide synthesis in solution, convergent solid-phase synthesis, methods for the synthesis of branched peptides, formation of disulfide bridges, and more. The book emphasizes strategies and tactics that must be considered for the successful synthesis of peptides.
Author | : Andrea Giuliani |
Publisher | : Methods in Molecular Biology |
Total Pages | : 448 |
Release | : 2010-03-23 |
Genre | : Medical |
ISBN | : |
Download Antimicrobial Peptides Book in PDF, ePub and Kindle
In this book, leading investigators present a broad, up-to-date collection of current research and experimental methods for the isolation, characterization, production, and optimization of AMPs. The book covers a rapidly expanding field of research.
Author | : J.-M. Ghuysen |
Publisher | : Elsevier |
Total Pages | : 607 |
Release | : 1994-02-09 |
Genre | : Science |
ISBN | : 0080860877 |
Download Bacterial Cell Wall Book in PDF, ePub and Kindle
Studies of the bacterial cell wall emerged as a new field of research in the early 1950s, and has flourished in a multitude of directions. This excellent book provides an integrated collection of contributions forming a fundamental reference for researchers and of general use to teachers, advanced students in the life sciences, and all scientists in bacterial cell wall research. Chapters include topics such as: Peptidoglycan, an essential constituent of bacterial endospores; Teichoic and teichuronic acids, lipoteichoic acids, lipoglycans, neural complex polysaccharides and several specialized proteins are frequently unique wall-associated components of Gram-positive bacteria; Bacterial cells evolving signal transduction pathways; Underlying mechanisms of bacterial resistance to antibiotics.