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Author: Sara Bobone
Publisher: Springer
ISBN: 3319064347
Category : Science
Languages : en
Pages : 147
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Book Description
In her thesis, Sara Bobone outlines spectroscopic studies of antimicrobial peptides (AMPs) which are promising lead compounds for drugs used to fight multidrug resistant bacteria. Bobone shows that AMPs interact with liposomes and she clarifies the structure of pores formed by one of these molecules. These results help us to understand how AMPs are selective for bacterial membranes and how their activity can be finely tuned by modifying their sequence. Findings which solve several conundrums debated in the literature for years. In addition, Bobone uses liposomes as nanotemplates for the photopolymerization of hydrogels - exploiting the self- assembly properties of phospholipids. Bobone was able to trap an enzyme using nanometeric particles, while still allowing its activity by the diffusion of substrates and products through the network of the polymer. The innovative nano devices described in this thesis could solve many of the hurdles still hampering the therapeutic application of protein-based drugs.
Author: Sara Bobone
Publisher: Springer
ISBN: 3319064347
Category : Science
Languages : en
Pages : 147
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Book Description
In her thesis, Sara Bobone outlines spectroscopic studies of antimicrobial peptides (AMPs) which are promising lead compounds for drugs used to fight multidrug resistant bacteria. Bobone shows that AMPs interact with liposomes and she clarifies the structure of pores formed by one of these molecules. These results help us to understand how AMPs are selective for bacterial membranes and how their activity can be finely tuned by modifying their sequence. Findings which solve several conundrums debated in the literature for years. In addition, Bobone uses liposomes as nanotemplates for the photopolymerization of hydrogels - exploiting the self- assembly properties of phospholipids. Bobone was able to trap an enzyme using nanometeric particles, while still allowing its activity by the diffusion of substrates and products through the network of the polymer. The innovative nano devices described in this thesis could solve many of the hurdles still hampering the therapeutic application of protein-based drugs.
Author: Bruce Alberts
Publisher:
ISBN: 9780815332183
Category : Cytology
Languages : en
Pages : 0
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Book Description
Author: Sidney A. Simon
Publisher: Academic Press
ISBN: 0080925855
Category : Science
Languages : en
Pages : 606
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Book Description
This volume contains a comprehensive overview of peptide-lipid interactions by leading researchers. The first part covers theoretical concepts, experimental considerations, and thermodynamics. The second part presents new results obtained through site-directed EPR, electron microscopy, NMR, isothermal calorimetry, and fluorescence quenching. The final part covers problems of biological interest, including signal transduction, membrane transport, fusion, and adhesion. Key Features * world-renowned experts * state-of-the-art experimental methods * monolayers, bilayers, biological membranes * theoretical aspects and computer simulations * rafts * synaptic transmission * membrane fusion * signal transduction
Author: Joachim Koch
Publisher: Springer Science & Business Media
ISBN: 3662092298
Category : Science
Languages : en
Pages : 192
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Book Description
Proteins interacting with diverse ligands - proteins, peptides or DNA - are the basic principles underlying many biological processes, such as antigen-antibody binding, signal transduction or receptor binding. The technique of oligopeptide synthesis on a cellulose membrane and the subsequent binding assays allow the investigation of protein interactions. A particular advantage of these peptide arrays (SPOT - technology) is the high number of oligopeptide probes that can be tested in parallel. Detailed protocols for peptide synthesis, and the analysis of protein-protein, protein-DNA interactions as well as epitope mapping are presented in this manual. It is ideally suited not only for basic research laboratories but also for diagnostic and therapeutic applications since many diseases are related to dysfunctions in protein recognition and binding.
Author: Ali Tavassoli
Publisher: Royal Society of Chemistry
ISBN: 178801569X
Category : Science
Languages : en
Pages : 357
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Book Description
Protein-protein interactions (PPI) are at the heart of the majority of cellular processes, and are frequently dysregulated or usurped in disease. Given this central role, the inhibition of PPIs has been of significant interest as a means of treating a wide variety of diseases. However, there are inherent challenges in developing molecules capable of disrupting the relatively featureless and large interfacial areas involved. Despite this, there have been a number of successes in this field in recent years using both traditional drug discovery approaches and innovative, interdisciplinary strategies using novel chemical scaffolds. This book comprehensively covers the various aspects of PPI inhibition, encompassing small molecules, peptidomimetics, cyclic peptides, stapled peptides and macrocycles. Illustrated throughout with successful case studies, this book provides a holistic, cutting-edge view of the subject area and is ideal for chemical biologists and medicinal chemists interested in developing PPI inhibitors.
Author:
Publisher:
ISBN:
Category : Membranes (Biology)
Languages : en
Pages : 499
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Book Description
This volume will address several related aspects of peptide interactions with membranes. It will consider model theoretical and experimental systems in order to define the ‘reaction space’ that is possible and where appropriate with relevance to fundamental questions in cell biology, including how peptides and proteins behave within biological membranes. The topics covered include: Theoretical and experimental comparisons of simple peptide-membrane systems ; Theoretical and experimental studies of complex peptide-membrane systems ; Behaviour and interactions of proteins and peptides with and within membranes ; Peptide-membrane interactions and biotechnology.
Author: Shushan He
Publisher:
ISBN:
Category :
Languages : en
Pages : 111
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Book Description
The structure of cellular membranes gives rise to important biological phenomena, and understanding the (de)mixing behavior of multicomponent lipid bilayers is an important step toward unraveling the nature of spatial composition heterogeneities in cellular membranes and their role in biological function. In this dissertation we focus on the spatial organization and compositional heterogeneity of model membrane systems and their interaction with small, biologically relevant peptides. I employed both coarse-grained and atomistic molecular dynamics simulations to study the composition phase diagram of a quaternary mixture of phospholipids and cholesterol, as well as to sample the configurational space of peptide-membrane interactions. I investigate the mechanisms controlling membrane spatial heterogeneity and membrane protein interaction. This work yields important new insight into both the structural properties of lipid bilayer systems with spatial and compositional heterogeneity at vastly different length scales, which has prompted numerous publications in the field seeking for a plausible mechanism. This work will also provide perspectives on configurations of the PAP248-286 peptide upon interacting with membranes, which, despite its importance for human health, has not received as much attention from the research community as other amyloid-forming peptides. In this wide-open field such simulations will have significant scientific impact.
Author:
Publisher:
ISBN: 9781788019149
Category : Science
Languages : en
Pages : 498
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Book Description
This volume will address several related aspects of peptide interactions with membranes. It will consider model theoretical and experimental systems with relevance to fundamental questions in cell biology, including how peptides and proteins behave within biological membranes.
Author: James Eric Shaw
Publisher:
ISBN: 9780494393802
Category :
Languages : en
Pages : 278
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Book Description
Processes occurring at membrane interfaces are important for cellular and biological functions. The inability to readily crystallize membrane proteins for X-ray diffraction, or in solution NMR to study proteins with large molecular weight and to retain all intramolecular structures of the membrane proteins during their solubilisation process by detergents are the key reasons for a scarcity of atomic-resolution membrane protein structures. This has hindered our understanding of the structure-function relationship of membrane proteins. New strategies for studying membrane proteins will provide more insights. In this thesis, we have coupled atomic force microscopy and two fluorescence microscopy techniques---total internal reflectance fluorescence microscopy and confocal laser scanning microscopy, to visualize protein-membrane interactions and dynamics in model membrane systems. To validate our correlated approach, we investigated the partitioning of various lipid fluorescent probes in phase-separated supported planar bilayers. We applied the same methodology in two case studies of peptide-membrane interactions in supported planar bilayers: (1) indolicidin, a cationic 13 amino-acid peptide isolated from bovine neutrophils, as a model of antimicrobial peptide-membrane interactions, and (2) NAP-22 peptide, a cationic myristoylated peptide crucial for neuronal growth and plasticity, as a model of protein-induced lipid recruitment. Using this combined AFM-fluorescence approach with supported planar bilayers, we showed that: (1) the attachment of a fluorescent dye molecule can alter the physical properties of the host lipid and inhibit the lipid-dye conjugate from associating with raft domains, (2) indolicidin preferentially associates with the more disordered fluid domain and induces gel domain lowering in a concentration- and lipid-dependent manner, and (3) NAP-22 peptide induces coalescence of raft domains at low peptide concentration and phase-immersion at high peptide concentration resulting the co-localization of cholesterol and phosphatidylinositol biphosphates. This work demonstrates the versatility of a combined AFM-fluorescence approach as well as its limitations of the current configurations.
Author: Luca Domenico D’Andrea
Publisher: Frontiers Media SA
ISBN: 2889718204
Category : Science
Languages : en
Pages : 135
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Book Description
