Download or read book The Structure and Function of a Conserved Domain of Apolipoprotein E written by Demetrios T. Braddock and published by . This book was released on 1994 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structure and Function of Apolipoproteins written by Maryvonne Rosseneu and published by CRC Press. This book was released on 1992-08-14 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structure and Function of Apolipoproteins presents a comprehensive review of the primary and secondary structure of apolipoproteins. The book discusses the structure of the apolipoprotein gene family and genetic variation occurring at the protein level. Functional properties of apolipoproteins, including lipid binding, enzyme co-factor activity, antigenic properties, and receptor-ligand interactions are extensively described and analyzed in relation to their structural features. Physiological properties of apolipoproteins and their role in biology and medicine are also examined. Anyone who is interested in apolipoproteins or is conducting research on atherosclerosis should consider this volume an essential reference.
Download or read book Nuclear Magnetic Resonance Spectroscopy Studies of the Lipid bound Receptor Active Conformation of the Apolipoprotein E Amino terminus written by Paul Stephen Hauser and published by . This book was released on 2010 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Apolipoprotein (apo) E is an exchangeable apolipoprotein that is critical for the trafficking of lipid and cholesterol nutrients in the brain and peripheral circulation. ApoE is a 299 amino acid (37 kDa) protein comprised of two independently folded functional domains, the carboxy-terminal lipid-binding domain and the receptor-binding amino-terminal (NT) domain that only displays receptor competent activity upon association with lipid. In the absence of lipid, the isolated NT domain (residues 1-183) of apoE adopts an amphipathic four alpha-helix bundle architecture that is characteristic of several other related apolipoproteins. Various models have been advanced that describe the predicted conformational change of the protein upon lipid binding. Experiments have shown that the alpha-helical secondary structure is preserved if not enhanced upon lipid binding and yet it is known that the protein undergoes a dramatic conformational change in the transition to the lipid-bound state. Low-resolution experiments have provided insight into the mechanism and possible path of this transition, but a high-resolution determination of the lipid-bound conformation of apoE has not been accomplished. Using a combination of unique protein engineering methods and nuclear magnetic resonance (NMR) spectroscopy, this thesis advances the understanding of the lipid-induced conformational change of the apoE N-terminus. Recombinant apoE NT (residues 1-183) is a representative model for apolipoprotein helix bundle conformational flexibility in the presence of lipid and on the surface of lipoprotein particles. The 22 kDa domain is predominantly alpha-helical, monomeric, and comparably stable relative to the native protein. This domain readily forms discoidal particles in the presence of phospholipids, which imparts low-density lipoprotein (LDL) receptor activity to the protein. A protein engineering approach was used to further define the structural determinants of apoE NT that are necessary for lipid binding. A short helix connecting helix 1 and 2 in the four-helix bundle was replaced by a sequence predicted to adopt a beta-turn. The resulting stable recombinant protein was not compromised in its ability to function as a ligand for the LDL receptor, yet the protein displayed greatly enhanced binding affinity for lipid as assessed by phospholipid solubilization studies, a lipophilic fluorescent dye binding assay, and protection against phospholipase induced aggregation of human LDL fractions. In order to define the detailed lipid-induced conformational change in apoE, a protein engineering approach termed segmental isotope labeling was deemed necessary to simplify the system for analysis by NMR. Using expressed protein ligation (EPL) methodology, a hybrid apolipoprotein was constructed from two independently generated fragments, apoE residues 1-111 and a 91 amino acid apolipophorin protein fragment. This protein ligation experiment tested the novel use of a pelB leader sequence for the generation of an N-terminal cysteine-containing protein fragment required for the joining of protein fragments by EPL. Expressed protein ligation techniques were alternatively adapted to create an intact, semisynthetic apoE NT domain using apoE(1-111) and apoE(112-183) protein fragments. This semisynthetic protein displayed nearly identical structural and function properties as wild-type apoE NT by circular dichroism spectroscopy, guanidine denaturation studies, and functional lipid and LDL receptor binding studies. Stable isotope-labeled (15N) apoE(112-183) was produced and ligated to unlabeled apoE 1-111 protein to create a segmental isotope-labeled protein. NMR experiments of the segmental protein further confirmed a structural and functional correspondence between wild-type, fully 15N-labeled and segmental isotope-labeled apoE NT while affirming that the segmental system dramatically simplified the NMR system for examining the protein region containing the LDL receptor recognition sequence.
Download or read book High Density Lipoproteins written by Arnold von Eckardstein and published by Springer. This book was released on 2015-01-13 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this Handbook of Experimental Pharmacology on “High Density Lipoproteins – from biological understanding to clinical exploitation” contributing authors (members of COST Action BM0904/HDLnet) summarize in more than 20 chapters our current knowledge on the structure, function, metabolism and regulation of HDL in health and several diseases as well as the status of past and ongoing attempts of therapeutic exploitation. The book is of interest to researchers in academia and industry focusing on lipoprotein metabolism, cardiovascular diseases and immunology as well as clinical pharmacologists, cardiologists, diabetologists, nephrologists and other clinicians interested in metabolic or inflammatory diseases.
Download or read book The Biology of Human Longevity written by Caleb E. Finch and published by Elsevier. This book was released on 2010-07-28 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by Caleb Finch, one of the leading scientists of our time, The Biology of Human Longevity: Inflammation, Nutrition, and Aging in the Evolution of Lifespans synthesizes several decades of top research on the topic of human aging and longevity particularly on the recent theories of inflammation and its effects on human health. The book expands a number of existing major theories, including the Barker theory of fetal origins of adult disease to consider the role of inflammation and Harmon's free radical theory of aging to include inflammatory damage. Future increases in lifespan are challenged by the obesity epidemic and spreading global infections which may reverse the gains made in lowering inflammatory exposure. This timely and topical book will be of interest to anyone studying aging from any scientific angle. Author Caleb Finch is a highly influential and respected scientist, ranked in the top half of the 1% most cited scientists Provides a novel synthesis of existing ideas about the biology of longevity and aging Incorporates important research findings from several disciplines, including Gerontology, Genomics, Neuroscience, Immunology, Nutrition
Download or read book Apolipoprotein E and Alzheimer s Disease written by A.D. Roses and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is now considerable genetic evidence that the type 4 allele of the apolipoprotein E gene is a major susceptibility factor associated with late-onset Alzheimer's disease, the common form of the disease defined as starting after sixty years of age. The role of apolipoprotein E in normal brain metabolism and in the pathogenesis of Alzheimer's disease are new and exciting avenues of research. This book, written by the most outstanding scientists in this new filed, is the first presentation of results concerning the implications of apolipoprotein E on the genetics, cell biology, neuropathology, biochemistry, and therapeutic management of Alzheimer's disease.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Amphipathic Helix written by Richard M. Epand and published by CRC Press. This book was released on 1993-07-09 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Amphipathic Helix is a comprehensive volume discussing amphipathic helices in systems as diverse as serum lipoproteins, lung surfactant, cytotoxic peptides, ion channels, mitochondrial targeting, peptide hormones, G proteins, T-cell recognition, DNA binding proteins, and antifreeze proteins. The book also includes general introductory material that defines amphipathic helices, discusses methods to identify amphipathic helical segments from the amino acid sequence of a protein, illustrates how amphipathic helices can be used in the de novo design of peptide and protein structures, and describes how these helices stabilize protein structures. There is also a section on techniques to determine helix orientation in a membrane environment using polarized attenuated total reflection infrared spectroscopy or solid state NMR spectroscopy. Recent developments on all these topics have been discussed by leading experts in this reference for researchers and students in biochemistry, biophysics, and pharmacology.
Download or read book Cholesterol Binding and Cholesterol Transport Proteins written by J. Robin Harris and published by Springer Science & Business Media. This book was released on 2010-03-10 with total page 641 pages. Available in PDF, EPUB and Kindle. Book excerpt: Knowledge of cholesterol and its interaction with protein molecules is of fundamental importance in both animal and human biology. This book contains 22 chapters, dealing in depth with structural and functional aspects of the currently known and extremely diverse unrelated families of cholesterol-binding and cholesterol transport proteins. By drawing together this range of topics the Editor has attempted to correlate this broad field of study for the first time. Technical aspects are given considerable emphasis, particularly in relation cholesterol reporter molecules and to the isolation and study of membrane cholesterol- and sphingomyelin-rich "raft" domains. Cell biological, biochemical and clinical topics are included in this book, which serve to emphasize the acknowledged and important benefits to be gained from the study of cholesterol and cholesterol-binding proteins within the biomedical sciences and the involvement of cholesterol in several clinical disorders. It is hoped that by presenting this topic in this integrated manner that an appreciation of the fact that there is much more that needs to be taken into account, studied and understood than the widely discussed "bad and good cholesterol" associated, respectively, with the low- and high-density lipoproteins, LDL and HDL.
Download or read book Plasma Lipoproteins written by Antonio M. Gotto and published by Elsevier Publishing Company. This book was released on 1987 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this rapidly evolving field of research, an enormous amount of new knowledge of lipoprotein structure, function and metabolism has emerged. The 1985 Nobel Prize-winning pioneering work of Brown and Goldstein on the LDL receptor has had a profound impact on developments in the field. This work is one of the many subjects reviewed in detail in this book. The volume begins with chapters on structure, then proceeds to analysis of lipid and lipoprotein dynamics, metabolism, function, genetics, and molecular biology. Lipoprotein genetics in molecular biology, the role of lipoprotein receptors, and Lp(a) - a topic underrepresented in volumes on lipoproteins, are another three such topics in an impressive volume. This work will mainly be of interest to researchers interested in lipid and lipoprotein structure and metabolism, but will also be of great value to clinical medicine and biology in general.
Download or read book Sequence Evolution Function written by Eugene V. Koonin and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sequence - Evolution - Function is an introduction to the computational approaches that play a critical role in the emerging new branch of biology known as functional genomics. The book provides the reader with an understanding of the principles and approaches of functional genomics and of the potential and limitations of computational and experimental approaches to genome analysis. Sequence - Evolution - Function should help bridge the "digital divide" between biologists and computer scientists, allowing biologists to better grasp the peculiarities of the emerging field of Genome Biology and to learn how to benefit from the enormous amount of sequence data available in the public databases. The book is non-technical with respect to the computer methods for genome analysis and discusses these methods from the user's viewpoint, without addressing mathematical and algorithmic details. Prior practical familiarity with the basic methods for sequence analysis is a major advantage, but a reader without such experience will be able to use the book as an introduction to these methods. This book is perfect for introductory level courses in computational methods for comparative and functional genomics.
Download or read book Lipids in Protein Misfolding written by Olga Gursky and published by Springer. This book was released on 2015-07-06 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Protein conversion from a water-soluble native conformation to the insoluble aggregates and fibrils, which can deposit in amyloid plaques, underlies more than 20 human diseases, representing a major public health problem and a scientific challenge. Such a conversion is called protein misfolding. Protein misfolding can also involve errors in the topology of the folded proteins and their assembly in lipid membranes. Lipids are found in nearly all amyloid deposits in vivo, and can critically influence protein misfolding in vitro and in vivo in many different ways. This book focuses on recent advances in our understanding of the role of lipids in modulating the misfolding of various proteins. The main emphasis is on the basic biophysical studies that address molecular basis of protein misfolding and amyloid formation, and the role of lipids in this complex process.
Download or read book Structure Analysis by Small Angle X Ray and Neutron Scattering written by L.A. Feigin and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small-angle scattering of X rays and neutrons is a widely used diffraction method for studying the structure of matter. This method of elastic scattering is used in various branches of science and technology, includ ing condensed matter physics, molecular biology and biophysics, polymer science, and metallurgy. Many small-angle scattering studies are of value for pure science and practical applications. It is well known that the most general and informative method for investigating the spatial structure of matter is based on wave-diffraction phenomena. In diffraction experiments a primary beam of radiation influences a studied object, and the scattering pattern is analyzed. In principle, this analysis allows one to obtain information on the structure of a substance with a spatial resolution determined by the wavelength of the radiation. Diffraction methods are used for studying matter on all scales, from elementary particles to macro-objects. The use of X rays, neutrons, and electron beams, with wavelengths of about 1 A, permits the study of the condensed state of matter, solids and liquids, down to atomic resolution. Determination of the atomic structure of crystals, i.e., the arrangement of atoms in a unit cell, is an important example of this line of investigation.
Download or read book Anatomy of Gene Regulation written by Panagiotis A. Tsonis and published by Cambridge University Press. This book was released on 2003-01-13 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Table of contents
Download or read book Translational Research in Traumatic Brain Injury written by Daniel Laskowitz and published by CRC Press. This book was released on 2016-04-21 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traumatic brain injury (TBI) remains a significant source of death and permanent disability, contributing to nearly one-third of all injury related deaths in the United States and exacting a profound personal and economic toll. Despite the increased resources that have recently been brought to bear to improve our understanding of TBI, the developme
Download or read book Neurodegenerative Diseases and Metal Ions written by Astrid Sigel and published by Wiley. This book was released on 2006-05-12 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: About the Series... Metal Ions in Life Sciences links coordination chemistry and biochemistry in their widest sense and thus increases our understanding of the relationship between the chemistry of metals and life processes. The series reflects the interdisciplinary nature of Biological Inorganic Chemistry and coordinates the efforts of scientists in fields like biochemistry, inorganic chemistry, coordination chemistry, molecular and structural biology, enzymology, environmental chemistry, physiology, toxicology, biophysics, pharmacy, and medicine. Consequently, the volumes are an essential source for researchers active in these and related fields as well as teachers preparing courses, e.g., in Bioinorganic Chemistry. About this Book... Volume 1, devoted solely to the vital research area concerning the role of metal ions in neurodegenerative diseases, offers in 15 stimulating chapters an authoritative and timely view of this fascinating subject. Written by 41 internationally recognized experts, Neurodegenerative Diseases and Metal Ions highlights, supported by 130 illustrations, the recent progress made in understanding the role metal ions play in diseases like transmissible spongiform encephalopathies (Creutzfeldt-Jakob and related diseases), Alzheimer's, Parkinson's, Huntington's, Wilson's and Menkes' diseases, as well as in familial amyotrophic lateral sclerosis and others. The interplay between metal ions, catecholamines and the formation of reactive oxygen species resulting in oxidative stress is considered, as is the metalloneurochemistry of zinc and the neurotoxicity of aluminum, cadmium, lead, and mercury. The need for novel drugs which manipulate metal-centered neuropathology is emphasized.
Download or read book The Physiological Functions of the Amyloid Precursor Protein Gene Family written by Ulrike C. Müller and published by Frontiers Media SA. This book was released on 2017-12-28 with total page 295 pages. Available in PDF, EPUB and Kindle. Book excerpt: The amyloid precursor protein APP plays a key role in the pathogenesis of Alzheimer’s disease (AD), as proteolytical cleavage of APP gives rise to the Aβ peptide which is deposited in the brains of Alzheimer patients. Despite this, our knowledge of the normal cell biological and physiological functions of APP and the closely related APLPs is limited. This may have hampered our understanding of AD, since evidence has accumulated that not only the production of the Aβ peptide but also the loss of APP-mediated functions may contribute to AD pathogenesis. Thus, it appears timely and highly relevant to elucidate the functions of the APP gene family from the molecular level to their role in the intact organism, i.e. in the context of nervous system development, synapse formation and adult synapse function, as well as neural homeostasis and aging. Why is our understanding of the APP functions so limited? APP and the APLPs are multifunctional proteins that undergo complex proteolytical processing. They give rise to an almost bewildering array of different fragments that may each subserve specific functions. While Aβ is aggregation prone and neurotoxic, the large secreted ectodomain APPsα - produced in the non-amyloidogenic α-secretase pathway - has been shown to be neurotrophic, neuroprotective and relevant for synaptic plasticity, learning and memory. Recently, novel APP cleavage pathways and enzymes have been discovered that have gained much attention not only with respect to AD but also regarding their role in normal brain physiology. In addition to the various cleavage products, there is also solid evidence that APP family proteins mediate important functions as transmembrane cell surface molecules, most notably in synaptic adhesion and cell surface signaling. Elucidating in more detail the molecular mechanisms underlying these divers functions thus calls for an interdisciplinary approach ranging from the structural level to the analysis in model organisms. Thus, in this research topic of Frontiers we compile reviews and original studies, covering our current knowledge of the physiological functions of this intriguing and medically important protein family.
