Download or read book Studies of the Heme Proteins Soluble Guanylyl Cyclase and Cystathionine Beta synthase written by Melisa M. Cherney and published by . This book was released on 2007 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural Studies on Medically Important Heme Proteins written by Olena Pylypenko and published by . This book was released on 2003 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Enzymological Studies of Cystathionine Beta synthase written by and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work explored the function of heme in cystathionine ss-synthase (CBS) by studying the interplay of heme reactivities and enzymatic activities in CBS orthologs and mutants. CBS is a pyridoxal 5'-phosphate (PLP)-dependent enzyme involved in sulfur amino acid metabolism. CBS catalyzes the condensation of serine and homocysteine to form cystathionine via the PLP cofactor. Missense mutations in CBS are associated with the hereditary disease CBS-deficient homocystinuria (CBSDH). Human CBS is regulated by S-adenosylmethionine (AdoMet) and unexpectedly contains heme, whose function remains elusive. The His/Cys coordination environment of the CBS heme confers unusual reactivities. Disruption of the heme-Cys(thiolate) coordinate bond (e.g. by binding CO or NO gas to the heme) eliminates enzyme activity. A comparative study of human and fruit fly CBSs revealed that the fruit fly CBS is highly active but is not regulated by AdoMet due to its inability to bind AdoMet. The fruit fly CBS contains a heme which behaves essentially the same as the human CBS heme. These results suggest that the heme's function is not related to AdoMet-regulation. The CBS heme binds CO and NO extremely slowly and is therefore unlikely to be a gas sensor. In the CBSDH-associated variants P49L, P78R, R125Q and R266K, the heme environment is disturbed, as indicated by subtle changes in the spectroscopic properties of the variants. The P49L, P78R and R266K variants are catalytically competent and AdoMet-responsive, whereas the R125Q variant is impaired and not AdoMet-responsive. Steady-state kinetics of the wild type and variant enzymes are consistent with a model that AdoMet activates CBS by inducing a conformational change of the enzyme that facilitates the substrates' access to the active site. Correlated changes in heme properties and catalytic chemistry in the variants are attributed to the disrupted hydrogen bonding and salt bridge interactions caused by the mutations. Analysis of the chemical mechanisms and structures of CBS and its closest homolog, cysteine synthase, suggested that two active-site tyrosine residues serve as proton donors that are critical for CBS activity, and may be used to distinguish CBS and cysteine synthase from their sequences.
Download or read book Towards Understanding the Role of the Heme Cofactor in Cystathionine synthase written by Samuel Pazicni and published by . This book was released on 2006 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1995 with total page 1498 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Endothelium written by Michel Félétou and published by Morgan & Claypool Publishers. This book was released on 2011 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: The endothelium, a monolayer of endothelial cells, constitutes the inner cellular lining of the blood vessels (arteries, veins and capillaries) and the lymphatic system, and therefore is in direct contact with the blood/lymph and the circulating cells. The endothelium is a major player in the control of blood fluidity, platelet aggregation and vascular tone, a major actor in the regulation of immunology, inflammation and angiogenesis, and an important metabolizing and an endocrine organ. Endothelial cells controls vascular tone, and thereby blood flow, by synthesizing and releasing relaxing and contracting factors such as nitric oxide, metabolites of arachidonic acid via the cyclooxygenases, lipoxygenases and cytochrome P450 pathways, various peptides (endothelin, urotensin, CNP, adrenomedullin, etc.), adenosine, purines, reactive oxygen species and so on. Additionally, endothelial ectoenzymes are required steps in the generation of vasoactive hormones such as angiotensin II. An endothelial dysfunction linked to an imbalance in the synthesis and/or the release of these various endothelial factors may explain the initiation of cardiovascular pathologies (from hypertension to atherosclerosis) or their development and perpetuation. Table of Contents: Introduction / Multiple Functions of the Endothelial Cells / Calcium Signaling in Vascular Cells and Cell-to-Cell Communications / Endothelium-Dependent Regulation of Vascular Tone / Conclusion / References
Download or read book Heme as an Allosteric Regulator in CooA and Cystathionine synthase written by Ryan B. Parks and published by . This book was released on 2002 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of Animal Science Two Volume Set written by Wilson G. Pond and published by CRC Press. This book was released on 2018-10-08 with total page 2174 pages. Available in PDF, EPUB and Kindle. Book excerpt: PRINT/ONLINE PRICING OPTIONS AVAILABLE UPON REQUEST AT [email protected] Containing case studies that complement material presented in the text, the vast range of this definitive Encyclopediaencompasses animal physiology, animal growth and development, animal behavior, animal reproduction and breeding, alternative approaches to animal maintenance, meat science and muscle biology, farmed animal welfare and bioethics, and food safety. With contributions from top researchers in their discipline, the book addresses new research and advancements in this burgeoning field and provides quick and reader-friendly descriptions of technologies critical to professionals in animal and food science, food production and processing, livestock management, and nutrition.
Download or read book Perspectives on Antiarrhythmic Drug Therapy Disappointing Past Current Efforts and Faint Hopes written by Peter P. Nanasi and published by Frontiers Media SA. This book was released on 2020-09-08 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Download or read book Stroke E Book written by J. P. Mohr and published by Elsevier Health Sciences. This book was released on 2011-05-13 with total page 1513 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1986 under the editorial direction of Dr. Henry J.M. Barnett, Stroke: Pathophysiology, Diagnosis, and Management continues to provide the dependable, current answers you need to effectively combat the increasing incidence of this disease. Dr. J.P. Mohr, together with new associate editors Philip A. Wolf, James C. Grotta, Michael A. Moskowitz, Marc Mayberg, and Rüdiger von Kummer as well as a multitude of expert contributors from around the world, offer you updated and expanded coverage of mechanisms of action of commonly used drugs, neuronal angiogenesis and stem cells, basic mechanisms of spasm and hemorrhage, prevention of stroke, genetics/predisposing risk factors, and much more, equipping you to understand the latest scientific discoveries and make effective use of the newest approaches to diagnosis and treatment. Gain fresh perspectives and up-to-date insights from the world’s leading authorities on the pathophysiology, diagnosis, and management of stroke. Access the comprehensive, expert clinical guidance you need to recognize the clinical manifestations of stroke, use the latest laboratory and imaging studies to arrive at a diagnosis, and generate an effective medical and surgical treatment plan. Make efficient and accurate diagnoses with the aid of abundant full-color CT images and pathology slides. Stay up to date on hot topics such as mechanisms of action of commonly used drugs, neuronal angiogenesis and stem cells, basic mechanisms of spasm and hemorrhage, prevention of stroke, genetics/predisposing risk factors, and much more.
Download or read book Chemistry Biochemistry and Pharmacology of Hydrogen Sulfide written by Philip K. Moore and published by Springer. This book was released on 2015-07-10 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book puts hydrogen sulfide in context with other gaseous mediators such as nitric oxide and carbon monoxide, reviews the available mechanisms for its biosynthesis and describes its physiological and pathophysiological roles in a wide variety of disease states. Hydrogen sulfide has recently been discovered to be a naturally occurring gaseous mediator in the body. Over a relatively short period of time this evanescent gas has been revealed to play key roles in a range of physiological processes including control of blood vessel caliber and hence blood pressure and in the regulation of nerve function both in the brain and the periphery. Disorders concerning the biosynthesis or activity of hydrogen sulfide may also predispose the body to disease states such as inflammation, cardiovascular and neurological disorders. Interest in this novel gas has been high in recent years and many research groups worldwide have described its individual biological effects. Moreover, medicinal chemists are beginning to synthesize novel organic molecules that release this gas at defined rates with a view to exploiting these new compounds for therapeutic benefit.
Download or read book The Chemistry and Biology of Nitroxyl HNO written by Fabio Doctorovich and published by Elsevier. This book was released on 2016-09-01 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Chemistry and Biology of Nitroxyl (HNO) provides first-of-its-kind coverage of the intriguing biologically active molecule called nitroxyl, or azanone per IUPAC nomenclature, which has been traditionally elusive due to its intrinsically high reactivity. This useful resource provides the scientific basis to understand the chemistry, biology, and technical aspects needed to deal with HNO. Building on two decades of nitric oxide and nitroxyl research, the editors and authors have created an indispensable guide for investigators across a wide variety of areas of chemistry (inorganic, organic, organometallic, biochemistry, physical, and analytical); biology (molecular, cellular, physiological, and enzymology); pharmacy; and medicine. This book begins by exploring the unique molecule’s structure and reactivity, including important reactions with small molecules, thiols, porphyrins, and key proteins, before discussing chemical and biological sources of nitroxyl. Advanced chapters discuss methods for both trapping and detecting nitroxyl by spectroscopy, electrochemistry, and fluorescent inorganic cellular probing. Expanding on the compound’s foundational chemistry, this book then explores its molecular physiology to offer insight into its biological implications, pharmacological effects, and practical issues. Presents the first book on HNO (nitroxyl or azanone), an increasingly important molecule in biochemistry and pharmaceutical research Provides a valuable coverage of HNO’s chemical structure and significant reactions, including practical guidance on working with this highly reactive molecule Contains high quality content from recognized experts in both industry and academia
Download or read book Lehninger Principles of Biochemistry written by Albert L. Lehninger and published by Macmillan. This book was released on 2005 with total page 1256 pages. Available in PDF, EPUB and Kindle. Book excerpt: CD-ROM includes animations, living graphs, biochemistry in 3D structure tutorials.
Download or read book Intracellular Signaling Mediators in the Circulatory and Ventilatory Systems written by Marc Thiriet and published by Springer Science & Business Media. This book was released on 2012-09-26 with total page 1073 pages. Available in PDF, EPUB and Kindle. Book excerpt: The volumes in this authoritative series present a multidisciplinary approach to modeling and simulation of flows in the cardiovascular and ventilatory systems, especially multiscale modeling and coupled simulations. The cardiovascular and respiratory systems are tightly coupled, as their primary function is to supply oxygen to and remove carbon dioxide from the body's cells. Because physiological conduits have deformable and reactive walls, macroscopic flow behavior and prediction must be coupled to phenomenological models of nano- and microscopic events in a corrector scheme of regulated mechanisms when the vessel lumen caliber varies markedly. Therefore, investigation of flows of blood and air in physiological conduits requires an understanding of the biology, chemistry, and physics of these systems together with the mathematical tools to describe their functioning. Volume 4 is devoted to major sets of intracellular mediators that transmit signals upon stimulation of cell-surface receptors. Activation of signaling effectors triggers the release of substances stored in cellular organelles and/or gene transcription and protein synthesis. Complex stages of cell signaling can be studied using proper mathematical models, once the role of each component is carefully handled. Volume 4 also reviews various categories of cytosolic and/or nuclear mediators and illustrates some major signal transduction pathways, such as NFkappaB axis, oxygen sensing, and mechanotransduction.
Download or read book Iron Porphyrins written by A. B. P. Lever and published by Wiley-VCH. This book was released on 1989-03-31 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Porphyrins play a vital role in many biological functions including oxygen transport, electron transfer and catalyzing the incorporation of oxygen into other molecules. This current survey discusses the use of modern physical techniques to probe porphyrin structure and function. The authors review the data available through a particular technique and show what can be learned therefrom about the (electronic) structure and function of biologically important porphyrins. The techniques include magnetic circular dichroism, X-ray absorption fine structure (EXAFS) and Mössbauer spectroscopies. All contributors are well known in their respective fields, enjoying world-wide reputation.
Download or read book Molecules to Medicine with mTOR written by Kenneth Maiese and published by Academic Press. This book was released on 2016-02-21 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Molecules to Medicine with mTOR: Translating Critical Pathways into Novel Therapeutic Strategies is a one-stop reference that thoroughly covers the mechanistic target of rapamycin (mTOR). mTOR, also known as the mammalian target of rapamycin, is a 289-kDa serine/threonine protein kinase that is ubiquitous throughout the body and has a critical role in gene transcription and protein formation, stem cell development, cell survival and senescence, aging, immunity, tissue regeneration and repair, metabolism, tumorigenesis, oxidative stress, and pathways of programmed cell death that include apoptosis and autophagy. Incorporating a translational medicine approach, this important reference highlights the basic cellular biology of mTOR pathways, presents the role of mTOR during normal physiologic function and disease, and illustrates how the mechanisms of mTOR can be targeted for current and future therapeutic treatment strategies. Coverage of mTOR signaling includes the entire life cycle of cells that impacts multiple systems of the body including those of nervous, cardiovascular, immune, musculoskeletal, endocrine, reproductive, renal, and respiratory origin. Covers the role of mTOR by internationally recognized expert contributors in the field. Provides a clear picture of the complexity of mTOR signaling as well as of the different approaches that could target this pathway at various levels. Includes analysis of the role of mTOR and in both health and disease. Serves as an important resource for a broad audience of healthcare providers, scientists, drug developers, and students in both clinical and research settings.
Download or read book Advances in Hydrogen Sulfide Biology written by Yi-Chun Zhu and published by Springer Nature. This book was released on 2021-07-24 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrogen sulfide (H2S) has emerged as an important gas signalling molecule in a series of organs/tissues, on the diseases of which it plays protective roles, such as proangiogenic effects in ischemic tissues, antiapoptotic effects in the cardiomyocytes, regularization of fatal arrhythmia in myocardial infarction, amelioration of inflammation in autoimmune diseases, modification of neuronal transmission, increase in sodium excretion from the kidney, and amelioration of insulin resistance, etc. This book focuses on the effect of hydrogen sulfide in cardiovascular system, immune system, nervous system, kidney, as well as on the metabolism of glucose and lipids and regulation of ion channels and so on. This book also provides the advances in the understanding of endogenous H2S metabolism and H2S protein targets, as well as H2S donors. It will benefit researchers in both academics and industry working on the underlying mechanism of H2S field and the future of translational medicine of H2S.
