Download or read book Oxygen Sensing in Escherichia Coli and the Role of Cyclic Regulation written by Dean Alexander Tolla and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This work examines the role of a cyclic genetic regulatory circuit acting as an environmental sensor. As a representative of this class of systems, we focus on the FNR regulatory circuit of Escherichia coli for which a large body of experimental evidence describing its molecular components and their individual interactions exists. However, until recently this information had never been integrated into a coherent model of the intact system. The FNR protein is an oxygen sensor that acts as a global transcription factor and when active modifies gene expression to adapt the cell to anaerobic growth. Our study provides strong support for an integrated model of FNR regulation that demonstrates self-consistency of a large body of experimental work, makes predictions of additional mutant behavior that are validated by experimental data, predicts the dynamics of the aerobic-to-anaerobic transition, provides estimates of active FNR in vivo, and makes it possible to predict in situ the dimerization rate of the transcription factor. We provide an original definition of what is meant by phenotype at the molecular level that is based on the concept of a "system design space". This definition allows us to rigorously characterize the regulatory phenotypes exhibited by the master transcription factor FNR. We identify 15 qualitatively-distinct phenotypes, analyze the alternatives, and compare their relative fitness. Our analysis reveals desirable and undesirable phenotypes as well as an optimal band of operation corresponding to the transition between aerobic and anaerobic environments. We analyze specific mutations and predict their associated phenotypic changes. By identifying the phenotypic repertoire our design space analysis provides a means to evaluate the evolutionary pressures that have shaped this system. Our application of the design space approach to the FNR network provides a detailed framework for characterizing other environmental sensing regulatory networks, and this approach is sufficiently general that it can be used to analyze the distinct behaviors presented by essentially any biochemical network. By examining a family of FNR models each with different cycling speeds but mathematically constrained to be otherwise equivalent, we are able to elucidate the relationship between the cycling rate and response time of the FNR circuit. We identify an optimum cycling rate for the FNR system. Our analysis of a currently uncharacterized double mutant argues in favor of these predicted results and provides a means to test our predictions in the laboratory. We examine the phenotype of increasing the number of fnr gene copies and show that the copy-number mutant exaggerates the predicted dynamics of active FNR induction. We provide an experimental method capable of capturing the dynamics of active FNR induction and repression, and predict its results for the wild-type, double mutant, and copy-number mutant.
Download or read book Oxygen Sensing written by and published by Elsevier. This book was released on 2004-05-10 with total page 867 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability of cells to sense and respond to changes in oxygenation underlies a multitude of developmental, physiological, and pathological processes. This volume provides a comprehensive compendium of experimental approaches to the study of oxygen sensing in 48 chapters that are written by leaders in their fields.
Download or read book Regulation of Gene Expression in Escherichia coli written by E. C. C. Lin and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1010 pages. Available in PDF, EPUB and Kindle. Book excerpt: This up-to-date guide focuses on the understanding of key regulatory mechanisms governing gene expression in Escherichia coli. Studies of E. coli not only provide the first models of gene regulation, but research continues to yield different control mechanisms.
Download or read book Bacterial Chromatin written by Remus T. Dame and published by Springer Nature. This book was released on with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microbial Globins Status and Opportunities written by and published by Academic Press. This book was released on 2013-09-14 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Microbial Physiology is one of the most successful and prestigious series from Academic Press, an imprint of Elsevier. It publishes topical and important reviews, interpreting physiology to include all material that contributes to our understanding of how microorganisms and their component parts work. First published in 1967, it is now in its 63rd volume. The Editors have always striven to interpret microbial physiology in the broadest context and have never restricted the contents to "traditional views of whole cell physiology. Now edited by Professor Robert Poole, University of Sheffield, Advances in Microbial Physiology continues to be an influential and very well reviewed series. - Informs and updates on all the latest developments in the field - Contributions from leading authorities and industry experts
Download or read book Hemoglobin and Myoglobin in Their Reactions with Ligands written by Eraldo Antonini and published by North-Holland. This book was released on 1971 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oxygen Sensing written by Sukhamay Lahiri and published by CRC Press. This book was released on 2003-04-15 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviewing research on the molecular basis of oxygen homeostasis, this text describes the changes in intracellular signalling and gene expression that lead to physiological responses to hypoxia in unicellular, invertebrate, and mammalian species. It examines O2 sensing systems in bacteria and archaea and demonstrates interrelationships among cell pr
Download or read book Chemistry and Biochemistry of Flavoenzymes written by Franz Muller and published by CRC Press. This book was released on 2019-07-22 with total page 1087 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemistry and Biochemistry of Flavoenzymes summarizes the present knowledge of the chemical and physical properties of free flavin, modified flavins occurring in nature, and deazaflavin. This information forms the fundamental basis for understanding the catalytic properties of flavoenzymes. Flavoproteins involved in transport, electron transfer, oxidation, dehydrogenation and hydroxylation reactions are discussed with respect to their biochemical and biophysical properties. The book presents the catalytic mechanisms of the flavoproteins in detail and, where available, three-dimensional structures and molecular biology data are included. The medical aspects of free and protein-bound flavin are also briefly discussed. Chemistry and Biochemistry of Flavoenzymes is an essential reference source for chemists, biochemists, toxicologists, biologists, pharmacologists, and researchers in the pharmaceutical industry.
Download or read book Bacterial Sensing and Signaling written by Mattias Collin and published by Karger Medical and Scientific Publishers. This book was released on 2009-01-01 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last fifteen years it has become increasingly obvious that bacteria are not as simple and solitary as once believed. Rather, an accumulating body of work shows that bacteria are highly complicated and social organisms, constantly sensing their surroundings and altering both their environments and behaviors to ensure survival. Direct communication between bacteria turns out to be quite common, as are coordinated intra- and interspecies responses that include the formation of highly sophisticated microbial communities. In fact, threats to bacterial survival from assaults ranging from nutrient deprivation and oxygen depletion tothe defenses of eukaryotic hostsare all managed through the integration of a dizzying array of complex sensory and communication systems with the appropriate bacterial behaviors. This volume provides an update of the current knowledgeinthe expanding field ofbacterial sensing and signaling, highlighting its most important and interesting aspects. In twelve state-of-the-art articles, respected international experts address topics such as quorum sensing and secondary messengers, chemotaxis and magnetoaerotaxis, two-component phosphotransferase systems, bacterial virulence mechanisms, thermoregulation, and more. The final chapter represents a unique description of the tools available to manipulate many of the sensing and signaling systems described in this volume. Bacterial Sensing and Signaling is recommended reading for students, scientists and clinicians with interests in microbiology, immunology, ecology, biotechnology and a range of other disciplines.
Download or read book Regulation of Bacterial Virulence written by Michael L. Vasil and published by American Society for Microbiology Press. This book was released on 2012-12-05 with total page 1189 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive compendium of scholarly contributions relating to bacterial virulence gene regulation. • Provides insights into global control and the switch between distinct infectious states (e.g., acute vs. chronic). • Considers key issues about the mechanisms of gene regulation relating to: surface factors, exported toxins and export mechanisms. • Reflects on how the regulation of intracellular lifestyles and the response to stress can ultimately have an impact on the outcome of an infection. • Highlights and examines some emerging regulatory mechanisms of special significance. • Serves as an ideal compendium of valuable topics for students, researchers and faculty with interests in how the mechanisms of gene regulation ultimately affect the outcome of an array of bacterial infectious diseases.
Download or read book Cytochromes c written by Geoffrey R. Moore and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cytochromes c are haemoproteins which carry out electron transfer in a wide variety of biological systems, necessitating different kinds of cytochrome c to fulfill different biological roles. The evolutionary relationship between cytochromes c and their host organisms are described, as well as their structural, spectroscopic and redox properties, including both electron-transfer rates and redox potentials. The treatment is aimed at the non-specialist so that both the techniques described and their application to cytochromes c can be understood. All classes of cytochrome c are dealt with to provide a comprehensive account of the field. No other text provides such a broad survey. Similar to the earlier volume "Cytochromes c: Biological Aspects" which deals with the classification, biosynthesis and biological role of cytochromes c, the present book is aimed at research workers and advanced students.
Download or read book Principles in Microbiome Engineering written by Matthew W. Chang and published by John Wiley & Sons. This book was released on 2022-05-03 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles in Microbiome Engineering Provides an overview of the techniques and applications insight into the complex composition and interactions of microbiomes Microbiomes, the communities of microorganisms that inhabit specific ecosystems or organisms, can be engineered to modify the structure of microbiota and reestablish ecological balance. In recent years, a better understanding of microbial composition and host-microbe interactions has led to the development of new applications for improving human health and increasing agricultural productivity and quality. Principles in Microbiome Engineering introduces readers to the tools and applications involved in manipulating the composition of a microbial community to improve the function of an eco-system. Covering a range of key topics, this up-to-date volume discusses current research in areas such as microbiome-based therapeutics for human diseases, crop plant breeding, animal husbandry, soil engineering, food and beverage applications, and more. Divided into three sections, the text first describes the critical roles of systems biology, synthetic biology, computer modelling, and machine learning in microbiome engineering. Next, the volume explores various state-of-the-art applications, including cancer immunotherapy and prevention of diseases associated with the human microbiome, followed by a concluding section offering perspectives on the future of microbiome engineering and potential applications. Introduces a variety of applications of microbiome engineering in the fields of medicine, agriculture, and food and beverage products Presents current research into the complex interactions and relationships between microbiomes and biotic and abiotic elements of their environments Examines the use of technologies such as Artificial Intelligence (AI), Machine Learning (ML), and Big Data analytics to advance understanding of microbiomes Discusses the engineering of microbiomes to address human health conditions such as neuro psychiatric disorders and autoimmune and inflammatory diseases Edited and authored by leading researchers in the rapidly evolving field, Principles in Microbiome Engineering is an essential resource for biotechnologists, biochemists, microbiologists, pharmacologists, and practitioners working in the biotechnology and pharmaceutical industries.
Download or read book The Smallest Biomolecules Diatomics and their Interactions with Heme Proteins written by Abhik Ghosh and published by Elsevier. This book was released on 2011-10-13 with total page 627 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is not a book on NO biology, nor about hemoglobin, nor about heme-based sensors per se. Of course, it covers all these topics and more, but above all, it aims at providing a truly multidisciplinary perspective of heme-diatomic interactions. The overarching goal is to build bridges among disciplines, to bring about a meeting of minds. The contributors to this book hail from diverse university departments and disciplines – chemistry, biochemistry, molecular biology, microbiology, zoology, physics, medicine and surgery, bringing with them very different views of heme-diatomic interactions. The hope is that the juxtaposition of this diversity will lead to increased exchanges of ideas, approaches, and techniques across traditional disciplinary boundaries. The authors represent a veritable Who's Who of heme protein research and include John Olson, Tom Spiro, Walter Zumft, F. Ann Walker, Teizo Kitagawa, W. Robert Scheidt, Pat Farmer, Marie-Alda Gilles-Gonzalez, and many other equally distinguished scientists. - Extremely distinguished list of authors - Multidisciplinary character – equally suitable for chemists and biochemists - Covers the hottest topics in heme protein research: sensors, NO biology, new roles of hemoglobin, etc.
Download or read book Heme Biology Heme Acts As A Versatile Signaling Molecule Regulating Diverse Biological Processes Second Edition written by Li Zhang and published by World Scientific. This book was released on 2020-02-18 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: This invaluable book provides the first description of the diverse and fascinating functions of heme in life processes for a broad audience. It begins with an introduction of the intricate chemical properties of heme and the history of early observations of human diseases associated with heme. It then proceeds to describe the versatile roles of heme in controlling diverse molecular and cellular processes germane to human life and disease processes. In the second edition, a new chapter is devoted to describe findings about heme uptake, transport, and trafficking of heme synthesis intermediates in mammals. Additionally, a chapter about the newly discovered roles of elevated heme biosynthesis and uptake in lung tumorigenesis is included.Heme Biology is unified and logical in presentation. It is well suited for students and professionals in life sciences who wish to know about the fascinating biology of heme and its usefulness in health and diseases. It may also be used as a reference book for advanced readers and researchers who are interested in heme biology. The explanations in the book are detailed enough to capture the interest of the curious reader, and complete enough to provide the necessary information for researchers to have an in-depth molecular understanding of heme biology and further their studies in this fascinating realm.
Download or read book Prokaryotic Metabolism and Physiology written by Byung Hong Kim and published by Cambridge University Press. This book was released on 2019-05-16 with total page 509 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extensive and up-to-date review of key metabolic processes in bacteria and archaea and how metabolism is regulated under various conditions.
Download or read book Heme Biology The Secret Life Of Heme In Regulating Diverse Biological Processes written by Li Zhang and published by World Scientific. This book was released on 2011-07-19 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This invaluable book provides the first description of the diverse and fascinating functions of heme in life processes for a broad audience. It begins with an introduction to the intricate chemical properties of heme and the history of early observations of human diseases associated with heme. It then proceeds to describe the versatile roles of heme in controlling diverse molecular and cellular processes germane to human life and disease processes. Finally, an up-to-date review of human diseases associated with heme synthesis and application of heme synthesis in photodynamic therapy in cancer treatment is presented.Heme biology is unified and logical in presentation. It is well suited for students and professionals in life sciences who wish to comprehend the fascinating biology of heme and its usefulness in health and diseases. It may also be used as a reference book for advanced readers and researchers who are interested in heme biology. The explanations in the book are detailed enough to capture the interest of the curious reader, and complete enough to provide the necessary information for researchers to have an in-depth molecular understanding of heme biology and further their studies in this fascinating realm.
Download or read book Metal Transporters written by Jose M. Arguello and published by Academic Press. This book was released on 2012-10-25 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume of Current Topics in Membranes focuses on metal transmembrane transporters and pumps, a recently discovered family of membrane proteins with many important roles in the physiology of living organisms. The book summarizes the most recent advances in the field of metal ion transport and provides a broad overview of the major classes of transporters involved in homeostasis of heavy metals. Various families of the transporters and metal specificities are discussed with the focus on the structural and mechanistic aspects of their function and regulation. The reader will access information obtained through a variety of approaches ranging from X-ray crystallography to cell biology and bioinformatics, which have been applied to transporters identified in diverse biological systems, such as pathogenic bacteria, plants, humans and others. Field is cutting-edge and a lot of the information is new to research community Wide breadth of topic coverage Contributors of high renown and expertise
