Download or read book The Regulation of Genes of Unknown Function Implicated in Nitrosative Stress Tolerance in Escherichia Coli K 12 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was designed to determine the regulatory network that controls expression from two \(Escherichia\) \(coli\) K-12 promoters, \(pyeaR\) and \(pogt\), during anaerobic growth. These promoters were identified from transcriptomic studies as being positively regulated by NarL independently of FNR, the master regulator of anaerobic respiration. Biochemical and genetic analyses presented in this study confirmed that expression from both the \(yeaR\) and \(ogt\) promoters is dependent upon NarL, which binds to a single site in the \(yeaR\) promoter and two sites in the \(ogt\) promoter. The nucleoid-associated protein, Fis, repressed transcription from both promoters, especially in rich medium, by binding to sites that overlap the NarL site, excluding the essential activator. Both promoters were more active in the absence of functional FNR. However, mutational analysis revealed that FNR does not bind to the \(yeaR\) promoter region, so this effect is indirect. How the absence of functional FNR might affect NarL-dependent nitrite signalling was investigated. The Ogt protein is known function as an O\(^6\)-alkyguanine methyltransferase. However, the functions of the gene products of \(yeaR-yoaG\) and another operon implicated in nitrosative stress management, \(hcp-hcr\), were unknown. Strains carrying a chromosomal \(yeaR-yoaG\) deletion were not more sensitive to nitric oxide or hydroxylamine compared with the parental strain, suggesting that the products of this operon are not essential for dealing with these toxic nitrogen species. Conversely, a strain deleted in \(hcp-hcr\) was shown to be slightly more sensitive to both nitric oxide and hydroxylamine, implicating Hcp and Hcr in nitrosative stress management.
Download or read book The Regulation of Genes of Unknown Function Implicated in Nitrosative Stress Tolerance in Escherichia Coli K 12 written by and published by . This book was released on 2009 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Systematic Mutagenesis of Escherichia Coli Genome and Genome wide Expression Analysis Indicates that FNR of E Coli K12 Regulates a Large Number of Genes of Unknown Function written by Yisheng Kang and published by . This book was released on 2005 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Microbial Physiology written by Robert K. Poole and published by Academic Press. This book was released on 2018-09-24 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitric Oxide and Other Small Signalling Molecules, Volume 73, the latest release in the Advances in Microbial Physiology series, continues the long tradition of topical, important, cutting-edge reviews in microbiology. The book contains updates in the field, with comprehensive chapters covering Nitric Oxide and Urinary Pathogens, Antibiotic Lethality and pH Homeostasis, Antimicrobial Strategies for Avian Pathogens and Bioactive Peptides from Marine Sources for Biotechnological Applications, and more. - Contains contributions from leading authorities in microbial physiology - Informs and updates on all the latest developments in the field of microbial physiology
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 Stress and Environmental Regulation of Gene Expression and Adaptation in Bacteria written by Frans J. de Bruijn and published by John Wiley & Sons. This book was released on 2016-07-13 with total page 1472 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bacteria in various habitats are subject to continuously changing environmental conditions, such as nutrient deprivation, heat and cold stress, UV radiation, oxidative stress, dessication, acid stress, nitrosative stress, cell envelope stress, heavy metal exposure, osmotic stress, and others. In order to survive, they have to respond to these conditions by adapting their physiology through sometimes drastic changes in gene expression. In addition they may adapt by changing their morphology, forming biofilms, fruiting bodies or spores, filaments, Viable But Not Culturable (VBNC) cells or moving away from stress compounds via chemotaxis. Changes in gene expression constitute the main component of the bacterial response to stress and environmental changes, and involve a myriad of different mechanisms, including (alternative) sigma factors, bi- or tri-component regulatory systems, small non-coding RNA’s, chaperones, CHRIS-Cas systems, DNA repair, toxin-antitoxin systems, the stringent response, efflux pumps, alarmones, and modulation of the cell envelope or membranes, to name a few. Many regulatory elements are conserved in different bacteria; however there are endless variations on the theme and novel elements of gene regulation in bacteria inhabiting particular environments are constantly being discovered. Especially in (pathogenic) bacteria colonizing the human body a plethora of bacterial responses to innate stresses such as pH, reactive nitrogen and oxygen species and antibiotic stress are being described. An attempt is made to not only cover model systems but give a broad overview of the stress-responsive regulatory systems in a variety of bacteria, including medically important bacteria, where elucidation of certain aspects of these systems could lead to treatment strategies of the pathogens. Many of the regulatory systems being uncovered are specific, but there is also considerable “cross-talk” between different circuits. Stress and Environmental Regulation of Gene Expression and Adaptation in Bacteria is a comprehensive two-volume work bringing together both review and original research articles on key topics in stress and environmental control of gene expression in bacteria. Volume One contains key overview chapters, as well as content on one/two/three component regulatory systems and stress responses, sigma factors and stress responses, small non-coding RNAs and stress responses, toxin-antitoxin systems and stress responses, stringent response to stress, responses to UV irradiation, SOS and double stranded systems repair systems and stress, adaptation to both oxidative and osmotic stress, and desiccation tolerance and drought stress. Volume Two covers heat shock responses, chaperonins and stress, cold shock responses, adaptation to acid stress, nitrosative stress, and envelope stress, as well as iron homeostasis, metal resistance, quorum sensing, chemotaxis and biofilm formation, and viable but not culturable (VBNC) cells. Covering the full breadth of current stress and environmental control of gene expression studies and expanding it towards future advances in the field, these two volumes are a one-stop reference for (non) medical molecular geneticists interested in gene regulation under stress.
Download or read book Mechanisms of antibiotic resistance written by Jun Lin and published by Frontiers Media SA. This book was released on 2015-06-01 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antibiotics represent one of the most successful forms of therapy in medicine. But the efficiency of antibiotics is compromised by the growing number of antibiotic-resistant pathogens. Antibiotic resistance, which is implicated in elevated morbidity and mortality rates as well as in the increased treatment costs, is considered to be one of the major global public health threats (www.who.int/drugresistance/en/) and the magnitude of the problem recently prompted a number of international and national bodies to take actions to protect the public (http://ec.europa.eu/dgs/health_consumer/docs/road-map-amr_en.pdf: http://www.who.int/drugresistance/amr_global_action_plan/en/; http://www.whitehouse.gov/sites/default/files/docs/carb_national_strategy.pdf). Understanding the mechanisms by which bacteria successfully defend themselves against the antibiotic assault represent the main theme of this eBook published as a Research Topic in Frontiers in Microbiology, section of Antimicrobials, Resistance, and Chemotherapy. The articles in the eBook update the reader on various aspects and mechanisms of antibiotic resistance. A better understanding of these mechanisms should facilitate the development of means to potentiate the efficacy and increase the lifespan of antibiotics while minimizing the emergence of antibiotic resistance among pathogens.
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 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
Download or read book Nitric Oxide written by Lester Packer and published by Gulf Professional Publishing. This book was released on 1999 with total page 636 pages. Available in PDF, EPUB and Kindle. Book excerpt: General Description of the Volume: Nitric Oxide, recently designated "Molecule of the Year," impinges on a wide range of fields in biological research, particularly in the areas of biomedicine and cell and organismal biology, as well as in fundamental chemistry. This volume will be a valuable resource for the experienced researcher as well as for those newly entering the field. This volume continues the coverage of new and important tools for the elucidation of Nitric Oxide action initiated in Volumes 268 and 269 of Methods in Enzymology. Techniques for researching the physiology and toxicity of nitric oxide in cellular and organismal systems are highlighted. General Description of the Series: The critically acclaimed laboratory standard for more than forty years, Methods in Enzymology is one of the most highly respected publications in the field of biochemistry. Since 1955, each volume has been eagerly awaited, frequently consulted, and praised by researchers and reviewers alike. Now with more than 300 volumes (all of them still in print), the series contains much material still relevant today--truly an essential publication for researchers in all fields of life sciences. Key Features * Biological Activity * NO Donors: Nitrosothiols and Nitroxyls * Peroxynitrite * Oxidant and Antioxidant Action.
Download or read book Abiotic Stress Adaptation in Plants written by Ashwani Pareek and published by Springer Science & Business Media. This book was released on 2009-12-12 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental insults such as extremes of temperature, extremes of water status as well as deteriorating soil conditions pose major threats to agriculture and food security. Employing contemporary tools and techniques from all branches of science, attempts are being made worldwide to understand how plants respond to abiotic stresses with the aim to help manipulate plant performance that will be better suited to withstand these stresses. This book on abiotic stress attempts to search for possible answers to several basic questions related to plant responses towards abiotic stresses. Presented in this book is a holistic view of the general principles of stress perception, signal transduction and regulation of gene expression. Further, chapters analyze not only model systems but extrapolate interpretations obtained from models to crops. Lastly, discusses how stress-tolerant crop or model plants have been or are being raised through plant breeding and genetic engineering approaches. Twenty three chapters, written by international authorities, integrate molecular details with overall plant structure and physiology, in a text-book style, including key references.
Download or read book Biochemical Plant Pathology written by J. A. Callow and published by . This book was released on 1983-01-01 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Redox Proteomics written by Isabella Dalle-Donne and published by John Wiley & Sons. This book was released on 2006-08-11 with total page 978 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methodology and applications of redox proteomics The relatively new and rapidly changing field of redox proteomics has the potential to revolutionize how we diagnose disease, assess risks, determine prognoses, and target therapeutic strategies for people with inflammatory and aging-associated diseases. This collection brings together, in one comprehensive volume, a broad array of information and insights into normal and altered physiology, molecular mechanisms of disease states, and new applications of the rapidly evolving techniques of proteomics. Written by some of the finest investigators in this area, Redox Proteomics: From Protein Modifications to Cellular Dysfunction and Diseases examines the key topics of redox proteomics and redox control of cellular function, including: * The role of oxidized proteins in various disorders * Pioneering studies on the development of redox proteomics * Analytical methodologies for identification and structural characterization of proteins affected by oxidative/nitrosative modifications * The response and regulation of protein oxidation in different cell types * The pathological implications of protein oxidation for conditions, including asthma, cardiovascular disease, diabetes, preeclampsia, and Alzheimer's disease Distinguished by its in-depth discussions, balanced methodological approach, and emphasis on medical applications and diagnosis development, Redox Proteomics is a rich resource for all professionals with an interest in proteomics, cellular physiology and its alterations in disease states, and related fields.
Download or read book Plant Signaling Molecules written by M. Iqbal R. Khan and published by Woodhead Publishing. This book was released on 2019-03-15 with total page 597 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant Signaling Molecule: Role and Regulation under Stressful Environments explores tolerance mechanisms mediated by signaling molecules in plants for achieving sustainability under changing environmental conditions. Including a wide range of potential molecules, from primary to secondary metabolites, the book presents the status and future prospects of the role and regulation of signaling molecules at physiological, biochemical, molecular and structural level under abiotic stress tolerance. This book is designed to enhance the mechanistic understanding of signaling molecules and will be an important resource for plant biologists in developing stress tolerant crops to achieve sustainability under changing environmental conditions. - Focuses on plant biology under stress conditions - Provides a compendium of knowledge related to plant adaptation, physiology, biochemistry and molecular responses - Identifies treatments that enhance plant tolerance to abiotic stresses - Illustrates specific physiological pathways that are considered key points for plant adaptation or tolerance to abiotic stresses
Download or read book Biology of the Nitrogen Cycle written by Hermann Bothe and published by Elsevier. This book was released on 2007 with total page 451 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pyrolysis Oils from Biomass written by Ed J. Soltes and published by . This book was released on 1988 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brings together specialists to present the state-of-the-science in the complete fuel cycle--from feedstock to upgraded liquid fuels suitable for replacements for petroleum-derived fuels. Offers a discussion of biomass pyrolysis and its place in the renewable fuel economy. Presents the technology of pyrolysis oil production. Describes analysis of the oils by characterization, kinetics, and chromatographic techniques. Concludes with a discussion of upgrading pyrolysis oils to liquid fuels.
Download or read book Alternative Respiratory Pathways in Higher Plants written by Kapuganti Jagadis Gupta and published by John Wiley & Sons. This book was released on 2015-06-15 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapid developments in molecular and systems biology techniques have allowed researchers to unravel many new mechanisms through which plant cells switch over to alternative respiratory pathways. This book is a unique compendium of how and why higher plants evolved alternative respiratory metabolism. It offers a comprehensive review of current research in the biochemistry, physiology, classification and regulation of plant alternative respiratory pathways, from alternative oxidase diversity to functional marker development. The resource provides a broad range of perspectives on the applications of plant respiratory physiology, and suggests brand new areas of research. Other key features: written by an international team of reputed plant physiologists, known for their pioneering contributions to the knowledge of regular and alternative respiratory metabolism in higher plants includes step-by-step protocols for key molecular and imaging techniques advises on regulatory options for managing crop yields, food quality and environment for crop improvement and enhanced food security covers special pathways which are of key relevance in agriculture, particularly in plant post-harvest commodities Primarily for plant physiologists and plant biologists, this authoritative compendium will also be of great value to postdoctoral researchers working on plant respiration, as well as to graduate and postgraduate students and university staff in Plant Science. It is a useful resource for corporate and private firms involved in developing functional markers for breeding programs and controlling respiration for the prevention of post-harvest losses in fruit, vegetables, cut flowers and tubers.
