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Stress And Environmental Regulation Of Gene Expression And Adaptation In Bacteria 2 Volume Set

Author: Frans J. de Bruijn
Publisher: John Wiley & Sons
ISBN: 1119004888
Size: 67.83 MB
Format: PDF
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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.

Pseudomonas And Acinetobacter From Drug Resistance To Pathogenesis

Author: Ghassan M. Matar
Publisher: Frontiers Media SA
ISBN: 288945469X
Size: 68.80 MB
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Pseudomonas aeruginosa and Acinetobacter baumannii are among the most common non-lactose-fermenting Gram-negative pathogens responsible for hospital-acquired infections, especially in intensive care units (ICUs). The treatment of infections caused by these bacteria is complicated due to the emergence of multi-drug resistance as the two species are noted for their intrinsic resistance to antimicrobial agents and their ability to acquire genetic elements that encode for resistance determinants. In both species, resistance to multiple classes of antimicrobial agents can seriously compromise the ability to treat infected patients, especially the immunocompromised. Consequently, very few antimicrobials remain as treatment options. Mechanisms of resistance in both of these pathogens include the production of β-lactamases and aminoglycoside-modifying enzymes as well as reduced or lack of expression of outer membrane proteins, mutations in topoisomerases, and up-regulation of efflux pumps. To that purpose, the findings of the studies included in this book deal with the prevalence of resistant isolates to various antimicrobial agents in both P. aeruginosa and A. baumannii, their underlying mechanisms of resistance, their virulence factors, their pathogenesis, and prospective treatment options. Special thanks are due to Mr. Bassam El-Hafi for facilitating procedures involved in this publication.

Regulation Of Bacterial Virulence

Author: Michael L. Vasil
Publisher: American Society for Microbiology Press
ISBN: 1555816762
Size: 16.16 MB
Format: PDF, Docs
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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.

Bacterial Regulatory Networks

Author: Alain Filloux
Publisher: Horizon Scientific Press
ISBN: 1908230037
Size: 45.27 MB
Format: PDF, ePub
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Regulatory networks enable bacteria to adapt to almost every environmental niche on Earth. Regulation is achieved by a network of interactions among diverse types of molecules, including DNA, RNA, proteins, and metabolites. The primary role of regulatory networks in bacteria is to control the response to environmental changes, such as nutritional status and environmental stress. A complex organization of networks allows the organism to coordinate and integrate multiple environmental signals. This book contains authoritative, up-to-date reviews of the current research and theories on regulatory networks in bacteria. The book includes critical reviews written by the leading research scientists in this topical field. The contributors fully explore various regulatory networks, discuss variations of common themes, and provide fresh insights into bacterial regulatory mechanisms. Topics include: the sigma network in Escherichia coli * the control of bacterial virulence * ECF sigma factors * quorum sensing * cyclic di-GMP * RNA-mediated regulation * the H-NS regulator * two-component regulatory systems * bacterial chemotaxis * the regulation of iron homeostasis * anaerobic regulatory networks * bacterial bistable regulatory networks * the evolution of transcription factors and regulatory networks. This book will be essential reading for everyone interested in gene expression and the regulation in bacteria. It is a recommended text for all microbiology libraries.

Environmental Stressors And Gene Responses

Author: J.M. Storey
Publisher: Elsevier
ISBN: 9780080531120
Size: 57.10 MB
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Cell and Molecular Responses to Stress is a new multi-volume book series from Elsevier Science that focuses on how organisms respond at a molecular level to environmental stresses imposed upon them. All organisms deal with variations in multiple environmental factors including temperature, oxygen, salinity, and water availability. Many show amazing tolerances to extreme stress with remarkable biochemical adaptations that allow life to persist under very difficult circumstances. This series explores the molecular mechanisms by which cells and organisms respond to stress, focusing on the variations in metabolic response that allow some cells and organisms to deal with extreme stress, others to endure stress within strict limits, and others to have a very low tolerance for changes in environmental parameters. Articles from within the series highlight the elastic limits of molecular responses in Nature, with examples drawn from animal, plant and bacteria systems. Volume 1, begins by considering some of the roles of environmental stress in determining the geographic distribution of animals and in promoting species divergence and then explores gene expression and metabolic responses to environmental stress with examples of adaptation to high and low temperature, osmotic, anoxia/ischemia, desiccation, high pressure and heavy metal stresses.

Stress Response In Microbiology

Author: Jose M. Requena
Publisher: Horizon Scientific Press
ISBN: 1908230045
Size: 38.59 MB
Format: PDF, Mobi
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To survive adverse and fluctuating conditions, microorganisms possess mechanisms to recognize diverse environmental changes and mount an appropriate response. Microorganisms frequently react simultaneously to a wide variety of stresses, and the various stress response systems interact with each other by a complex of global regulatory networks. Stress response systems can play an important role in the virulence of pathogenic organisms. In this book, expert contributors from around the world summarize the current knowledge on microbial stress response and comprehensively review the recent findings that have greatly advanced the understanding of stress response systems. Each chapter is devoted to a particular organism or group of organisms, including: Gram-negative bacteria * Streptococcus * Neisseria * Listeria monocytogenes * Bacillus cereus * Salmonella * Yersinia * Vibrio * Mycobacterium * mycoplasmas * yeast * Plasmodium falciparum * Toxoplasma gondii * Leishmania * Trypanosoma cruzi * Trypanosoma brucei * Entamoeba histolytica. In addition to providing an up-to-date review of current trends, the book also describes the challenges for future research and provides comprehensive reference sections. It represents a major collection of information and knowledge across a wide range of microorganisms and is highly recommended for anyone interested in stress response, regulatory networks, environmental microbiology, or the pathogenicity of microorganisms.

Molecular Medical Microbiology Three Volume Set

Author: Yi-Wei Tang
Publisher: Elsevier
ISBN: 0080536883
Size: 35.83 MB
Format: PDF, Kindle
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The molecular age has brought about dramatic changes in medical microbiology, and great leaps in our understanding of the mechanisms of infectious disease. Molecular Medical Microbiology is the first book to synthesise the many new developments in both molecular and clinical research in a single comprehensive resource. This timely and authoritative 3-volume work is an invaluable reference source of medical bacteriology. Comprising over 100 chapters, organised into 17 major sections, the scope of this impressive work is wide-ranging. Written by experts in the field, chapters include cutting edge information, and clinical overviews for each major bacterial group, in addition to the latest updates on vaccine development, molecular technology and diagnostic technology. * The first comprehensive and accessible reference on Molecular Medical Microbiology * Two color presentation throughout * Full colour plate section * Fully integrated and meticulously organised * In depth discussion of individual pathogenic bacteria in a system-oriented approach * Includes a clinical overview for each major bacterial group * Presents the latest information on vaccine development, molecular technology and diagnostic technology * Extensive indexing and cross-referencing throughout * Over 100 chapters covering all major groups of bacteria * Written by an international panel of authors expert in their respective disciplines * Over 2300 pages in three volumes

Bacterial Stress Responses

Author: Gisela Storz
Publisher: American Society for Microbiology Press
ISBN: 1555816215
Size: 72.40 MB
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Gain new insight on utilizing bacterial stress responses to better combat bacterial infection with antibiotics and improve biotechnology. • Reviews the vast number of new findings that have greatly advanced the understanding of bacterial stress responses in the past 10 years. • Explores general regulatory principles, including the latest findings from genomics studies, including new research findings on both specific and general stress responses. • Details how stress responses affect the interactions between bacteria and host cells and covers bacterial stress responses in different niches and communities, with an emphasis on extreme environments.

Plant Metabolites And Regulation Under Environmental Stress

Author: Parvaiz Ahmad
Publisher: Academic Press
ISBN: 0128126906
Size: 52.60 MB
Format: PDF, Mobi
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Plant Metabolites and Regulation Under Environmental Stress presents the latest research on both primary and secondary metabolites. The book sheds light on the metabolic pathways of primary and secondary metabolites, the role of these metabolites in plants, and the environmental impact on the regulation of these metabolites. Users will find a comprehensive, practical reference that aids researchers in their understanding of the role of plant metabolites in stress tolerance. Highlights new advances in the understanding of plant metabolism Features 17 protocols and methods for analysis of important plant secondary metabolites Includes sections on environmental adaptations and plant metabolites, plant metabolites and breeding, plant microbiome and metabolites, and plant metabolism under non-stress conditions

Stress Activated Protein Kinases

Author: Francesc Posas
Publisher: Springer Science & Business Media
ISBN: 3540755691
Size: 54.66 MB
Format: PDF, Mobi
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In this book leading researchers in the field discuss the state-of-the-art of many aspects of SAPK signaling in various systems from yeast to mammals. These include various chapters on regulatory mechanisms as well as the contribution of the SAPK signaling pathways to processes such as gene expression, metabolism, cell cycle regulation, immune responses and tumorigenesis. Written by international experts, the book will appeal to cell biologists and biochemists.