Implication of Quorum Sensing System in Biofilm Formation and Virulence
Implication of Quorum Sensing System in Biofilm Formation and Virulence

Author: Pallaval Veera Bramhachari

Publisher: Springer

Published: 2019-01-28

Total Pages: 377

ISBN-13: 9811324298

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This book illustrates the importance and significance of Quorum sensing (QS), it’s critical roles in regulating diverse cellular functions in microbes, including bioluminescence, virulence, pathogenesis, gene expression, biofilm formation and antibiotic resistance. Microbes can coordinate population behavior with small molecules called autoinducers (AHL) which serves as a signal of cellular population density, triggering new patterns of gene expression for mounting virulence and pathogenesis. Therefore, these microbes have the competence to coordinate and regulate explicit sets of genes by sensing and communicating amongst themselves utilizing variety of signals. This book descry emphasizes on how bacteria can coordinate an activity and synchronize their response to external signals and regulate gene expression. The chapters of the book provide the recent advancements on various functional aspects of QS systems in different gram positive and gram negative organisms. Finally, the book also elucidates a comprehensive yet a representative description of a large number of challenges associated with quorum sensing signal molecules viz. virulence, pathogenesis, antibiotic synthesis, biosurfactants production, persister cells, cell signaling and biofilms, intra and inter-species communications, host-pathogen interactions, social interactions & swarming migration in biofilms.

Quorum Sensing vs Quorum Quenching: A Battle with No End in Sight
Quorum Sensing vs Quorum Quenching: A Battle with No End in Sight

Author: Vipin Chandra Kalia

Publisher: Springer

Published: 2016-08-23

Total Pages: 0

ISBN-13: 9788132235484

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Microbial relationships with all life forms can be as free living, symbiotic or pathogenic. Human beings harbor 10 times more microbial cells than their own. Bacteria are found on the skin surface, in the gut and other body parts. Bacteria causing diseases are the most worrisome. Most of the infectious diseases are caused by bacterial pathogens with an ability to form biofilm. Bacteria within the biofilm are up to 1000 times more resistant to antibiotics. This has taken a more serious turn with the evolution of multiple drug resistant bacteria. Health Departments are making efforts to reduce high mortality and morbidity in man caused by them. Bacterial Quorum sensing (QS), a cell density dependent phenomenon is responsible for a wide range of expressions such as pathogenesis, biofilm formation, competence, sporulation, nitrogen fixation, etc. Majority of these organisms that are important for medical, agriculture, aquaculture, water treatment and remediation, archaeological departments are: Aeromonas, Acinetobacter, Bacillus, Clostridia, Enterococcus, Pseudomonas, Vibrio and Yersinia spp. Biosensors and models have been developed to detect QS systems. Strategies for inhibiting QS system through natural and synthetic compounds have been presented here. The biotechnological applications of QS inhibitors (QSIs) in diverse areas have also been dealt with. Although QSIs do not affect growth and are less likely to impose selective pressure on bacteria, however, a few reports have raised doubts on the fate of QSIs. This book addresses a few questions. Will bacteria develop mechanisms to evade QSIs? Are we watching yet another defeat at the hands of bacteria? Or will we be acting intelligently and survive the onslaughts of this Never Ending battle?

Biocommunication of Archaea
Biocommunication of Archaea

Author: Guenther Witzany

Publisher: Springer

Published: 2017-09-27

Total Pages: 335

ISBN-13: 3319655361

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Archaea represent a third domain of life with unique properties not found in the other domains. Archaea actively compete for environmental resources. They perceive themselves and can distinguish between ‘self’ and ‘non-self’. They process and evaluate available information and then modify their behaviour accordingly. They assess their surroundings, estimate how much energy they need for particular goals, and then realize the optimum variant. These highly diverse competences show us that this is possible owing to sign(aling)- mediated communication processes within archaeal cells (intra-organismic), between the same, related and different archaeal species (interorganismic), and between archaea and nonarchaeal organisms (transorganismic). This is crucial in coordinating growth and development, shape and dynamics. Such communication must function both on the local level and between widely separated colony parts. This allows archaea to coordinate appropriate response behaviors in a differentiated manner to their current developmental status and physiological influences. This book will orientate further investigations on how archaeal ecosphere inhabitants communicate with each other to coordinate their behavioral patterns and whats the role of viruses in this highly dynamic interactional networks.

Experiments in the Purification and Characterization of Enzymes
Experiments in the Purification and Characterization of Enzymes

Author: Thomas E. Crowley

Publisher: Academic Press

Published: 2014-01-11

Total Pages: 267

ISBN-13: 0124095933

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Experiments in the Purification and Characterization of Enzymes: A Laboratory Manual provides students with a working knowledge of the fundamental and advanced techniques of experimental biochemistry. Included are instructions and experiments that involve purification and characterization of enzymes from various source materials, giving students excellent experience in kinetics analysis and data analysis. Additionally, this lab manual covers how to evaluate and effectively use scientific data. By focusing on the relationship between structure and function in enzymes, Experiments in the Purification and Characterization of Enzymes: A Laboratory Manual provides a strong research foundation for students enrolled in a biochemistry lab course by outlining how to evaluate and effectively use scientific data in addition to offering students a more hands-on approach with exercises that encourage them to think deeply about the content and to design their own experiments. Instructors will find this book useful because the modular nature of the lab exercises allows them to apply the exercises to any set of proteins and incorporate the exercises into their courses as they see fit, allowing for greater flexibility in the use of the material. Written in a logical, easy-to-understand manner, Experiments in the Purification and Characterization of Enzymes: A Laboratory Manual is an indispensable resource for both students and instructors in the fields of biochemistry, molecular biology, chemistry, pharmaceutical chemistry, and related molecular life sciences such as cell biology, neurosciences, and genetics. - Offers project lab formats for students that closely simulate original research projects - Provides instructional guidance for students to design their own experiments - Includes advanced analytical techniques - Contains adaptable modular exercises that allow for the study proteins other than FNR, LuxG and LDH - Includes access to a website with additional resources for instructors

Bacterial Signaling
Bacterial Signaling

Author: Reinhard Krämer

Publisher: John Wiley & Sons

Published: 2009-12-09

Total Pages: 513

ISBN-13: 3527629246

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Providing a comprehensive insight into cellular signaling processes in bacteria with a special focus on biotechnological implications, this is the first book to cover intercellular as well as intracellular signaling and its relevance for biofilm formation, host pathogen interactions, symbiotic relationships, and photo- and chemotaxis. In addition, it deals in detail with principal bacterial signaling mechanisms -- making this a valuable resource for all advanced students in microbiology. Dr. Krämer is a world-renowned expert in intracellular signaling and its implications for biotechnology processes, while Dr. Jung is an expert on intercellular signaling and its relevance for biomedicine and agriculture.

Bacterial Signal Transduction: Networks and Drug Targets
Bacterial Signal Transduction: Networks and Drug Targets

Author: Ryutaro Utsumi

Publisher: Springer Science & Business Media

Published: 2008-12-05

Total Pages: 257

ISBN-13: 0387788859

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This fascinating book encourages many microbiologists and students to enter the new world of signal transduction in microbiology. Over the past decade, a vast amount of exciting new information on the signal transduction pathway in bacteria has been unearthed.

Purification and Characterization of Secondary Metabolites
Purification and Characterization of Secondary Metabolites

Author: Thomas E. Crowley

Publisher: Academic Press

Published: 2019-08-10

Total Pages: 215

ISBN-13: 0128139439

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Purification and Characterization of Secondary Metabolites: A Laboratory Manual for Analytical and Structural Biochemistry provides students with working knowledge of the fundamental and advanced techniques of experimental biochemistry. Sections provide an overview of the microbiological and biochemical methods typically used for the purification of metabolites and discuss the biological significance of secondary metabolites secreted by three diverse species of bacteria. Additionally, this lab manual covers the theory and practice of the most commonly-used techniques of analytical biochemistry, UV-vis and IR spectrophotometry, high-performance liquid chromatography, mass spectrometry, X-ray crystallography and nuclear magnetic resonance, and how to evaluate and effectively use scientific data. Instructors will find this book useful because of the modular nature of the lab exercises included. Written in a logical, easy-to-understand manner, this book is an indispensable resource for both students and instructors. - Offers project lab formats for students that closely simulate original research projects - Provides instructional guidance for students to design their own experiments - Presents advanced analytical techniques - Includes access to a website with additional resources for instructors

Microbial Extracellular Polymeric Substances
Microbial Extracellular Polymeric Substances

Author: Jost Wingender

Publisher: Springer Science & Business Media

Published: 2012-12-06

Total Pages: 266

ISBN-13: 3642601472

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Microbial extracellular polymeric substances (EPS) are the key components for the aggregation of microorganisms in biofilms, flocs and sludge. They are composed of polysaccharides, proteins, nucleic acids, lipids and other biological macromolecules. EPS provide a highly hydrated gel matrix in which microbial cells can establish stable synergistic consortia. Cohesion and adhesion as well as morphology, structure, biological function and other properties such as mechanical stability, diffusion, sorption and optical properties of microbial aggregates are determined by the EPS matrix. Also, the protection of biofilm organisms against biocides is attributed to the EPS. Their matrix allows phase separation in biofiltration and is also important for the degradation of particulate material which is of great importance for the self purification processes in surface waters and for waste water treatment.

Comprehensive Natural Products II
Comprehensive Natural Products II

Author:

Publisher: Elsevier

Published: 2010-03-05

Total Pages: 7944

ISBN-13: 0080453821

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This work presents a definitive interpretation of the current status of and future trends in natural products—a dynamic field at the intersection of chemistry and biology concerned with isolation, identification, structure elucidation, and chemical characteristics of naturally occurring compounds such as pheromones, carbohydrates, nucleic acids, and enzymes. With more than 1,800 color figures, Comprehensive Natural Products II features 100% new material and complements rather than replaces the original work (©1999). Reviews the accumulated efforts of chemical and biological research to understand living organisms and their distinctive effects on health and medicine Stimulates new ideas among the established natural products research community—which includes chemists, biochemists, biologists, botanists, and pharmacologists Informs and inspires students and newcomers to the field with accessible content in a range of delivery formats Includes 100% new content, with more than 6,000 figures (1/3 of these in color) and 40,000 references to the primary literature, for a thorough examination of the field Highlights new research and innovations concerning living organisms and their distinctive role in our understanding and improvement of human health, genomics, ecology/environment, and more Adds to the rich body of work that is the first edition, which will be available for the first time in a convenient online format giving researchers complete access to authoritative Natural Products content