Download or read book Biophysical and RNA binding Characterization of Hfq Proteins from Neisseria Meningitidis Vibrio Cholerae and Escherichia Coli written by Tomasz Krzysztof Kabziński and published by . This book was released on 2012 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ESR Spektroskopie in der industriellen Glasanalytik written by Institut für Werkstoffwissenschaften Lehrstuhl Werkstoffwissenschaft (Glas und Keramik) and published by . This book was released on 2001 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of the RNA binding Properties of Hfq Proteins from the Bacteria Escherichia Coli Listeria Monocytogenes and Caulobacter Crescentus written by Kelly Chambers and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Bacterial small, noncoding (s)RNAs play important roles in post-transcriptional gene regulation through complementary base-pairing interactions with target messenger (m)RNA molecules,. Many sRNAs rely on protein partners to carry out their regulatory functions. As such, the interactions between proteins and small RNAs contribute to gene regulation across all three domains of life. In particular, the hexameric RNA chaperone protein, Hfq, has been shown to mediate interactions between bacterial small (s)RNAs and their target mRNAs as a part of bacterial stress responses. Hfq orthologues have been characterized in approximately half of all sequenced bacterial species. This protein functions to stabilize sRNA steady-state expression levels, protect sRNAs from cleavage, accelerate efficient base pairing between sRNA and mRNA to activate or repress translation, and may recruit cellular endonucleases to degrade the transcript following repression. To examine the RNA- and protein-binding properties of Hfq proteins in Escherichia coli, Listeria monocytogenes, and Caulobacter crescentus, I utilized a set of two transcription-based bacterial-hybrid assays designed to detect these interactions in vivo. In the bacterial two-hybrid assay (B2H), Hfq monomers from each bacterial species displayed inter- and intra-species multimerization, supporting the notion that hexamerization is a conserved feature of Hfq orthologs. Through the utilization of a novel bacterial three-hybrid assay designed to detect RNA-protein interactions in vivo, I report that the Hfq protein from each of these species is able to recognize a variety of sRNAs with unique binding patterns. A comparative analysis of the relative interaction strengths of Hfq from each of these species with a panel of E. coli sRNAs shows that the C. crescentus Hfq often displays stronger sRNA-binding interactions than E. coli Hfq and L. monocytogenes Hfq. Further analysis of these three proteins at the level of primary sequence and tertiary structure suggests that the presence of certain ionizable amino acid residues in the Hfq sequence may play particularly important roles in binding sRNAs across bacterial species.
Download or read book Characterizing the RNA binding and Chaperone Activites of the E Coli Proteins H NS and Hfq written by Cristin Coco Brescia and published by . This book was released on 2003 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bacterial Physiology written by Walid El-Sharoud and published by Springer Science & Business Media. This book was released on 2007-12-07 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: The application of new molecular methodologies in the study of bacterial behavior and cell architecture has enabled new revolutionary insights and discoveries in these areas. This new text presents recent developments in bacterial physiology that are highly relevant to a wide range of readership including those interested in basic and applied knowledge. Its chapters are written by international scientific authorities at the forefront of the subject. The value of this recent knowledge in bacterial physiology is not only restricted to fundamental biology. It also extends to biotechnology and drug-discovery disciplines.
Download or read book Modern Microbial Genetics written by Uldis N. Streips and published by John Wiley & Sons. This book was released on 2004-03-24 with total page 673 pages. Available in PDF, EPUB and Kindle. Book excerpt: In accordance with its predecessor, the completely revised and expanded Second Edition of Modern Microbial Genetics focuses on how bacteria and bacteriophage arrange and rearrange their genetic material through mutation, evolution, and genetic exchange to take optimal advantage of their environment. The text is divided into three sections: DNA Metabolism, Genetic Response, and Genetic Exchange. The first addresses how DNA replicates, repairs itself, and recombines, as well as how it may be manipulated. The second section is devoted to how microorganisms interact with their environment, including chapters on sporulation and stress shock, and the final section contains the latest information on classic exchange mechanisms such as transformation and conjugation. Chapters include: * Gene Expression and Its Regulation * Single-Stranded DNA Phages * Genetic Tools for Dissecting Motility and Development of Myxococcus xanthus * Molecular Mechanism of Quorum Sensing * Transduction in Gram-Negative Bacteria * Genetic Approaches in Bacteria with No Natural Genetic Systems The editors also cultivate an attention to global regulatory systems throughout the book, elucidating how certain genes and operons in bacteria, defined as regulons, network and cooperate to suit the needs of the bacterial cell. With clear appreciation for the impact of molecular genomics, this completely revised and updated edition proves that Modern Microbial Genetics remains the benchmark text in its field.
Download or read book Efflux Mediated Antimicrobial Resistance in Bacteria written by Xian-Zhi Li and published by Springer. This book was released on 2016-11-09 with total page 850 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, written by leading international experts, provides a comprehensive, current examination of transport-mediated antimicrobial resistance. As a particularly powerful mechanism of multidrug resistance, an in-depth examination of efflux pumps is conducted with bacteria of major public health concern including Enterobacteriaceae, Acinetobacter, Neisseria, Pseudomonas, staphylococci, and mycobacteria. The content spans structural biochemistry and transport mechanisms of the major transporter families and considers individual drug efflux systems across various Gram-positive and Gram-negative species. Genomic analysis of efflux pump distribution and their contribution to clinically-relevant resistance are a major focus of the text. Moreover, interplay between drug efflux pumps and other key resistance mechanisms such as intrinsic drug impermeability, inactivation, and target alterations are discussed, as well as their molecular expression-based regulation and physiological functions beyond resistance, involving biofilms, stress response, and pathogenicity. Finally, strategies are addressed to target this drug resistance mechanism with novel antimicrobials or drug inhibitor adjuvants.
Download or read book Prokaryotic Cell Wall Compounds written by Helmut König and published by Springer Science & Business Media. This book was released on 2010-03-18 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microbial cell wall structures play a significant role in maintaining cells’ shape, as protecting layers against harmful agents, in cell adhesion and in positive and negative biological activities with host cells. All prokaryotes, whether they are bacteria or archaea, rely on their surface polymers for these multiple functions. Their surfaces serve as the indispensable primary interfaces between the cell and its surroundings, often mediating or catalyzing important interactions. Prokaryotic Cell Wall Compounds summarizes the current state of knowledge on the prokaryotic cell wall. Topics concerning bacterial and archaeal polymeric cell wall structures, biological activities, growth and inhibition, cell wall interactions and the applications of cell wall components, especially in the field of nanobiotechnology, are presented.
Download or read book Bacterial Genomes and Infectious Diseases written by Ricky V.L Chan and published by Springer Science & Business Media. This book was released on 2007-11-06 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first bacterial genome, Haemophilus influenzae, was completely sequenced, annotated, and published in 1995. Today, more than 200 prokaryotic (archaeal and bacterial) genomes have been completed and over 500 prokaryotic genomes are in va- ous stages of completion. Seventeen eukaryotic genomes plus four eukaryotic chro- somes have been completed. The concept of achieving better understanding of an organism through knowledge of the complete genomic sequence was first demonstrated in 1978 when the first bacteriophage genome, X174, was sequenced. Complete genomic sequences of prokaryotes have led to a better understanding of the biology and evolution of the microbes, and, for pathogens, facilitated identification of new vaccine candidates, putative virulence genes, targets for antibiotics, new strategy for rapid diagnosis, and investigation of bacteria–host interactions and disease mec- nisms. Recent increased interest in microbial pathogens and infectious diseases is largely attributed to the re-emergence of infectious diseases like tuberculosis, emergence of new infectious diseases like AIDS and severe acute respiratory syndrome, the problem of an increasing rate of emergence of antibiotic-resistant variants of pathogens, and the fear of bioterrorism. Microbes are highly diverse and abundant in the biosphere. Less than 1% of these morphologically identified microbes can be cultured in vitro using standard techniques and conditions. With such abundance of microbes in nature, we can expect to see new variants and new species evolve and a small number will emerge as pathogens to humans.
Download or read book Archaeal Ribosomes Biogenesis Structure and Function written by Paola Londei and published by Frontiers Media SA. This book was released on 2022-01-24 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biotechnology of Biopolymers written by Magdy Elnashar and published by BoD – Books on Demand. This book was released on 2011-07-05 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book Biotechnology of Biopolymers omprises 17 chapters covering occurrence, synthesis, isolation and production, properties and applications, biodegradation and modification, the relevant analysis methods to reveal the structures and properties of biopolymers and a special section on the theoretical, experimental and mathematical models of biopolymers. This book will hopefully be supportive to many scientists, physicians, pharmaceutics, engineers and other experts in a wide variety of different disciplines, in academia and in industry. It may not only support research and development but may be also suitable for teaching. Publishing of this book was achieved by choosing authors of the individual chapters for their recognized expertise and for their excellent contributions to the various fields of research.
Download or read book Bacterial Regulatory RNA written by Veronique Arluison and published by . This book was released on 2018 with total page 395 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hands On Machine Learning with R written by Brad Boehmke and published by CRC Press. This book was released on 2019-11-07 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hands-on Machine Learning with R provides a practical and applied approach to learning and developing intuition into today’s most popular machine learning methods. This book serves as a practitioner’s guide to the machine learning process and is meant to help the reader learn to apply the machine learning stack within R, which includes using various R packages such as glmnet, h2o, ranger, xgboost, keras, and others to effectively model and gain insight from their data. The book favors a hands-on approach, providing an intuitive understanding of machine learning concepts through concrete examples and just a little bit of theory. Throughout this book, the reader will be exposed to the entire machine learning process including feature engineering, resampling, hyperparameter tuning, model evaluation, and interpretation. The reader will be exposed to powerful algorithms such as regularized regression, random forests, gradient boosting machines, deep learning, generalized low rank models, and more! By favoring a hands-on approach and using real word data, the reader will gain an intuitive understanding of the architectures and engines that drive these algorithms and packages, understand when and how to tune the various hyperparameters, and be able to interpret model results. By the end of this book, the reader should have a firm grasp of R’s machine learning stack and be able to implement a systematic approach for producing high quality modeling results. Features: · Offers a practical and applied introduction to the most popular machine learning methods. · Topics covered include feature engineering, resampling, deep learning and more. · Uses a hands-on approach and real world data.
Download or read book Regulating with RNA in Bacteria and Archaea written by Gisela Storz and published by John Wiley & Sons. This book was released on 2018-11-01 with total page 1065 pages. Available in PDF, EPUB and Kindle. Book excerpt: Revealing the many roles of RNA in regulating gene expression For decades after the discoveries of messenger RNA, transfer RNA, and ribosomal RNA, it was largely assumed that the role of RNA in the cell was limited to shuttling the genomic message, chaperoning amino acids, and toiling in the ribosomes. Eventually, hints that RNA molecules might have regulatory roles began to appear. With the advent of genomics and bioinformatics, it became evident that numerous other RNA forms exist and have specific functions, including small RNAs (sRNA), RNA thermometers, and riboswitches to regulate core metabolic pathways, bacterial pathogenesis, iron homeostasis, quorum sensing, and biofilm formation. All of these functions, and more, are presented in Regulating with RNA in Bacteria and Archaea, written by RNA biologists from around the globe. Divided into eight sections-RNases and Helicases, Cis-Acting RNAs, Cis Encoded Base Pairing RNAs, Trans-Encoded Base Pairing RNAs, Protein Titration and Scaffolding, General Considerations, Emerging Topics, and Resources-this book serves as an excellent resource for established RNA biologists and for the many scientists who are studying regulated cellular systems. It is no longer a fair assumption that gene expression regulation is the provenance of proteins only or that control is exerted primarily at the level of transcription. This book makes clear that regulatory RNAs are key partners along with proteins in controlling the complex interactions and pathways found within prokaryotes.
Download or read book Metagenomics and Its Applications in Agriculture Biomedicine and Environmental Studies written by Robert W. Li and published by Nova Science Publishers. This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metagenomics is the study of microbial communities sampled directly from their natural environment, without prior culturing. DNA sequencing (or alternatively, an assay of functional properties) is applied to the culture-independent analyses of complex and diverse ("meta") populations of microbes. The rapid growth of metagenomics entails an expanded focus on microbes in a wide range of basic and applied research fields, ranging from microbiology to agriculture, biomedicine to bioenergy, and from veterinary to clinical medicine. This book is an insightful and inclusive study on metagenomics and its applications.
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 Pathogenic Neisseria written by John K. Davies (Microbiologist) and published by Caister Academic Press Limited. This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The human pathogens Neisseria meningitidis and Neisseria gonorrhoeae are exquisitely adapted to life within the human mucosa, their only natural niche. N. meningitidis is the causative agent of rapidly transmissible meningitis and septic shock. Vaccines developed to control this pathogen can be rendered ineffective by the pathogen's ability to undergo antigenic variation. In contrast, there are no current vaccination prospects for N. gonorrhoeae, the causative agent of sexually transmitted gonorrhoea. Historically, infections caused by N. gonorrhoeae were treated with antibiotics. However, the recent advent of new strains with resistance to all known antibiotics is causing such treatment regimes to fail, necessitating the need for new and more effective control strategies. In this book, leading Neisseria authorities review the most important research on pathogenic Neisseria to provide a timely overview of the field. The topics covered include: the link between pathogenesis and important metabolic pathways * vaccine development * antibiotic resistance * transcriptomics of regulatory networks * regulatory small RNAs * interactions with neutrophils * advances in humanized mouse models. An essential guide for research scientists, advanced students, clinicians, and other professionals working with Neisseria, the book is a recommended text for all microbiology libraries.
