Download or read book A Multi scale Examination of Protein Surface Layer Assembly and Function in Bacteria and Archaea written by Jonathan Robert Herrmann and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Surface layers (S-layers) are nanoporous shells of crystalline protein surrounding a great diversity of bacteria and nearly all known archaea. As the outermost component of the cell envelope, S-layers are one of the most abundant biopolymers on earth and are implicated in functions ranging from providing the structural integrity of the cell to mediating host-pathogen interactions. In this thesis, I report a multi-scale analysis of S-layers from the model bacterium Caulobacter crescentus and a more recently cultivated thaumarchaeote, Nitrosoarchaeum limnia. By first biophysically characterizing the S-layer protein (SLP) from C. crescentus, RsaA, I discovered that environmental calcium mediates multiple physical states of the S-layer. I leveraged this knowledge to reconstitute and specifically image S-layer assembly in living cells. Super-resolution fluorescence microscopy and single-molecule tracking demonstrated that remarkably fast and efficient continuous 2D protein crystallization governs S-layer self-assembly. I further examined the rapid 2D crystallization of RsaA using a combination of time-resolved small angle x-ray scattering (SAXS) and electron cryo-microscopy (Cryo-EM). These observations revealed that a multi-step crystallization pathway involving a short-lived crystalline intermediate is responsible for rapid self-assembly of RsaA. Robust S-layer lattice formation has implications for essential cell functions such as energy production, which in the ammonia-oxidizing archaeaon N. limnia likely occurs within the pseudo-periplasmic space between the cell's only lipid membrane and the extracellular S-layer. Electrodiffusion simulations of the N. limnia cell envelope suggest that the S-layer facilitates diffusion of its main energy source, ammonium ions, through the nanopores of the S-layer by creating a charged protein surface. As such, we propose ion transport as an evolutionary basis for conservation of charged amino acids among archaeal SLPs. Taken together, these findings inform the development of antibiotics mediating S-layer biology and provide insight into possible avenues to design biologically inspired self-assembling macromolecular nanomaterials.
Download or read book Essentials of Glycobiology written by Ajit Varki and published by CSHL Press. This book was released on 1999 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sugar chains (glycans) are often attached to proteins and lipids and have multiple roles in the organization and function of all organisms. "Essentials of Glycobiology" describes their biogenesis and function and offers a useful gateway to the understanding of glycans.
Download or read book Crystalline Bacterial Cell Surface Layers written by Uwe B. Sleytr and published by Springer. This book was released on 2011-12-16 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crystalline surface layers (S-layers) represent an almost universal feature of archaebacterial cell envelopes and can be found in gram-positive and gram-negative eubacterial species from nearly all phylogenetic branches. S-layers consist of a single protein- or glycoprotein species and thus can be considered as one of the most primitive membrane structures developed during evolution. Prokaryotes carrying S-layers are ubiquitously found in every part of the biosphere. This supports the concept of a general supramolecular "porous crystalline surface layer" fulfilling a broad spectrum of functions which are strongly dependent on the particular environmental and ecological conditions. Their structural simplicity makes S-layers a suitable model for analyzing structure-function relationships as well as dynamic aspects of membrane morphogenesis.
Download or read book Biomolecular Crystallography written by Bernhard Rupp and published by Garland Science. This book was released on 2009-10-20 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthesizing over thirty years of advances into a comprehensive textbook, Biomolecular Crystallography describes the fundamentals, practices, and applications of protein crystallography. Illustrated in full-color by the author, the text describes mathematical and physical concepts in accessible and accurate language. Biomolecular Crystallography will be a valuable resource for advanced undergraduate and graduate students and practitioners in structural biology, crystallography, and structural bioinformatics.
Download or read book Molecular Biology of The Cell written by Bruce Alberts and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crystalline Bacterial Cell Surface Proteins written by Uwe B. Sleytr and published by Elsevier. This book was released on 1996-04-18 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crystalline Bacterial Cell Surface Proteins assembles information on the understanding of the occurrence, structure, chemistry, genetics, assembly, function, and application potential of S-layers. The chapters are designed to stand independent of each other and provide a complete survey of the different topics in S-layer research. This book is intended to stimulate further development in basic and applied S-layer research. Assembles present-day understanding of S-layers Provides a detailed survey of the entire field of basic and applied S-layer research Potential for broad application in biotechnology, vaccine development, diagnostics, molecular nanotechnology, and biomimetics
Download or read book Bacterial Cell Wall written by J.-M. Ghuysen and published by Elsevier. This book was released on 1994-02-09 with total page 607 pages. Available in PDF, EPUB and Kindle. Book excerpt: Studies of the bacterial cell wall emerged as a new field of research in the early 1950s, and has flourished in a multitude of directions. This excellent book provides an integrated collection of contributions forming a fundamental reference for researchers and of general use to teachers, advanced students in the life sciences, and all scientists in bacterial cell wall research. Chapters include topics such as: Peptidoglycan, an essential constituent of bacterial endospores; Teichoic and teichuronic acids, lipoteichoic acids, lipoglycans, neural complex polysaccharides and several specialized proteins are frequently unique wall-associated components of Gram-positive bacteria; Bacterial cells evolving signal transduction pathways; Underlying mechanisms of bacterial resistance to antibiotics.
Download or read book Prokaryotic Cytoskeletons written by Jan Löwe and published by Springer. This book was released on 2017-05-11 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the structures and functions of active protein filaments, found in bacteria and archaea, and now known to perform crucial roles in cell division and intra-cellular motility, as well as being essential for controlling cell shape and growth. These roles are possible because the cytoskeletal and cytomotive filaments provide long range order from small subunits. Studies of these filaments are therefore of central importance to understanding prokaryotic cell biology. The wide variation in subunit and polymer structure and its relationship with the range of functions also provide important insights into cell evolution, including the emergence of eukaryotic cells. Individual chapters, written by leading researchers, review the great advances made in the past 20-25 years, and still ongoing, to discover the architectures, dynamics and roles of filaments found in relevant model organisms. Others describe one of the families of dynamic filaments found in many species. The most common types of filament are deeply related to eukaryotic cytoskeletal proteins, notably actin and tubulin that polymerise and depolymerise under the control of nucleotide hydrolysis. Related systems are found to perform a variety of roles, depending on the organisms. Surprisingly, prokaryotes all lack the molecular motors associated with eukaryotic F-actin and microtubules. Archaea, but not bacteria, also have active filaments related to the eukaryotic ESCRT system. Non-dynamic fibres, including intermediate filament-like structures, are known to occur in some bacteria.. Details of known filament structures are discussed and related to what has been established about their molecular mechanisms, including current controversies. The final chapter covers the use of some of these dynamic filaments in Systems Biology research. The level of information in all chapters is suitable both for active researchers and for advanced students in courses involving bacterial or archaeal physiology, molecular microbiology, structural cell biology, molecular motility or evolution. Chapter 3 of this book is open access under a CC BY 4.0 license.
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 Cilia and Flagella written by and published by Academic Press. This book was released on 1995-08-31 with total page 643 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cilia and Flagella presents protocols accessible to all individuals working with eukaryotic cilia and flagella. These recipes delineate laboratory methods and reagents, as well as critical steps and pitfalls of the procedures. The volume covers the roles of cilia and flagella in cell assembly and motility, the cell cycle, cell-cell recognition and other sensory functions, as well as human diseases and disorders. Students, researchers, professors, and clinicians should find the book's combination of "classic" and innovative techniques essential to the study of cilia and flagella. Key Features* A complete guide containing more than 80 concise technical chapters friendly to both the novice and experienced researcher* Covers protocols for cilia and flagella across systems and species from Chlamydomonas and Euglena to mammals* Both classic and state-of-the-art methods readily adaptable across model systems, and designed to last the test of time, including microscopy, electrophoresis, and PCR* Relevant to clinicians interested in respiratory disease, male infertility, and other syndromes, who need to learn biochemical, molecular, and genetic approaches to studying cilia, flagella, and related structures
Download or read book Nanomicrobiology written by Larry L. Barton and published by Springer. This book was released on 2014-11-05 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is devoted to nanomicrobiology and the nanosystems of bacteria. The initial chapter discusses some of the controversies in the geochemical and biomedical fields associated with the reports of nanobacteria in the environment. Current knowledge of several internal and surface structures of bacteria is addressed in this book. Included are chapters discussing carboxysomes, S-layers, gliding motility of bacteria, and aggregation of iron to produce nano-magnetite. Information about the activities of outer membrane vesicles produced by Gram-negative bacteria is discussed as a benefit to bacteria that produce it and some potential industrial applications are presented. A broad review of bacterial-mineral interactions is addressed in a chapter of metallic nanoparticles and colloids production by bacterial reduction of soluble redox active elements. The structures of bacterial nanowires are discussed and their application in extra-cellular electron transport is reviewed. Nanomotor activities of bacteria are discussed as pertains to the mechanics of flagellar rotation, production of energy by ATP synthase, DNA packing, and translocation of proteins across membranes by secretion systems. The rapidly evolving field of nanosystem technology is embracing many areas, and it is the hope that this book will stimulate the use of bacterial nanostructures for future developments in nanotechnology.
Download or read book Regulated Proteolysis in Microorganisms written by David A. Dougan and published by Springer Science & Business Media. This book was released on 2013-03-12 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains an extensive collection of critical reviews, from leading researchers in the field of regulated protein degradation. It covers the role of regulated proteolysis in a range of microorganisms (from Gram positive, Gram negative and pathogenic bacteria to Archaea and the Baker’s yeast Saccharomyces cerevisiae).
Download or read book The Social Biology of Microbial Communities written by Institute of Medicine and published by National Academies Press. This book was released on 2013-01-10 with total page 633 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning with the germ theory of disease in the 19th century and extending through most of the 20th century, microbes were believed to live their lives as solitary, unicellular, disease-causing organisms . This perception stemmed from the focus of most investigators on organisms that could be grown in the laboratory as cellular monocultures, often dispersed in liquid, and under ambient conditions of temperature, lighting, and humidity. Most such inquiries were designed to identify microbial pathogens by satisfying Koch's postulates.3 This pathogen-centric approach to the study of microorganisms produced a metaphorical "war" against these microbial invaders waged with antibiotic therapies, while simultaneously obscuring the dynamic relationships that exist among and between host organisms and their associated microorganisms-only a tiny fraction of which act as pathogens. Despite their obvious importance, very little is actually known about the processes and factors that influence the assembly, function, and stability of microbial communities. Gaining this knowledge will require a seismic shift away from the study of individual microbes in isolation to inquiries into the nature of diverse and often complex microbial communities, the forces that shape them, and their relationships with other communities and organisms, including their multicellular hosts. On March 6 and 7, 2012, the Institute of Medicine's (IOM's) Forum on Microbial Threats hosted a public workshop to explore the emerging science of the "social biology" of microbial communities. Workshop presentations and discussions embraced a wide spectrum of topics, experimental systems, and theoretical perspectives representative of the current, multifaceted exploration of the microbial frontier. Participants discussed ecological, evolutionary, and genetic factors contributing to the assembly, function, and stability of microbial communities; how microbial communities adapt and respond to environmental stimuli; theoretical and experimental approaches to advance this nascent field; and potential applications of knowledge gained from the study of microbial communities for the improvement of human, animal, plant, and ecosystem health and toward a deeper understanding of microbial diversity and evolution. The Social Biology of Microbial Communities: Workshop Summary further explains the happenings of the workshop.
Download or read book Prokaryotology written by Sorin Sonea and published by PUM. This book was released on 2000 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prokaryotes are profoundly original, highly efficient microorganisms that have played a decisive role in the evolution of life on Earth. Although disjunct, taken together their cells form one global superorganism or biological system. One of the results of their non-Darwinian evolution has been the development of enormous diversity and bio-energetic variety. Prokaryotic cells possess standardized mechanisms for easy gene exchanges (lateral gene transfer) and they can behave like receiving and broadcasting stations for genetic material. Ultimately, the result is a global communication system based on the prokaryotic hereditary patrimony, by analogy, a two-billion-year-old world wide web for their benefit. Eukaryotes have evolved from the association of at least three complementary prokaryotic cells, and their subsequent development has been enriched and accelerated by symbioses with other prokaryotes. One of these symbioses was responsible for the origin of vascular plants which transformed vast sections of the continental surface of the Earth from deserts to areas with luxuriant, life-supporting vegetation. All forms of life on our planet are directly or indirectly sustained and enriched by the positive contribution of prokaryotes. Sorin Sonea and L�o G. Mathieu have been professors at the Department of Microbiology and Immunology (Faculty of Medicine) at the Universit� de Montr�al. They have long been advocates of the ideas presented in this book.
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 The Surfaceome written by Kenneth R. Boheler and published by Humana Press. This book was released on 2017-12-20 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides readers with the latest techniques and tools to assess modifications and functions of the surfaceome. The chapters in this book are divided into 4 sections: discovery-based approaches to surfaceome content; targeted approaches for surfaceome content; cell-based function analyses related to surfaceome content; and computational approaches in surfaceome studies. Section 1 focuses on discovery-based approaches for cataloging surfaceome content that analyses the surfaceome of bacteria, avian embryos, and mammalian systems. Section 2 discusses methods that over-express specific targets in Sf9 cells and generate bi-specific antibodies for targeting cancer and somatic cells. Section 3 explores voltage dependent sodium channels and high-content electrophysiological analyses. The final section looks at the new web-based platform known as targets-search. Written in the highly successful Methods in Molecular Biology series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Comprehensive and thorough, Surfaceome: Methods and Protocols assists in the study of cell surface protein biology and function. It is a valuable resource for all researchers interested in this field.
Download or read book World Ocean Assessment written by Alan Simcock and published by Cambridge University Press. This book was released on 2017-04-17 with total page 978 pages. Available in PDF, EPUB and Kindle. Book excerpt: This United Nations report examines the current state of knowledge of the world's oceans, for policymakers, and provides a reference for marine science courses.
