Download or read book Rationale for the Evolutionary Retention of Two Unrelated Lysyl tRNA Synthetases written by Sandro Fernandes Ataide and published by . This book was released on 2006 with total page 183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Lysine insertion during coded protein synthesis requires lysyl-tRNALys, which is synthesized by lysyl-tRNA synthetase (LysRS). Two unrelated forms of LysRS are known: LysRS2, which is found in eukaryotes, most bacteria and a few archaea, and LysRS1, which is found in most archaea and a few bacteria. A detailed comparison of the amino acid recognition strategies of LysRS1 (Borrelia burgdorferi) and LysRS2 (Escherichia coli) was undertaken by studying the effects of lysine analogues on the aminoacylation reaction in vitro and in vivo. Also, based on comparisons of crystal structures and discrimination of lysine analogues by both LysRSs, the roles of the key residues in the active site of LysRS2 (lysS encoded) from E. coli were determined in vitro and in vivo. The differences in resistance to naturally occurring non-cognate amino acids suggest the distribution of LysRS1 and LysRS2 contributes to quality control during protein synthesis. LysRS1 and LysRS2 are not normally found together within one organism. In the pathogen Bacillus cereus both forms of LysRS are encoded; to investigate what role these two LysRSs might play in B. cereus, their RNA substrate specificities were investigated. It was found that in B. cereus the two different LysRSs together aminoacylate a small RNA of unknown function named tRNAOther. Aminoacylation of tRNAOther was found to be confined to stationary phase, suggesting a role for this non-canonical tRNA in growth phase-specific protein synthesis. Analysis of the non-canonical Watson-Crick base pairs and a bulge in the predicted secondary structure of tRNAOther indicate the importance of these identity elements in recognition by the LysRS1:LysRS2 complex. The role of tRNAOther in B. cereus was also investigated by the construction of a deletion strain, indicating that tRNAOther is not an essential gene. The results implicate tRNAOther in multiple regulatory functions that remain, as yet, uncharacterized.

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2007 with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Aminoacyl tRNA Synthetases written by Michael Ibba and published by CRC Press. This book was released on 2005-04-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: By virtue of their role as catalysts of the aminoacylation reaction, the aminoacyl-tRNA synthetases ensure that the first step of translation is performed quickly and accurately. In this volume of 36 separate chapters, the many facets of this ancient and ubiquitous family are reviewed, including their surprising structural diversity, enzymology, tRNA interaction properties, and curious alternative functions. These chapters illustrate the degree to which the aminoacyl-tRNA synthetases employ a variety of mechanisms to carry out both the standard functions related to the synthesis of aminoacylated tRNA for protein synthesis, as well as the surprising functions associated with amino acid biosynthesis, cytokine function, and even the processivity of DNA replication. Other chapters explore the regulation of their synthesis, their role in disease, and their prospects as targets for antibacterial therapeutics. This monograph will be a valuable resource for all scientists interested in the fundamentals of protein synthesis from both a basic research and clinical perspective, as well as the relation of translational components to the evolution of the genetic code.

Download or read book Evolution of the Genetic Code written by Shōzō Ōsawa and published by . This book was released on 1995 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: The genetic code was deciphered experimentally around 1966 and for a number of years scientists considered it to be "universal" for all forms of life. In 1981 researchers shocked the scientific community with the discovery that the code differed in mitochondria and certain other organisms, evidence that the genetic code was still evolving. This book discusses the distribution and origin of the non-universal codes and examines the possible mechanisms of code changes, making it essential reading for all those interested in evolutionary genetics.

Download or read book Biology of Aminoacyl tRNA Synthetases written by and published by Academic Press. This book was released on 2020-10-23 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biology of Aminoacyl-tRNA Synthetases, Volume 48 in The Enzymes series, highlights new advances in the field, with this new volume presenting interesting chapters on A narrative about our work on the endless frontier of editing, The puzzling evolution of aminoacyl-tRNA synthetases, Structural basis of the tRNA recognition by aminoacyl-tRNA synthetases, Catalytic strategies of aminoacyl-tRNA synthetases, Trans-editing by aminoacyl-tRNA synthetase-like editing domains, Adaptive and maladaptive mistranslation arising from aminoacyl-tRNA synthetases, Non-canonical inputs and outputs of tRNA aminoacylation, Structure and function of multi-tRNA synthetase complexes, Mitochondrial aminoacyl-tRNA synthetases, Non-canonical functions of human cytoplasmic tyrosyl-, tryptophanyl- and other aminoacyl-tRNA synthetases, and much more. - Provides the authority and expertise of leading contributors from an international board of authors - Presents the latest release in The Enzymes series

Download or read book Molecular Evolution and Protobiology written by Koichiro Matsuno and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, an ever-increasing amount of research has been conducted on the physico-chemical basis of the origin and evolution of life, or protobiology. Many questions are raised in this endeavor: What research methodology should be employed? What sort of dependable facts are available as a firm frame of reference upon which the physico-chemical origin of life or protolife could be examined? Is the origin due exclusively to chance events? If not, what is then responsible for the origin? What physical reality underlies the evolutionarily selective process leading to the origin? What role does variation assume and how is it generated in the course of evolution? Many research workers have pursued various avenues toward answering the stated questions. Among them, we believe Sidney W. Fox has been playing a very unique and pivotal role over the past quarter of a century, presiding over 240 man-years or more of labo ratory work. His laboratory syntheses of thermal proteins called proteinoids and proteinoid micro spheres have emphasized the prin ciple of the self-sequencing of amino acids as a key concept of protobiological synthesis. The significance of his contribution is seen in presenting the experimental evidence that the origin of life is largely due to nonrandom events. This discovery marks a new epoch in the conceptual development of studying the origin of life by focusing on the molecular processes that underlied the emergence and evolution of protobiological information.

Download or read book Engineering the Genetic Code written by Nediljko Budisa and published by John Wiley & Sons. This book was released on 2006-05-12 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ability to introduce non-canonical amino acids in vivo has greatly expanded the repertoire of accessible proteins for basic research and biotechnological application. Here, the different methods and strategies to incorporate new or modified amino acids are explained in detail, including a lot of practical advice for first-time users of this powerful technique. Novel applications in protein biochemistry, genomics, biotechnology and biomedicine made possible by the expansion of the genetic code are discussed and numerous examples are given. Essential reading for all molecular life scientists who want to stay ahead in their research.

Download or read book The Logic of Chance written by Eugene V. Koonin and published by FT Press. This book was released on 2011-06-23 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Logic of Chance offers a reappraisal and a new synthesis of theories, concepts, and hypotheses on the key aspects of the evolution of life on earth in light of comparative genomics and systems biology. The author presents many specific examples from systems and comparative genomic analysis to begin to build a new, much more detailed, complex, and realistic picture of evolution. The book examines a broad range of topics in evolutionary biology including the inadequacy of natural selection and adaptation as the only or even the main mode of evolution; the key role of horizontal gene transfer in evolution and the consequent overhaul of the Tree of Life concept; the central, underappreciated evolutionary importance of viruses; the origin of eukaryotes as a result of endosymbiosis; the concomitant origin of cells and viruses on the primordial earth; universal dependences between genomic and molecular-phenomic variables; and the evolving landscape of constraints that shape the evolution of genomes and molecular phenomes. "Koonin's account of viral and pre-eukaryotic evolution is undoubtedly up-to-date. His "mega views" of evolution (given what was said above) and his cosmological musings, on the other hand, are interesting reading." Summing Up: Recommended Reprinted with permission from CHOICE, copyright by the American Library Association.

Download or read book Progressive Brain Disorders in Childhood written by Juan M. Pascual and published by Cambridge University Press. This book was released on 2017-04-20 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of childhood neurodegenerative and other progressive but non-degenerative disorders to guide their diagnosis and management.

Download or read book Biomaterials written by David Byrom and published by Springer. This book was released on 1991-06-18 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomaterials are produced from biological material and are used for their physical characteristics. This book looks at the range of biomaterials and their applications which range from the use of polysaccharides as thickening agents to the use of proteins as fibres and adhesives.

Download or read book Sequence Evolution Function written by Eugene V. Koonin and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sequence - Evolution - Function is an introduction to the computational approaches that play a critical role in the emerging new branch of biology known as functional genomics. The book provides the reader with an understanding of the principles and approaches of functional genomics and of the potential and limitations of computational and experimental approaches to genome analysis. Sequence - Evolution - Function should help bridge the "digital divide" between biologists and computer scientists, allowing biologists to better grasp the peculiarities of the emerging field of Genome Biology and to learn how to benefit from the enormous amount of sequence data available in the public databases. The book is non-technical with respect to the computer methods for genome analysis and discusses these methods from the user's viewpoint, without addressing mathematical and algorithmic details. Prior practical familiarity with the basic methods for sequence analysis is a major advantage, but a reader without such experience will be able to use the book as an introduction to these methods. This book is perfect for introductory level courses in computational methods for comparative and functional genomics.

Download or read book Genome Mapping and Genomics in Animal Associated Microbes written by Vishvanath Nene and published by Springer Science & Business Media. This book was released on 2008-11-24 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: Achievements and progress in genome mapping and the genomics of microbes supersede by far those for higher plants and animals, in part due to their enormous economic implication but also smaller genome size. In the post-genomic era, whole genome sequences of animal-associated microbes are providing clues to depicting the genetic basis of the complex host-pathogen relationships and the evolution of parasitism; and to improving methods of controlling pathogens. This volume focuses on a globally important group of intracellular prokaryotic pathogens which affect livestock animals. These include Brucella, Mycobacterium, Anaplasma and Ehrlichia, as well as the protozoan pathogens Cryptosporidium and Theileria, for which genome sequence data is available. Insights from comparative genomics of the microbes described provide clues to the adaptation involved in host-microbe interactions, as well as resources potentially useful for application in future research and product development.

Download or read book Protein Sequence Determination written by Saul B. Needleman and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: "All the King's horses and all the King's mm couldn't put Humpty Dumpty together again." It is entirely possible that the difficulty facing "all the King's men" was principally the lack of a sufficient guide to the techniques of reassembling from a series of small components, the original entity. It is the sincere hope of the editor of the present work and of each of the contributing authors that the modern researcher will not face a similar predicament in his endeavours to reconstruct the complete primary sequence of a protein from the array of component amino acids. Rather, it is the intent that, with this volume, he may proceed untimorously if not with outright confidence toward achieving his purpose. To the newcomer in protein sequencing, compelled by necessity, or fascination, to investigate the exact order of amino acids in proteins, the question of "where to begin" - or "how to do it" is urgent. To those more skilled, a ready source of additional techniques should nevertheless be of value. This volume attempts to present in a single source a discussion of the methods and techniques useful to the determination of the primary structures of proteins and peptides. Hopefully, this book will tell the reader "how to do it".

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 Tietz Clinical Guide to Laboratory Tests E Book written by Alan H. B. Wu and published by Elsevier Health Sciences. This book was released on 2006-06-08 with total page 1857 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition of Norbert Tietz's classic handbook presents information on common tests as well as rare and highly specialized tests and procedures - including a summary of the utility and merit of each test. Biological variables that may affect test results are discussed, and a focus is placed on reference ranges, diagnostic information, clinical interpretation of laboratory data, interferences, and specimen types. New and updated content has been added in all areas, with over 100 new tests added. - Tests are divided into 8 main sections and arranged alphabetically. - Each test includes necessary information such as test name (or disorder) and method, specimens and special requirements, reference ranges, chemical interferences and in vivo effects, kinetic values, diagnostic information, factors influencing drug disposition, and clinical comments and remarks. - The most current and relevant tests are included; outdated tests have been eliminated. - Test index (with extensive cross references) and disease index provide the reader with an easy way to find necessary information - Four new sections in key areas (Preanalytical, Flow Cytometry, Pharmacogenomics, and Allergy) make this edition current and useful. - New editor Alan Wu, who specializes in Clinical Chemistry and Toxicology, brings a wealth of experience and expertise to this edition. - The Molecular Diagnostics section has been greatly expanded due to the increased prevalence of new molecular techniques being used in laboratories. - References are now found after each test, rather than at the end of each section, for easier access.

Download or read book How to Win the Nobel Prize written by J. Michael BISHOP and published by Harvard University Press. This book was released on 2009-06-30 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1989 Michael Bishop and Harold Varmus were awarded the Nobel Prize for their discovery that normal genes under certain conditions can cause cancer. In this book, Bishop tells us how he and Varmus made their momentous discovery. More than a lively account of the making of a brilliant scientist, How to Win the Nobel Prize is also a broader narrative combining two major and intertwined strands of medical history: the long and ongoing struggles to control infectious diseases and to find and attack the causes of cancer. Alongside his own story, that of a youthful humanist evolving into an ambivalent medical student, an accidental microbiologist, and finally a world-class researcher, Bishop gives us a fast-paced and engrossing tale of the microbe hunters. It is a narrative enlivened by vivid anecdotes about our deadliest microbial enemies--the Black Death, cholera, syphilis, tuberculosis, malaria, smallpox, HIV--and by biographical sketches of the scientists who led the fight against these scourges. Bishop then provides an introduction for nonscientists to the molecular underpinnings of cancer and concludes with an analysis of many of today's most important science-related controversies--ranging from stem cell research to the attack on evolution to scientific misconduct. How to Win the Nobel Prize affords us the pleasure of hearing about science from a brilliant practitioner who is a humanist at heart. Bishop's perspective will be valued by anyone interested in biomedical research and in the past, present, and future of the battle against cancer. Table of Contents: List of Illustrations Preface 1. The Phone Call 2. Accidental Scientist 3. People and Pestilence 4. Opening the Black Box of Cancer 5. Paradoxical Strife Notes Credits Index Reviews of this book: Despite his book's encouraging title, Bishop--who won a Nobel Prize in Physiology and Medicine in 1989--cautions that "I have not written an instruction manual for pursuit of the prize." Instead, he has written an amiable reflection on the experience of being a Nobelist, intertwined with some history and anecdotes about the award, and balanced by a wide-ranging review of his own career as an "accidental scientist"...Along the way, Bishop reflects on the history of our knowledge of microbes, cancer, the politics of funding research and present-day disenchantment with science. His main purpose in writing this book, Bishop says, is to show that "scientists are supremely human"--which he does with grace and charm. --Publishers Weekly Reviews of this book: How to Win the Nobel Prize is typical Bishop: modest, funny, insightful and offering an extremely clear and brief explanation of the basic scientific achievement that won the 1989 Nobel Prize in physiology or medicine for himself and longtime colleague, Harold Varmus, now president of the Memorial Sloan-Kettering Cancer Center. --David Perlman, San Francisco Chronicle Reviews of this book: In these pages Bishop reveals himself as a good writer blessed with enviable clarity, someone sensible and levelheaded who likes people and is enamored of his science. --John Tyler Bonner, New York Times Book Review Reviews of this book: This is a treasure...Above all, How to Win the Nobel Prize is a civilised book and a lavishly rewarding one. --Roy Herbert, New Scientist Reviews of this book: At its heart this analysis of science and the scientific world is a jewel. How to Win the Nobel Prize is an inspirational book, full of careful analysis and judgement. --John Oxford, Times Higher Education Supplement Reviews of this book: Bishop is a gifted communicator and teacher, and he sets about his task of educating scientists and the public by describing his career in science and science politics...In the end, Bishop's book provides a road map for scientists and the public to build a robust scientific community that serves our society well. --Andreas Trumpp and Daniel Kalman, Nature Cell Biology J. Michael Bishop has written his book 'to show that scientists are supremely human.' The book is also a lucid explanation of how science has been harnessed to fight the human afflictions of cancer and infectious disease. And the story ends with a wide-ranging overview of today's challenges to the scientific enterprise. Overall, a must-read for all those interested in science and scientists--even those with absolutely no interest in winning a Nobel Prize! --Bruce Alberts, President, National Academy of Sciences J. Michael Bishop is that rare scientist who is widely read in literature and poetry. Most importantly, he remembers what he reads and thinks deeply about it, as well as about all else in his rich life. The Nobel Prize he won and richly deserved, his political activism, his understanding of cancer and microbiology, his devotion to the practice of science--all these provide fodder for his writerly craft. Quite a wonderful book! --David Baltimore, Nobel Laureate and President, California Institute of Technology

Download or read book Biochemistry written by David E. Metzler and published by Elsevier. This book was released on 2003-05-04 with total page 1063 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biochemistry: The Chemical Reactions of Living Cells is a well-integrated, up-to-date reference for basic chemistry and underlying biological phenomena. Biochemistry is a comprehensive account of the chemical basis of life, describing the amazingly complex structures of the compounds that make up cells, the forces that hold them together, and the chemical reactions that allow for recognition, signaling, and movement. This book contains information on the human body, its genome, and the action of muscles, eyes, and the brain.* Thousands of literature references provide introduction to current research as well as historical background* Contains twice the number of chapters of the first edition* Each chapter contains boxes of information on topics of general interest