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Control Of Gene Expression By Cell Size
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Book Synopsis Control of Gene Expression by Cell Size by : Chia-Yung Wu
Download or read book Control of Gene Expression by Cell Size written by Chia-Yung Wu and published by . This book was released on 2010 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polyploidy, increased copy number of whole chromosome sets in the genome, is a common cellular state in evolution, development and disease. Polyploidy enlarges cell size and alters gene expression, producing novel phenotypes and functions. Although many polyploid cell types have been discovered, it is not clear how polyploidy changes physiology. Specifically, whether the enlarged cell size of polyploids causes differential gene regulation has not been investigated. In this thesis, I present the evidence for a size-sensing mechanism that alters gene expression in yeast. My results indicate a causal relationship between cell size and gene expression. Ploidy-associated changes in the transcriptome therefore reflect transcriptional adjustment to a larger cell size. The causal and regulatory connection between cell size and transcription suggests that the physical features of a cell (such as size and shape) are a systematic factor in gene regulation. In addition, cell size homeostasis may have a critical function - maintenance of transcriptional homeostasis.
Book Synopsis Molecular Biology of The Cell by : Bruce Alberts
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:
Book Synopsis Regulation of Cell Size and the Size Dependence of Gene Expression by : Devon Chandler-Brown
Download or read book Regulation of Cell Size and the Size Dependence of Gene Expression written by Devon Chandler-Brown and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume is a fundamental morphological feature of cells, influencing a wide variety of cellular processes. Because it is coupled to so many processes, cells employ regulatory mechanisms to ensure cells exhibit a limited range of sizes. Recent work in budding yeast has shown that a key cell cycle regulator, the G1/S transcriptional inhibitor Whi5, is synthesized independent of cell size. The dilution of Whi5 in larger cells links cell size to G1/S cell cycle progression. However, it has also been shown that growth over the full cell cycle does not depend on cell size at birth, termed an "adder". It has been proposed that this observation suggests that cell size is controlled over the course of the full cell cycle, leading to an apparent contradiction. Here we show that cell size control occurs independently in different parts of the cell cycle and does not reflect a molecular mechanism measuring growth during the full cell cycle. Consistent with previous results, we find that cell size sets the rate of entry into the cell cycle during the pre-Start period. We also identify the key parameters predicting the rate of entry into cytokinesis at the end of the post-Start period. We use these parameters to build a phenomenological cell cycle model that recapitulates observations of growth and size distributions for cells without explicit coupling between cell cycle phases. Our model predicts that changes to the rate of progression through either phase of the cell cycle should disrupt the adder behavior and we show that mutants in genes controlling G1/S size control breaks the adder. The rate of passage through Start depends on volume, which is thought to depend on the size-independent expression of Whi5. This type of gene expression scaling is unusual because although cells of a given type may span a range of sizes, most proteins and RNA are maintained at constant, size independent, concentrations, rather than amounts. This ensures that biochemical reactions proceed independently of cell size. The identification of WHI5, whose gene product differs from this pattern, raises two fundamental questions: (1) Are there additional genes whose synthesis is decoupled from cell volume? (2) If most gene expression is proportional to cell size, what molecular mechanism promotes cell-size-independent gene expression? To address these questions, we analyzed flow cytometry data collected using the yeast GFP-fusion library. We identified approximately 200 genes whose expression is not proportional to cell volume. Gene ontology analysis revealed that non-scaling genes are enriched for genes with roles in DNA-templated processes and membrane transport. This suggests that cells employ differential protein synthesis to coordinate protein requirements with the scaling properties of cellular structures. Membranes are expected to scale as size2/3 and DNA content is independent of size. To understand the mechanisms that underlie size-independent gene expression, we used transcriptional reporters of non-scaling genes, including WHI5, and determined that cell-size-independent regulation of some genes is due to non-scaling transcription rates. Targeted analysis of the WHI5 promoter showed that the region between 1000 bases and 550 bases upstream of the translation start site are required for cell-size-independent gene expression. This suggests there is a molecular element within this region required for non-scaling gene expression. Finally, we identify a partitioning mechanism ensuring proteins are partitioned in dividing cells in amounts that are independent of asymmetric sizes of the mother and daughter cells. Tight chromatin association ensures that proteins are segregated in equal amounts despite asymmetric division. Consistent with this model, while Whi5 is normally partitioned in equal amounts, a Whi5 protein that lacks the domain required for association with transcription factors is partitioned in proportion to the mother-daughter cell size ratio. Taken together, our work demonstrates a functional role for differential size-dependency of protein synthesis and gives insights into the underlying molecular mechanism(s).
Download or read book Cell Growth written by Michael N. Hall and published by CSHL Press. This book was released on 2004 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent breakthroughs in the field of cell growth, particularly in the control of cell size, are reviewed by experts in the three major divisions of the field: growth of individual cells, growth of organs, and regulation of cell growth in the contexts of development and cell division. This book is an introductory overview of the field and should be adaptable as a textbook.
Download or read book Gene Expression written by M. Karin and published by Springer Science & Business Media. This book was released on 2013-03-08 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first volume in a new series Progress in Gene Expres sion. The control of gene expression is a central-most topic in molecular biology as it deals with the utilization and regulation of gene informa tion. As we see huge efforts mounting all over the developed world to understand the structure and organization of several complex eukaryotic genomes in the form of Gene Projects and Genome Centers, we have to remember that without understanding the basic mechanisms that gov ern the use of genetic information, much of this effort will not be very productive. Fortunately, however, research during the past seven years on the mechanisms that control gene expression in eukaryotes has been extremely successful in generating a wealth of information on the basic strategies of transcriptional control. (Although regulation of gene ex pression is exerted at many different levels, much of the emphasis in this series will be on transcriptional control. A future volume, however, will deal with other levels of regulation). The progress in understanding the control of eukaryotic transcription can only be appreciated by realizing that seven years ago we did not know the primary structure of a single sequence specific transcriptional activator, and those whose primary structures were available (e. g. , homeo domain proteins) were not yet recognized to function in this capacity.
Book Synopsis Eukaryotic Gene Regulation by : Gerald M. Kolodny
Download or read book Eukaryotic Gene Regulation written by Gerald M. Kolodny and published by CRC Press. This book was released on 2018-01-18 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cause of cancer and its many manifestations is at present unknown. Since many of its manifestations, including is control of cell division, appear to represent abnormal patterns of gene expression, studies of the regulation of gene expression nwill provide important insights in the understanding and treatment of cancer. This volume attempts to present some of the recent work on regulation of gene expression in eukaryotic cells.
Book Synopsis Eukaryotic Gene Regulation by : Gerald M. Kolodny
Download or read book Eukaryotic Gene Regulation written by Gerald M. Kolodny and published by CRC Press. This book was released on 2018-01-18 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cause of cancer and its many manifestations is at present unknown. Since many of its manifestations, including is control of cell division, appear to represent abnormal patterns of gene expression, studies of the regulation of gene expression nwill provide important insights in the understanding and treatment of cancer. This volume attempts to present some of the recent work on regulation of gene expression in eukaryotic cells.
Book Synopsis The Hormonal Control of Gene Transcription by : P. Cohen
Download or read book The Hormonal Control of Gene Transcription written by P. Cohen and published by Elsevier. This book was released on 2012-12-02 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past few years there have been considerable advances in our understanding of cellular control mechanisms, and current research is now linking areas of biology that were previously thought of as being quite separate. Molecular Aspects of Cellular Regulation is a series of occasional books on multidisciplinary topics which illustrate general principles of cellular regulation. Previous volumes described Recently Discovered Systems of Enzyme Regulation by Reversible Phosphorylation (Volumes 1 and 3), The Molecular Actions of Toxins and Viruses (Volume 2), Molecular Mechanisms of Transmembrane Signalling (Volume 4) and Calmodulin (Volume 5). This sixth volume, The Hormonal Control of Gene Transcription, has now been published to highlight recent important advances in our understanding of this topic which is linking two of the most active areas of current biochemical and molecular biological research (hormone action and gene transcription) and leading to the emergence of unifying concepts.
Book Synopsis Post-Transcriptional Control of Gene Expression in Plants by : Witold Filipowicz
Download or read book Post-Transcriptional Control of Gene Expression in Plants written by Witold Filipowicz and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: A recent volume of this series (Signals and Signal Transduction Pathways in Plants (K. Palme, ed.) Plant Molecular Biology 26, 1237-1679) described the relay races by which signals are transported in plants from the sites of stimuli to the gene expression machinery of the cell. Part of this machinery, the transcription apparatus, has been well studied in the last two decades, and many important mechanisms controlling gene expression at the transcriptional level have been elucidated. However, control of gene expression is by no means complete once the RNA has been produced. Important regulatory devices determine the maturation and usage of mRNA and the fate of its translation product. Post-transcriptional regulation is especially important for generating a fast response to environmental and intracellular signals. This book summarizes recent progress in the area of post-transcriptional regulation of gene expression in plants. 18 chapters of the book address problems of RNA processing and stability, regulation of translation, protein folding and degradation, as well as intracellular and cell-to-cell transport of proteins and nucleic acids. Several chapters are devoted to the processes taking place in plant organelles.
Book Synopsis Regulation of Gene Expression by : Gary H. Perdew
Download or read book Regulation of Gene Expression written by Gary H. Perdew and published by Humana. This book was released on 2014-11-22 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of molecular biology and biochemistry to study the regulation of gene expression has become a major feature of research in the biological sciences. Many excellent books and reviews exist that examine the experimental methodology employed in specific areas of molecular biology and regulation of gene expression. However, we have noticed a lack of books, especially textbooks, that provide an overview of the rationale and general experimental approaches used to examine chemically or disease-mediated alterations in gene expression in mammalian systems. For example, it has been difficult to find appropriate texts that examine specific experimental goals, such as proving that an increased level of mRNA for a given gene is attributable to an increase in transcription rates. Regulation of Gene Expression: Molecular Mechanisms is intended to serve as either a textbook for graduate students or as a basic reference for laboratory personnel. Indeed, we are using this book to teach a graduate-level class at The Pennsylvania State University. For more details about this class, please visit http://moltox. cas. psu. edu and select “Courses. ” The goal for our work is to provide an overview of the various methods and approaches to characterize possible mechanisms of gene regulation. Further, we have attempted to provide a framework for students to develop an understanding of how to determine the various mechanisms that lead to altered activity of a specific protein within a cell.
Download or read book Gene Expression written by M. Karin and published by Birkhäuser. This book was released on 1993-12-01 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first volume in a new series Progress in Gene Expres sion. The control of gene expression is a central-most topic in molecular biology as it deals with the utilization and regulation of gene informa tion. As we see huge efforts mounting all over the developed world to understand the structure and organization of several complex eukaryotic genomes in the form of Gene Projects and Genome Centers, we have to remember that without understanding the basic mechanisms that gov ern the use of genetic information, much of this effort will not be very productive. Fortunately, however, research during the past seven years on the mechanisms that control gene expression in eukaryotes has been extremely successful in generating a wealth of information on the basic strategies of transcriptional control. (Although regulation of gene ex pression is exerted at many different levels, much of the emphasis in this series will be on transcriptional control. A future volume, however, will deal with other levels of regulation). The progress in understanding the control of eukaryotic transcription can only be appreciated by realizing that seven years ago we did not know the primary structure of a single sequence specific transcriptional activator, and those whose primary structures were available (e. g. , homeo domain proteins) were not yet recognized to function in this capacity.
Book Synopsis Coordinated Regulation of Gene Expression by : R. Clayton
Download or read book Coordinated Regulation of Gene Expression written by R. Clayton and published by Springer. This book was released on 1986-12 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Second Edinburgh International Workshop was held in September, 1984 and took as its topic the coordinated regulation of gene expression. The intention of this series of workshops is to promote exchange of ideas and data between scientists and clinicians whose interests span molecular and cell biology, development and differentiation, oncology, and genetic and developmental pathologies. It is hoped that such interdisciplinary discussions may give rise to fruitful insights. The meetings are structured to give ample time for discussion after each formal presentation and culminate in a session of general discussion which is reported at the end of the volume of proceedings. We are very grateful to the participants, all of whom participated in the discussion and whose contributions were essential to the success of the meeting. Novel ideas were often put forward and explored thoroughly from different angles. We normally expect to achieve quite rapid publication of the proceedings of the meeting and are grateful to authors who produced typescripts of their contributions expeditiously, but, as may sometimes be the case with multi-author works, some contributors had difficulty in meeting schedules for submitting manuscripts or corrections of the text of the discussion, and in one case we have been unable to publish any record of the contribution. Our committment to the publication of the discussion, allowing participants to make corrections to the transcript of the session, such as insertion of references and clarification of oral contributions, has also imposed some delay.
Book Synopsis Stress and Environmental Regulation of Gene Expression and Adaptation in Bacteria by : Frans J. de Bruijn
Download or read book Stress and Environmental Regulation of Gene Expression and Adaptation in Bacteria written by Frans J. de Bruijn and published by John Wiley & Sons. This book was released on 2016-07-13 with total page 1472 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Long-range Control of Gene Expression by : Aghajan
Download or read book Long-range Control of Gene Expression written by Aghajan and published by . This book was released on 2008 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Not Available.
Book Synopsis Biological Regulation and Development by : Robert F. Goldberger
Download or read book Biological Regulation and Development written by Robert F. Goldberger and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: The motivation for us to conceive this series of volumes on regulation was mainly our belief that it would be fun, and at the same time productive, to approach the subject in a way that differs from that of other treatises. We thought it might be interesting and instructive for both author and reader-to examine a particular area of investigation in a framework of many different problems. Cutting across the traditional boundaries that have separated the subjects in past volumes on regulation is not an easy thing to do-not because it is difficult to think of what interesting topics should replace the old ones, but because it is difficult to find authors who are willing to write about areas outside those pursued in their own laboratories. Anyone who takes on the task of reviewing a broad area of interest must weave together its various parts by picking up the threads from many different laboratories, and attempt to produce a fabric with a meaningful design. Finding persons who are likely to succeed in such a task was the most difficult part of our job. In the first volume of this treatise, most of the chapters dealt with the mechanisms of The second volume involved a somewhat regulation of gene expression in microorganisms. broader area, spanning the prokaryotic-eukaryotic border. Topics ranged from phage mor phogenesis to the role of gradients in development. The last volume-Volume 3A-con cerned hormones, as does this volume-Volume 3B.
Book Synopsis Guide to Biochemistry by : James C. Blackstock
Download or read book Guide to Biochemistry written by James C. Blackstock and published by Butterworth-Heinemann. This book was released on 2014-06-28 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Guide to Biochemistry provides a comprehensive account of the essential aspects of biochemistry. This book discusses a variety of topics, including biological molecules, enzymes, amino acids, nucleic acids, and eukaryotic cellular organizations. Organized into 19 chapters, this book begins with an overview of the construction of macromolecules from building-block molecules. This text then discusses the strengths of some weak acids and bases and explains the interaction of acids and bases involving the transfer of a proton from an acid to a base. Other chapters consider the effectiveness of enzymes, which can be appreciated through the comparison of spontaneous chemical reactions and enzyme-catalyzed reactions. This book discusses as well structure and function of lipids. The final chapter deals with the importance and applications of gene cloning in the fundamental biological research, which lies in the preparation of DNA fragments containing a specific gene. This book is a valuable resource for biochemists and students.
Book Synopsis Cell Cycle and Growth Control by : Gary S. Stein
Download or read book Cell Cycle and Growth Control written by Gary S. Stein and published by John Wiley & Sons. This book was released on 2004-05-24 with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive work provides detailed information on all known proteolytic enzymes to date. This two-volume set unveils new developments on proteolytic enzymes which are being investigatedin pharmaceutical research for such diseases as HIV, Hepatitis C, and the common cold. Volume I covers aspartic and metallo petidases while Volume II examines peptidases of cysteine, serine, threonine and unknown catalytic type. A CD-ROM accompanies the book containing fully searchable text, specialised scissile bond searches, 3-D color structures and much more.
