Download or read book Structure function Analysis of the Mitogen activated Protein Kinase Encoded by the KSS1 Gene of Saccharomyces Cerevisiae written by Robert M. Archer and published by . This book was released on 1994 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Function and Regulation of Mitogen activated Protein Kinases in the Yeast Saccharomyces Cerevisiae written by Raymond Eric Chen and published by . This book was released on 2008 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Function and Signaling Specificity of the Hog1 Mitogen Activated Protein Kinase in the Yeast Saccharomyces Cerevisiae written by Jesse Christopher Patterson and published by . This book was released on 2011 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiple mitogen-activated protein kinases (MAPKs) enable eukaryotic cells to evoke an appropriate response when presented with a particular stimulus. In the yeast Saccharomyces cerevisiae, MAPK Hog1 is activated by osmosensors in the high-osmolarity glycerol (HOG) pathway during hyperosmotic stress, MAPK Fus3 is activated by pheromone-binding receptors in the mating pathway, and MAPK Kss1 is activated by mucins in the filamentous growth (FG) pathway during nutrient limitation. These pathways provide an excellent model for studying mechanisms and principles of signal transduction in a genetically and biochemically tractable organism because these conserved pathways have served countless species in their struggle to adapt to change throughout evolution. Upon hyperosmotic shock, yeast cells accumulate intracellular glycerol to balance the osmotic gradient. It had been accepted that Hog1 elevates glycerol production by inducing the transcription of enzymes necessary for glycerol synthesis. Using global microarray analysis, I found that Hog1-dependent transcription is not necessary for hyperosmotic shock survival. Instead, Hog1 increases glycerol production by directly regulating metabolism and work presented in this thesis describes progress made towards understanding how this control is exerted. The HOG, mating and FG pathways share common upstream activators, including Ste50 (adapter protein), Ste20 [p21-activated protein kinase (PAK)], Ste11 [MAPK kinase kinase (MAPKKK)] and Cdc42 [guanosine tri-phosphatase (GTPase)]. Activation of Ste11 within the HOG pathway does not result in Ste11-mediated activation of the mating or FG pathways. Tellingly, if Hog1 function is absent, hyperosmotic stress does result in Ste11-mediated activation of these other MAPK pathways, a situation called crosstalk. Therefore, a mechanism of Hog1-enforced crosstalk prevention exists. Using single-cell analysis of both HOG and mating pathway activation, I found that crosstalk is prevented by insulation of the HOG pathway from other MAPK pathways, over-turning a previously established erroneous model of cross-inhibition. Through a genetic selection, I found that Rga1 [a Cdc42 GTPase-activating protein (GAP)] is required for HOG pathway insulation, that Rga1 is a substrate of Hog1, that it contributes to negative feedback regulation of the HOG pathway, and that Rga1 presumably helps prevent crosstalk by limiting the extent and duration of Cdc42 activation.
Download or read book Activation and Function of the Saccharomyces Cerevisiae MAP Kinase Kss1 written by Jeanette Gowen Cook and published by . This book was released on 1996 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Genetic Analysis of Signaling by the Saccharomyces Cerevisiae Mitotic Kinases Cdc15 Dbf2 and Cdc5 written by Jennifer L. Paulson and published by . This book was released on 2006 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Protein phosphorylation is a ubiquitous regulatory mechanism for cellular signal propagation, and the complexity of signaling networks presents a challenge to protein kinase substrate identification. Chemical genetic control of kinase function provides a handle for kinase pathway analysis. Here, we apply this approach to three kinases that function in a signaling network that regulates exit from mitosis in the budding yeast, Saccharomyces cerevisiae. These include the mitogen-activating protein kinase, Cdc15, the nuclear Dbf2-related kinase, Dbf2, and the Polo-like kinase, Cdc5. Each kinase was successfully engineered for selective chemical inhibition in vivo. We found that monospecific pharmacological inhibition of Cdc5 delays anaphase nucleus migration into the bud, revealing a novel Cdc5 function. Additionally, chemical genetic, bioinformatic, and yeast proteomic tools were combined for Cdc5 substrate identification. Systematically chosen candidate Cdc5 substrates were examined for loss of phosphorylation upon cellular Cdc5 inhibition. The identified Cdc5 targets include Spc72, a spindle pole body (SPB) component and microtubule anchor required for nuclear positioning. Spc72 binds Cdc5 in a cell cycle specific manner, and in vivo Cdc5 inhibition prevents mitotic Spc72 phosphorylation. Studies in vitro demonstrate direct Spc72 phosphorylation by Cdc5. Finally, we expanded our knowledge of Cdc5 function at the SPB by examining SPB-localized proteins for presence in a Cdc5 complex. In summary, a chemical genetic approach was used to inhibit three protein kinases from diverse families, which led to a greater understanding of Cdc5 cellular function.
Download or read book Genetic Analysis of a Mitogen activated Protein Kinase Required for Spore Morphogenesis in Saccharomyces Cerevisiae written by Marisa Wagner and published by . This book was released on 1998 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Enzymes written by and published by Elsevier. This book was released on 2023-11-07 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Enzymes, Volume 54 highlights new advances in enzymes, with new chapters on a variety of topics, including the History of The Enzymes, Impact of The Enzymes in chronicling biochemical processes and pathways, Metabolism and Catalysis, Mitochondrial ATP synthase, The respiratory chain, A century of mitochondrial research, Five decades of metalloenzymology, Mechanisms of catalysis, Mitochondrial fatty acid synthesis and associated processes, Signaling, MAPK cascades: Origins, mechanisms and current status, Sphingolipids: From structural components to signaling hubs, Protein Homeostasis and Hydrolysis, Mitochondrial AAA+ proteases, Hsp70 and JDP proteins: structure-function perspective on molecular chaperone activity. Other sections cover DNA Replication and Repair, Structure-function studies of DNA replication proteins, and Helicases required for nucleotide excision repair. Provides the authority and expertise of leading contributors from an international board of authors Updated release includes the latest information on enzymes
Download or read book Yeast MAP Kinase Pathways with Overlapping Components Achieve Specificity in Part Via a Scaffold and Docking Sites written by Kandarp Harshadray Shah and published by . This book was released on 2010 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mitogen-activated protein kinase (MAPK) cascades in eukaryotic cells act in multiple pathways that share signaling components. Saccharomyces cerevisiae, the budding yeast, is an ideal model to study MAPK signaling specificity because its mating and invasive growth pathways share an entire cascade yet maintain specificity. The cascade contains the MAPK kinase kinase Ste11, MAPK kinase Ste7 and the MAPK Kss1. In addition there is another MAPK Fus3 that acts in mating. It has been proposed that Ste5, the scaffold for MAPK cascade, and Ste7 docking sites for Fus3 and Kss1 may promote specificity. Here the role of Ste7 docking sites in combination with Ste5 scaffolding of Ste7 was analyzed to understand signal transduction in both pathways. Results indicate that the two previously identified docking sites on Ste7 function in signal transduction for both mating and invasive growth. Fus3 can be phosphorylated in the absence of docking sites but requires the sites for full activation. Kss1 is entirely dependent on docking sites for its activation. In contrast, Ste5 scaffolding of Ste7 is required for mating but not for invasive growth. In absence of scaffolding, phosphorylation of Fus3 is reduced dramatically and level of Kss1 activation is reduced moderately. Interestingly, this moderate Kss1 activation by mating pheromone leads to a low-level induction of invasive growth genes but not mating genes, indicating that mating genes have a higher threshold for activation by Kss1. The low-level induction suggests that amount of active Kss1 is important for invasive growth and further indicates that Fus3-mediated negative feedback that controls Kss1 activation is critical in promoting mating specificity. The conclusion from these results is that Ste5 contributes to mating and invasive growth but it is only crucial for mating. The docking sites on Ste7 are crucial for both mating and invasive growth.
Download or read book MAP Kinase Signaling Protocols written by Rony Seger and published by Humana. This book was released on 2016-08-23 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mitogen-activated protein (MAP) kinase (MAPK) cascades are key signaling components that govern essentially all cellular processes evoked by any type of stimulation, and it has been well established that the malfunctioning of these cascades leads to various diseases including cancer, autoimmunity, and diabetes. In MAP Kinase Signaling Protocols, Second Edition, expert researchers fully update the popular first edition the key techniques used in the study of MAPK signaling cascades in various cellular contexts. This thorough volume explores essential topics such as activation and function of components of the MAPK signaling cascades, the study of MAPK cascades as transmitters of membranal receptor signals, structure-function relationships of MAPKs, studies on the regulation of MAPK cascades, the use of lower organisms, animal models, and human genetics in the study of MAPKs, as well as the study of MAPKs in specific systems and diseases. Written in the highly successful Methods in Molecular BiologyTM series format, chapters includes introductions to their respective subjects, lists of the necessary materials, step-by-step, readily reproducible laboratory protocols, and tips on troubleshooting and avoiding known pitfalls. Comprehensive and cutting-edge, MAP Kinase Signaling Protocols, Second Edition aims to facilitate the study of MAPKs and allow for quicker progress in our knowledge of many vital cellular processes as well as devastating diseases.
Download or read book Control of the M G1 and G1 S Phase Transitions in Saccharomyces Cerevisiae written by Lorrie Boucher and published by . This book was released on 2007 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mitogen-activated protein kinase (MAPK) cascades convey signals in eukaryotic cells through the sequential phosphorylation and activation of three protein kinases. In yeast, mating and filamentous growth share multiple components of a single MAPK cascade. These kinases are the MAPKKK Ste 11, the MAPKK Ste7 and two MAPKs, Fus3 and Kss1. The transcription factor Ste 12 is the target of both developmental pathways. The first part of this thesis addressed the mechanisms that ensure signal fidelity between the two signal outputs. This work challenges the model that the MAPK Fus3 ensures specificity in the mating response by physically occluding the MAPK Kss1 from the active Ste5 complex. I demonstrated that deletion of either individual MAPK had little affect on the genome-wide transcriptional response to pheromone. Further, catalytically inactive versions of Fus3 largely failed to attenuate the transcriptional response to pheromone in fus3Delta cells, and the exposure to mating pheromone stimulated the kinase activity of both MAPKs. I thus propose that both Fus3 and Kss1 are bona fide components of the mating program. To define the role of distal MAPK components in invasive growth and the presence of an associated transcriptional program, I performed genome-wide transcriptional analysis on combinatorial deletion strains of FUS3, KSS1, RST1 and RST2. This analysis revealed that Rst1 and Fus3 are the dominant inhibitors of invasive growth. By comparing transcriptional profiles of invasive versus non-invasive strains, I demonstrated that there is no concrete transcriptional program associated with invasive growth. Thus, invasive growth can be viewed as a component of the pheromone response. The second part of this thesis focuses on the Mitotic Exit Network (MEN), a signaling cascade that is activated at the end of mitosis to shut down cyclin-dependent kinase (CDK) activity. To identify novel MEN regulators, I used a high-throughput genetic approach to identify synthetic lethal interactions with nine men mutants. In total, 84 genes were identified that I named MEN Interactors (MNIs). The confirmed genetic interactions have provided connections to pathways with previously uncharacterized roles in mitotic exit. Furthermore, this study reveals that the PKC/MAPK pathway may not function in a linear manner with respect to MEN.
Download or read book Stress Activated Protein Kinases written by Francesc Posas and published by Springer Science & Business Media. This book was released on 2008-01-24 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book leading researchers in the field discuss the state-of-the-art of many aspects of SAPK signaling in various systems from yeast to mammals. These include various chapters on regulatory mechanisms as well as the contribution of the SAPK signaling pathways to processes such as gene expression, metabolism, cell cycle regulation, immune responses and tumorigenesis. Written by international experts, the book will appeal to cell biologists and biochemists.
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1994 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metabolism and Molecular Physiology of Saccharomyces Cerevisiae written by J. Richard Dickinson and published by CRC Press. This book was released on 2004-04-27 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the publication of the best-selling first edition, much has been discovered about Saccharomyces cerevisiae, the single-celled fungus commonly known as baker's yeast or brewer's yeast that is the basis for much of our understanding of the molecular and cellular biology of eukaryotes. This wealth of new research data demands our attention and r
Download or read book Biochemistry and Molecular Biology written by Robert Brambl and published by Springer Science & Business Media. This book was released on 2004-05-06 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biochemistry and molecular biology are among the most rapidly emerging areas in the life sciences. Indeed, a number of important advances have been made with fungi and yeasts since the first edition of this volume was published in 1996. Still further, the influence that genomics projects have had on the design and interpretation of experiments in almost all areas is truly impressive. The availability of large amounts of sequence data has quickly altered the scope and dimensions of genetics and biochemistry, leading to new insights into fungal biology. Earlier chapters on mitochondrial import of proteins, pH and regulation of gene expression, stress responses, signal transduction, polysaccharidases, trehalose metabolisms, polyamines, carbon metabolism, and acetamide metabolism have been extensively revised or rewritten. Completely new chapters have been prepared on gene ontogeny, peroxisomes, mitochondrial gene expression, chitin biosynthesis, iron metabolism, GATA transcription factors, carbon metabolism, and sulfur metabolism.
Download or read book Cumulated Index Medicus written by and published by . This book was released on 1991 with total page 1460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Membrane Biogenesis written by Jos A.F. Op den Kamp and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many individual aspects of the dynamics and assembly of biological membranes have been studied in great detail. Cell biological approaches, advanced genetics, biophysics and biochemistry have greatly contributed to an increase in our knowledge in this field.lt is obvious however, that the three major membrane constituents - lipids, proteins and carbohydrates- are studied, in most cases separately and that a coherent overview of the various aspects of membrane biogenesis is not readily available. The NATO Advanced Study Institute on "New Perspectives in the Dynamics of Assembly of Biomembranes" intended to provide such an overview: it was set up to teach students and specialists the achievements obtained in the various research areas and to try and integrate the numerous aspects of membrane assembly into a coherent framework. The articles in here reflect this. Statting with detailed contributions on phospholipid structure, dynamics, organization and biogenesis, an up to date overview of the basic, lipidic backbone of biomembranes is given. Extensive progress is made in the research on membrane protein biosynthesis. In particular the post- and co-translational modification processes of proteins, the mechanisms of protein translocation and the sorting mechanisms which are necessary to direct proteins to their final, intra - or extracellular destination have been characterized in detail. Modern genetic approaches were indispensable in this research area: gene cloning, hybrid protein construction, site directed mutagenesis and sequencing techniques elucidated many functional aspects of specific nucleic acid and amino acid sequences.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2002 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt:
