[PDF] The Rna Metabolism Of Nucleoli And Mitochondria In Mammalian Cells eBook

Author : Jorge Cruz-Reyes
Publisher : Springer
Page : 255 pages
File Size : 15,16 MB
Release : 2018-06-12
Category : Science
ISBN : 3319781901

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This volume focuses on mitochondrial RNA metabolism, emphasizing recent discoveries and technological advances in this fast moving area that increase our understanding of mitochondrial gene function. Topics addressed include the interplay of mitochondria with the nucleus and cytosol, structure-function connections, and relevance to human disease. Mitochondria are the powerhouses of the cell, and a great deal is known about mitochondrial energy metabolism. Less well known is the plethora of amazing mechanisms that have evolved to control expression of mitochondrial genomes. Several RNA processes and machineries in protozoa, plants, flies and humans are discussed, including: transcription and RNA polymerase mechanism; tRNA processing of 5′ and 3′ ends; mRNA maturation by nucleotide insertion/deletion editing and by RNA splicing; mRNA stability; and RNA import. Specialized factors and ribonucleoproteins (RNPs) examined include pentatricopeptide repeat (PPR) proteins, RNase P, polymerases, helicases, nucleases, editing and repair enzymes. Remarkable features of these processes and factors are either not found outside mitochondria, differ substantially among eukaryotic lineages, or are unique in biology.

Author : Mark O. J. Olson
Publisher : Springer Science & Business Media
Page : 434 pages
File Size : 27,44 MB
Release : 2011-09-15
Category : Science
ISBN : 1461405149

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Within the past two decades, extraordinary new functions for the nucleolus have begun to appear, giving the field a new vitality and generating renewed excitement and interest. These new discoveries include both newly-discovered functions and aspects of its conventional role. The Nucleolus is divided into three parts: nucleolar structure and organization, the role of the nucleolus in ribosome biogenesis, and novel functions of the nucleolus.

Author : Alan C. Sartorelli
Publisher : Springer Science & Business Media
Page : 1100 pages
File Size : 26,5 MB
Release : 2013-11-27
Category : Medical
ISBN : 3642658067

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Over the past two decades a number of attempts have been made, with varying degrees of success, to collect in a single treatise available information on the basic and applied pharmacology and biochemical mechanism of action of antineoplastic and immunosuppressive agents. The logarithmic growth of knowledge in this field has made it progressively more difficult to do justice to all aspects of this topic, and it is possible that the present handbook, more than four years in preparation, may be the last attempt to survey in a single volume the entire field of drugs employed in cancer chemotherapy and immunosuppression. Even in the present instance, it has proved necessary for practical reasons to publish the material in two parts, although the plan of the work constitutes, at least in the editors' view, a single integrated treatment of this research area. A number of factors have contributed to the continuous expansion of research in the areas of cancer chemotherapy and immunosuppression. Active compounds have been emerging at ever-increasing rates from experimental tumor screening systems maintained by a variety of private and governmental laboratories through out the world. At the molecular level, knowledge of the modes of action of established agents has continued to expand, and has permitted rational drug design to play a significantly greater role in a process which, in its early years, depended almost completely upon empirical and fortuitous observations.

Author : Donald Roodyn
Publisher : Springer Science & Business Media
Page : 399 pages
File Size : 42,23 MB
Release : 2013-11-11
Category : Science
ISBN : 1461579422

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The transition from the quarterly Sub-Cellular Biochemistry to the annual SUBCELLULAR BIOCHEMISTRY is a good opportunity to restate the aims and scope of this publication. They were originally given (in Volume 1 No. 1) as follows: This review and essay journal . . . brings together work on a wide range of topics in sub-cellular biochemistry in the hope of stimulating progress towards an integrated view of the cell. It deals with the biochemistry and general biology of nuclei, mitochondria, lysosomes, peroxisomes, chloroplasts, cell membranes, ribosomes, cell sap, flagellae and other specialized cell components. In addition to articles dealing with conventional biochemical studies on sub-cellular struc tures, the journal publishes articles on the genetics, evolution and biogenesis of cell organelles, bioenergetics, membrane behaviour and the interaction between cell structures, particularly between nucleus and cytoplasm. The first four volumes (in the quarterly format) fulfilled many, but not all, of these stated aims, and it is hoped that further articles in the new annual series will soon fill any deficiencies in the range of topics covered. Over the years we have intentionally not interpreted the title of the publication in a too literal sense. Although we have included specific articles on individual subcellular fractions (and certainly hope to do so again) the publication is definitely not only concerned with studies on the biochemistry of isolated cell fractions. The primary target is the "integrated view of the cell.

Author : J. Urquhart
Publisher : Springer Science & Business Media
Page : 302 pages
File Size : 50,27 MB
Release : 2012-12-06
Category : Science
ISBN : 1468428470

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Drugs are molecular agents of a physician's purpose. Discussions of their mechanisms of action center upon biochemical processes, even though the therapeutic intent may be to create an effect at a higher level of organization. We often prescribe to stop pain, increase vigor, assure sleep, curtail infection, alleviate inflammation, elevate mood, etc. To achieve rational therapy at high levels of organization it is not enough to know the molecular structures of drugs, and the points at which they couple into biochemical reaction chains. Such knowledge deals with static concepts, whereas the biosystems we treat extend in the dimensions of time as well as in those of space. Even when "resting", a biosystem manifests a dynamic stability, and sustains numerous processes whose successive states follow trajectories in time. A chemical message is not necessarily received by a biosystem as the same signal at one time as at another. Studies of cell cycle biochemistry, and of circadian variations in toxicity of some agents, have emphasized the importance of time as an aspect of therapeutics. In this volume, temporal aspects of living systems are considered. In the first section they are dealt with from the point of view of general design principles, in three papers by Morowitz, by Yates and Iberall, and by Winfree. In the second section, papers by Kaiser and by Thompson present accounts of sequential events in fundamental subcellular processes.