Insights Into RNase P RNA Structure and Function by a Retro-evolution Approach PDF Download
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Author: Dan Li
Publisher:
ISBN:
Category :
Languages : en
Pages : 162
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Book Description
Author: Dan Li
Publisher:
ISBN:
Category :
Languages : en
Pages : 162
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
RNase P catalyzes tRNA 5'-end maturation in all organisms and organelles. The enzyme is composed of a single RNA subunit plus a number of proteins that increases from bacteria (one protein) over archaea (at least four proteins) to eukarya (nine to ten proteins). Conserved base identities indicate that the RNase P RNA subunits (P RNAs) from all three kingsdoms of life stem from a common ancestor. Yet, only in bacteria the P RNA alone is substantially active in vitro without the protein, whereas archaeal and eukaryal P RNAs are more dependent on the contribution of their protein moieties and display only residual activity when these are absent. RNase P thus represents a natural model system for the switch from ribozyme to ribonucleoprotein enzyme, generally accepted to have occurred during natural evolution of the RNA world to the protein world. The RNA subunit of cyanelle RNase P from Cyanophora paradoxa contains essentially all structural elements of bacterial P RNAs, but has been reported to be catalytically inactive. In contrast to these previous observations, we were able to detect activity of this P RNA in the absence of protein cofactors. Furthermore, the C. paradoxa P RNA forms a functional holoenzyme with proteobacterial P proteins. Analysis of C- and S-domain swaps between cyanelle and Escherichia coli P RNA revealed that their domains have the capacity to cooperate, because the hybrid RNAs were functional. However, activities of the chimeras lagged behind the catalytic performance of the bacterial P RNA, suggesting that both the C- and S-domain of the cyanelle P RNA are weakly functional, thus limiting the activity of each type of chimera (EC or CE). In addition or alternatively, domain interaction and overall folding may be suboptimal in the chimeras, as it likely is in the wild-type cyanelle P RNA. Furthermore, the organellar ribozyme is unusual compared to the consensus of bacterial P RNAs: RNA-alone activity is low and structural alterations as small as.
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Category :
Languages : en
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Author: Gustavo Caetano-Anoll¿s
Publisher: John Wiley & Sons
ISBN: 1118210719
Category : Science
Languages : en
Pages : 529
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Book Description
A comprehensive, authoritative look at an emergent area in post-genomic science, Evolutionary genomics is an up-and-coming, complex field that attempts to explain the biocomplexity of the living world. Evolutionary Genomics and Systems Biology is the first full-length book to blend established and emerging concepts in bioinformatics, evolution, genomics, and structural biology, with the integrative views of network and systems biology. Three key aspects of evolutionary genomics and systems biology are covered in clear detail: the study of genomic history, i.e., understanding organismal evolution at the genomic level; the study of macromolecular complements, which encompasses the evolution of the protein and RNA machinery that propels life; and the evolutionary and dynamic study of wiring diagrams—macromolecular components in interaction—in the context of genomic complements. The book also features: A solid, comprehensive treatment of phylogenomics, the evolution of genomes, and the evolution of biological networks, within the framework of systems biology A special section on RNA biology—translation, evolution of structure, and micro RNA and regulation of gene expression Chapters on the mapping of genotypes to phenotypes, the role of information in biology, protein architecture and biological function, chromosomal rearrangements, and biological networks and disease Contributions by leading authorities on each topic Evolutionary Genomics and Systems Biology is an ideal book for students and professionals in genomics, bioinformatics, evolution, structural biology, complexity, origins of life, systematic biology, and organismal diversity, as well as those individuals interested in aspects of biological sciences as they interface with chemistry, physics, and computer science and engineering.
Author: Vassili N. Kouvelis
Publisher: Frontiers Media SA
ISBN: 2889760618
Category : Science
Languages : en
Pages : 147
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Author: Jens Kurreck
Publisher: Royal Society of Chemistry
ISBN: 0854041168
Category : Medical
Languages : en
Pages : 362
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Book Description
This book provides a compelling overall update on current status of RNA interference
Author:
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1844
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Author: Thomas Dandekar
Publisher: Springer Science & Business Media
ISBN: 3642979939
Category : Science
Languages : en
Pages : 270
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Book Description
This book provides an introduction to and an overview of the field of regulatory RNA, focusing on the identification of regulatory elements and motifs in such RNA molecules. Central to the book is the use of appropriate techniques to identify regulatory RNA and regulatory motifs. The prospects for this new and expanding research field - understanding regulatory RNA elements and motifs - are also explored, including new developments, medical applications, and applications in other fields.
Author: Roderick D.M. Page
Publisher: John Wiley & Sons
ISBN: 1444313363
Category : Science
Languages : en
Pages : 352
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Book Description
The study of evolution at the molecular level has given the subject of evolutionary biology a new significance. Phylogenetic 'trees' of gene sequences are a powerful tool for recovering evolutionary relationships among species, and can be used to answer a broad range of evolutionary and ecological questions. They are also beginning to permeate the medical sciences. In this book, the authors approach the study of molecular evolution with the phylogenetic tree as a central metaphor. This will equip students and professionals with the ability to see both the evolutionary relevance of molecular data, and the significance evolutionary theory has for molecular studies. The book is accessible yet sufficiently detailed and explicit so that the student can learn the mechanics of the procedures discussed. The book is intended for senior undergraduate and graduate students taking courses in molecular evolution/phylogenetic reconstruction. It will also be a useful supplement for students taking wider courses in evolution, as well as a valuable resource for professionals. First student textbook of phylogenetic reconstruction which uses the tree as a central metaphor of evolution. Chapter summaries and annotated suggestions for further reading. Worked examples facilitate understanding of some of the more complex issues. Emphasis on clarity and accessibility.
Author: Vladimir Uversky
Publisher: John Wiley & Sons
ISBN: 0470618310
Category : Science
Languages : en
Pages : 532
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Book Description
This book provides up-to-date information on experimental and computational characterization of the structural and functional properties of viral proteins, which are widely involved in regulatory and signaling processes. With chapters by leading research groups, it features current information on the structural and functional roles of intrinsic disorders in viral proteomes. It systematically addresses the measles, HIV, influenza, potato virus, forest virus, bovine virus, hepatitis, and rotavirus as well as viral genomics. After analyzing the unique features of each class of viral proteins, future directions for research and disease management are presented.
