Author: Robert Louis Last
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author: Tucker Joe Carrocci
Publisher:
ISBN:
Category :
Languages : en
Pages : 251

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RNA splicing plays many critical roles in eukaryotic gene expression, yet even 40 years after its discovery, the mechanism by which the spliceosome recognizes and removes introns is still poorly understood. In my thesis, I describe methods to produce RNAs for studies of the spliceosome and my work towards understanding an early step in splicing, branchsite selection. In my thesis, I discuss methods to label RNA fluorescently. I used MS2 fusion proteins tags to the label RNAs in living yeast using small molecule fluorophores. These tags allow for visualization of localized RNAs and demonstrate that organic fluorophores can be targets to RNAs in living yeast. I then discuss work performed in collaboration with Dr. Jiacui Xu on the development of aptamers that can bind fluorescent molecules directly, obviating the need for protein. Finally, I show that the 10DM24 deoxyribozyme can be used to prepare long, site-specifically modified fluorescent pre-mRNAs and demonstrate methods that can circumvent debranching by the splicing factor, Dbr1. In the second portion of my thesis, I discuss work on the role of splicing factors that contribute to branchsite choice. I explored the role of cancer causing mutations in a protein called SF3b1 using the yeast spliceosome. Mutations of SF3b1 result in changes in branchsite usage by the spliceosome. These mutations can impair and improve nonconsensus intron splicing, which we propose derives from a change in the conformation of the protein. I also explored differences between the human and yeast proteins and define regions that cannot be exchanged despite high sequence conservation. These differences explain the lack of efficacy of the spliceosome inhibitor, pladienolide B on the yeast spliceosome. Finally, I used smFRET to observe dynamics in the splicing factor Prp5, which ensures proper branchsite usage by the spliceosome. I showed that Prp5 primarily adopts an open state in the absence of ATP and RNA but transitions to a closed state upon binding. This work provides a strong foundation to define the mechanism of Prp5 proofreading of the branchsite. Overall, my work has significantly contributed to our understanding of spliceosome and the mechanisms of branchsite selection.

Author: Robert E. Farrell Jr.
Publisher: Elsevier
ISBN: 0080454763
Category : Science
Languages : en
Pages : 794

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This laboratory guide represents a growing collection of tried, tested and optimized laboratory protocols for the isolation and characterization of eukaryotic RNA, with lesser emphasis on the characterization of prokaryotic transcripts. Collectively the chapters work together to embellish the RNA story, each presenting clear take-home lessons, liberally incorporating flow charts, tables and graphs to facilitate learning and assist in the planning and implementation phases of a project.RNA Methodologies, 3rd edition includes approximately 30% new material, including chapters on the more recent technologies of RNA interference including: RNAi; Microarrays; Bioinformatics. It also includes new sections on: new and improved RT-PCR techniques; innovative 5' and 3' RACE techniques; subtractive PCR methods; methods for improving cDNA synthesis.* Author is a well-recognized expert in the field of RNA experimentation and founded Exon-Intron, a well-known biotechnology educational workshop center * Includes classic and contemporary techniques * Incorporates flow charts, tables, and graphs to facilitate learning and assist in the planning phases of projects

Author: Fritz Eckstein
Publisher: Springer Science & Business Media
ISBN: 3642837093
Category : Science
Languages : en
Pages : 281

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A wide range of topics are covered, including articles on nucleic acid structure, through their interactions with proteins to the control of gene expression. A number of authors address the subject of RNA, including the difficult but important subject of its chemical synthesis, the complexities of its structures and the mechanisms of transcript splicing. The probing of DNA structure is reviewed in papers on the application of hydroxyl radical and 1,10 phenanthroline copper cleavages. A number of important DNA-protein interactions are discussed, including DNA polymerase, the tryptophan and deoR repressors, and the resolvase enzymes which cleave Holliday junctions in recombination. Gene transcription is also covered, from the points of view of DNA methylation, mammalian ribosomal and avian lysozyme genes, and the control of transcription in the proto-oncogene c-fos. Finally, the plant kingdom has not been forgotten with articles on development and transposition in plants.

Author:
Publisher:
ISBN:
Category : Biochemistry
Languages : en
Pages : 552

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No. 2, pt. 2 of November issue each year from v. 19 (1963)-47 (1970) and v. 55 (1972)- contain the Abstracts of papers presented at the Annual Meeting of the American Society for Cell Biology, 3d (1963)-10th (1970) and 12th (1972)-

Author: Tyson A. Clark
Publisher:
ISBN:
Category : Eukaryotic cells
Languages : en
Pages : 422

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Author:
Publisher:
ISBN: 9780815332183
Category : Cells
Languages : en
Pages : 0

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Author: M. Grunberg-Manago
Publisher: Springer Science & Business Media
ISBN: 1468456644
Category : Science
Languages : en
Pages : 273

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The Workshop on "Evolutionary Tinkering in Gene Expression" which was held at the end of August 1988. was planned to celebrate 20 successful Advanced Study Institutes (A. S. I.) in Molecular and Cell Biology. The first Institute was held in 1966 on the Island of Spetsai. after a N. A. T. O. suggestion and was entirely financed by N. A. T. O. The success was immediately so great that the Institute grew very rapidly and in the following years. N. A. T. O .• E. M. B. O. (since 1972) and F. E. B. S. (since 1981) co-sponsored it. Since the start of the AS!. the U. S. National Science Foundation has granted travel money for a limited number of American participants each year. In addition. the course was supported by minor industrial subsidies of varying amounts which enabled the organizers to improve some of the local facilities particularly with respect to the lecture hall. In particular. Boehringer Mannheim has contributed since 1966. Furthermore. the Greek Ministry of Science and Culture has provided support at least for a social event during each ASI.

Author: Angus I. Lamond
Publisher: Springer Science & Business Media
ISBN: 3662223252
Category : Science
Languages : en
Pages : 230

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he past fifteen years have seen tremendous growth in our understanding of T the many post-transcriptional processing steps involved in producing func tional eukaryotic mRNA from primary gene transcripts (pre-mRNA). New processing reactions, such as splicing and RNA editing, have been discovered and detailed biochemical and genetic studies continue to yield important new insights into the reaction mechanisms and molecular interactions involved. It is now apparent that regulation of RNA processing plays a significant role in the control of gene expression and development. An increased understanding of RNA processing mechanisms has also proved to be of considerable clinical importance in the pathology of inherited disease and viral infection. This volume seeks to review the rapid progress being made in the study of how mRNA precursors are processed into mRNA and to convey the broad scope of the RNA field and its relevance to other areas of cell biology and medicine. Since one of the major themes of RNA processing is the recognition of specific RNA sequences and structures by protein factors, we begin with reviews of RNA-protein interactions. In chapter 1 David Lilley presents an overview of RNA structure and illustrates how the structural features of RNA molecules are exploited for specific recognition by protein, while in chapter 2 Maurice Swanson discusses the structure and function of the large family of hnRNP proteins that bind to pre-mRNA. The next four chapters focus on pre-mRNA splicing.

Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 788

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