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Tuesday, May 5, 2020 | History

2 edition of Ribosomal RNA and group I introns found in the catalog.

Ribosomal RNA and group I introns

Ribosomal RNA and group I introns

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  • 3 Currently reading

Published by Springer, R.G. Landes in New York, Austin, Tex .
Written in English

    Subjects:
  • RNA.,
  • Introns.,
  • Ribosomes.

  • Edition Notes

    Includes bibliographical references and index.

    Other titlesRibosomal RNA and group 1 introns, Ribosomal RNA and group one introns
    StatementRachel Green, Reneé Schroeder, [editors].
    SeriesMolecular biology intelligence unit, Molecular biology intelligence unit (Unnumbered)
    ContributionsGreen, Rachel., Schroeder, Renée, 1953-
    Classifications
    LC ClassificationsQP623 .R455 1996
    The Physical Object
    Pagination246 p. :
    Number of Pages246
    ID Numbers
    Open LibraryOL972638M
    ISBN 101570593795, 3540615628
    LC Control Number96009499

      The Neurospora CYT protein, the mitochondria! tyrosyl-transfer RNA synthetase (mt TyrRS), promotes splicing of the Neurospora mitochondrial large ribosomal RNA (LSU) and other group I introns Cited by: A family of optional group-I introns was found near the 3' end of the nuclear small subunit rRNA genes in 61 out of 70 isolates of the deuteromycete mycorrhizal fungus Cenococcum geophilum. DNA sequence polymorphisms among the introns (termed CgSSU introns) from ten of the isolates were studied.

    Each ribosomal RNA component is encoded by separate gene. The spliceosome is a large, ribonucleoprotein complex located in the. nucleus. The 5' and 3' untranslated regions (UTRs) of processed mRNA molecules are derived from Group I and group II introns are exclusively found in the mitochondrial and chloroplast encoded genes.   A family of optional group-I introns was found near the 3′ end of the nuclear small subunit rRNA genes in 61 out of 70 isolates of the deuteromycete mycorrhizal fungusCenococcum geophilum. DNA sequence polymorphisms among the introns (termedCgSSU introns) from ten of the isolates were studied. The sequences, ranging in size from to nucleotides, were from % Cited by:

    Group I introns are one of the four major classes of introns as defined by their distinct splicing mechanisms. Because they catalyze their own removal from precursor transcripts, group I introns are referred to as autocatalytic introns. Group I introns are common in fungal and protist nuclear ribosomal RNA genes and in organellar genomes. In contrast, they are rare in all other organisms and.   Abstract Group I introns include many mitochondrial ribosomal RNA and messenger RNA introns and the nuclear rRNA introns of Tetrahymena and Physarum 1–6. The splicing of precursor RNAs containing Cited by:


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Ribosomal RNA and group I introns Download PDF EPUB FB2

/ Andrea Barta and Isabella Halama --Ribosomal RNA, decoding and ribozymes / Seth Stern --Translocation on ribosomes / Knud H. Nierhaus --Activities of group I introns / Renee Schroeder --Metal ions as the key to the functioning of both the group I intron and the ribosome / Barbara Streicher and Mary G.

Wallis --Antibiotics that interfere with. Mohr, G., Lambowitz, A. Integration of a group I intron into a ribosomal RNA sequence promoted by a tyrosyl-tRNA synthetase. Nature– (). by:   Group I introns in nuclear genomes are exclusively found within functional ribosomal RNA (rRNA) genes of a wide spectrum of eukaryotic microorganisms.

Here they are frequently noted among red algae, chlorophyte algae, fungi, and myxomycetes, but only occasionally in ciliates [ 2 - 4 ].Cited by: The first step in splicing for group I introns (e.g., Tetrahymena pre-rRNA) is cleavage at the 5′ splice site mediated by a guanosine cofactor.

The 3′ end of the free exon then reacts with the 3′ splice site to excise the intron as a linear : Geoffrey M Cooper. The right angle (RA) motif: a prevalent ribosomal RNA structural pattern found in group I introns Wade W.

Grabow, 1 Zhuoyun Zhuang, 1 Zoe N. Swank, 1 Joan-Emma Shea, 1, 2 and Luc Jaeger 1, 3, * 1 Department of Chemistry and Biochemistry, University of. RNA Structure. Nucleotide Frequency Data. Base Pairs. 16S rRNA Model (Table) 16S rRNA Tentative (Table) 16S rRNA Lousy (Table) 23S rRNA Model (Table) 23S rRNA Tentative (Table) 23S rRNA Lousy (Table) 5S rRNA Model (Table) 5S rRNA Tentative (Table) Group I Intron RNA Model (Table) Group IIA Intron RNA Model (Table) Group IIB Intron RNA Model (Table).

The nuclear small subunit ribosomal RNA gene of the unicellular green alga Ankistrodesmus stipitatus contains a group I intron, the first of its kind to be found in the nucleus of a member of the plant by: Last modified on 10 September Literature Reference: Bhattacharya D., Cannone J.J., and Gutell R.R.

() Group I Intron Lateral Transfer Between Red and Brown Algal Ribosomal RNA. Current Genetics rRNA Introns. Four preconfigured online tables that disseminate intron information (for the introns that occur in the 16S and 23S rRNAs) and emphasize the major dimensions inherent in this data: 1) intron position in the rRNA, 2) intron type, 3) phylogenetic distribution, and 4) number of introns per exon gene.

Group I/II Intron Distributions. This wide distribution and phylogenetically sporadic existence of group-I introns has led to the hypothesis of horizontal transfer. In the pyrenomycete fungi, Nikoh and Fukatsu () supposed that the common ancestor of Cordyceps prolifica and C.

kanzashiana horizontally gained group-I introns of ribosomal DNA (rDNA) from distantly related fungi. Introns were first discovered in protein-coding genes of adenovirus, and were subsequently identified in genes encoding transfer RNA and ribosomal RNA genes.

Introns are now known to occur within a wide variety of genes throughout organisms and viruses within all of the biological kingdoms. Research Highlights The sequence space signature of the RA motif is determined by comparative structural and sequence analysis of ribosomal RNAs.

RA biophysical and topological properties are characterized by self-assembly. Experimental and theoretical analyses support evidence of RA in group I introns.

Data allow for predictive structural model of one of the peripheral elements of group I Cited by: Dimensions in Data Presentation: A, intron types (i.e., group I, group II, archaeal, spliceosomal, and unknown); B, the number of introns per site (for 3D images only); C, rRNA sites within Å of tRNA/mRNA; D, extent of conservation of the 16S and 23S rRNAs; E, structural domains from the 16S and 23S rRNA secondary structure models are distinguished.

Self-splicing group I introns have served as a model for RNA catalysis and folding for over two decades. New three-dimensional structures now bring the details into view. Revelations include an unanticipated turn in the RNA backbone around the guanosine-binding pocket.

Discovery of group I introns in the nuclear small subunit ribosomal RNA genes of Acanthamoeba Article (PDF Available) in Nucleic Acids Research 22(4) March with 70 Reads. Length polymorphisms in the ribosomal RNA (rRNA) genes are due to DNA fragment insertions, deletions, duplications and the presence of group I introns.

Group I introns are one of the major class introns widespread in mitochondria, chloroplasts and nuclear rDNA of eukaryotes including fungi, algae, slime molds and plants.

The sequences of the rRNA genes of Pneumocystis carinii from rat and human sources demonstrate three distinct genotypes based on the group I introns present in these genes.

One rat isolate (Pc1) contains such introns in its 16S and 26S rRNA genes, while another rat isolate (Pc2) and a human isolate (Pc3) only contain an intron in the 26S rRNA by: Group I introns are common in fungal and protist nuclear ribosomal RNA genes and in organellar genomes.

In contrast, they are rare in all other organisms and genomes, including bacteria. ResultsCited by:   Recently, several genes coding for messenger RNA, transfer RNA and ribosomal RNA in eukaryotes have been found to be interrupted in their coding regions by Cited by: RNA polymerase recognizes and binds to specific regions of the DNA called introns c.

RNA editing removes the exons from pre-mRNA, leaving only the introns in the final molecule. More than introns have been documented at over unique sites in the small and large subunit ribosomal RNA genes (as of February ). Nearly all of these introns are assigned to one of four main types: group I, group II, archaeal and by: The antiquity of group I introns David A.

Shub University at Albany, SUNY, Albany, New York, USA The recent discovery of self-splicing introns in cyanobacteria has given renewed interest to the question of whether introns may have been present in the ancestor of all living things.Analysis of the Chloroplast Large Subunit Ribosomal RNA Gene from 17 Chlamydomonas Taxa: Three Internal Transcribed Spacers and 12 Group I Intron Insertion Sites.

internal transcribed spacers sharing the same positions in all of the 17 taxa as well as the presence of a total of 39 group I introns representing 12 insertion by: