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Related Concept Videos

RNA Splicing01:32

RNA Splicing

Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
RNA Splicing01:32

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Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
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Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...
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The eukaryotic nucleus is a double membrane-bound organelle that contains nearly all of the cell’s genetic material in the form of chromosomes. It is rightly called the “brain” of the cell as it shoulders the responsibility of responding to various physiological processes, stress, altered metabolic conditions, and other cellular signals. 
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Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...
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The eukaryotic nucleus is a double membrane-bound organelle that contains nearly all of the cell’s genetic material in the form of chromosomes. It is rightly called the “brain” of the cell as it shoulders the responsibility of responding to various physiological processes, stress, altered metabolic conditions, and other cellular signals. 
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Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins
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A common core RNP structure shared between the small nucleoar box C/D RNPs and the spliceosomal U4 snRNP.

N J Watkins1, V Ségault, B Charpentier

  • 1Max-Planck-Institut für Biophysikalische Chemie, Abteilung Zelluläre Biochemie, Göttingen, Germany.

Cell
|November 18, 2000
PubMed
Summary

Snu13p protein binds to box C/D small nucleolar RNAs (snoRNAs), which are crucial for RNA processing. Depleting Snu13p disrupts RNA metabolism, suggesting a conserved role in ribonucleoprotein complexes.

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Area of Science:

  • Molecular Biology
  • RNA Biology
  • Genetics

Background:

  • Box C/D small nucleolar RNAs (snoRNAs) are essential for guiding 2'-O-methylation and processing ribosomal RNA.
  • Snu13p, a protein component of the U4/U6.U5 tri-snRNP, is known to be involved in splicing.
  • The structural and functional roles of Snu13p in RNA metabolism are not fully understood.

Purpose of the Study:

  • To investigate the association of Snu13p with box C/D snoRNAs.
  • To determine the functional significance of Snu13p-snoRNA interaction in RNA metabolism.
  • To explore the evolutionary relationship between U4 snRNPs and box C/D snoRNPs.

Main Methods:

  • Genetic depletion of Snu13p in yeast.
  • In vitro binding assays to assess Snu13p-box C/D motif interaction.
  • Structural analysis of box C/D motifs and U4 snRNA binding sites.

Main Results:

  • Snu13p was found to be associated with box C/D snoRNAs.
  • Genetic depletion of Snu13p in yeast resulted in significant defects in RNA metabolism.
  • The box C/D motif shares structural similarities with the Snu13p binding site in U4 snRNA and binds Snu13p in vitro.

Conclusions:

  • Snu13p plays a crucial role in the function of box C/D snoRNPs, impacting overall RNA metabolism.
  • The structural and functional parallels between U4 snRNPs and box C/D snoRNPs suggest a common evolutionary origin.
  • Snu13p acts as a conserved chaperone protein for both snRNPs and snoRNPs.