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Related Concept Videos

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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Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
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In eukaryotic cells, transcripts made by RNA polymerase are modified and processed before exiting the nucleus. Unprocessed RNA is called precursor mRNA or pre-mRNA to distinguish it from mature mRNA.
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Using the E1A Minigene Tool to Study mRNA Splicing Changes
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Co-transcriptional splicing and the CTD code.

Noélia Custódio1, Maria Carmo-Fonseca1

  • 1a Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa , Lisboa , Portugal.

Critical Reviews in Biochemistry and Molecular Biology
|September 14, 2016
PubMed
Summary
This summary is machine-generated.

Recent findings reveal that gene splicing occurs faster than previously believed, closely coupled with RNA polymerase II (Pol II) phosphorylation. This suggests a more complex regulatory role for Pol II

Keywords:
CTD codeRNA Polymerase IIspliceosomesplicingtranscription

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Area of Science:

  • Molecular Biology
  • Gene Expression Regulation
  • Biochemistry

Background:

  • Transcription and splicing are essential for gene expression.
  • Established models of these processes are being challenged by new discoveries.
  • The carboxyl-terminal domain (CTD) of RNA polymerase II (Pol II) plays a regulatory role.

Purpose of the Study:

  • To investigate the timing and regulation of RNA splicing.
  • To explore the role of Pol II CTD phosphorylation in gene expression.
  • To understand emerging post-translational modifications of the CTD.

Main Methods:

  • Analysis of transcription and splicing dynamics.
  • Investigating Pol II CTD phosphorylation patterns.
  • Studying the impact of CTD modifications on gene expression.

Main Results:

  • Splicing occurs much faster than previously thought, coinciding with splice junction emergence.
  • Splicing is coupled to specific Pol II CTD phosphorylation patterns.
  • CTD phosphorylation may be less abundant than expected, with other modifications playing key roles.

Conclusions:

  • The established understanding of transcription-splicing coupling needs revision.
  • Pol II CTD phosphorylation represents a complex regulatory layer in gene expression.
  • Emerging CTD modifications offer new insights into gene expression control.