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Telomeres and Telomerase02:41

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In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded...
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Semi-quantitative Detection of RNA-dependent RNA Polymerase Activity of Human Telomerase Reverse Transcriptase Protein
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Semi-quantitative Detection of RNA-dependent RNA Polymerase Activity of Human Telomerase Reverse Transcriptase Protein

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New perspectives on telomerase RNA structure and function.

Cherie Musgrove1, Linnea I Jansson2, Michael D Stone3,4

  • 1Department of Microbiology and Environmental Toxicology, University of California, Santa Cruz, CA, USA.

Wiley Interdisciplinary Reviews. RNA
|November 11, 2017
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This summary is machine-generated.

Telomerase ribonucleoprotein (RNP) complexes use RNA not only as a template but also for crucial structural and mechanistic roles in protecting chromosome ends. Recent studies in ciliates, yeast, and vertebrates reveal RNA

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Area of Science:

  • RNA Biology
  • Molecular Genetics
  • Biochemistry

Background:

  • Telomerase is a ribonucleoprotein (RNP) essential for maintaining chromosome integrity by adding repetitive DNA sequences to telomeres.
  • It functions as a reverse transcriptase (RT) using an intrinsic RNA component as a template.
  • The telomere, along with associated proteins, protects chromosome ends from degradation and DNA repair.

Purpose of the Study:

  • To review recent findings on the multifaceted roles of telomerase RNA beyond its template function.
  • To highlight how new insights from model systems are reshaping the understanding of telomerase RNP structure and mechanism.
  • To underscore the broad impact of telomerase RNA research on the broader field of functional RNAs.

Main Methods:

  • Review of recent scientific literature.
  • Analysis of findings from studies in ciliates, yeast, and vertebrates.
  • Synthesis of structural and mechanistic data related to telomerase RNA.

Main Results:

  • Telomerase RNA possesses diverse functions critical to telomerase RNP complex assembly and activity.
  • Structural and mechanistic studies reveal RNA's integral role in telomere maintenance beyond templating.
  • Comparative analysis across model systems (ciliates, yeast, vertebrates) illuminates conserved and divergent RNA functions.

Conclusions:

  • Telomerase RNA is a key functional component of the telomerase RNP, essential for its structure and mechanism.
  • Understanding telomerase RNA's diverse roles provides insights into RNA's broader biological significance.
  • Further research into telomerase RNA structure and function has wide-ranging implications for RNA biology and evolution.