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Double-stranded telomeric DNA binding proteins: Diversity matters.

Filip Červenák1, Katarína Juríková1, Regina Sepšiová1

  • 1a Department of Genetics , Comenius University in Bratislava, Faculty of Natural Sciences , Bratislava , Slovakia.

Cell Cycle (Georgetown, Tex.)
|July 28, 2017
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Summary
This summary is machine-generated.

Telomere-binding proteins (TBPs) are vital for genomic stability, despite telomeres being a small genome fraction. Their diversity across species, especially in yeasts, highlights unique evolutionary paths for maintaining telomere function.

Keywords:
DNA-protein interactionsevolutionshelterintelomeretelomere-binding protein

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Area of Science:

  • Genetics
  • Molecular Biology
  • Evolutionary Biology

Background:

  • Telomeric sequences, though a small genome fraction, are critical for genomic stability.
  • Telomere-binding proteins (TBPs) recruit protein complexes to telomeres, mediating their function.
  • Nuclear telomere functions are conserved across eukaryotes, but TBPs show significant diversity.

Purpose of the Study:

  • To provide a historical overview of double-stranded (ds) TBP discoveries.
  • To illustrate the diversity of dsTBPs, even in related species.
  • To explore evolutionary hypotheses for dsTBP diversification.

Main Methods:

  • Literature review of TBP discoveries.
  • Comparative analysis of dsTBPs across taxa.
  • Speculative evolutionary modeling.

Main Results:

  • A historical compilation of known dsTBPs.
  • Examples showcasing TBP diversity in closely related species.
  • Identification of unique evolutionary trajectories for dsTBPs.

Conclusions:

  • Telomere-binding proteins exhibit remarkable diversity, particularly in ascomycetous yeasts.
  • This diversity suggests co-evolution with rapidly changing telomeric repeat sequences.
  • Understanding TBP evolution provides insights into maintaining genomic stability through varied molecular mechanisms.