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Single-Strand DNA Binding Proteins01:03

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For successful DNA replication, the unwinding of double-stranded DNA must be accompanied by stabilization and protection of the separated single strands of the DNA. This crucial task is performed by single-strand DNA-binding (SSB) proteins. They bind to the DNA in a sequence-independent manner, which means that the nitrogenous bases of the DNA need not be present in a specific order for binding of SSB proteins to it. The binding of SSB proteins straightens single-stranded DNA (ssDNA) and makes...
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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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Updated: Dec 7, 2025

Author Spotlight: Advanced Single-Molecule Techniques for Investigating Telomeric Protein-DNA Interactions
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Single-stranded DNA-binding proteins in plant telomeres.

Mei Luo1, Heng Luo2, Hui Li1

  • 1Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing 100083, China; College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China.

International Journal of Biological Macromolecules
|September 30, 2020
PubMed
Summary

Single-stranded DNA-binding proteins protect plant telomeres, influencing telomere length and telomerase activity. This review explores their protective mechanisms and development in plants.

Keywords:
PlantSingle-stranded DNA-binding proteinTelomeraseTelomere

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Area of Science:

  • Molecular Biology
  • Genetics
  • Plant Science

Background:

  • Telomeres protect eukaryotic chromosomal ends.
  • Single-stranded DNA-binding proteins (SSBs) are crucial for telomere maintenance.
  • Understanding plant telomere SSBs is vital for genomic stability.

Purpose of the Study:

  • To review the protective mechanisms of SSBs in plant telomeres.
  • To summarize the roles of plant SSBs in telomere length regulation.
  • To explore the influence of SSBs on plant telomerase activity.

Main Methods:

  • Literature review of existing research on plant telomere SSBs.
  • Analysis of studies on SSB function in telomere maintenance.
  • Synthesis of data on SSB interactions with telomere components.

Main Results:

  • Plant SSBs play a significant role in protecting telomeric single-stranded DNA.
  • SSBs influence telomere length maintenance and stability in plants.
  • These proteins interact with telomerase, affecting its activity.

Conclusions:

  • Plant telomere SSBs are essential for chromosomal end protection.
  • Further research into SSB mechanisms can reveal new insights into plant development and aging.
  • Targeting SSBs could offer novel strategies for plant biotechnology.