Related Experiment Video
Updated: Jun 4, 2026
11:40
Preparation of the Mgm101 Recombination Protein by MBP-based Tagging Strategy
Published on: June 25, 2013
Recombination proteins and telomere stability in plants
Simon Amiard1, Charles White, Maria Eugenia Gallego
1Génétique, Reproduction et Développement, UMR CNRS - Clermont Université - INSERM U, UFR Sciences et Technologies, Université Blaise Pascal, Aubière, France.
Current Protein & Peptide Science
|February 26, 2011
Summary
DNA repair proteins are crucial for maintaining genome integrity and telomere stability in plants. These proteins not only recognize telomere damage but also actively regulate telomere homeostasis, preventing genome instability.
Area of Science:
- Molecular Biology
- Genetics
- Plant Science
Background:
- Telomeres protect eukaryotic chromosome ends, and their dysfunction triggers DNA Damage Repair (DDR) responses.
- Telomere homeostasis is tightly regulated by various proteins, including those involved in DNA repair.
- Plants provide a unique model for studying DDR proteins due to their non-essential nature compared to vertebrates.
Purpose of the Study:
- To review plant telomere-specific proteins and their roles in genome maintenance.
- To explore the involvement of DDR processes and proteins in plant telomere stability.
- To focus on telomere signaling and recombination events arising from telomere dysfunction.
Main Methods:
- Review of current literature on plant telomere biology and DDR.
- Analysis of the roles of specific DNA repair and recombination proteins in telomere maintenance.
- Examination of telomere signaling pathways and their impact on genome stability.
Main Results:
- DNA damage repair proteins are surprisingly directly involved in plant telomere homeostasis.
- Telomere dysfunction activates DDR pathways, leading to senescence or cell death.
- Unprotected telomeres induce recombination, causing genome rearrangements and instability.
Conclusions:
- DNA repair proteins play a dual role in recognizing telomere damage and regulating telomere stability in plants.
- Understanding these mechanisms in plants can offer insights into genome integrity and disease.
- Further research into plant telomere signaling and DDR is essential for comprehending genome rearrangements.
Related Concept Videos
02:53Conservative Site-specific Recombination and Phase Variation
Because the DNA segments are cut and reorganized in a direction-specific manner, site-specific recombination has emerged as an efficient genetic engineering technique. Flippase and Cyclization recombinases or Flp and Cre, respectively, are two members of the tyrosine recombinase family derived from bacteriophages, that are used to mediate site-specific DNA insertions, deletions, and targeted expression of proteins in mammalian cell lines.
The recognition sites for Cre recombinase called LoxP...
The recognition sites for Cre recombinase called LoxP...
02:41Telomeres and Telomerase
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 DNA.
02:41Telomeres and Telomerase
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 DNA.
02:31Homologous Recombination
The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
02:31Homologous Recombination
The basic reaction of homologous recombination (HR) involves two chromatids that contain DNA sequences sharing a significant stretch of identity. One of these sequences uses a strand from another as a template to synthesize DNA in an enzyme-catalyzed reaction. The final product is a novel amalgamation of the two substrates. To ensure an accurate recombination of sequences, HR is restricted to the S and G2 phases of the cell cycle. At these stages, the DNA has been replicated already and the...
02:13Overview of Transposition and Recombination
Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...