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Area of Science:

  • Genomics
  • Molecular Biology
  • Cell Biology

Background:

  • The three-dimensional genome organization is crucial for gene regulation and genomic stability.
  • Chromosomal loci can interact, including "trans" interactions between loci on different chromosomes.

Purpose of the Study:

  • To describe an inducible trans interaction between specific DNA sequences in budding yeast chromosomes.
  • To investigate the mechanisms and constraints governing this inducible chromosomal interaction.

Main Methods:

  • Insertion of special DNA sequences into two ectopic chromosomal loci in trans.
  • Chromosome capture analysis (3C) to detect spatial proximity.
  • Epifluorescence microscopy in whole cells to visualize pairing.

Main Results:

  • Specific DNA sequences inserted at ectopic loci can pair in an inducible manner.
  • This pairing, indicating trans interaction, is observable via 3C and microscopy.
  • De novo protein synthesis is required for the inducible pairing process.

Conclusions:

  • Inducible trans interactions can be established between specific DNA sequences in yeast.
  • The three-dimensional organization of the yeast nucleus influences the probability of these interactions.