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Related Experiment Video

Updated: Jan 20, 2026

Whole Mount Immunolabeling of Olfactory Receptor Neurons in the Drosophila Antenna
05:21

Whole Mount Immunolabeling of Olfactory Receptor Neurons in the Drosophila Antenna

Published on: May 4, 2014

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Olfactory receptor genes make the case for inter-chromosomal interactions.

Elizaveta Bashkirova1, Stavros Lomvardas2

  • 1Department of Biochemistry and Molecular Biophysics, Roy Vangelos Columbia University Medical Center, New York, NY 10032, United States.

Current Opinion in Genetics & Development
|September 7, 2019
PubMed
Summary

Specific inter-chromosomal contacts in the 3D genome are crucial for gene regulation. These interactions orchestrate olfactory receptor gene expression in olfactory sensory neurons (OSNs) and other biological systems.

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Related Experiment Videos

Last Updated: Jan 20, 2026

Whole Mount Immunolabeling of Olfactory Receptor Neurons in the Drosophila Antenna
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Published on: May 4, 2014

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Associated Chromosome Trap for Identifying Long-range DNA Interactions
14:49

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Area of Science:

  • Genomics
  • Cell Biology
  • Molecular Biology

Background:

  • The interphase nucleus partitions DNA into chromosome territories, limiting inter-chromosomal contacts.
  • Advanced genomic and imaging tools reveal specific, regulated inter-chromosomal interactions.
  • These interactions play critical roles in cellular functions, including gene regulation.

Purpose of the Study:

  • To review the role of inter-chromosomal interactions in olfactory receptor (OR) gene choice.
  • To explore other biological systems where inter-chromosomal interactions contribute to gene regulation.
  • To highlight the importance of 3D genome organization in gene expression.

Main Methods:

  • Analysis of 3D genome organization using genomic and imaging tools.
  • Investigating inter-chromosomal interactions in various cell types.
  • Reviewing existing literature on inter-chromosomal interactions and gene regulation.

Main Results:

  • Widespread inter-chromosomal interactions are central to chemosensation and olfactory receptor gene expression.
  • In olfactory sensory neurons (OSNs), enhancers coalesce to a multi-chromosomal hub for single OR allele expression.
  • Remaining OR genes converge into heterochromatic compartments for transcriptional silencing.

Conclusions:

  • Inter-chromosomal interactions are essential for the precise regulation of olfactory receptor gene choice.
  • These genomic interactions contribute to regulatory robustness and transcriptional diversification in various biological systems.
  • Understanding 3D genome organization is key to deciphering complex gene regulatory mechanisms.