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Related Concept Videos

Dosage Compensation02:50

Dosage Compensation

In animals, gender is determined by the number and type of sex chromosome. For example, human females have two X chromosomes, and males have one X and one Y chromosome, whereas C.elegans with one X chromosome is a male, and the one with two X chromosomes is a hermaphrodite.
In addition to sexual development, the X chromosome has genes involved in autosomal functions such as brain development and the immune system. Therefore, males and females with  distinct numbers of X chromosomes will have...
The Ratio of X Chromosome to Autosomes02:45

The Ratio of X Chromosome to Autosomes

In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.  
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...
The Y Chromosome Determines Maleness02:19

The Y Chromosome Determines Maleness

The Y chromosome is a sex chromosome found in several vertebrates and mammals, including humans. In addition to 22 pairs of autosomes, the human males have one X chromosome and one Y chromosome. In these organisms, the presence or absence of the Y chromosome determines the development of male traits.
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size. Today,...
Methods of Nuclear Reprogramming01:24

Methods of Nuclear Reprogramming

Nuclear reprogramming is a process of transforming one cell type into an unrelated cell type by epigenetic changes that alter the cell’s original gene expression pattern. Such epigenetic changes force cells to express a different set of genes, which play a significant role in inducing transformation into other cell types. Nuclear reprogramming offers applications in reproductive cloning for livestock propagation and regenerative medicine — developing patient-specific cells for injury repair.
Master Transcription Regulators02:23

Master Transcription Regulators

Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a  complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
Inheritance of Chromatin Structures03:17

Inheritance of Chromatin Structures

Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying DNA...

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Related Experiment Video

Updated: May 19, 2026

An Efficient Strategy for Generating Tissue-specific Binary Transcription Systems in Drosophila by Genome Editing
10:01

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Published on: September 19, 2018

Bromodomain-dependent stage-specific male genome programming by Brdt.

Jonathan Gaucher1, Fayçal Boussouar, Emilie Montellier

  • 1INSERM, U823, Université Joseph Fourier-Grenoble 1, Institut Albert Bonniot, Grenoble, France.

The EMBO Journal
|August 28, 2012
PubMed
Summary

Brdt is a key regulator in male germ cell differentiation, controlling gene expression during meiosis and genome packaging in spermatids. This BET factor orchestrates essential steps for male fertility.

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Published on: January 14, 2021

Area of Science:

  • Reproductive Biology
  • Molecular Biology
  • Epigenetics

Background:

  • Male germ cell differentiation involves complex meiotic divisions and chromatin remodeling.
  • The precise molecular mechanisms governing these transformations remain incompletely understood.
  • BET factors are epigenetic regulators implicated in various cellular processes.

Purpose of the Study:

  • To investigate the role of the BET factor Brdt in male germ cell differentiation.
  • To elucidate Brdt's function in regulating gene expression and genome packaging during spermatogenesis.

Main Methods:

  • Analysis of Brdt's expression and function during male meiosis and post-meiotic stages.
  • Investigating Brdt's interaction with chromatin and its role in histone acetylation.
  • Studying the impact of Brdt on testis-specific gene expression programs.

Main Results:

  • Brdt acts as a master regulator, controlling both meiotic divisions and post-meiotic genome repackaging.
  • Activated Brdt drives a testis-specific gene expression program and represses progenitor cell genes.
  • Brdt's bromodomain directs histone replacement by transition proteins, crucial for genome condensation.

Conclusions:

  • Brdt is essential for male germ cell differentiation, orchestrating gene expression and genome packaging.
  • The study highlights Brdt's unique dual role in regulating spermatogenesis through distinct domains.
  • Brdt's function is critical for male fertility, ensuring proper development and genome integrity.