Related Experiment Video
Updated: Jul 15, 2025
10:28
Repressing Gene Transcription by Redirecting Cellular Machinery with Chemical Epigenetic Modifiers
Published on: September 20, 2018
6.5K
Soft repression and chromatin modification by conserved transcriptional corepressors
1Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, United States.
The Enzymes
|September 25, 2023
Summary
This review explores transcriptional repression in eukaryotes, focusing on "soft repression" where repressors subtly influence gene expression. It highlights genomic approaches for studying this less-understood regulatory mechanism.
Area of Science:
- Molecular Biology
- Genetics
- Gene Regulation
Background:
- Eukaryotic transcription involves DNA-binding factors and corepressors interacting with cellular machinery.
- Master regulatory switches are well-studied, but widely-expressed metabolic gene regulation, especially "soft repression," is less understood.
- Soft repression involves subtle influences of physically-interacting repressors and corepressors on gene expression.
Approach:
- This review synthesizes classic and current methodologies for studying transcriptional repression.
- It emphasizes the application of genomic approaches to uncover regulatory mechanisms.
- The review discusses the opportunities and challenges in studying soft repression.
Key Points:
- Transcriptional regulation is complex, involving multiple factors and interactions.
- Soft repression, a subtle form of gene regulation, is gaining attention.
- Genomic tools are crucial for advancing the study of soft repression.
Conclusions:
- Understanding soft repression is vital for comprehending gene regulation.
- Future research should leverage advanced genomic techniques to explore soft repression.
- This review provides a framework for future investigations into eukaryotic transcriptional control.
Related Concept Videos
02:04Co-activators and Co-repressors
7.4K
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
7.4K
01:52Eukaryotic Transcription Inhibitors
9.9K
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
9.9K
02:38Heterochromatin
13.8K
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions that take up more dye are called heterochromatin. Heterochromatin is further classified into two forms – constitutive heterochromatin and facultative heterochromatin.
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at...
Constitutive heterochromatin: It is a highly compact region of chromatin that is mostly concentrated in the centromere and telomere. Unlike euchromatin, the amino acid at...
13.8K
01:01Euchromatin
7.0K
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
7.0K
02:36RNA Polymerase II Accessory Proteins
9.2K
Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
9.2K
01:32Chromatin Modification in iPS Cells
1.7K
Chromatin modification alters gene expression; therefore, scientists can add histone-modifying enzymes, histone variants, and chromatin remodeling complexes to somatic cells to aid reprogramming into pluripotent stem (iPS) cells.
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
1.7K