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Related Concept Videos

Chromatin Structure Regulates pre-mRNA Processing02:41

Chromatin Structure Regulates pre-mRNA Processing

In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
Regulation of Expression Occurs at Multiple Steps02:24

Regulation of Expression Occurs at Multiple Steps

Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Regulation of Expression Occurs at Multiple Steps02:24

Regulation of Expression Occurs at Multiple Steps

Gene expression can be regulated at almost every step from gene to protein. Transcription is the step that is most commonly regulated. This involves the binding of proteins to short regulatory sequences on the DNA. This association can either promote or inhibit the transcription of a gene associated with the respective sequence.
Transcription results in the generation of precursor (pre-mRNA) that consists of both exons and introns, which needs further processing before being translated to a...
Regulation of Expression at Multiple Steps01:23

Regulation of Expression at Multiple Steps

The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the addition of a...
Chromatin Structure and RNA Splicing02:41

Chromatin Structure and RNA Splicing

In eukaryotic cells, nascent mRNA transcripts need to undergo many post-transcriptional modifications to reach the cell cytoplasm and translate into functional proteins. For a long time, transcription and pre-mRNA processing were considered two independent events that occur sequentially in the cell. However, it has now been well established that transcription and pre-mRNA processing are two simultaneous processes that are precisely regulated inside the cell.
The chromatin structure, especially...
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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Monitoring Protein-RNA Interaction Dynamics In Vivo at High Temporal Resolution Using χCRAC
09:15

Monitoring Protein-RNA Interaction Dynamics In Vivo at High Temporal Resolution Using χCRAC

Published on: May 9, 2020

CBX3 regulates efficient RNA processing genome-wide.

Andrea Smallwood1, Gary C Hon, Fulai Jin

  • 1Ludwig Institute for Cancer Research, La Jolla, California 92093, USA.

Genome Research
|June 12, 2012
PubMed
Summary
This summary is machine-generated.

Chromatin protein CBX3 (HP1γ) binds active genes and aids in RNA processing. Its depletion impairs gene expression and splicing, revealing a novel role in cotranscriptional RNA processing.

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Area of Science:

  • Molecular Biology
  • Epigenetics
  • Gene Regulation

Background:

  • Chromatin proteins CBX5 (HP1α), CBX1 (HP1β), and CBX3 (HP1γ) are involved in heterochromatin formation and gene regulation.
  • Recent findings suggest CBX3 binds to gene bodies, but its broader role is unclear.

Purpose of the Study:

  • To investigate the genome-wide localization of CBX3 and its function in gene regulation and RNA processing.

Main Methods:

  • Genome-wide localization analysis (ChIP-seq implied)
  • CBX3 depletion experiments
  • Analysis of nascent transcripts and splicing factor recruitment

Main Results:

  • CBX3 binds to active gene regions across multiple cell types.
  • CBX3 depletion down-regulates a subset of target genes.
  • Loss of CBX3 causes accumulation of unspliced transcripts and defective splicing factor recruitment.

Conclusions:

  • CBX3 plays a significant role in facilitating efficient cotranscriptional RNA processing.
  • CBX3 is crucial for proper gene expression and splicing of specific target genes.