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Related Concept Videos

RNA Interference01:23

RNA Interference

RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
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...
RNA Interference01:23

RNA Interference

RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
piRNA - Piwi-interacting RNAs02:57

piRNA - Piwi-interacting RNAs

PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
Experimental RNAi02:15

Experimental RNAi

RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
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...

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Related Experiment Video

Updated: May 12, 2026

Chromatin Isolation by RNA Purification (ChIRP)
11:09

Chromatin Isolation by RNA Purification (ChIRP)

Published on: March 25, 2012

A long-distance relationship between RNAi and Polycomb.

Elissa P Lei1, Victor G Corces

  • 1Department of Biology, Johns Hopkins University, Baltimore, Maryland, 21218, USA.

Cell
|March 15, 2006
PubMed
Summary
This summary is machine-generated.

The RNA interference (RNAi) machinery is essential for physical interactions between chromosomes. This suggests RNAi plays a role in higher-order nuclear organization and gene regulation.

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Last Updated: May 12, 2026

Chromatin Isolation by RNA Purification (ChIRP)
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Published on: January 16, 2017

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11:01

RNA-Associated Chromatin DNA-DNA Interaction Method

Published on: April 30, 2026

Area of Science:

  • Molecular Biology
  • Genetics
  • Epigenetics

Background:

  • RNA interference (RNAi) pathways mediate sequence-specific transcriptional gene silencing at the chromatin level.
  • The Polycomb repressive complex (PRC) is involved in gene silencing and chromatin regulation.

Purpose of the Study:

  • To investigate the role of the RNAi machinery in chromosome interactions.
  • To explore the connection between RNAi, PRC, and nuclear organization.

Main Methods:

  • Utilized RNA interference (RNAi) pathways.
  • Studied the Polycomb repressive complex (PRC).
  • Investigated physical interactions between chromosomes.

Main Results:

  • The RNAi machinery is required for long-distance physical interactions between chromosomes.
  • These interactions are mediated by the Polycomb repressive complex (PRC).

Conclusions:

  • The RNAi machinery is implicated in regulating higher-order nuclear organization.
  • RNAi may influence genome structure and function beyond gene silencing.