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Related Concept Videos

Types of RNA01:23

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Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
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Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
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RNA Interference01:23

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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.
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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...
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lncRNA - Long Non-coding RNAs02:39

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In humans, more than 80% of the genome gets transcribed. However, only around 2% of the genome codes for proteins. The remaining part produces non-coding RNAs which includes ribosomal RNAs, transfer RNAs, telomerase RNAs, and regulatory RNAs, among other types. A large number of regulatory non-coding RNAs have been classified into two groups depending upon their length – small non-coding RNAs, such as microRNA, which are less than 200 nucleotides in length, and long non-coding RNA...
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Updated: Apr 14, 2026

Osmotic Avoidance in Caenorhabditis elegans: Synaptic Function of Two Genes, Orthologues of Human NRXN1 and NLGN1, as Candidates for Autism
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E. coli OxyS non-coding RNA does not trigger RNAi in C. elegans.

Alper Akay1,2, Peter Sarkies1,2, Eric A Miska1,2

  • 1Wellcome Trust Cancer Research UK Gurdon Institute, University of Cambridge, Tennis Court Rd, Cambridge CB2 1QN, UK.

Scientific Reports
|April 16, 2015
PubMed
Summary
This summary is machine-generated.

Environmental RNA interference (RNAi) in C. elegans remains a mystery. This study found that E. coli OxyS non-coding RNA does not trigger the C. elegans RNAi pathway, suggesting other environmental RNAs are involved.

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Area of Science:

  • Molecular Biology
  • Genetics
  • RNA Biology

Background:

  • RNA interference (RNAi) is crucial in C. elegans research and therapeutics.
  • Organisms like nematodes uptake environmental double-stranded RNA (dsRNA) for RNAi, but its function is unknown.
  • E. coli OxyS non-coding RNA was previously suggested to regulate C. elegans gene expression.

Purpose of the Study:

  • To investigate if E. coli OxyS non-coding RNA triggers the C. elegans RNAi pathway.
  • To clarify the biological role of environmental RNA uptake in C. elegans.

Main Methods:

  • Sequencing of small RNAs from C. elegans.
  • Feeding C. elegans with bacteria engineered to express E. coli OxyS non-coding RNA.

Main Results:

  • The E. coli OxyS non-coding RNA was clearly demonstrated not to trigger an RNAi response in C. elegans.
  • No significant RNAi pathway activation was observed due to OxyS RNA exposure.

Conclusions:

  • The hypothesis that E. coli OxyS non-coding RNA triggers C. elegans RNAi is refuted.
  • The biological mechanisms underlying environmental RNAi in C. elegans require further investigation.