Related Experiment Video

Updated: May 16, 2026

Quantitative Detection of DNA-Protein Crosslinks and Their Post-Translational Modifications
10:12

Quantitative Detection of DNA-Protein Crosslinks and Their Post-Translational Modifications

Published on: April 21, 2023

Deadenylation and P-bodies

Chyi-Ying A Chen1, Ann-Bin Shyu

  • 1Department of Biochemistry and Molecular Biology, The University of Texas Medical School, Houston, TX 77030, USA.

Advances in Experimental Medicine and Biology
|December 11, 2012
PubMed

Insights

Deadenylation, the removal of poly(A) tails, is crucial for mRNA decay and translation inhibition. This process is essential for mRNA-protein complex remodeling and the formation of processing bodies (P-bodies) in eukaryotic cells.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Gene Expression Regulation

Background:

  • Deadenylation is a key step in mRNA decay, leading to translation inhibition.
  • Processing bodies (P-bodies) are cellular compartments that sequester translationally silenced messenger ribonucleoprotein complexes (mRNPs).

Purpose of the Study:

  • To investigate the role of deadenylation in mRNA decay and P-body formation.
  • To illustrate how deadenylation regulates gene expression through mRNP remodeling.

Main Methods:

  • Review of existing literature and experimental evidence on deadenylation and P-body dynamics.
  • Analysis of various examples demonstrating the link between deadenylation and mRNP fate.

Main Results:

  • Deadenylation is consistently the initial and necessary step in mRNA decay pathways.
  • This process facilitates the mRNP remodeling required for P-body assembly.
  • Evidence suggests deadenylation is indispensable for both the structure and function of P-bodies.

Conclusions:

  • Deadenylation is not merely a preparatory step for mRNA decay but actively participates in P-body formation and regulation.
  • Deadenylases play a critical structural and functional role in P-body dynamics.
  • The study highlights the central role of deadenylation in controlling gene expression via mRNA silencing and P-body localization.

More Related Videos

DNAzyme-dependent Analysis of rRNA 2’-O-Methylation09:12

DNAzyme-dependent Analysis of rRNA 2’-O-Methylation

Published on: September 16, 2019

Single-step Purification of Macromolecular Complexes Using RNA Attached to Biotin and a Photo-cleavable Linker08:12

Single-step Purification of Macromolecular Complexes Using RNA Attached to Biotin and a Photo-cleavable Linker

Published on: January 3, 2019

Related Concept Videos

mRNA Stability and Gene Expression02:51

mRNA Stability and Gene Expression

The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
Pre-mRNA Processing: Modification of pre-mRNA Ends01:35

Pre-mRNA Processing: Modification of pre-mRNA Ends

In eukaryotic cells, transcripts made by RNA polymerase are modified and processed before exiting the nucleus. Unprocessed RNA is called precursor mRNA or pre-mRNA to distinguish it from mature mRNA.
Once about 20-40 ribonucleotides have been joined together by RNA polymerase, a group of enzymes adds a cap to the 5' end of the growing transcript. In this process, a 5' phosphate is replaced by modified guanosine that has a methyl group attached (7-methyl guanosine). This 5' cap helps the cell...
Nonsense-mediated mRNA Decay02:27

Nonsense-mediated mRNA Decay

The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
Nonsense-mediated mRNA Decay02:27

Nonsense-mediated mRNA Decay

The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
RNA Editing02:23

RNA Editing

RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
Transcription Attenuation in Prokaryotes02:42

Transcription Attenuation in Prokaryotes

Transcriptional attenuation occurs when RNA transcription is prematurely terminated due to the formation of a terminator mRNA hairpin structure.  Bacteria use these hairpins to regulate the transcription process and control the synthesis of several amino acids including histidine, lysine, threonine, and phenylalanine. Transcription attenuation takes place in the non-coding regions of mRNA.
There are several different mechanisms used to attenuate transcription. In ribosome mediated...