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Nonsense-mediated mRNA Decay

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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.
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Nonsense-mediated mRNA Decay

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Related Experiment Video

Updated: May 21, 2026

Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins

Exploring Sequence Space to Identify Binding Sites for Regulatory RNA-Binding Proteins

Published on: August 9, 2019

PABPN1 shuts down alternative poly(A) sites.

Martine Simonelig¹

¹mRNA Regulation and Development, Institute of Human Genetics, CNRS UPR1142, Montpellier Cedex 5, France. Martine.Simonelig@igh.cnrs.fr

|May 30, 2012

Summary

This summary is machine-generated.

Alternative cleavage and polyadenylation (APA) is a key gene regulation mechanism. A new study shows poly(A)-binding protein nuclear 1 (PABPN1) suppresses alternative polyadenylation sites.

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Area of Science:

Molecular Biology
Gene Regulation
Biochemistry

Background:

Alternative cleavage and polyadenylation (APA) is a crucial post-transcriptional gene regulation process.
APA influences mRNA diversity and protein expression, impacting cellular functions.
Historically overlooked, APA is now recognized for its significant role in gene expression.

Purpose of the Study:

To investigate the role of poly(A)-binding protein nuclear 1 (PABPN1) in regulating alternative polyadenylation (APA).
To identify PABPN1 as a potential suppressor of alternative poly(A) sites.

Main Methods:

The study likely involved molecular biology techniques to analyze PABPN1 function.
Methods may include RNA sequencing, gene expression analysis, and protein-binding assays.

Main Results:

Poly(A)-binding protein nuclear 1 (PABPN1) was identified as a regulator of APA.
PABPN1 acts as a suppressor of alternative poly(A) sites, influencing mRNA processing.

Conclusions:

PABPN1 plays a significant role in controlling APA.
Understanding PABPN1's function in APA provides insights into gene regulation mechanisms.