Abstract：
:Nonsense-mediated decay (NMD) is a surveillance system that degrades mRNAs containing a premature termination codon (PTC) and plays important roles in protein homeostasis and disease. The efficiency of NMD is variable, impacting the clinical outcome of genetic mutations. However, limited resolution of bulk analyses has hampered the study of NMD efficiency. Here, we develop an assay to visualize NMD of individual mRNA molecules in real time. We find that NMD occurs with equal probability during each round of translation of an mRNA molecule. However, this probability is variable and depends on the exon sequence downstream of the PTC, the PTC-to-intron distance, and the number of introns both upstream and downstream of the PTC. Additionally, a subpopulation of mRNAs can escape NMD, further contributing to variation in NMD efficiency. Our study uncovers real-time dynamics of NMD, reveals key mechanisms that influence NMD efficiency, and provides a powerful method to study NMD.
journal_name
Mol Celljournal_title
Molecular cellauthors
Hoek TA,Khuperkar D,Lindeboom RGH,Sonneveld S,Verhagen BMP,Boersma S,Vermeulen M,Tanenbaum MEdoi
10.1016/j.molcel.2019.05.008subject
Has Abstractpub_date
2019-07-25 00:00:00pages
324-339.e11issue
2eissn
1097-2765issn
1097-4164pii
S1097-2765(19)30361-2journal_volume
75pub_type
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