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Mol Cell. 2017 Jan 5;65(1):191-201. doi: 10.1016/j.molcel.2016.11.032. Epub 2016 Dec 22.

Fluorescence Amplification Method for Forward Genetic Discovery of Factors in Human mRNA Degradation.

Author information

1
Department of Molecular Biophysics and Biochemistry, Howard Hughes Medical Institute, Boyer Center for Molecular Medicine, Yale University School of Medicine, 295 Congress Avenue, New Haven, CT 06536, USA. Electronic address: andrei.alexandrov@yale.edu.
2
Department of Molecular Biophysics and Biochemistry, Howard Hughes Medical Institute, Boyer Center for Molecular Medicine, Yale University School of Medicine, 295 Congress Avenue, New Haven, CT 06536, USA.

Abstract

Nonsense-mediated decay (NMD) degrades mRNAs containing a premature termination codon (PTC). PTCs are a frequent cause of human genetic diseases, and the NMD pathway is known to modulate disease severity. Since partial NMD attenuation can potentially enhance nonsense suppression therapies, better definition of human-specific NMD is required. However, the majority of NMD factors were first discovered in model organisms and then subsequently identified by homology in human. Sensitivity and throughput limitations of existing approaches have hindered systematic forward genetic screening for NMD factors in human cells. We developed a method of in vivo amplification of NMD reporter fluorescence (Fireworks) that enables CRISPR-based forward genetic screening for NMD pathway defects in human cells. The Fireworks genetic screen identifies multiple known NMD factors and numerous human candidate genes, providing a platform for discovery of additional key factors in human mRNA degradation.

PMID:
28017590
PMCID:
PMC5301997
DOI:
10.1016/j.molcel.2016.11.032
[Indexed for MEDLINE]
Free PMC Article

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