Mechanism of Nonsense-Mediated mRNA Decay Stimulation by Splicing Factor SRSF1

Aznarez, Isabel, Nomakuchi, Tomoki T., Tetenbaum-Novatt, Jaclyn, Rahman, Mohammad Alinoor, Fregoso, Oliver, Rees, Holly, Krainer, Adrian R. (May 2018) Mechanism of Nonsense-Mediated mRNA Decay Stimulation by Splicing Factor SRSF1. Cell Reports, 23 (7). pp. 2186-2198. ISSN 2211-1247

Abstract

Summary The splicing factor SRSF1 promotes nonsense-mediated mRNA decay (NMD), a quality control mechanism that degrades mRNAs with premature termination codons (PTCs). Here we show that transcript-bound SRSF1 increases the binding of NMD factor UPF1 to mRNAs while in, or associated with, the nucleus, bypassing UPF2 recruitment and promoting NMD. SRSF1 promotes NMD when positioned downstream of a PTC, which resembles the mode of action of exon junction complex (EJC) and NMD factors. Moreover, splicing and/or EJC deposition increase the effect of SRSF1 on NMD. Lastly, SRSF1 enhances NMD of PTC-containing endogenous transcripts that result from various events. Our findings reveal an alternative mechanism for UPF1 recruitment, uncovering an additional connection between splicing and NMD. SRSF1’s role in the mRNA’s journey from splicing to decay has broad implications for gene expression regulation and genetic diseases.

Item Type:	Paper
Uncontrolled Keywords:	NMD RNA splicing SRSF1 UPF1 EJC
Subjects:	bioinformatics bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification bioinformatics > genomics and proteomics > genetics & nucleic acid processing bioinformatics > genomics and proteomics bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > Alternative Splicing bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > exons bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > mRNA bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein expression > phosphorylation bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein expression bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > RNA splicing bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > transcription factor
CSHL Authors:	Krainer, Adrian R. Aznarez Da Silva, Isabel Nomakuchi, Tomoki Fregoso, Oliver I. Novatt, Jaclyn Rahman, Mohammad
Communities:	CSHL Cancer Center Program > Gene Regulation and Inheritance Program CSHL Cancer Center Shared Resources > Antibody and Phage Display Service CSHL labs > Krainer lab School of Biological Sciences > Publications CSHL Cancer Center Shared Resources > Animal Shared Resource
Depositing User:	Matt Covey
Date:	15 May 2018
Date Deposited:	21 May 2018 20:33
Last Modified:	06 Feb 2024 20:58
PMCID:	PMC5999336
Related URLs:	Publisher
URI:	https://repository.cshl.edu/id/eprint/36586

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