TY - JOUR

T1 - Plant nonsense-mediated mRNA decay is controlled by different autoregulatory circuits and can be induced by an EJC-like complex

AU - Nyikó, Tünde

AU - Kerényi, Farkas

AU - Szabadkai, Levente

AU - Benkovics, Anna H.

AU - Major, Péter

AU - Sonkoly, Boglárka

AU - Mérai, Zsuzsanna

AU - Barta, Endre

AU - Niemiec, Emilia

AU - Kufel, Joanna

AU - Silhavy, Dániel

N1 - Funding Information: Hungarian Scientific Research Fund [OTKA K60102, C77086]; International Centre for Genetic Engineering and Biotechnology [ICGEB CRP/HUN09-01]. T.N. and L.S. were graduate students of the ELTE ‘Classical and Molecular Genetics’ PhD program. EMBO short term fellowship program (to T.N.) and the Marie-Curie [PIEFGA-2009-253075] fellowship program (to Z.M.). Funding for open access charge: Grants from Hungarian Scientific Research Fund [OTKA K60102, C77086 and ICGEB CRP/HUN09-01] will be used to pay for the publication charge.

PY - 2013/7

Y1 - 2013/7

N2 - Nonsense-mediated mRNA decay (NMD) is a eukaryotic quality control system that recognizes and degrades transcripts containing NMD cis elements in their 3′untranslated region (UTR). In yeasts, unusually long 3′UTRs act as NMD cis elements, whereas in vertebrates, NMD is induced by introns located >50 nt downstream from the stop codon. In vertebrates, splicing leads to deposition of exon junction complex (EJC) onto the mRNA, and then 3′UTR-bound EJCs trigger NMD. It is proposed that this intron-based NMD is vertebrate specific, and it evolved to eliminate the misproducts of alternative splicing. Here, we provide evidence that similar EJC-mediated intron-based NMD functions in plants, suggesting that this type of NMD is evolutionary conserved. We demonstrate that in plants, like in vertebrates, introns located >50 nt from the stop induces NMD. We show that orthologs of all core EJC components are essential for intron-based plant NMD and that plant Partner of Y14 and mago (PYM) also acts as EJC disassembly factor. Moreover, we found that complex autoregulatory circuits control the activity of plant NMD. We demonstrate that expression of suppressor with morphogenic effect on genitalia (SMG)7, which is essential for long 3′UTR- and intron-based NMD, is regulated by both types of NMD, whereas expression of Barentsz EJC component is downregulated by intron-based NMD.

AB - Nonsense-mediated mRNA decay (NMD) is a eukaryotic quality control system that recognizes and degrades transcripts containing NMD cis elements in their 3′untranslated region (UTR). In yeasts, unusually long 3′UTRs act as NMD cis elements, whereas in vertebrates, NMD is induced by introns located >50 nt downstream from the stop codon. In vertebrates, splicing leads to deposition of exon junction complex (EJC) onto the mRNA, and then 3′UTR-bound EJCs trigger NMD. It is proposed that this intron-based NMD is vertebrate specific, and it evolved to eliminate the misproducts of alternative splicing. Here, we provide evidence that similar EJC-mediated intron-based NMD functions in plants, suggesting that this type of NMD is evolutionary conserved. We demonstrate that in plants, like in vertebrates, introns located >50 nt from the stop induces NMD. We show that orthologs of all core EJC components are essential for intron-based plant NMD and that plant Partner of Y14 and mago (PYM) also acts as EJC disassembly factor. Moreover, we found that complex autoregulatory circuits control the activity of plant NMD. We demonstrate that expression of suppressor with morphogenic effect on genitalia (SMG)7, which is essential for long 3′UTR- and intron-based NMD, is regulated by both types of NMD, whereas expression of Barentsz EJC component is downregulated by intron-based NMD.

UR - http://www.scopus.com/inward/record.url?scp=84880534583&partnerID=8YFLogxK

U2 - 10.1093/nar/gkt366

DO - 10.1093/nar/gkt366

M3 - Journal article

C2 - 23666629

AN - SCOPUS:84880534583

VL - 41

SP - 6715

EP - 6728

JO - Nucleic Acids Research

JF - Nucleic Acids Research

SN - 0305-1048

IS - 13

ER -