The Zinc-Finger Protein SOP1 Is Required for a Subset of the Nuclear Exosome Functions in Arabidopsis

A - Papers appearing in refereed journals

Hematy, K., Bellec, Y., Podicheti, R., Bouteiller, N., Anne, P., Morineau, C., Haslam, R. P., Beaudoin, F., Napier, J. A., Mockaitis, K., Gagliardi, D., Vaucheret, H., Lange, H. and Faure, J. D. 2016. The Zinc-Finger Protein SOP1 Is Required for a Subset of the Nuclear Exosome Functions in Arabidopsis. PLOS Genetics. 12 (2), p. e1005817.

AuthorsHematy, K., Bellec, Y., Podicheti, R., Bouteiller, N., Anne, P., Morineau, C., Haslam, R. P., Beaudoin, F., Napier, J. A., Mockaitis, K., Gagliardi, D., Vaucheret, H., Lange, H. and Faure, J. D.
Abstract

Correct gene expression requires tight RNA quality control both at transcriptional and post-transcriptional levels. Using a splicing-defective allele of PASTICCINO2 (PAS2), a gene essential for plant development, we isolated suppressor mutations modifying pas2-1 mRNA profiles and restoring wild-type growth. Three suppressor of pas2 (sop) mutations modified the degradation of mis-spliced pas2-1 mRNA species, allowing the synthesis of a functional protein. Cloning of the suppressor mutations identified the core subunit of the exosome SOP2/RRP4, the exosome nucleoplasmic cofactor SOP3/HEN2 and a novel zinc-finger protein SOP1 that colocalizes with HEN2 in nucleoplasmic foci. The three SOP proteins counteract post-transcriptional (trans)gene silencing (PTGS), which suggests that they all act in RNA quality control. In addition, sop1 mutants accumulate some, but not all of the misprocessed mRNAs and other types of RNAs that are observed in exosome mutants. Taken together, our data show that SOP1 is a new component of nuclear RNA surveillance that is required for the degradation of a specific subset of nuclear exosome targets. [Correction available at https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pg...]

Year of Publication2016
JournalPLOS Genetics
Journal citation12 (2), p. e1005817
Digital Object Identifier (DOI)doi:10.1371/journal.pgen.1005817
Open accessPublished as ‘gold’ (paid) open access
Funder project or codeDesigning Seeds for Nutrition and Health (DS)
*Design Oilseeds (Olga Sayanova)
Publisher's version
Output statusPublished
Publication dates
Online01 Feb 2016
Publication process dates
Accepted28 Dec 2015
Copyright licenseCC BY
PublisherPublic Library of Science (PLOS)
ISSN1553-7404

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