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Arabidopsis RNA processing factor SERRATE regulates the transcription of intronless genes
Umeå University, Faculty of Science and Technology, Umeå Plant Science Centre (UPSC). Umeå University, Faculty of Science and Technology, Department of Plant Physiology.
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2018 (English)In: eLIFE, E-ISSN 2050-084X, Vol. 7, article id e37078Article in journal (Refereed) Published
Abstract [en]

Intron splicing increases proteome complexity, promotes RNA stability, and enhances transcription. However, introns and the concomitant need for splicing extend the time required for gene expression and can cause an undesirable delay in the activation of genes. Here, we show that the plant microRNA processing factor SERRATE (SE) plays an unexpected and pivotal role in the regulation of intronless genes. Arabidopsis SE associated with more than 1000, mainly intronless, genes in a transcription-dependent manner. Chromatin-bound SE liaised with paused and elongating polymerase II complexes and promoted their association with intronless target genes. Our results indicate that stress-responsive genes contain no or few introns, which negatively affects their expression strength, but that some genes circumvent this limitation via a novel SE-dependent transcriptional activation mechanism. Transcriptome analysis of a Drosophila mutant defective in ARS2, the metazoan homologue of SE, suggests that SE/ARS2 function in regulating intronless genes might be conserved across kingdoms.

Place, publisher, year, edition, pages
Elife Sciences Publications ltd , 2018. Vol. 7, article id e37078
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Biochemistry and Molecular Biology
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URN: urn:nbn:se:umu:diva-152270DOI: 10.7554/eLife.37078ISI: 000444379000001PubMedID: 30152752OAI: oai:DiVA.org:umu-152270DiVA, id: diva2:1252836
Available from: 2018-10-03 Created: 2018-10-03 Last updated: 2018-10-03Bibliographically approved

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Collani, SilvioSchmid, Markus

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