Profiling of the early nitrogen stress response in the diatom phaeodactylum tricornutum reveals a novel family of RING-Domain Transcription Factors<sup>1[OPEN]</sup>

Publication Type:
Journal Article
Citation:
Plant Physiology, 2016, 170 (1), pp. 489 - 498
Issue Date:
2016-01-01
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© 2016 American Society of Plant Biologists. All Rights Reserved. Diatoms often inhabit highly variable habitats where they are confronted with a wide variety of stresses, frequently including starvation of nutrients such as nitrogen. In this study, the transcriptome of the model diatom Phaeodactylum tricornutum was profiled during the onset of nitrogen starvation by RNA sequencing, and overrepresented motifs were determined in promoters of genes that were early and strongly up-regulated during the nitrogen stress response. One of these motifs could be bound by a nitrogen starvation-inducible RING-domain protein termed RING-GAF-Gln-containing protein (RGQ1), which was shown to act as a transcription factor and belongs to a previously uncharacterized family that is conserved in heterokont algae.
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