Recent Posts

It takes two to tango: two GNOMs have to activate ARF1 together

Brumm et al. investigate how the protein GNOM activates dimers of the small GTPase ARF1 and inserts them very close to each other during vesicle formation. The Plant Cell (2020) https://doi.org/10.1105/tpc.20.00240 By Sabine Brumm 1,2 and Gerd Jürgens 1, ZMBP, University of Tübingen (1), Sainsbury…

How Do Plants Adapt to Dark and Bright Light Conditions?

Kimura et al. illuminate a molecular mechanism to allow germinating seedlings of Arabidopsis thaliana to adapt to dark and bright light conditions during hypocotyl phototropism.  Plant Cell https://doi.org/10.1105/tpc.19.00926 By Taro Kimura and Tatsuya Sakai; Graduate School of Science and Technology,…

Calcium signaling in senescence

Durian et al. searched for phosphorylation substrates of Arabidopsis CALCIUM DEPENDENT PROTEIN KINASE1 and found that it phosphorylates ORE1, a master regulator of senescence, demonstrating a link between calcium signaling and cell death.  Plant Cell https://doi.org/10.1105/tpc.19.00810 By Guido…

ASTREL Projection: Comparative Phylogenomics Uncovers Novel Genes Co-eliminated with the EDS1 Immune Pathway

The plant immune system is largely centered around immune receptors that monitor for pathogen-derived signatures. Extracellular immunity is afforded through cell-surface receptors recognizing common microbial motifs like bacterial flagellin or fungal chitin (Boutrot and Zipfel, 2017). By contrast, intracellular…

Cold-responsive Regulatory DNA Landscapes and Regulatory Networks in Grasses

Han et al. uncover regulatory DNA landscapes in root, stem, and leaf tissues of multiple grasses. Plant Cell https://doi.org/10.1105/tpc.19.00716   By Kai Wang and Jinlei Han Fujian Agriculture and Forestry University  Background: Low temperature is a major environmental stress that affects…

Shooting for the STARRs: A Modified STARR-seq Assay for Rapid Identification and Evaluation of Plant Regulatory Sequences in Tobacco Leaves

A single genome gives rise to different cell types and organs in response to precise temporal and spatial regulation of gene expression, driven by developmental and environmental cues. These expression patterns are orchestrated by cis-regulatory elements, distal enhancers and gene-proximal promoters.…

Glutelin mRNAs are transported on endosomes

Tian et al. identify the factors mediating localization of specific mRNAs in developing rice endosperm cells. Plant Cell https://doi.org/10.1105/tpc.20.00111  by Li Tian and Thomas W. Okita  Background: Localization of mRNAs is a universal mechanism to efficiently drive protein targeting in eukaryotes…

Secret Talents: STARCH SYNTHASE 5—Not an Enzyme, but Very Active!

Abt et al. found that Arabidopsis SS5, a protein homologous to typical starch-synthesizing enzymes, is itself enzymatically inactive, but rather has an important role in the starch granule initiation process. Plant Cell https://doi.org/10.1105/tpc.19.00946 By Melanie R. Abt and Samuel C. Zeeman, Institute…

Remodeling Chromatin in an ARID Environment

The control of gene expression is of fundamental importance for cellular life. In Eukaryotes, linear DNA is wrapped around nucleosomes that constitute a physical barrier to active transcription. Chromatin remodeling complexes modulate the composition, stability and positioning of nucleosomes therefore…