Recent Posts

Twin-Positive Motifs Function as Specific Plastid Targeting Signals

Precise trafficking of proteins to their proper destinations in the cell, whether to an organelle, a membrane, or the cytoplasm, is required for optimal cellular function. Because most plastid proteins are nucleus-encoded and translated in the cytoplasm, proper targeting and import relies on the presence…

Exosome-Deficient Mutants Reveal Rare Promoter Upstream Transcripts (PROMPTs) in Arabidopsis

In eukaryotes and archaea, protein-coding DNA is transcribed to messenger RNA (mRNA) via a preinitiation complex (PIC) composed of over 100 proteins, among them regulatory proteins, numerous transcription factors, and RNA polymerase II—the enzyme that produces precursor messenger RNA (pre-mRNA). Although…

Recognizing Plant Cell authors: Peng Zhou

Peng Zhou, first author of Meta Gene Regulatory Networks in Maize Highlight Functionally Relevant Regulatory Interactions Current Position: Post-doctoral Associate in Dr. Nathan Springer lab at the University of Minnesota Education: Ph.D. (Plant Pathology) in University of Minnesota; M.Sc. (Forensic…

RNA polymerase II transcription: cleave to elongate

Antosz et al. show that the ability of RNA polymerase II to cleave transcripts is required for proper transcription and plant growth. Wojciech Antosz and Klaus Grasser, University of Regensburg https://doi.org/10.1105/tpc.19.00891   Background: In plants as in other eukaryotes, nuclear…

Recognizing Plant Cell authors: Lucas McKinnon

Lucas McKinnon, first author of Membrane Chaperoning of a Thylakoid Protease whose structural stability is modified by the Protonmotive force Current Position: PhD candidate at University of California, Davis Education: PhD in Plant Biology (expected March 2020), B.S. in Biological Sciences (UC Davis,…

Phosphorus sensing in Chlamydomonas by TORC1 subunit LST8

Couso et al. developed a TOR kinase assay for Chlamydomonas and show how subunit LST8 senses phosphorus availability and modulates cell growth. Plant Cell https://doi.org/10.1105/tpc.19.00179 By I. Couso, M.E. Pérez-Pérez, M.M. Ford, E. Martínez-Force, L.M. Hicks, J.G. Umen, and J.L. Crespo. Background:…

The Arabidopsis GPT1 transporter is Essential in Both Plastids and Peroxisomes

Baune et al. explore the roles of a metabolite transporter in two different locations in a single cell. Plant Cell https://doi.org/10.1105/tpc.19.00959  By Marie-Christin Baune, Hannes Lansing, Antje von Schaewen University of Münster, Germany   Background: The oxidative pentose-phosphate…

The Way Out: A Transcriptionally Unique Group of Endosperm Cells Implicated in Nutrient Export to the Embryo

Successful development of the maize (Zea mays) kernel requires proper nutrient transport and signaling among its genetically distinct components: the embryo that gives rise to the next generation, the endosperm that nourishes the embryo, and the maternal tissues that surround the embryo and the endosperm…

Regulation of Carotenoid Pigmentation in Flowers

Stanley et al. Identify a protein in the model plant monkeyflower (Mimulus) required for chromoplast development and carotenoid biosynthesis. Plant Cell https://doi.org/10.1105/tpc.19.00755  By Lauren Stanley and Yao-Wu Yuan, University of Connecticut  Background: Carotenoids are yellow, orange,…