G. Schaaf

Bacterial Pathogen Infection Triggers Magic Spot Nucleotide Signaling in Arabidopsis thaliana Chloroplasts Through Specific RelA/SpoT Homologs

This study uses CE-MS to measure (p)ppGpp levels in Arabidopsis thaliana during infection, showing increased ppGpp via RSH2/RSH3 and PAMP signaling.

Mechanisms by Which Small Molecule Inhibitors Arrest Sec14 Phosphatidylinositol Transfer Protein Activity

This study investigates how small molecule inhibitors affect Sec14 phosphatidylinositol transfer protein activity using structural analysis to inform antifungal drug design.

Phase Separation of a Nodulin Sec14-like protein Maintains Auxin Efflux Carrier Polarity at Arabidopsis Plasma Membranes

The paper shows that phase separation of SEC14-like protein, mediated by proteolysis, maintains auxin efflux carrier polarity at Arabidopsis plasma membranes, contributing to root developmental robustness.

Arabidopsis PFA-DSP-type phosphohydrolases target specific inositol pyrophosphate messengers

This study identifies Arabidopsis PFA-DSP proteins as specific inositol pyrophosphate phosphohydrolases, revealing their role in regulating these signaling molecules.

Arabidopsis inositol polyphosphate kinases IPK1 and ITPK1 modulate crosstalks between SA-dependent immunity and phosphate-starvation responses

This study shows that Arabidopsis IPK1 and ITPK1 modulate crosstalk between SA-dependent immunity and phosphate-starvation responses by affecting SA levels and PSI-gene expression.

Arabidopsis inositol polyphosphate kinases regulate COP9 signalosome deneddylase functions in phosphate-homeostasis

This study shows Arabidopsis InsP-kinases IPK1 and ITPK1 regulate CSN-CRL dynamics, affecting phosphate homeostasis and stress responses through deneddylation of cullins.

Analysis of Inositol Phosphate Metabolism by Capillary Electrophoresis Electrospray Ionization Mass Spectrometry (CE-ESI-MS)

This paper develops a CE-ESI-MS method to analyze inositol phosphates and pyrophosphates, revealing unknown synthesis pathways in mammals.

ITPK1 is an InsP6/ADP phosphotransferase that controls systemic phosphate homeostasis in Arabidopsis

This study shows ITPK1 generates PP-InsPs from InsP6 and regulates phosphate homeostasis in Arabidopsis by controlling InsP7 and InsP8 synthesis.

ITPK1-Dependent Inositol Polyphosphates Regulate Auxin Responses in Arabidopsis thaliana

This study shows that ITPK1 produces 5-InsP7, which binds to auxin receptors and influences plant growth responses.