PXD044142

PXD044142 is an original dataset announced via ProteomeXchange.

Title	Regulation of adaptive growth decisions via phosphorylation of the TRAPPII complex in Arabidopsis.
Description	Plants often adapt to adverse or stress conditions via differential growth. The trans-Golgi Network(TGN) has been implicated in stress responses, but it is not clear in what capacity it mediates adaptive growth decisions. In this study, we assess the role of the TGN in stress responses by exploring the interactome of the Transport Protein Particle II (TRAPPII) complex, required for TGN structure and function. Together with yeast-two-hybrid screens, this identified shaggy-like kinases (GSK3/AtSKs) as TRAPPII interactors. Kinase assays and pharmacological inhibition provided in vitro and in vivo evidence that AtSKs target the TRAPPII-specific subunit AtTRS120. We identified three GSK3/AtSK phosphorylation sites in AtTRS120. These sites were mutated, and the resulting AtTRS120 phosphovariants subjected to a variety of single and multiple stress conditions. The non-phosphorylatable TRS120 mutant exhibited enhanced adaptation to multiple stress conditions and to osmotic stress whereas the phosphomimetic version was less resilient. This suggests that the TRAPPII phosphostatus mediates adaptive responses to abiotic stress factors. AtSKs are multitaskers that integrate a broad range of signals. Similarly, the TRAPPII interactome is vast and considerably enriched in signaling components. An AtSK-TRAPPII interaction would integrate all levels of cellular organization and instruct the TGN, a central and highly discriminate cellular hub, as to how to mobilize and allocate resources to optimize growth and survival under limiting or adverse conditions.
HostingRepository	PanoramaPublic
AnnounceDate	2023-07-27
AnnouncementXML	Submission_2023-07-27_07:11:58.891.xml
DigitalObjectIdentifier
ReviewLevel	Non peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	supported by repository but incomplete data and/or metadata
PrimarySubmitter	Christina Ludwig
SpeciesList	scientific name: Arabidopsis thaliana; NCBI TaxID: 3702;
ModificationList	Phospho; Carbamidomethyl; Oxidation
Instrument	Q Exactive HF-X; Orbitrap Fusion Lumos

Revision	Datetime	Status	ChangeLog Entry
0	2023-07-27 07:02:01	ID requested
⏵ 1	2023-07-27 07:11:59	announced

Dataset with its publication pending

submitter keyword: TRAPPII, shaggy-like kinases, BRASSINOSTEROID INSENSITIVE 2 (BIN2), decision-making, growth trade-offs, light responses, water stress, adaptation, osmotic stress, additive stress, TGN, Arabidopsis

Christina Ludwig
contact affiliation	Bavarian Center for Biomolecular Mass Spectrometry (BayBioMS), TUM School of Life Sciences, Technical University of Munich, 85354 Freising, Germany
contact email	tina.ludwig@tum.de
lab head
Christina Ludwig
contact affiliation	Bavarian Center for Biomolecular Mass Spectrometry (BayBioMS), TUM School of Life Sciences, Technical University of Munich, 85354 Freising, Germany
contact email	tina.ludwig@tum.de
dataset submitter

Panorama Public dataset URI