PXD054277

PXD054277 is an original dataset announced via ProteomeXchange.

Title	Characterization of Ksg1 protein kinase-dependent phosphoproteome in the fission yeast S. pombe
Description	Ksg1 is an essential protein kinase of the fission yeast S. pombe that belongs to the AGC kinase family and is homologous to the mammalian PDPK1 kinase. Previous studies have shown that Ksg1 functions in the nutrient-sensing TOR signaling pathway and is involved in the phosphorylation and activation of other AGC kinases, thereby affecting various downstream targets related to metabolism, cell division, stress response, and gene expression. To date, the molecular function of Ksg1 has been analyzed using its temperature sensitive mutants or mutants expressing its truncated isoforms, which are not always suitable for functional studies of Ksg1 and the identification of its targets. To overcome these limitations, we employed a chemical genetic strategy and used a conditional ksg1as mutant sensitive to an ATP analog. Combining this mutant with quantitative phosphoproteomics analysis, we identified 1986 phosphosites that were differentially phosphorylated when Ksg1as kinase was inhibited by an ATP analog. We found that proteins whose phosphorylation was dysregulated after inhibition of Ksg1as kinase were mainly represented by those involved in the regulation of cytokinesis, contractile ring contraction, cell division, septation initiation signaling cascade, intracellular protein kinase cascade, barrier septum formation, protein phosphorylation, intracellular signal transduction, cytoskeleton organization, cellular response to stimulus, or in RNA, ncRNA and rRNA processing. Importantly, proteins with significantly down-regulated phosphorylation were specifically enriched for R-X-X-S and R-X-R-X-X-S motifs, which are typical consensus substrate sequences for phosphorylation by the AGC family of kinases. The results of this study provide a basis for further analysis of the role of the Ksg1 kinase and its targets in S. pombe and may also be useful for studying Ksg1 orthologs in other organisms.
HostingRepository	PRIDE
AnnounceDate	2024-11-02
AnnouncementXML	Submission_2024-11-02_01:19:54.380.xml
DigitalObjectIdentifier	https://dx.doi.org/10.6019/PXD054277
ReviewLevel	Peer-reviewed dataset
DatasetOrigin	Original dataset
RepositorySupport	Supported dataset by repository
PrimarySubmitter	Peter Barath
SpeciesList	scientific name: Schizosaccharomyces pombe; NCBI TaxID: 4896;
ModificationList	phosphorylated residue; acetylated residue; iodoacetamide derivatized residue
Instrument	Orbitrap Exploris 480

Revision	Datetime	Status	ChangeLog Entry
0	2024-07-26 08:41:05	ID requested
⏵ 1	2024-11-02 01:19:55	announced

10.6019/PXD054277;

10.1016/j.bbrc.2024.150895;

Cipak L, Sivakova B, Bellova J, Danchenko M, Jurcik J, Cipakova I, Lalakova LO, Gregan J, Barath P, Characterization of Ksg1 protein kinase-dependent phosphoproteome in the fission yeast S. pombe. Biochem Biophys Res Commun, 736():150895(2024) [pubmed]

submitter keyword: Ksg1, kinase, S.pombe,phosphoproteome

Peter Barath
contact affiliation	Institute of Chemistry, Slovak Academy of Sciences
contact email	peter.barath@savba.sk
lab head
Peter Barath
contact affiliation	Institute of Chemistry, Slovak Academy of Sciences
contact email	peter.barath@savba.sk
dataset submitter

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PRIDE project URI

• PRIDE
  1. PXD054277
     1. Label: PRIDE project
     2. Name: Characterization of Ksg1 protein kinase-dependent phosphoproteome in the fission yeast S. pombe