Systematic inference of functional phosphorylation events in yeast metabolism

Yu Chen, Yonghong Wang, Jens Nielsen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Motivation: Protein phosphorylation is a post-translational modification that affects proteins by changing their structure and conformation in a rapid and reversible way, and it is an important mechanism for metabolic regulation in cells. Phosphoproteomics enables high-throughput identification of phosphorylation events on metabolic enzymes, but identifying functional phosphorylation events still requires more detailed biochemical characterization. Therefore, development of computational methods for investigating unknown functions of a large number of phosphorylation events identified by phosphoproteomics has received increased attention.Results: We developed a mathematical framework that describes the relationship between phosphorylation level of a metabolic enzyme and the corresponding flux through the enzyme. Using this framework, it is possible to quantitatively estimate contribution of phosphorylation events to flux changes. We showed that phosphorylation regulation analysis, combined with a systematic workflow and correlation analysis, can be used for inference of functional phosphorylation events in steady and dynamic conditions, respectively. Using this analysis, we assigned functionality to phosphorylation events of 17 metabolic enzymes in the yeast Saccharomyces cerevisiae, among which 10 are novel. Phosphorylation regulation analysis cannot only be extended for inference of other functional post-translational modifications but also be a promising scaffold formulti-omics data integration in systems biology.
Original languageEnglish
JournalBioinformatics
Volume33
Issue number13
Pages (from-to)1995-2001
ISSN1367-4803
DOIs
Publication statusPublished - 2017

Fingerprint Dive into the research topics of 'Systematic inference of functional phosphorylation events in yeast metabolism'. Together they form a unique fingerprint.

Cite this