title: Lysine Malonylome May Affect the Central Metabolism and Erythromycin Biosynthesis Pathway in Saccharopolyspora erythraea.
abstract: Lysine acylation is a dynamic, reversible post-translational modification that can regulate cellular and organismal metabolism in bacteria. Acetylome has been studied well in bacteria. However, to our knowledge, there are no proteomic data on the lysine malonylation in prokaryotes, especially in actinomycetes, which are the major producers of therapeutic antibiotics. In our study, the first malonylome of the erythromycin-producing Saccharopolyspora erythraea was described by using a high-resolution mass spectrometry-based proteomics approach and high-affinity antimalonyllysine antibodies. We identified 192 malonylated sites on 132 substrates. Malonylated proteins are enriched in many biological processes such as protein synthesis, glycolysis and gluconeogenesis, the TCA cycle, and the feeder metabolic pathways of erythromycin synthesis according to GO analysis and KEGG pathway analysis. A total of 238 S/T/Y/H-phosphorylated sites on 158 proteins were also identified in our study, which aimed to explore the potential cross-talk between acylation and phosphorylation. After that, site-specific mutations showed that malonylation is a negative regulatory modification on the enzymatic activity of the acetyl-CoA synthetase (Acs) and glutamine synthetase (Gs). Furthermore, we compared the malonylation levels of the two-growth state to explore the potential effect of malonylation on the erythromycin biosynthesis. These findings expand our current knowledge of the actinomycetes malonylome and supplement the acylproteome databases of the whole bacteria.
authors.affiliation: Lab of Biosystems and Microanalysis, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology , Shanghai 200237, China.
authors.forename: Jun-Yu
authors.initials: JY
authors.lastname: Xu
authors.affiliation: Lab of Biosystems and Microanalysis, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology , Shanghai 200237, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Xu
authors.affiliation: Lab of Biosystems and Microanalysis, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology , Shanghai 200237, China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: Lab of Biosystems and Microanalysis, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology , Shanghai 200237, China.|School of Chemistry and Chemical Engineering, Shihezi University , Xinjiang 832000, China.
authors.forename: Bang-Ce
authors.initials: BC
authors.lastname: Ye
mesh_terms: D053898:Biosynthetic Pathways; D004917:Erythromycin / Q000096:biosynthesis*; D008239:Lysine / Q000378:metabolism*; D008314:Malonates / Q000378:metabolism*; D008660:Metabolism; D011499:Protein Processing, Post-Translational; D040901:Proteomics / Q000379:methods; D016930:Saccharopolyspora / Q000378:metabolism*
chemical_list: D008314:Malonates; D004917:Erythromycin; C030290:malonic acid; D008239:Lysine
keywords: Saccharopolyspora erythraea; actinomycetes; malonylome; phosphorylome; post-translational modification; protein acylation