Integration of lipidomic and transcriptomic profiles reveals novel genes and regulatory mechanisms of Schizochytrium sp. in response to salt stress

Jia Yi Jiang, Siyu Zhu, Yuting Zhang, Xiaoman Sun, Xuechao Hu, He Huang, Lu Jing Ren

Research output: Contribution to journalArticlepeer-review

41 Scopus citations

Abstract

In this study, the effects of salt stress on the physiological, lipidomic and transcriptomic profiles of halophilic microalga Schizochytrium sp. were investigated. In general, Schizochytrium sp. could survive under high osmotic fermentation medium containing 30 g/L NaCl, and showed a significant increase in C14:0 percentage in total fatty acids. In lipidomic analysis, C14:0 was specifically enriched in phosphatidylcholine (PC), and membrane phospholipids participated in the salt stress response mostly. Specially, one novel signal lipid N-acylphosphatidylethanolamine (NAPE) (18:0/20:3/14:0) was upregulated significantly. Transcriptomic analysis revealed glycerol-3-phosphate acyltransferase (GPAT) and phospholipase ABHD3 (PLABDH3) were involved in C14:0 metabolism and NAPE biosynthesis. Signalling pathways they mediated were activated as evident by high expression level of Myristoyl-CoA: protein N-myristoyltransferase (NMT) and NAPE-hydrolyzing PLD (NAPE-PLD). This study gives us an insight in specific responses to salt stress in Schizochytrium sp. and provides a considerable proportion of novel genes that could commendably be used for engineering modification.

Original languageEnglish
Article number122231
JournalBioresource Technology
Volume294
DOIs
StatePublished - Dec 2019

Keywords

  • Acyltransferas
  • Halophile
  • Lipidomics
  • N-acylphosphatidylethanolamine
  • Schizochytrium sp.
  • Transcriptomics

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