Applied Microbiology and Biotechnology

, Volume 99, Issue 20, pp 8629–8641 | Cite as

Proteomic insights into metabolic adaptation to deletion of metE in Saccharopolyspora spinosa

  • Qi Yang
  • Yunlong Li
  • Huijun Yang
  • Jie Rang
  • Sijia Tang
  • Lian He
  • Li Li
  • Xuezhi Ding
  • Liqiu XiaEmail author
Genomics, transcriptomics, proteomics


Saccharopolyspora spinosa can produce spinosad as a major secondary metabolite, which is an environmentally friendly agent for insect control. Cobalamin-independent methionine synthase (MetE) is an important enzyme in methionine biosynthesis, and this enzyme is probably closely related to spinosad production. In this study, its corresponding gene metE was inactivated, which resulted in a rapid growth and glucose utilisation rate and almost loss of spinosad production. A label-free quantitative proteomics-based approach was employed to obtain insights into the mechanism by which the metabolic network adapts to the absence of MetE. A total of 1440 proteins were detected from wild-type and ΔmetE mutant strains at three time points: stationary phase of ΔmetE mutant strain (S1ΔmetE , 67 h), first stationary phase of wild-type strain (S1WT, 67 h) and second stationary phase of wild-type strain (S2WT, 100 h). Protein expression patterns were determined using an exponentially modified protein abundance index (emPAI) and analysed by comparing S1ΔmetE /S1WT and S1ΔmetE /S2WT. Results showed that differentially expressed enzymes were mainly involved in primary metabolism and genetic information processing. This study demonstrated that the role of MetE is not restricted to methionine biosynthesis but rather is involved in global metabolic regulation in S. spinosa.


Proteomics Saccharopolyspora spinosa metE Metabolism Spinosad biosynthesis 



This work was supported by the National Basic Research Program (973) of China (2012CB722301), the National High Technology Research and Development program (863) of China (2011AA10A203), the International Cooperation Project (0102011DFA32610) and the Cooperative Innovation Center of Engineering and New Products for Developmental Biology of Hunan Province (20134486).

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

253_2015_6883_MOESM1_ESM.pdf (2.2 mb)
ESM 1 (PDF 2237 kb)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Qi Yang
    • 1
  • Yunlong Li
    • 1
  • Huijun Yang
    • 1
  • Jie Rang
    • 1
  • Sijia Tang
    • 1
  • Lian He
    • 1
  • Li Li
    • 1
  • Xuezhi Ding
    • 1
  • Liqiu Xia
    • 1
    Email author
  1. 1.Hunan Provincial Key Laboratory of Microbial Molecular Biology-State Key Laboratory Breeding Base of Microbial Molecular Biology, College of Life ScienceHunan Normal UniversityChangshaChina

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