Evaluation of multiple fused partners on enhancing soluble level of prenyltransferase NovQ in Escherichia coli

  • Wenfeng Ni
  • Hui Liu
  • Peng Wang
  • Li Wang
  • Xiaowen Sun
  • Han Wang
  • Genhai Zhao
  • Zhiming Zheng
Research Paper


To obtain the soluble production of recombinant NovQ, it has been constructed into the pET28a system. Unfortunately, NovQ was mostly accumulated as inclusion bodies and existed in insoluble fractions of E. coli cell lysate. Four partners, namely His6, TrxA, GST and MBP, were investigated in fusion expression and co-expression to achieve soluble expression in E. coli strains BL21 (DE3) and Rosetta™ (DE3). MBP fusion expression revealed a forceful function in enhancing solubility compared with others, in which the soluble protein was approximately 70% of the total cellular proteins in E. coli. Improvement of rare tRNA abundance promoted the yield of total recombinant protein and the expression level of soluble protein. Besides, one-step purification method was applied and the purity of recombinant protein obtained using Ni–NTA resin was over 90%, where soluble recombinant MBP-NovQ was cleaved using TEV protease in vitro. This method could be an ideal method for soluble expression of ABBA prenyltransferases in E. coli.


Prenyltransferase NovQ Soluble expression Maltose binding protein TEV protease 



This work was supported by the Key 863 Fund of China (2014AA021704), Key research and development plan of Anhui Province (1804b06020342), Natural Science Foundation of Anhui Province (1308085MA07 and 1608085QC46) and Major Projects of Science and Technology in Anhui Province (17030801036) “Development and Demonstration of Vitamin K2 Functional Food”.

Supplementary material

449_2018_2050_MOESM1_ESM.doc (615 kb)
Supplementary material 1 (DOC 615 KB)


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical ScienceChinese Academy of SciencesHefeiPeople’s Republic of China
  2. 2.University of Science and Technology of ChinaHefeiPeople’s Republic of China

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