3 Biotech

, 9:179 | Cite as

Display of a sucrose isomerase on the cell surface of Yarrowia lipolytica for synthesis of isomaltulose from sugar cane by-products

  • Yuan Zheng
  • Zhipeng Wang
  • Xiaofeng Ji
  • Jun ShengEmail author
Original Article


Isomaltulose (α-d-glucopyranosyl-1,6-d-fructofuranose) is an important industrial and raw food material, which can be synthesised from the by-products of sugar cane processing through sucrose isomerization conversion. In this study, we constructed a surface display vector of sucrose isomerase from Pantoeadispersa (pSIase) by a glycosylphosphatidylinositol (GPI)-cell wall protein (CWP) anchor signal sequence and successfully displayed pSIase on the cell surface of Yarrowia lipolytica, thereby increasing the conversion efficiency of isomaltulose. The highest activity of the displayed pSIase reached 2910.3 U/g of cell dry weight. Compared with the free pSIase, the displayed enzyme showed good stability at a broad range of temperatures (20–45 °C). The half-life at 40 °C increased from 62 to 141 min and the deactivation constants (kd) reached 4.91 × 10−3 min−1. Using low-cost cane molasses as the substrate, the isomaltulose conversion rate remained at 85% even after 9 batches were processed, which is a highly desired outcome for industrial use.


Sugar cane Isomaltulose Sucrose isomerase Cell surface display 



This study was supported by the grants from Central Public interset Scientific Institution Basal Research Funds, CAFS (no. 2017GH07) and 2017 green manufacturing projects of china (no. Z135060009002).

Compliance with ethical standards

Conflict of interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.


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Copyright information

© King Abdulaziz City for Science and Technology 2019

Authors and Affiliations

  1. 1.Laboratory of Enzyme EngineeringYellow Sea Fisheries Research InstituteQingdaoPeople’s Republic of China

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