Expanding of Phospholipid:Diacylglycerol AcylTransferase (PDAT) from Saccharomyces cerevisiae as Multifunctional Biocatalyst with Broad Acyl Donor/Acceptor Selectivity

  • Yanbin Feng
  • Yunxiu Zhang
  • Wei Ding
  • Peichun Wu
  • Xupeng CaoEmail author
  • Song XueEmail author


Triacylglycerols are considered one of the most promising feedstocks for biofuels. Phospholipid:diacylglycerol acyltransferase (PDAT), responsible for the last step of triacylglycerol synthesis in the acyl-CoA-independent pathway, has attracted much attention by catalyzing membrane lipid transformation. However, due to lack of biochemical and enzymatic studies, PDAT has not carried forward in biocatalyst application. Here, the PDAT from Saccharomyces cerevisiae was expressed in Pichia pastoris. The purified enzymes were studied using different acyl donors and acceptors by thin layer chromatography and gas chromatography. In addition of the preferred acyl donor of PE and PC, the results identified that ScPDAT was capable of using broad acyl donors such as PA, PS, PG, MGDG, DGDG, and acyl-CoA, and ScPDAT was more likely to use unsaturated acyl donors comparing 18:0/18:1 to 18:0/18:0 phospholipids. With regard to acyl acceptors, ScPDAT preferred 1,2 to 1,3-diacylglycerol (DAG), while 12:0/12:0 DAG was identified as the optimal acyl acceptor, followed by 18:1/18:1 and 18:1/16:0 DAG. Additionally, ScPDAT reveals esterification activity that can utilize methanol as acyl acceptor to generate fatty acid methyl esters. The results fully expand the enzymatic selectivity of ScPDAT and provide fundamental knowledge for synthesis of triacylglycerol-derived biofuels.


Acyltransferase PDAT Acyl donor Biocatalyst Enzyme Acyl acceptor 


Author Contributions

SX designed most of the experiments, analyzed the results, and wrote the manuscript. YF conducted most of the experiments, analyzed the results, and wrote the manuscript. XC analyzed the results and provided the useful suggestions for paper. YZ, WD, and PW conducted the experiments.

Funding Information

This study was financially supported by the National Natural Science Foundation of China (No. 21576253, No. 21877110 and No. 31470432).

Compliance with Ethical Standards

Competing Interests

The authors declare that they have no conflict of interest.


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina

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