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Applied Microbiology and Biotechnology

, Volume 100, Issue 21, pp 9393–9405 | Cite as

Metabolic engineering of the oleaginous yeast Rhodosporidium toruloides IFO0880 for lipid overproduction during high-density fermentation

  • Shuyan Zhang
  • Masakazu Ito
  • Jeffrey M. Skerker
  • Adam P. Arkin
  • Christopher V. RaoEmail author
Bioenergy and biofuels

Abstract

Natural lipids can be used to make biodiesel and many other value-added compounds. In this work, we explored a number of different metabolic engineering strategies for increasing lipid production in the oleaginous yeast Rhodosporidium toruloides IFO0880. These included increasing the expression of enzymes involved in different aspects of lipid biosynthesis—malic enzyme (ME), pyruvate carboxylase (PYC1), glycerol-3-P dehydrogenase (GPD), and stearoyl-CoA desaturase (SCD)—and deleting the gene PEX10, required for peroxisome biogenesis. Only malic enzyme and stearoyl-CoA desaturase, when overexpressed, were found to significantly increase lipid production. Only stearoyl-CoA desaturase, when overexpressed, further increased lipid production in a strain previously engineered to overexpress acetyl-CoA carboxylase (ACC1) and diacylglycerol acyltransferase (DGA1). Our best strain produced 27.4 g/L lipid with an average productivity of 0.31 g/L/h during batch growth on glucose and 89.4 g/L lipid with an average productivity of 0.61 g/L/h during fed-batch growth on glucose. These results further establish R. toruloides as a platform organism for the production of lipids and potentially other lipid-derived compounds from sugars.

Keywords

Oleaginous yeast Lipids Metabolic engineering Rhodosporidium toruloides 

Notes

Compliance with ethical standards

Funding

This work was supported by the Energy Biosciences Institute Grants OO7G02 (A.P.A) and OO3G18 (C.V.R.). The funder had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Conflict of interest

The authors declare that they have no conflict of interest.

Ethical statement

This article does not contain any studies with human participants or animals performed by any of the authors.

Supplementary material

253_2016_7815_MOESM1_ESM.pdf (2.1 mb)
ESM 1 (PDF 2184 kb)

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Shuyan Zhang
    • 1
  • Masakazu Ito
    • 2
    • 3
  • Jeffrey M. Skerker
    • 2
    • 3
  • Adam P. Arkin
    • 2
    • 3
  • Christopher V. Rao
    • 1
    Email author
  1. 1.Department of Chemical and Biomolecular EngineeringUniversity of Illinois at Urbana-ChampaignUrbanaUSA
  2. 2.Department of BioengineeringUniversity of CaliforniaBerkeleyUSA
  3. 3.Environmental Genomics and Systems Biology DivisionLawrence Berkeley National LaboratoryBerkeleyUSA

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