Engineering Rhodosporidium toruloides for increased lipid production

Area of Science:

• Biotechnology
• Microbial Engineering
• Synthetic Biology

Background:

• Oleaginous yeasts are valuable for producing lipids from sugars, serving as a sustainable source for chemicals and fuels.
• Rhodosporidium toruloides is a promising yeast species known for high native lipid production and ability to metabolize both glucose and xylose.

Purpose of the Study:

• To engineer Rhodosporidium toruloides for increased lipid production.
• To establish R. toruloides as a robust microbial platform for fatty-acid derived products.
• To provide genomic resources for R. toruloides metabolic engineering.

Main Methods:

• Genome sequencing and annotation of two R. toruloides strains (IFO0880 and IFO0559).
• Metabolic engineering via Agrobacterium tumefaciens-mediated transformation to overexpress acetyl-CoA carboxylase and diacylglycerol acyltransferase genes.
• Shake-flask cultivation to assess lipid production from glucose and xylose.

Main Results:

• Draft genome assemblies and annotations were generated for R. toruloides strains IFO0880 and IFO0559.
• Engineered R. toruloides achieved significant lipid yields: 16.4 ± 1.1 g/L from glucose and 9.5 ± 1.3 g/L from xylose.
• Demonstrated successful metabolic engineering in R. toruloides, a novel achievement for this yeast species.

Conclusions:

• Rhodosporidium toruloides is a highly promising yeast platform for the sustainable production of lipid-based chemicals and fuels.
• Metabolic engineering strategies, including gene overexpression, can significantly enhance lipid accumulation in R. toruloides.
• This research provides foundational genomic data and demonstrates the potential of R. toruloides for industrial biotechnology applications.