Frontiers in Bioengineering and Biotechnology (Jan 2021)

Multi-Omics Driven Metabolic Network Reconstruction and Analysis of Lignocellulosic Carbon Utilization in Rhodosporidium toruloides

  • Joonhoon Kim,
  • Joonhoon Kim,
  • Joonhoon Kim,
  • Samuel T. Coradetti,
  • Samuel T. Coradetti,
  • Young-Mo Kim,
  • Young-Mo Kim,
  • Yuqian Gao,
  • Yuqian Gao,
  • Junko Yaegashi,
  • Junko Yaegashi,
  • Jeremy D. Zucker,
  • Jeremy D. Zucker,
  • Nathalie Munoz,
  • Nathalie Munoz,
  • Erika M. Zink,
  • Kristin E. Burnum-Johnson,
  • Kristin E. Burnum-Johnson,
  • Scott E. Baker,
  • Scott E. Baker,
  • Scott E. Baker,
  • Blake A. Simmons,
  • Blake A. Simmons,
  • Blake A. Simmons,
  • Jeffrey M. Skerker,
  • John M. Gladden,
  • John M. Gladden,
  • John M. Gladden,
  • Jon K. Magnuson,
  • Jon K. Magnuson,
  • Jon K. Magnuson

DOI
https://doi.org/10.3389/fbioe.2020.612832
Journal volume & issue
Vol. 8

Abstract

Read online

An oleaginous yeast Rhodosporidium toruloides is a promising host for converting lignocellulosic biomass to bioproducts and biofuels. In this work, we performed multi-omics analysis of lignocellulosic carbon utilization in R. toruloides and reconstructed the genome-scale metabolic network of R. toruloides. High-quality metabolic network models for model organisms and orthologous protein mapping were used to build a draft metabolic network reconstruction. The reconstruction was manually curated to build a metabolic model using functional annotation and multi-omics data including transcriptomics, proteomics, metabolomics, and RB-TDNA sequencing. The multi-omics data and metabolic model were used to investigate R. toruloides metabolism including lipid accumulation and lignocellulosic carbon utilization. The developed metabolic model was validated against high-throughput growth phenotyping and gene fitness data, and further refined to resolve the inconsistencies between prediction and data. We believe that this is the most complete and accurate metabolic network model available for R. toruloides to date.

Keywords