Genome-scale metabolic reconstruction of the non-model yeast SD108 and its application to organic acids production. Author Patrick Suthers, Hoang Dinh, Zia Fatma, Yihui Shen, Siu Chan, Joshua Rabinowitz, Huimin Zhao, Costas Maranas Publication Year 2020 Type Journal Article Abstract Many platform chemicals can be produced from renewable biomass by microorganisms, with organic acids making up a large fraction. Intolerance to the resulting low pH growth conditions, however, remains a challenge for the industrial production of organic acids by microorganisms. SD108 is a promising host for industrial production because it is tolerant to acidic conditions as low as pH 2.0. With the goal to systematically assess the metabolic capabilities of this non-model yeast, we developed a genome-scale metabolic model for SD108 spanning 850 genes, 1826 reactions, and 1702 metabolites. In order to improve the model's quantitative predictions, organism-specific macromolecular composition and ATP maintenance requirements were determined experimentally and implemented. We examined its network topology, including essential genes and flux coupling analysis and drew comparisons with the Yeast 8.3 model for . We explored the carbon substrate utilization and examined the organism's production potential for the industrially-relevant succinic acid, making use of the OptKnock framework to identify gene knockouts which couple production of the targeted chemical to biomass production. The genome-scale metabolic model 850 is a data-supported curated model which can inform genetic interventions for overproduction. Journal Metab Eng Commun Volume 11 Pages e00148 Date Published 2020 Dec ISSN Number 2214-0301 DOI 10.1016/j.mec.2020.e00148 Alternate Journal Metab Eng Commun PMCID PMC7586132 PMID 33134082 PubMedPubMed CentralGoogle ScholarBibTeXEndNote X3 XML