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Engineering co-utilization of glucose and xylose for chemical overproduction from lignocellulose.

Jiaoqi GaoWei YuYunxia LiMingjie JinLun YaoYongjin J Zhou
Published in: Nature chemical biology (2023)
Bio-refining lignocellulose could provide a sustainable supply of fuels and fine chemicals; however, the challenges associated with the co-utilization of xylose and glucose typically compromise the efficiency of lignocellulose conversion. Here we engineered the industrial yeast Ogataea polymorpha (Hansenula polymorpha) for lignocellulose biorefinery by facilitating the co-utilization of glucose and xylose to optimize the production of free fatty acids (FFAs) and 3-hydroxypropionic acid (3-HP) from lignocellulose. We rewired the central metabolism for the enhanced supply of acetyl-coenzyme A and nicotinamide adenine dinucleotide phosphate hydrogen, obtaining 30.0 g l -1 of FFAs from glucose, with productivity of up to 0.27 g l -1  h -1 . Strengthening xylose uptake and catabolism promoted the synchronous utilization of glucose and xylose, which enabled the production of 38.2 g l -1 and 7.0 g l -1 FFAs from the glucose-xylose mixture and lignocellulosic hydrolysates, respectively. Finally, this efficient cell factory was metabolically transformed for 3-HP production with the highest titer of 79.6 g l -1 in fed-batch fermentation in mixed glucose and xylose.
Keyphrases
  • saccharomyces cerevisiae
  • blood glucose
  • fatty acid
  • type diabetes
  • heavy metals
  • metabolic syndrome
  • skeletal muscle
  • mesenchymal stem cells