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Establishing a synthetic pathway for high-level production of 3-hydroxypropionic acid in Saccharomyces cerevisiae via beta-alanine

I. Borodina ; K. R. Kildegaard ; N. B. Jensen ; T. H. Blicher ; J. Maury ; S. Sherstyk ; K. Schneider ; P. Lamosa ; M. J. Herrgard ; I. Rosenstand ; F. Oberg ; J. Forster ; Jens B. Nielsen (Institutionen för biologi och bioteknik, Systembiologi)
Metabolic Engineering (1096-7176). Vol. 27 (2015), p. 57-64.
[Artikel, refereegranskad vetenskaplig]

Microbial fermentation of renewable feedstocks into plastic monomers can decrease our fossil dependence and reduce global CO2 emissions. 3-Hydroxypropionic acid (3HP) is a potential chemical building block for sustainable production of superabsorbent polymers and acrylic plastics. With the objective of developing Saccharolnyces cerevisiae as an efficient cell factory for high-level production of 3HP, we identified the beta-alanine biosynthetic route as the most economically attractive according to the metabolic modeling. We engineered and optimized a synthetic pathway for de novo biosynthesis of beta-alanine and its subsequent conversion into 3HP using a novel beta-alanine-pyruvate aminotransferase discovered in Bacillus cereus. The final strain produced 3HP at a titer of 13.7 +/- 0.3 g L-1 with a 0.14 +/- 0.0 C-mol C-mol(-1) yield on glucose in 80 h in controlled fed-batch fermentation in mineral medium at pH 5, and this work therefore lays the basis for developing a process for biological 3HP production.

Nyckelord: Biosustainable acrylics, 3-hydroxypropionic acid, Saccharomyces cerevisiae, beta-alanine, beta-alanine-pyruvate aminotransferase



Denna post skapades 2015-01-22. Senast ändrad 2015-01-22.
CPL Pubid: 211393

 

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Institutioner (Chalmers)

Institutionen för biologi och bioteknik, Systembiologi

Ämnesområden

Industriell bioteknik

Chalmers infrastruktur

 


Projekt

Denna publikation är ett resultat av följande projekt:


Industrial Systems Biology of Yeast and A. oryzae (INSYSBIO) (EC/FP7/247013)