Low pH d-xylonate production with Pichia kudriavzevii

Mervi Toivari; Maija Leena Vehkomäki; Yvonne Nygård; Merja Penttilä; Laura Ruohonen; Marilyn G. Wiebe

doi:10.1016/j.biortech.2013.01.157

Low pH d-xylonate production with Pichia kudriavzevii

Mervi Toivari, Maija Leena Vehkomäki, Yvonne Nygård, Merja Penttilä, Laura Ruohonen, Marilyn G. Wiebe

Research output: Contribution to journal › Article › Scientific › peer-review

50 Citations (Scopus)

Abstract

d-Xylonic acid is one of the top 30 most desirable chemicals to be derived from biomass sugars identified by the US Department of Energy, being applicable as a non-food substitute for d-gluconic acid and as a platform chemical. We engineered the non-conventional yeast Pichia kudriavzevii VTT C-79090T to express a d-xylose dehydrogenase coding gene from Caulobacter crescentus. With this single modification the recombinant P. kudriavzevii strain produced up to 171gL^-1 of d-xylonate from 171gL^-1 d-xylose at a rate of 1.4gL^-1h^-1 and yield of 1.0g [g substrate consumed]^-1, which was comparable with d-xylonate production by Gluconobacter oxydans or Pseudomonas sp. The productivity of the strain was also remarkable at low pH, producing 146gL^-1 d-xylonate at 1.2gL^-1h^-1 at pH 3.0. This is the best low pH production reported for d-xylonate. These results encourage further development towards industrial scale production.

Original language	English
Pages (from-to)	555-562
Journal	Bioresource Technology
Volume	133
DOIs	https://doi.org/10.1016/j.biortech.2013.01.157
Publication status	Published - 1 Jan 2013
MoE publication type	A1 Journal article-refereed

Keywords

D-Xylonate
D-Xylose
Issatchenkia orientalis
Low pH
Pichia kudriavzevii

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10.1016/j.biortech.2013.01.157

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title = "Low pH d-xylonate production with Pichia kudriavzevii",

abstract = "d-Xylonic acid is one of the top 30 most desirable chemicals to be derived from biomass sugars identified by the US Department of Energy, being applicable as a non-food substitute for d-gluconic acid and as a platform chemical. We engineered the non-conventional yeast Pichia kudriavzevii VTT C-79090T to express a d-xylose dehydrogenase coding gene from Caulobacter crescentus. With this single modification the recombinant P. kudriavzevii strain produced up to 171gL-1 of d-xylonate from 171gL-1 d-xylose at a rate of 1.4gL-1h-1 and yield of 1.0g [g substrate consumed]-1, which was comparable with d-xylonate production by Gluconobacter oxydans or Pseudomonas sp. The productivity of the strain was also remarkable at low pH, producing 146gL-1 d-xylonate at 1.2gL-1h-1 at pH 3.0. This is the best low pH production reported for d-xylonate. These results encourage further development towards industrial scale production.",

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AU - Toivari, Mervi

AU - Vehkomäki, Maija Leena

AU - Nygård, Yvonne

AU - Penttilä, Merja

AU - Ruohonen, Laura

AU - Wiebe, Marilyn G.

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AB - d-Xylonic acid is one of the top 30 most desirable chemicals to be derived from biomass sugars identified by the US Department of Energy, being applicable as a non-food substitute for d-gluconic acid and as a platform chemical. We engineered the non-conventional yeast Pichia kudriavzevii VTT C-79090T to express a d-xylose dehydrogenase coding gene from Caulobacter crescentus. With this single modification the recombinant P. kudriavzevii strain produced up to 171gL-1 of d-xylonate from 171gL-1 d-xylose at a rate of 1.4gL-1h-1 and yield of 1.0g [g substrate consumed]-1, which was comparable with d-xylonate production by Gluconobacter oxydans or Pseudomonas sp. The productivity of the strain was also remarkable at low pH, producing 146gL-1 d-xylonate at 1.2gL-1h-1 at pH 3.0. This is the best low pH production reported for d-xylonate. These results encourage further development towards industrial scale production.

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KW - Pichia kudriavzevii

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Low pH d-xylonate production with Pichia kudriavzevii

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