Bioconversion of d-xylose to d-xylonate with Kluyveromyces lactis

Yvonne Nygård; Mervi H. Toivari; Merja Penttilä; Laura Ruohonen; Marilyn G. Wiebe

doi:10.1016/j.ymben.2011.04.001

Bioconversion of d-xylose to d-xylonate with Kluyveromyces lactis

Yvonne Nygård, Mervi H. Toivari, Merja Penttilä, Laura Ruohonen, Marilyn G. Wiebe

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

36 Citations (Scopus)

Abstract

d-Xylonate was produced from d-xylose using Kluyveromyces lactis strains which expressed the gene for NADP ⁺-dependent d-xylose dehydrogenase from Trichoderma reesei (xyd1). Up to 19±2g d-xylonatel ^-1 was produced when K. lactis expressing xyd1 was grown on 10.5gd-galactosel ^-1 and 40g d-xylosel ^-1. Intracellular accumulation of d-xylonate (up to ~70mg [gbiomass] ^-1) was observed.d-Xylose was metabolised to d-xylonate, xylitol and biomass. Oxygen could be reduced to 6mmolO ₂l ^-1h ^-1 without loss in titre or production rate, but metabolism of d-xylose and xylitol were more efficient when 12mmolO ₂l ^-1h ^-1 were provided.d-Xylose uptake was not affected by deletion of either the d-xylose reductase (XYL1) or a putative xylitol dehydrogenase encoding gene (XYL2) in xyd1 expressing strains. K. lactis xyd1Δ XYL1 did not produce extracellular xylitol and produced more d-xylonate than the xyd1 strain containing the endogenous XYL1. K. lactis xyd1Δ. XYL2 produced high concentrations of xylitol and significantly less d-xylonate than the xyd1 strain with the endogenous XYL2.

Original language	English
Pages (from-to)	383-391
Journal	Metabolic Engineering
Volume	13
Issue number	4
DOIs	https://doi.org/10.1016/j.ymben.2011.04.001
Publication status	Published - 1 Jul 2011
MoE publication type	A1 Journal article-refereed

Keywords

Aeration
D-xylonic acid
D-xylose
D-xylose reductase
K. lactis
Xylitol dehydrogenase

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Nygård, Y., Toivari, M. H., Penttilä, M., Ruohonen, L., & Wiebe, M. G. (2011). Bioconversion of d-xylose to d-xylonate with Kluyveromyces lactis. Metabolic Engineering, 13(4), 383-391. https://doi.org/10.1016/j.ymben.2011.04.001

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title = "Bioconversion of d-xylose to d-xylonate with Kluyveromyces lactis",

abstract = "d-Xylonate was produced from d-xylose using Kluyveromyces lactis strains which expressed the gene for NADP +-dependent d-xylose dehydrogenase from Trichoderma reesei (xyd1). Up to 19±2g d-xylonatel -1 was produced when K. lactis expressing xyd1 was grown on 10.5gd-galactosel -1 and 40g d-xylosel -1. Intracellular accumulation of d-xylonate (up to ~70mg [gbiomass] -1) was observed.d-Xylose was metabolised to d-xylonate, xylitol and biomass. Oxygen could be reduced to 6mmolO 2l -1h -1 without loss in titre or production rate, but metabolism of d-xylose and xylitol were more efficient when 12mmolO 2l -1h -1 were provided.d-Xylose uptake was not affected by deletion of either the d-xylose reductase (XYL1) or a putative xylitol dehydrogenase encoding gene (XYL2) in xyd1 expressing strains. K. lactis xyd1Δ XYL1 did not produce extracellular xylitol and produced more d-xylonate than the xyd1 strain containing the endogenous XYL1. K. lactis xyd1Δ. XYL2 produced high concentrations of xylitol and significantly less d-xylonate than the xyd1 strain with the endogenous XYL2.",

keywords = "Aeration, D-xylonic acid, D-xylose, D-xylose reductase, K. lactis, Xylitol dehydrogenase",

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AU - Nygård, Yvonne

AU - Toivari, Mervi H.

AU - Penttilä, Merja

AU - Ruohonen, Laura

AU - Wiebe, Marilyn G.

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N2 - d-Xylonate was produced from d-xylose using Kluyveromyces lactis strains which expressed the gene for NADP +-dependent d-xylose dehydrogenase from Trichoderma reesei (xyd1). Up to 19±2g d-xylonatel -1 was produced when K. lactis expressing xyd1 was grown on 10.5gd-galactosel -1 and 40g d-xylosel -1. Intracellular accumulation of d-xylonate (up to ~70mg [gbiomass] -1) was observed.d-Xylose was metabolised to d-xylonate, xylitol and biomass. Oxygen could be reduced to 6mmolO 2l -1h -1 without loss in titre or production rate, but metabolism of d-xylose and xylitol were more efficient when 12mmolO 2l -1h -1 were provided.d-Xylose uptake was not affected by deletion of either the d-xylose reductase (XYL1) or a putative xylitol dehydrogenase encoding gene (XYL2) in xyd1 expressing strains. K. lactis xyd1Δ XYL1 did not produce extracellular xylitol and produced more d-xylonate than the xyd1 strain containing the endogenous XYL1. K. lactis xyd1Δ. XYL2 produced high concentrations of xylitol and significantly less d-xylonate than the xyd1 strain with the endogenous XYL2.

AB - d-Xylonate was produced from d-xylose using Kluyveromyces lactis strains which expressed the gene for NADP +-dependent d-xylose dehydrogenase from Trichoderma reesei (xyd1). Up to 19±2g d-xylonatel -1 was produced when K. lactis expressing xyd1 was grown on 10.5gd-galactosel -1 and 40g d-xylosel -1. Intracellular accumulation of d-xylonate (up to ~70mg [gbiomass] -1) was observed.d-Xylose was metabolised to d-xylonate, xylitol and biomass. Oxygen could be reduced to 6mmolO 2l -1h -1 without loss in titre or production rate, but metabolism of d-xylose and xylitol were more efficient when 12mmolO 2l -1h -1 were provided.d-Xylose uptake was not affected by deletion of either the d-xylose reductase (XYL1) or a putative xylitol dehydrogenase encoding gene (XYL2) in xyd1 expressing strains. K. lactis xyd1Δ XYL1 did not produce extracellular xylitol and produced more d-xylonate than the xyd1 strain containing the endogenous XYL1. K. lactis xyd1Δ. XYL2 produced high concentrations of xylitol and significantly less d-xylonate than the xyd1 strain with the endogenous XYL2.

KW - Aeration

KW - D-xylonic acid

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KW - D-xylose reductase

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