Cosubstrate effect on xylose reductase and xylitol dehydrogenase activity levels, and its consequence on xylitol production by Candida tropicalis

Tamburini, Elena; Bianchini, Ercolina; Bruni, A.; Forlani, Giuseppe

doi:10.1016/j.enzmictec.2010.01.001

Cited by 30 publications

(26 citation statements)

References 28 publications

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“…However, C. beijerinckii did not show a decreasing trend in terms of glycerol consumption in comparison to increasing glucose addition. Glucose is preferentially used for microorganisms (Tamburini et al, 2010). Therefore, as glycerol concentration was increased, glucose started to be an inhibitory of glycerol utilization.…”

Section: Resultsmentioning

confidence: 98%

Comparison of Two Natural 1,3-Propanediol Producers in Regards to the Effect of Glucose Usage as a Co-substrate

Güngörmüşler

Azbar

2015

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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Biodiesel production, in which glycerol is produced as a by-product, has increased significantly and now vast amounts of glycerol have been considered as a waste product. Biotechnological conversion of glycerol into a valuable bioplastic raw material, namely, 1,3-propanediol (1,3-PDO) seems to be very promising. In this study, locally isolated Klebsiella pneumoniae and Clostridium beijerinckii NRRL B593 were comparatively studied for their 1,3-PDO production potential with the addition of different concentrations of glucose together with glycerol. Addition of a co-substrate enhanced the molar yields of 1,3-PDO by 11% only for K. pneumoniae with an addition of 1 g/L of glucose.

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Section: Resultsmentioning

confidence: 98%

Comparison of Two Natural 1,3-Propanediol Producers in Regards to the Effect of Glucose Usage as a Co-substrate

Güngörmüşler

Azbar

2015

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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“…In addition, glucose is known to be utilized for cell growth faster than xylose was used, allowing NADPH regeneration by metabolism through the pentose phosphate pathway (Parajó et al 1998). Tamburini et al (2010) reported that the addition of glucose as cosubstrate to xylose-containing medium caused an increase in biomass yield, but a delay in xylitol production; because xylose utilization took place only when the glucose had been completely metabolized.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of some lignocellulosic byproducts of food industry for microbial xylitol production by Candida tropicalis

Eryaşar

Karasu-Yalcin

2016

3 Biotech

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Some lignocellulosic food byproducts such as potato peels, wheat bran, barley bran and chestnut shells were evaluated as potential sources of xylose for microbial xylitol production by yeasts. Potential yeast strains were selected after screening xylitol production of some indigenous yeasts in a defined fermentation medium. Candida tropicalis strains gave the highest results with 83.28 and 54.07 g/L xylitol production from 100 g/L xylose. Lignocellulosic materials were exposed to acid hydrolysis at different conditions. Chestnut shells gave the highest xylose yield and the hydrolysate of chestnut shells was used in further experiments in which xylitol productions of two potential C. tropicalis strains were investigated. Combined detoxification method including evaporation, overliming and activated charcoal with the use of threefold concentration and also yeast extract supplementation suggested to be efficient for both growth and product formation in chestnut shell hydrolysate in which 40 % xylitol yield was obtained. It was concluded that detoxified and fortified chestnut shell hydrolysate could be a potential medium for xylitol production.

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“…(39) The presence of mixed substrates may interfere with the XR/XDH pathway, either by directly influencing both substrate uptake and XR/XDH gene expression or by varying the NADP/NADH ratio. Tamburini et al (50) evaluated the activity of XR and XDH on different substrates for Candida tropicalis and found that glucose significantly inhibited xylose reduction, galactose stimulated xylitol use, and maltose improved biomass growth and xylitol accumulation. Earlier studies have investigated the effect of glucose and xylose feeding at different ratios to increase the xylitol yield.…”

Section: Bioconversion Of Xylitol Productionmentioning

confidence: 98%

Xylitol Biological Production: A Review of Recent Studies

Mohamad

Kamal

Mokhtar

2014

Food Reviews International

110

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Xylitol is an alternative sweetener that is recommended for use in food and pharmaceutical products, as it has some health benefits. It is currently produced on a large scale using a chemical reduction that requires high energy and is costly. Biological conversion of xylitol using microorganisms is an alternative process that is environmentally friendly and cost-effective. This process has been studied in an effort to provide one that is high yielding and competitive with chemical processes. This article reviews recent studies in the development of biological conversion processes for the production of xylitol, including biomass conversion, fermenting microorganisms, and new technology for full-scale process development.

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Cosubstrate effect on xylose reductase and xylitol dehydrogenase activity levels, and its consequence on xylitol production by Candida tropicalis

Cited by 30 publications

References 28 publications

Comparison of Two Natural 1,3-Propanediol Producers in Regards to the Effect of Glucose Usage as a Co-substrate

Comparison of Two Natural 1,3-Propanediol Producers in Regards to the Effect of Glucose Usage as a Co-substrate

Evaluation of some lignocellulosic byproducts of food industry for microbial xylitol production by Candida tropicalis

Xylitol Biological Production: A Review of Recent Studies

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