Engineering of Corynebacterium glutamicum for minimized carbon loss during utilization of D-xylose containing substrates

Radek A, Krumbach K, Gaetgens J, Wendisch VF, Wiechert W, Bott M, Noack S, Marienhagen J (2014)
Journal of Biotechnology 192: 156-160.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
Download
Es wurde kein Volltext hochgeladen. Nur Publikationsnachweis!
Autor/in
; ; ; ; ; ; ;
Abstract / Bemerkung
Biomass-derived D-xylose represents an economically interesting substrate for the sustainable microbial production of value-added compounds. The industrially important platform organism Corynebacterium glutamicum has already been engineered to grow on this pentose as sole carbon and energy source. However, all currently described C. glutamicum strains utilize D-xylose via the commonly known isomerase pathway that leads to a significant carbon loss in the form of CO2, in particular, when aiming for the synthesis of alpha-ketoglutarate and its derivatives (e.g. L-glutamate). Driven by the motivation to engineer a more carbon-efficient C. glutamicum strain, we functionally integrated the Weimberg pathway from Caulobacter crescentus in C. glutamicum. This five-step pathway, encoded by the xylXABCD-operon, enabled a recombinant C. glutamicum strain to utilize D-xylose in D-xylose/D-glucose mixtures. Interestingly, this strain exhibited a tri-phasic growth behavior and transiently accumulated D-xylonate during D-xylose utilization in the second growth phase. However, this intermediate of the implemented oxidative pathway was re-consumed in the third growth phase leading to more biomass formation. Furthermore, C. glutamicum pEKEx3-xylXABCD(Cc) was also able to grow on D-xylose as sole carbon and energy source with a maximum growth rate of mu(max) = 0.07 +/- 0.01 h(-1). These results render C. glutamicum pEKEx3-xylXABCD(Cc) a promising starting point for the engineering of efficient production strains, exhibiting only minimal carbon loss on D-xylose containing substrates. (C) 2014 Elsevier B.V. All rights reserved.
Stichworte
D-Xylose; Corynebacterium glutamicum; Metabolic engineering; Weimberg; pathway; alpha-Ketoglutarate
Erscheinungsjahr
2014
Zeitschriftentitel
Journal of Biotechnology
Band
192
Seite(n)
156-160
ISSN
0168-1656
Page URI
https://pub.uni-bielefeld.de/record/2717570

Zitieren

Radek A, Krumbach K, Gaetgens J, et al. Engineering of Corynebacterium glutamicum for minimized carbon loss during utilization of D-xylose containing substrates. Journal of Biotechnology. 2014;192:156-160.
Radek, A., Krumbach, K., Gaetgens, J., Wendisch, V. F., Wiechert, W., Bott, M., Noack, S., et al. (2014). Engineering of Corynebacterium glutamicum for minimized carbon loss during utilization of D-xylose containing substrates. Journal of Biotechnology, 192, 156-160. doi:10.1016/j.jbiotec.2014.09.026
Radek, A., Krumbach, K., Gaetgens, J., Wendisch, V. F., Wiechert, W., Bott, M., Noack, S., and Marienhagen, J. (2014). Engineering of Corynebacterium glutamicum for minimized carbon loss during utilization of D-xylose containing substrates. Journal of Biotechnology 192, 156-160.
Radek, A., et al., 2014. Engineering of Corynebacterium glutamicum for minimized carbon loss during utilization of D-xylose containing substrates. Journal of Biotechnology, 192, p 156-160.
A. Radek, et al., “Engineering of Corynebacterium glutamicum for minimized carbon loss during utilization of D-xylose containing substrates”, Journal of Biotechnology, vol. 192, 2014, pp. 156-160.
Radek, A., Krumbach, K., Gaetgens, J., Wendisch, V.F., Wiechert, W., Bott, M., Noack, S., Marienhagen, J.: Engineering of Corynebacterium glutamicum for minimized carbon loss during utilization of D-xylose containing substrates. Journal of Biotechnology. 192, 156-160 (2014).
Radek, Andreas, Krumbach, Karin, Gaetgens, Jochem, Wendisch, Volker F., Wiechert, Wolfgang, Bott, Michael, Noack, Stephan, and Marienhagen, Jan. “Engineering of Corynebacterium glutamicum for minimized carbon loss during utilization of D-xylose containing substrates”. Journal of Biotechnology 192 (2014): 156-160.

Export

Markieren/ Markierung löschen
Markierte Publikationen

Open Data PUB

Web of Science

Dieser Datensatz im Web of Science®

Quellen

PMID: 25304460
PubMed | Europe PMC

Suchen in

Google Scholar