Part:BBa_K1602005

Xylose to xylitol converting operon

Xylose is a monosaccharide belonging to the aldopentose family. Through reduction it can be converted to xylitol. The reaction takes place in the cytosol of the host and recent studies show, that the formation of xylitol in E.coli seems possible as well.
To enable the reduction in E.coli it is mandatory to establish an operon containing the coding gene GRE3 for a aldose reductase. The gene is taken from Saccharomyces cerevisiae. The aldose reductase converts xylose to xylitol in dependence of NADPH.

Figure 1 Reaction scheme of the xylan to xylose converting operon. Xylan is the only substrate needed for the reaction. Xylan is metabolized to xylose in 1 step.

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Usage

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This part is a composite of one coding gene and a strong RBS (BBa_B0034) in front of it, under control of a T7 Promoter (BBa_I719005).

aldo reductase - GRE3 (BBa_K1602004)
	Figure 2 Genetic map of the xylan to xylose converting operon with T7 promoter. This brick directs the flux towards and finally enables E.Coli BL21 cells to convert xylan to xylose in presence of the inductor IPTG.

Sequence and Features

Assembly Compatibility:

• 10
  COMPATIBLE WITH RFC[10]
• 12
  COMPATIBLE WITH RFC[12]
• 21
  COMPATIBLE WITH RFC[21]
• 23
  COMPATIBLE WITH RFC[23]
• 25
  COMPATIBLE WITH RFC[25]
• 1000
  COMPATIBLE WITH RFC[1000]