Composite

Part:BBa_K2571006:Design

Designed by: Tugba İnanc, Ceyhun Kayihan   Group: iGEM18_METU_HS_Ankara   (2018-07-03)
Revision as of 19:18, 17 October 2018 by Aku2001 (Talk | contribs) (→‎Source)


Dual Expression of FucO and GSH


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    INCOMPATIBLE WITH RFC[12]
    Illegal NheI site found at 7
    Illegal NheI site found at 30
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    COMPATIBLE WITH RFC[25]
  • 1000
    INCOMPATIBLE WITH RFC[1000]
    Illegal BsaI.rc site found at 3247


Design Notes

Design Notes of Dual Expression of FucO and GSH (BBa_K2571006)

Our construct for composite part 3 is composed of two stages, first the reduction of furans (specifically furfural and 5-HMF) and second the detoxification of reactive oxygen species (ROS). To achieve this effect, we designed our composite 3 part as with a prefix, a strong promoter (J23100), RBS (B0034), fucO as the first protein coding region (BBa_K2571003), RBS (B0034), GSH as the second protein coding region(BBa_K2571005) , double terminator (B0015) and suffix.


Circuit design of BBa_K2571006. Our construct includes a strong promoter,RBS, FucO, RBS, GSH and double terminator.


Our construct is inserted into pSB1C3 and delivered to the Registry. Our construct is also inserted into pSB1A3 and transferred into KO11 to conduct further biochemical assays.

Given that fucO is NADH-dependent it outperforms other oxidoreductases, by not interfering with the NADPH metabolism of the organism while converting highly toxic substances, furfural and 5-HMF to non-harmful alcohols. This characteristic of fucO is crucial because the expression of oxidoreductases like Yqhd are NADPH-dependent, hence they compete with the biosynthesis for NADPH, which results in inhibiting the growth of the organism.

Glutathione, on the other hand, is recycled using NAD(P)H pathways and since now it will be overexpressed and with NADH metabolism is not being altered thanks to FucO, antioxidant capacity of the cell will be increased dramatically, result in amplified immunity to both furans and ROS, habilitating cell growth, increasing ethanol yield by the virtue of increasing cell mass and reproduction, and improved metabolism.



Source

Escherichia coli str. K-12 substrain MG1655 (strain: K-12, substrain: MG1655) , Streptococcus thermophilus

References