Composite

Part:BBa_M50041:Design

Designed by: Anika Naidu   Group: Stanford BIOE44 - S11   (2016-11-30)


Positive feedback cusR producer (mutated)


Assembly Compatibility:
  • 10
    INCOMPATIBLE WITH RFC[10]
    Illegal XbaI site found at 53
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    INCOMPATIBLE WITH RFC[23]
    Illegal XbaI site found at 53
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal XbaI site found at 53
    Illegal AgeI site found at 243
  • 1000
    COMPATIBLE WITH RFC[1000]


Design Notes

The second half of our genetic construct was “EColi_Promoter_Cassette,” containing strong RBS, the sequence for green fluorescent protein(GFP) with a terminator immediately following it, an ampicillin resistance marker, and a high copy number origin of replication (ORI). “EColi_Promoter_Cassette” was obtained from Dr. Kara Rogers.
We, in fact, designed 2 constructs, BBa_M50039 and BBa_M50041, where the only difference between them was the cusR-inducible promoter sequence. We explored 2 possible sequences of the cusR-inducible promoter: BBa_M50039’s cusR-inducible promoter sequence was from Zahid et al., 4 and BBa_M50041’s promoter sequence comprised the 250 basepairs preceding the cusR gene and was sourced from NCBI.
We ordered the constructs from DNA 2.0. Notably, we were unable to receive BBa_M50041 exactly as prescribed due to a deletion mutation at the final base, which could cause transcription that is unable to be terminated.
BBa M50039 design.png
BBa M50039 design 2.png
Second figure shows the response to cusR activation by copper ion.


Source

http://biocyc.org/gene?orgid=ECOLI&id=G6319

References

“cusR response regulator in two-component regulatory system with cusS [Escherichia coli str. K-12 substr. MG1655”. (2016, Sep. 10). NCBI Reference Sequences.

Zahid N, Zulfiqar S, Shakoori AR. (2012, March). Functional analysis of cus operon promoter of Klebsiella pneumoniae using E. coli lacZ assay. Gene, 495(1):81-88.

Loftin IR, et al. (2005, July). A novel copper-binding fold for the periplasmic copper resistance protein cusF. Biochemistry, 44(31):10533-10540.