Difference between revisions of "Part:BBa K4880016"
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To test whether α-pinene is produced, we plan on performing gas chromatography with the help of our advisors.
 
To test whether α-pinene is produced, we plan on performing gas chromatography with the help of our advisors.
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References
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Blanc-Garin V, Chenebault C, Diaz-Santos E, Vincent M, Sassi JF, Cassier-Chauvat C, Chauvat F. Exploring the potential of the model cyanobacterium Synechocystis PCC 6803 for the photosynthetic production of various high-value terpenes. Biotechnol Biofuels Bioprod. 2022 Oct 14;15(1):110.

Revision as of 08:57, 12 October 2023


Ptrc-theo-αPS

This composite part encodes for αPS and is composed of the basic parts theophylline inducible promoter and α-pinene synthase.

Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    INCOMPATIBLE WITH RFC[21]
    Illegal BamHI site found at 1361
    Illegal XhoI site found at 1441
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal AgeI site found at 55
  • 1000
    COMPATIBLE WITH RFC[1000]


Assembly

Plasmid construction

Through homologous recombination, we integrated the α-pinene synthase gene into the broad host range replicative vector pPMQAK1 along with the theophylline inducible promoter. The following figure shows the recombinant plasmid.


Figure 1: pPMQAK1-Ptrc-theo-αPS plasmid diagram

Parts

Theophylline inducible promoter

We decided to use an induction system composed of Ptrc promoter and theophylline dependent riboswitch theo E* to control the expression of the α-pinene synthase. The Ptrc promoter is a hybrid of lac and trp, making it stronger than the lac promoter. Transcription is regulated by IPTG and translation initiates only when there is theophylline present. This double regulation strictly regulates gene expression.

α-pinene synthase

α-pinene synthase converts geranyl pyrophosphate to (-)-α-pinene and is isolated from Sitka spruce.

Results

After transforming pPMQAK1-Ptrc-theo-αPS into E. coli DH5α, we performed colony PCR on the monocultures and selected the successfully transformed ones for amplification and extraction to later transform it into Synechocystis sp. PCC 6803. The figure below shows the colony PCR results.


Figure 2: αPS colony PCR gel electrophoresis results (E. coli DH5α)

To further confirm the constructed plasmids are correct, we sent them to be sequenced. Below are the sequencing results.


Figure 3: sequencing results of pPMQAK1-Ptrc-theo-αPS

After transforming pPMQAK1-Ptrc-theo-αPS into Synechocystis sp. PCC 6803, we performed colony PCR. Below are the results.


Figure 4: αPS colony PCR gel electrophoresis results (Synechocystis sp. PCC 6803)

To test whether α-pinene is produced, we plan on performing gas chromatography with the help of our advisors.

References Blanc-Garin V, Chenebault C, Diaz-Santos E, Vincent M, Sassi JF, Cassier-Chauvat C, Chauvat F. Exploring the potential of the model cyanobacterium Synechocystis PCC 6803 for the photosynthetic production of various high-value terpenes. Biotechnol Biofuels Bioprod. 2022 Oct 14;15(1):110.