Difference between revisions of "Part:BBa K4880016"
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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. | 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. | ||
| − | <html><img src ="https://static.igem.wiki/teams/4880/wiki/parts/alphaps-plasmid.png" width = "50%"><br></html> | + | <center><html><img src ="https://static.igem.wiki/teams/4880/wiki/parts/alphaps-plasmid.png" width = "50%"><br></html></center> |
| + | <center>Figure 1: pPMQAK1-Ptrc-theo-αPS plasmid diagram</center> | ||
===Parts=== | ===Parts=== | ||
| Line 36: | Line 37: | ||
===Results=== | ===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. | + | 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. |
| − | <html><img src ="https://static.igem.wiki/teams/4880/wiki/parts/alphaps-ecoli-gel.png" width = "40%"><br></html> | + | <center><html><img src ="https://static.igem.wiki/teams/4880/wiki/parts/alphaps-ecoli-gel.png" width = "40%"><br></html></center> |
| + | <center>Figure 2: αPS colony PCR gel electrophoresis results (E. coli DH5α)</center> | ||
To further confirm the constructed plasmids are correct, we sent them to be sequenced. Below are the sequencing results. | To further confirm the constructed plasmids are correct, we sent them to be sequenced. Below are the sequencing results. | ||
| − | <html><img src ="https://static.igem.wiki/teams/4880/wiki/parts/alphaps-sequencing.png" width = "75%"><br></html> | + | <center><html><img src ="https://static.igem.wiki/teams/4880/wiki/parts/alphaps-sequencing.png" width = "75%"><br></html></center> |
| + | <center>Figure 3: sequencing results of pPMQAK1-Ptrc-theo-αPS</center> | ||
| − | After transforming pPMQAK1-Ptrc-theo-αPS into Synechocystis sp. PCC 6803 we performed colony PCR. Below are the results. | + | After transforming pPMQAK1-Ptrc-theo-αPS into Synechocystis sp. PCC 6803, we performed colony PCR. Below are the results. |
| − | <html><img src ="https://static.igem.wiki/teams/4880/wiki/parts/alphaps-6803-gel.png" width = "20%"><br></html> | + | <center><html><img src ="https://static.igem.wiki/teams/4880/wiki/parts/alphaps-6803-gel.png" width = "20%"><br></html></center> |
| + | <center>Figure 4: αPS colony PCR gel electrophoresis results (Synechocystis sp. PCC 6803)</center> | ||
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. | ||
| + | |||
| + | ===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. | ||
Latest revision as of 08:58, 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
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21INCOMPATIBLE WITH RFC[21]Illegal BamHI site found at 1361
Illegal XhoI site found at 1441 - 23COMPATIBLE WITH RFC[23]
- 25INCOMPATIBLE WITH RFC[25]Illegal AgeI site found at 55
- 1000COMPATIBLE 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.
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.
To further confirm the constructed plasmids are correct, we sent them to be sequenced. Below are the sequencing results.
After transforming pPMQAK1-Ptrc-theo-αPS into Synechocystis sp. PCC 6803, we performed colony PCR. Below are the results.
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.