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                     <img width="400px" src="https://static.igem.wiki/teams/4585/wiki/the-model-diagram-of-pcdna3-1-3-ha-gal4-vp64-nls.png"></p>
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                 <p style="width: 80%;text-align:center;font-size: .2rem; margin: -1rem auto 1rem auto; color: #888;">Fig.1 The model diagram of pcDNA3.1(+)-3×HA-GAL4-VP64-NLS</p>
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                 <p style="width: 80%;text-align:center;font-size: .9rem; margin: -1rem auto 1rem auto; color: #888;">Fig.1 The model diagram of pcDNA3.1(+)-3×HA-GAL4-VP64-NLS</p>
 
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                 <p>Insulin can be processed and secreted outside the cell in 293T cells.
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                 <p>HEK 293T cells were transiently transfected with GAL-VP64 and GAL-KRAB plasmids, and an appropriate amount of Luciferase plasmids were transfected to simulate GnRH. The experiment showed that the GAL-VP64 plasmid could initiate the expression of GAL4-KRAB and Luciferase.
 
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                     <img width="400px" src="https://static.igem.wiki/teams/4585/wiki/biofluorescence-intensity-when-gal4-vp64-gal4-krab-400-ng.png"></p>
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                 <p style="width: 80%;text-align:center;font-size: .9rem; margin: -1rem auto 1rem auto; color: #888;">Fig.2 Standard curve of absorbance and insulin concentration</p>
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                 <p style="width: 80%;text-align:center;font-size: .9rem; margin: -1rem auto 1rem auto; color: #888;">Fig 2. Bioluminescence intensity when GAL4-VP64=GAL4-KRAB=400 ng</p>
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                <p style="width: 80%;text-align:center;font-size: .9rem; margin: -1rem auto 1rem auto; color: #888;">Fig.3 Insulin concentration in supernatant after blue light irradiation and dark treatment respectively</p>
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                <p style="width: 80%;text-align:center;font-size: .9rem; margin: -1rem auto 1rem auto; color: #888;">Fig.4 Insulin concentration in supernatant (excluding insulin in medium) after blue light irradiation and dark treatment respectively</p>
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                 3.Caution
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                 3 Caution
 
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                 <p>Insulin is not suitable for long time preservation under the best culture temperature of cells (37℃). In the mean time, cells would also consume some of the expressed insulin. So the best tst time for Insulin is approximately 24 hours
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                 <p>After sequencing and ensuring the sequence was correct, we applied it to the experiments. Store at 4℃.
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                    after transfection, it is relatively shorter than the test interval of LUC.
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                Reference：
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                <p>[1]Mingqi Xie, Haifeng Ye, Hui Wang.β-cell-mimetic designer cells provide closed-loop glycemic control[J].Science.2016 Dec 9;354(6317):1296-1301.
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===Usage and Biology===
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<span class='h3bb'>Sequence and Features</span>
 
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===Functional Parameters===
 
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Latest revision as of 03:39, 9 October 2023

pcDNA3.1(+)-3XHA-GAL4-VP64-NLS

The pcDNA3.1(+)-3×HA-GAL4-VP64-NLS plasmid, which could express GAL4-VP64, was used for Luciferase detection experiment. GAL4 is a protein that can find and bind UAS (upstream activation sequence). VP64 is a transcription factor that, when used in combination with GAL4, can activate UAS and initiate the expression of downstream genes.

pcDNA3.1(+)-3×HA-GAL4-VP64-NLS

The pcDNA3.1(+)-3×HA-GAL4-VP64-NLS plasmid was obtained through homologous recombination of the VP64 homologous recombination insert (BBa_K4585002) with pcDNA3.1(+)-3×HA-GAL4-VP64-NLS linearized vector (BBa_K4585006). The homologous recombination plasmid product was identified as the target product by sequencing and enzyme cutting and agarose gel electrophoresis.

1 Pattern Diagram


Fig.1 The model diagram of pcDNA3.1(+)-3×HA-GAL4-VP64-NLS

2 Experiment

2.1 Method

The pcDNA3.1(+)-3×HA-GAL4-VP64-NLS plasmid could express GAL4-VP64, thereby activating 9×UAS, which could activate the expression of its downstream gene, GAL4-KRAB or Luciferase.

2.2 Results

HEK 293T cells were transiently transfected with GAL-VP64 and GAL-KRAB plasmids, and an appropriate amount of Luciferase plasmids were transfected to simulate GnRH. The experiment showed that the GAL-VP64 plasmid could initiate the expression of GAL4-KRAB and Luciferase.


Fig 2. Bioluminescence intensity when GAL4-VP64=GAL4-KRAB=400 ng

3 Caution

After sequencing and ensuring the sequence was correct, we applied it to the experiments. Store at 4℃.


Sequence and Features


Assembly Compatibility:
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