Difference between revisions of "Part:BBa K4960022"

 
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__NOTOC__
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<partinfo>BBa_K4960022 short</partinfo>
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===Usage and Biology===
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Noting the increasing demand for weight-loss drugs and the potential value and prospect of UCP1 (uncoupling protein 1) as a target for the treatment of obesity, [1] we conducted a series of design and experimental work on a modified UCP1 delivery strategy based on PVCs. Prior to this, we designed the payload in PVCs, a protein in which Pdp1NTD plays a key role in delivering protein loading into PVC, and we overexpressed UCP1 in the HEK293 cell line and added EGFP (Enhanced Green Fluorescent Protein) to see if it could target and work on the inner mitochondrial membrane.
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<span class='h3bb'>Sequence and Features</span>
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<partinfo>BBa_K4960022 SequenceAndFeatures</partinfo>
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===Special Design===
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In order to prevent UCP1 from forming inclusion bodies after expression in Escherichia coli and facilitate the localization of UCP1 after transfection, we introduced EGFP protein for fusion expression with UCP1. We designed a flexible peptide linker (GGSGG) to link Pdp1NTD, UCP1 and EGFP to form a fusion protein. However, based on the text result of 砖号, we switched the order of EGFP and UCP1 to ensure that the n-terminal sequence of UCP1 and the Pdp1NTD will no longer interact. (Figure 1)
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https://static.igem.wiki/teams/4960/wiki/basic-part-21.png
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Figure 1. Updated schematic diagram of design ideas. In the process of designing part, we switched the original sequence of EGFP and UCP1, and carried out the same experimental treatment as a new group of experimental groups, hoping to solve the problems encountered before
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===Functional text===
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This part is testing through cell experiments, that is, the Pdp1NTD-EGFP-UCP1 fusion protein was overexpressed on HEK293T cell lines using pcDNA3.1 as the carrier. Similar to the 砖号, we transfected HEK-293T cells with pNCXXX, a Pdp1NTD-EGFP-UCP1 expressing plasmid, and evaluated the cellular localization and function of the fusion protein at 48 h post transfection. As expected, both wide-field fluorescent imaging (Fig. 2a) and live-cell confocal imaging (Fig. 2b) showed a highly specific colocalization of Pdp1NTD-EGFP-UCP1 signal with mitochondria (labeled by MTS-mcherry). Moreover, cells transfected with pNCXXX showed a significantly higher glucose consumption compared to the control cells transfected with pcDNA3.1(+) vector (Fig. 2c), suggesting a significantly improved energy consumption in these cells.
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Figure 2a. Localization of Overexpressed pNCxxx Observed by Wide-Field Microscopy.
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Figure 2b.
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Figure 2c. Bar Chart Illustrating Glucose Consumption in pNCXXX Transfected HEK-293T Cells.
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<!-- Uncomment this to enable Functional Parameter display
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===Functional Parameters===
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<partinfo>BBa_K4960022 parameters</partinfo>
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===References===
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[1] Kolonin MG, Saha PK, Chan L, Pasqualini R, Arap W. Reversal of obesity by targeted ablation of adipose tissue. Nat Med. 2004 Jun;10(6):625-32.

Revision as of 18:39, 10 October 2023


Pdp1NTD-3*GGSGG-UCP1-2*GGSGG-EGFP


Usage and Biology

Noting the increasing demand for weight-loss drugs and the potential value and prospect of UCP1 (uncoupling protein 1) as a target for the treatment of obesity, [1] we conducted a series of design and experimental work on a modified UCP1 delivery strategy based on PVCs. Prior to this, we designed the payload in PVCs, a protein in which Pdp1NTD plays a key role in delivering protein loading into PVC, and we overexpressed UCP1 in the HEK293 cell line and added EGFP (Enhanced Green Fluorescent Protein) to see if it could target and work on the inner mitochondrial membrane. Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    INCOMPATIBLE WITH RFC[12]
    Illegal NheI site found at 505
  • 21
    INCOMPATIBLE WITH RFC[21]
    Illegal BamHI site found at 235
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    COMPATIBLE WITH RFC[25]
  • 1000
    COMPATIBLE WITH RFC[1000]

Special Design

In order to prevent UCP1 from forming inclusion bodies after expression in Escherichia coli and facilitate the localization of UCP1 after transfection, we introduced EGFP protein for fusion expression with UCP1. We designed a flexible peptide linker (GGSGG) to link Pdp1NTD, UCP1 and EGFP to form a fusion protein. However, based on the text result of 砖号, we switched the order of EGFP and UCP1 to ensure that the n-terminal sequence of UCP1 and the Pdp1NTD will no longer interact. (Figure 1) basic-part-21.png Figure 1. Updated schematic diagram of design ideas. In the process of designing part, we switched the original sequence of EGFP and UCP1, and carried out the same experimental treatment as a new group of experimental groups, hoping to solve the problems encountered before

Functional text

This part is testing through cell experiments, that is, the Pdp1NTD-EGFP-UCP1 fusion protein was overexpressed on HEK293T cell lines using pcDNA3.1 as the carrier. Similar to the 砖号, we transfected HEK-293T cells with pNCXXX, a Pdp1NTD-EGFP-UCP1 expressing plasmid, and evaluated the cellular localization and function of the fusion protein at 48 h post transfection. As expected, both wide-field fluorescent imaging (Fig. 2a) and live-cell confocal imaging (Fig. 2b) showed a highly specific colocalization of Pdp1NTD-EGFP-UCP1 signal with mitochondria (labeled by MTS-mcherry). Moreover, cells transfected with pNCXXX showed a significantly higher glucose consumption compared to the control cells transfected with pcDNA3.1(+) vector (Fig. 2c), suggesting a significantly improved energy consumption in these cells. 22222 Figure 2a. Localization of Overexpressed pNCxxx Observed by Wide-Field Microscopy. Figure 2b. Figure 2c. Bar Chart Illustrating Glucose Consumption in pNCXXX Transfected HEK-293T Cells.

References

[1] Kolonin MG, Saha PK, Chan L, Pasqualini R, Arap W. Reversal of obesity by targeted ablation of adipose tissue. Nat Med. 2004 Jun;10(6):625-32.