Difference between revisions of "Part:BBa K4414021"
 
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<partinfo>BBa_K4414021 short</partinfo>
 
<partinfo>BBa_K4414021 short</partinfo>
  
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This composite part consists of an C-Terminal EGFP (BBa_K1123017) and a N-Terminal NR3C1 LBD (BBa_K4414000) domain. It is designed to sense glucocorticoids and locate glucocorticoid receptor (GR) in cells.
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This composite part consists of an C-Terminal EGFP ([[Part:BBa_K1123017]]) and a N-Terminal GR LBD ([[Part:BBa_K4414000]]) domain. It is designed to sense glucocorticoids and locate glucocorticoid receptor (GR) in cells.
  
 
==Usage and Biology==
 
==Usage and Biology==
  
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We constructed a plasmid to link LBD with the fluorescent protein EGFP to verify the function of LBD. The EGFP on the C-Terminal locates glucocorticoid reporter (GR). The NR3C1 LBD domain on the N-Terminal is a ligand binding domain of the glucocorticoid receptor (GR). This LBD domain can translocate the fusion protein into the nucleus upon glucocorticoid stimulation. It also has a trans-activating domain 2 (τ2) and an activation function domain 2 (AF2) which activates downstream gene expression[1].  
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We constructed a plasmid to link LBD with the fluorescent protein EGFP to verify the function of LBD. The EGFP on the C-Terminal locates glucocorticoid reporter (GR). The GR LBD domain on the N-Terminal is a ligand binding domain of the glucocorticoid receptor (GR). This LBD domain can translocate the fusion protein into the nucleus upon glucocorticoid stimulation. It also has a trans-activating domain 2 (τ2) and an activation function domain 2 (AF2) which activates downstream gene expression(Weikum et al., 2017).  
  
 
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<img src="https://static.igem.wiki/teams/4414/wiki/021-1.png" class="figure-img img-fluid rounded"  height="150px">
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<img src="https://static.igem.wiki/teams/4414/wiki/021-1.jpg" class="figure-img img-fluid rounded"  height="150px">
  
 
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Figure 1.Schematic figure of BBa_K4414021
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===Sequecing===
 
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The plasmid was sequenced correct.
 
  
  
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===Method===
 
===Method===
  
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To test the ability of this part to respond to glucocorticoids, HEK-293T cells were co-transfected with plasmids encoding BBa_K4414021. Cells were treated with 10, 50, or 100 nM Glucocorticoids 6 h post-transfection. Cells without glucocorticoid treatment were used as control. Culture medium was collected at 24 h or 48 h post glucocorticoids treatment. Finally, we observe the fluorescence intensity of cells.
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To test the ability of this part to respond to glucocorticoids, HEK-293T cells were co-transfected with plasmids encoding BBa_K4414021. Cells were treated with 100 nM Glucocorticoids 6 h post-transfection. Cells without glucocorticoid treatment were used as control. The fluorescence intensity of cells was observed 24 h after posting glucocorticoids treatment.
  
 
===Result===
 
===Result===
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Figure 2.The picture on the left is Bright-field cell diagram, the picture in the middle is fluorescence diagram, and the picture on the right is merge diagram.
  
 
===Reference===
 
===Reference===
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[1].Weikum ER, Knuesel MT, Ortlund EA, Yamamoto KR. Glucocorticoid receptor control of transcription: precision and plasticity via allostery. Nat Rev Mol Cell Biol. 2017 Mar;18(3):159-174. doi: 10.1038/nrm.2016.152. Epub 2017 Jan 5. PMID: 28053348; PMCID: PMC6257982.
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1. Weikum, E. R., Knuesel, M. T., Ortlund, E. A., & Yamamoto, K. R. (2017). Glucocorticoid receptor control of transcription: precision and plasticity via allostery. Nature reviews. Molecular cell biology, 18(3), 159–174. https://doi.org/10.1038/nrm.2016.152

Latest revision as of 17:29, 11 October 2022


LBD-EGFP

This composite part consists of an C-Terminal EGFP (Part:BBa_K1123017) and a N-Terminal GR LBD (Part:BBa_K4414000) domain. It is designed to sense glucocorticoids and locate glucocorticoid receptor (GR) in cells.

Usage and Biology

We constructed a plasmid to link LBD with the fluorescent protein EGFP to verify the function of LBD. The EGFP on the C-Terminal locates glucocorticoid reporter (GR). The GR LBD domain on the N-Terminal is a ligand binding domain of the glucocorticoid receptor (GR). This LBD domain can translocate the fusion protein into the nucleus upon glucocorticoid stimulation. It also has a trans-activating domain 2 (τ2) and an activation function domain 2 (AF2) which activates downstream gene expression(Weikum et al., 2017).

Figure 1.Schematic figure of BBa_K4414021



Sequence and Features


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    COMPATIBLE WITH RFC[25]
  • 1000
    COMPATIBLE WITH RFC[1000]


Fuctional test

Method

To test the ability of this part to respond to glucocorticoids, HEK-293T cells were co-transfected with plasmids encoding BBa_K4414021. Cells were treated with 100 nM Glucocorticoids 6 h post-transfection. Cells without glucocorticoid treatment were used as control. The fluorescence intensity of cells was observed 24 h after posting glucocorticoids treatment.

Result

Fluorescence images are shown below, which indicates that glucocorticoids can bind to LBD and enter the nucleus. This provides a basic direction of thinking for our experiments.

Figure 2.The picture on the left is Bright-field cell diagram, the picture in the middle is fluorescence diagram, and the picture on the right is merge diagram.

Reference

1. Weikum, E. R., Knuesel, M. T., Ortlund, E. A., & Yamamoto, K. R. (2017). Glucocorticoid receptor control of transcription: precision and plasticity via allostery. Nature reviews. Molecular cell biology, 18(3), 159–174. https://doi.org/10.1038/nrm.2016.152