Difference between revisions of "Part:BBa K4438121"

 
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This part can be used for the detection of miR-222, which proves to be a biomarker for many diseases. A promoter sequence added in the beginning enhances its usage in both in-vivo and in-vitro conditions. The OFF(A) and ON(A) structure for the sensor was generated as given:
 
This part can be used for the detection of miR-222, which proves to be a biomarker for many diseases. A promoter sequence added in the beginning enhances its usage in both in-vivo and in-vitro conditions. The OFF(A) and ON(A) structure for the sensor was generated as given:
 
[[File:T--IISER-Tirupati_India--miRNA_222_2.png]]
 
[[File:T--IISER-Tirupati_India--miRNA_222_2.png]]
 +
We performed an In-silico analysis where we replaced the 12th position A with G and the 86th position U with C in Spinach 2.1 to generate a modified Spinach 2.6 PDB file. We used this to confirm the decrease in the binding energy of aptamer and dye.
  
  

Latest revision as of 15:48, 12 October 2022

FASTmiR-222-D2_s

FASTmiR stands for Fluorescence Aptamer Sensor For Tracking miRNAs. It is an RNA-based sensor for in-vitro quantification of miRNAs. This part is the expression cassette for BBa_K4438101 with BBa_J64997 upstream and BBa_K731721 downstream along with some spacer sequences BBa_K3831027 (at 5’ end) and BBa_K4438136 (at 3’ end). FASTmiR-222-D2_s, after transcription, binds to miR-222, the transcription product of BBa_K4438150. The binding of these to RNAs will lead to the revelation of a binding site for DFHBI, a fluorophore, where it gets trapped and shows fluorescence.

Usage and Biology

This part can be used for the detection of miR-222, which proves to be a biomarker for many diseases. A promoter sequence added in the beginning enhances its usage in both in-vivo and in-vitro conditions. The OFF(A) and ON(A) structure for the sensor was generated as given: T--IISER-Tirupati India--miRNA 222 2.png We performed an In-silico analysis where we replaced the 12th position A with G and the 86th position U with C in Spinach 2.1 to generate a modified Spinach 2.6 PDB file. We used this to confirm the decrease in the binding energy of aptamer and dye.


Sequence and Features


Assembly Compatibility:
  • 10
    INCOMPATIBLE WITH RFC[10]
    Illegal SpeI site found at 100
  • 12
    INCOMPATIBLE WITH RFC[12]
    Illegal NheI site found at 176
    Illegal SpeI site found at 100
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    INCOMPATIBLE WITH RFC[23]
    Illegal SpeI site found at 100
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal SpeI site found at 100
  • 1000
    COMPATIBLE WITH RFC[1000]


Notes

The split position of the complementary sequence in the sensor is ACCCAGTAGCC....AGAGTGAGCT

References

Huang, K., Doyle, F., Wurz, Z. E., Tenenbaum, S. A., Hammond, R. K., Caplan, J. L., & Meyers, B. C. (2017). FASTmiR: an RNA-based sensor for in vitro quantification and live-cell localization of small RNAs. Nucleic acids research, 45(14), e130-e130