Difference between revisions of "Part:BBa K1645998:Experience"
(→‎Applications of BBa_K1645998)
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===Applications of BBa_K1645998===
 
===Applications of BBa_K1645998===
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This part can be used along with Cas9 once it is placed in front of an appropriate promoter in order to suppress transcription of a gene that is under lacI promoter.
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This part can be used along with CRISPR Cas9 system guiding cas9 protein to the target sequence. For our purposes we used dCas9 and we used RFP that is under lacI promoter. Then RFP intensity was measured using Imaginf Flow Cytometry (amnis). Since dCas9 is mutated and has no nuclease activity it will be placed on the promoter region and block the RNA polymerase from binding. This part was placed in front of a U6 promoter in order to suppress transcription of a RFP.  
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Our experiment was conducted in BL21. The characterization data using this part from our experiments demonstrates that when using this sgRNA co-transformed with dCas9, the RFP intensity which uses the LacI promoter is being suppressed by 41% compared with our control RFP not containing cas9 system. Here is the Flow Cytometry results, where the grey is control and blue is this biobrick used with dCas9. Significant repression of RFP can be seen in this graph.
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Our experiment was conducted in BL21 and IPTG was used to induce both RFP expression and dCas9 expression. The dcas9 used in our purposes was obtained from addgene see the link below. The characterization data using this part demonstrates that when using this sgRNA co-transformed with dCas9, the RFP intensity which uses the LacI promoter is being suppressed by 41% compared with our control RFP not containing dCas9. Here is the Flow Cytometry results, where the grey is control and purple is this biobrick used with dCas9 targeting RFP. This graph shows data from three separate experiments, look at the table below for mean intensity of RFP and the controls used in our experiment.
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Mean RFP intensity:
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Trial          RFP-Only (IPTG)        sgRNA-RFP-dCas9  (IPTG)
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1              14521.69                7148.96
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2              23135.77                5520.53
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3              11750.96                7413.74
  
 
===User Reviews===
 
===User Reviews===

Revision as of 15:00, 26 September 2015

This experience page is provided so that any user may enter their experience using this part.
Please enter how you used this part and how it worked out.

Applications of BBa_K1645998

This part can be used along with CRISPR Cas9 system guiding cas9 protein to the target sequence. For our purposes we used dCas9 and we used RFP that is under lacI promoter. Then RFP intensity was measured using Imaginf Flow Cytometry (amnis). Since dCas9 is mutated and has no nuclease activity it will be placed on the promoter region and block the RNA polymerase from binding. This part was placed in front of a U6 promoter in order to suppress transcription of a RFP. Our experiment was conducted in BL21 and IPTG was used to induce both RFP expression and dCas9 expression. The dcas9 used in our purposes was obtained from addgene see the link below. The characterization data using this part demonstrates that when using this sgRNA co-transformed with dCas9, the RFP intensity which uses the LacI promoter is being suppressed by 41% compared with our control RFP not containing dCas9. Here is the Flow Cytometry results, where the grey is control and purple is this biobrick used with dCas9 targeting RFP. This graph shows data from three separate experiments, look at the table below for mean intensity of RFP and the controls used in our experiment.

Mean RFP intensity: Trial RFP-Only (IPTG) sgRNA-RFP-dCas9 (IPTG) 1 14521.69 7148.96 2 23135.77 5520.53 3 11750.96 7413.74

User Reviews

UNIQ5a7769454843f9de-partinfo-00000001-QINU UNIQ5a7769454843f9de-partinfo-00000002-QINU