Part:BBa_K1806005

T7+ ibPB RNA Thermometer + RFP

The part is designed to produce RFP in higher temperatures. The RNA Thermometer acts as a heat-shock RBS.

Cloning

The already linear part was ligated to the pSB1C3 vector, and then transformated to be verified with Colony PCR. The RFP in the iGEM Registry contained Hind3, unlike the RFP in this part. For this reason, the part was cut with the EcoR1 and Hind3 restriction enzymes. The gel runs of the part were examined. The part was tagged as G-Block 7 and sample 7-6 yielded the accurate base pair length.

Functional Assay

The bacteria that were transformated with G-Block 7 were cultured in 5 ml and incubated for 13 hours. After this incubation, the cultures were incubated at respective temperatures for 4 hours and were given 50uM of iPTG twice with 4 hours periouds. There were a total 5 different temperatures that the cultures were incubated in: 4, 25, 37, 42 and 50 C. The proteins in the cultures were then isolated and the protein concentrations were measured. Data on RFP concentration were acquired at 584 nm of emission and 607 nm of excitation. The acquired values were divided to the total amount of protein to acquire the following ratio.

Tabled Data of the Protein Analysis

Medium Temperature	iPTG Presence +/-	Total Amount of Protein	RFP Fluorometric Measurement	RFP/Total
4	+	14.09	22.32	1.584
4	-	11.349	10.36	0.912
25	+	17.87	14.35	0.802
25	-	11.054	4,313	0,390
37	+	16.808	40.2	2.391
37	-	15.216	17.36	1.140
41	+	7.637	44.83	5.870
41	-	5.557	11.13	2.002
50	+	5.463	60.06	10.993
50	-	7.997	20.95	2.619

The graph shows the variance in density concentrations of RFP, caused as a result of the functioning of the iPTG Inducible Promoters in different temperatures. The functioning of the promoters increased cumulatively with increased temperatures.

Sequence and Features

Assembly Compatibility:

• 10
  COMPATIBLE WITH RFC[10]
• 12
  COMPATIBLE WITH RFC[12]
• 21
  INCOMPATIBLE WITH RFC[21]

  Illegal BglII site found at 2
  
• 23
  COMPATIBLE WITH RFC[23]
• 25
  INCOMPATIBLE WITH RFC[25]

  Illegal AgeI site found at 720
  Illegal AgeI site found at 832
  
• 1000
  COMPATIBLE WITH RFC[1000]