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[iGEM 2018 UI_Indonesia] Experiment with HB-EGF/Tar (HT) Receptor (BBa_K2607001)

We performed experiment to study the interaction between DiphTox (DT) (BBa_K2607000) and HB-EGF/Tar (HT) receptor (BBa_K2607001) using binding assay and luminescence (Promega's ADP-Glo^TM Kinase) assay. Figure 1 shows complete workflow of this experiment.

Figure 1. Original plan workflow to study interaction between DT (BBa_K2607000) and HT (BBa_K2607001).

DT and HT Cloning Upon receiving DT and HT (in gBlocks) from Integrated DNA Technologies, Inc. (IDT), we performed PCR to amplify the gBlocks. PCR amplification for all gBlocks used the hand-made designed forward (Fwd) and reverse (Rev) cloning primers. Furthermore, cycling formula for PCR cloning and confirmation could be accessed in the lab notes, as we applied GoTaqTM Long PCR enzyme as the Hi-Fi polymerase. The amplified gBlocks were then used as inserts to plasmid vectors. For HT BioBrick, IDT was unable to yield the full sequence in high purity, so we had to split HT into two fragments (HT-1 and HT-2), which would later be amplified, restricted with SalI, and ligated to obtain complete HT fragment. On the other hand, we also prepared vectors for carrying our parts. Backbone pSB1C3-mRFP (BBa_J04450) has been used widely in our process of traditional cloning, for it provides much sensitive selection upon transformed recombinant plasmids. Since this plasmid does not contain any available expression promoter for the designed BioBrick, our supervisor suggested the usage of pQE80L expression vector belonged to IHVCB lab for functional assays and analyses. Therefore, we used pSB1C3 as cloning vector for submission to iGEM Headquarters and pQE80L as cloning vector for expression. We conducted traditional cloning (restriction-ligation) method to introduce our previously amplified inserts into prepared vectors. Restriction digestion was done sequentially with EcoRI and PstI in total of 8 hours by using the same buffer (i.e. EcoRI buffer and bovine serum antigen (BSA) 1X) with a minimum DNA template of 10 µg. Desalting and low-melting agarose (LMA) 1% electrophoresis purification was done to further remove any possible contaminating enzymes and undesired polynucleotides. Ligation of both vectors and inserts were conducted by adding T4 ligase and its respective buffers to be later incubated 160C overnight. Transformation of resultant recombinant plasmids was done in wild-type E. coli K-12 (for submission purpose) and BL21(DE3) (for characterization and validation purpose) via “transformation protocol” methods in the other page. To enhance selection of recombinant E. coli, the transformed products were spread into selective LB agar containing appropriate antibiotic. Antibiotic formulation was complied to the lab’s proven antibiotics sensitivity test. We solubilized the powdered chloramphenicol in ethanol 95% and ampicillin in distilled water until final concentration of 25 mg/ml and 100 mg/ml, respectively. They were then added into LB media with ratio of 1:1000. After spread into LB agar, the transformed products were then incubated at 370C overnight. In the case of transformation with pSB1C3, to select the colony with desired inserts, we performed red-white screening. If the grown colonies were red, it indicated that the colonies were transformed by native pSB1C3-mRFP and we excluded the colonies. We only picked white colonies (indicated that mRFP had been successfully removed from pSB1C3 and possibly replaced by insert) to be further confirmed for desired insert presence by colony PCR. We used VF2 and VR primers (i.e. iGEM standard primers) for confirmation of inserts in pSB1C3, while we used our hand-made designed primers for confirmation of inserts in pQE80L. Finally, we performed mini-prep plasmid isolation for any confirmed colonies with desired inserts in pSB1C3. We grew the colonies in LB liquid medium at 370C shaken overnight. Sequencing was performed to confirm the sequence of inserts before submitted to iGEM Headquarters.

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UNIQa0fd4fd6972711f0-partinfo-00000000-QINU UNIQa0fd4fd6972711f0-partinfo-00000001-QINU

@@ Line 8: / Line 8: @@
 [[File:T--UI_Indonesia--Figure1DT.png|thumb|center|<b>Figure 1.</b> Original plan workflow to study interaction between DT (BBa_K2607000) and HT (BBa_K2607001).
 ]]
+<b>DT and HT Cloning</b>
+Upon receiving DT and HT (in gBlocks) from Integrated DNA Technologies, Inc. (IDT), we performed PCR to amplify the gBlocks. PCR amplification for all gBlocks used the hand-made designed forward (Fwd) and reverse (Rev) cloning primers. Furthermore, cycling formula for PCR cloning and confirmation could be accessed in the lab notes, as we applied GoTaqTM Long PCR enzyme as the Hi-Fi polymerase. The amplified gBlocks were then used as inserts to plasmid vectors. For HT BioBrick, IDT was unable to yield the full sequence in high purity, so we had to split HT into two fragments (HT-1 and HT-2), which would later be amplified, restricted with SalI, and ligated to obtain complete HT fragment.
+On the other hand, we also prepared vectors for carrying our parts. Backbone pSB1C3-mRFP (BBa_J04450) has been used widely in our process of traditional cloning, for it provides much sensitive selection upon transformed recombinant plasmids. Since this plasmid does not contain any available expression promoter for the designed BioBrick, our supervisor suggested the usage of pQE80L expression vector belonged to IHVCB lab for functional assays and analyses. Therefore, we used pSB1C3 as cloning vector for submission to iGEM Headquarters and pQE80L as cloning vector for expression.
+We conducted traditional cloning (restriction-ligation) method to introduce our previously amplified inserts into prepared vectors. Restriction digestion was done sequentially with EcoRI and PstI in total of 8 hours by using the same buffer (i.e. EcoRI buffer and bovine serum antigen (BSA) 1X) with a minimum DNA template of 10 µg. Desalting and low-melting agarose (LMA) 1% electrophoresis purification was done to further remove any possible contaminating enzymes and undesired polynucleotides. Ligation of both vectors and inserts were conducted by adding T4 ligase and its respective buffers to be later incubated 160C overnight.
+Transformation of resultant recombinant plasmids was done in wild-type E. coli K-12 (for submission purpose) and BL21(DE3) (for characterization and validation purpose) via “transformation protocol” methods in the other page. To enhance selection of recombinant E. coli, the transformed products were spread into selective LB agar containing appropriate antibiotic. Antibiotic formulation was complied to the lab’s proven antibiotics sensitivity test. We solubilized the powdered chloramphenicol in ethanol 95% and ampicillin in distilled water until final concentration of 25 mg/ml and 100 mg/ml, respectively. They were then added into LB media with ratio of 1:1000. After spread into LB agar, the transformed products were then incubated at 370C overnight.
+In the case of transformation with pSB1C3, to select the colony with desired inserts, we performed red-white screening. If the grown colonies were red, it indicated that the colonies were transformed by native pSB1C3-mRFP and we excluded the colonies. We only picked white colonies (indicated that mRFP had been successfully removed from pSB1C3 and possibly replaced by insert) to be further confirmed for desired insert presence by colony PCR. We used VF2 and VR primers (i.e. iGEM standard primers) for confirmation of inserts in pSB1C3, while we used our hand-made designed primers for confirmation of inserts in pQE80L.
+Finally, we performed mini-prep plasmid isolation for any confirmed colonies with desired inserts in pSB1C3. We grew the colonies in LB liquid medium at 370C shaken overnight. Sequencing was performed to confirm the sequence of inserts before submitted to iGEM Headquarters.
 ===User Reviews===