"

From 2012.igem.org

Ordered gBlock fragments are nearly here!

Soon our gBlock fragments will arrive from IDT. On Tuesday (4/09/2012) we will perform Gibson assembly will assemble the following four biobricks:

• +T7 promoter Agrobacterium tumefaciens bacteriophytochrome
• -T7 promoter Agrobacterium tumefaciens bacteriophytochrome
• +T7 promoter Heme oxygenase
• -T7 promoter Heme oxygenase

Click on each above to see the corresponding fragment nucleotide sequence and fragment properties.

BioBrick name	Fragment(s)
T7 Heme oxygenase	Hemo_T7_A + Hemo_B + Plasmid
Heme oxygenase (T7 minus)	Hemo_A + Hemo_B + Plasmid
T7 Agrobacterium	Agro_T7_A + Agro_B + Agro_C + Agro_D + Agro_E + Plasmid
Agrobacterium (T7 minus)	Agro_A + Agro_B + Agro_C + Agro_D + Agro_E + Plasmid

Once the Deinococcus Radiodurans fragments arrive we will assemble them using Gibson assembly. Due to the large sequence of the D. radiodurans bacteriophytochrome, the fragments will be assembled without a T7 promoter. The designed sequences of the 5 fragments can be viewed here

BioBrick name	Fragment(s)
Deinococcus radiodurans bacteriophytochrome	Deino_A + Deino_B + Deino_C + Deino_D + Deino_E + Plasmid

We had experienced delays in receiving our gBlock fragments due to high GC content in the designed fragments which would have caused problems with hairpin loop formation and thus we had to reduce the GC content. By reducing the GC content of certain fragments, we were forced to change the 30 bp overlap sequence in order for these sequences to overlap during Gibson Assembly. At one stage, Deino_A contained 80% GC content and thus had to be altered in order for synthesis by IDT to begin.