Part:BBa_K3110018
Medium Promoter Weak RBS lldR+lldD
This construct has L-Lactate Dehydrogenase (lldD) and Regulator element (lldR) under the control of a medium promoter and a weak RBS. lldD cleaves L-Lactate to pyruvate and lldR has the dual role of an activator and a repressor. Our intention of using this part is to have control over the detection threshold of L-Lactate by the lldPRD regulatory region. We have also designed other parts which produce various higher and lower concentrations of lldD and lldR by varying the strength of the promoter and RBS controlling their production.
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12INCOMPATIBLE WITH RFC[12]Illegal NheI site found at 7
Illegal NheI site found at 30 - 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25INCOMPATIBLE WITH RFC[25]Illegal NgoMIV site found at 1987
Illegal AgeI site found at 619 - 1000INCOMPATIBLE WITH RFC[1000]Illegal BsaI site found at 1424
Characterization
During the course of our experiments, we had some technical difficulties with SOEing, but we got the first construct for this combination (Strong Promoter Strong RBS lldR lldD) after a few attempts. That SOEed construct was digested and ligated to the plasmid and transformed into DH5alpha, but no positive colonies were obtained on colony PCR. We could not pursue it further due to time constraints, hence the first construct was not characterised. This particular construct was designed by varying the strengths of RBS and promoter for the same lldR + lldD gene combination, but was not SOEed and characterised as we could not standardise the protocols.
Design
Medium promoter-Weak RBS-lldR flank and lldD flank-terminator were synthesized by IDT
lldR+lldD was amplified from the genome
Reference
iGEM ETH zurich 2015
iGEM NUS Singapore 2016
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