Difference between revisions of "Part:BBa K1017404"

Revision as of 13:44, 26 September 2013

sRNA-2

Description of function

Small RNA is an important role on gene regulation. It will interact with the targeted mRNA by imperfect basepairing, reducing the translational efficiency and recruiting chaperones such as Hfq for translational termination.Since we choose sRNA to be part of our regulated-system, we need to prevent the sRNA from effecting undesired genes, so it is necessarily to design artificial sRNA that targets specifically to the desired genes.

How we design

We first picked the sRNA from a library of artificial sRNA that was constructed by fusing a randomized antisense domain of Spot42, the scaffold that is known to recruit the RNA chaperons. As we want the sRNA we picked can specifically complementary to the SD sequence which in our designed RBS(BBa_K1017202[1]), we picked the one which contains a consensus sequence, 5’-CCCUC-3’. Our artificial sRNA also has three stem-loop double stranded RNA structures, and the loop closest to the 3’ terminus is complementary to a sequence preceding the initiation codon of mRNA, so that it can prevent the ribosome from binding to the initiation condon, so the translation would be repressed.

Quantitative data showing the Part or Device function

Acknowedgment of sources and references

Torsten Waldminghaus, Nadja Heidrich, Sabine Brantl and Franz Narberhaus .(2012). Engineering Artificial Small RNAs for Conditional Gene Silencing in Escherichia coli ,1: 6–13 Sequence and Features