Team:DTU Denmark/parts

This destabilization sequence for rapid protein turnover consists on the C-terminal domain of Saccharomyces cerevisiae cyclin 2 (CLN2) gene. It has been shown that this region of the protein, which is rich in PEST motifs, leads to a destabilization of a protein. Hence this Tag can be used to increase the turn-over rate of a protein. In the article by Mateus and Avery: "Destabilized green Fluorescent protein for monitoring dynamic changes in yeast gene expression with flow cytometry" they show that addition of these 178 carboxyl-terminal amino acid residues changes the half-life of a GFP from 7h and down to 30 minutes.

This constitutively expressed GFP, originally from Aequorea victoria was codon optimized and developed as a reporter for gene expression in Saccharomyces cerevisiae according to Cormak et al (1997). In addition, two amino acid changes were included enabling a far more bright florescence compared to the wild type in E.coli. Maximum absorbance: 490 nm.

This biobrick is made from 1+2 as a prof of concept of the 2 previous biobricks and very useful itself. A fast degradable GFP that has a half-life of 30 min. This variant of biobrick BBa_K194001 has been destabilized by fusing biobrick BBa_K194000. In the article by Mateus and Avery: "Destabilized green Fluorescent protein for monitoring dynamic changes in yeast gene expression with flow cytometry" they show that addition of these 178 carboxyl-terminal amino acid residues of the Cln2 PEST signal, changes the half-life of a GFP from 7h down to 30 minutes.

This biobrick will allow insertion of PCR fragments using the novel USERTM biobrick assembly standard. It contains a PacI/Nt.BbvCI USER cassette for insertion of PCR fragments using the USER cloning standard. PCR fragments containing uracil is treated with a uracil DNA glycosylase that removes the uracil exposing a predesigned 8bp overhang allowing for cloning without the need for ligase