Part:BBa_K1489000
pBAD-RBS-Bovine Galectin-1-B0012 Terminator
His-tagged soluble beta-galactoside binding protein (galectin) originally from Bos taurus. Bovine galectin 1 is expressed both intracellularly and extracellularly, where they serve to binding various types of beta-galactosides and initialize signal cascades. BtGal1 is believed to be a dimer in its active form, as is true with most mammalian galectins. This protein is his-tagged in order to ease protein purification and western blot recognition assays.
This biobrick is under the pBAD promoter (BBa_K206000) with attached RBS (BBa_B0034), and utilizes an additional RNA polymerase terminator (BBa_B0012).
UMaryland 2014 is interested in utilizing this part to investigate whether E. coli can recognize and bind to surface carbohydrates on a marine pathogen. Other uses of this part lie in the recognition of various carbohydrate ligands and potential activation of signal transduction pathways.
Expression Test:
BBa_K1489000 was transformed into chemically competent DH5-alpha cells and plated overnight with chloramphenicol challenge. One colony was incubated in 5 mL LB media + 34 ug/mL chloramphenicol and grown to mid-log phase at 37oC. Arabinose was added to a final concentration of 0.2% to initiate protein production and cells were re-incubated at 37 oC for 21 hours. Cells were then pelleted and lysed with 10% SDS solution. Cell lysate was centrifuged at 13200 rpm in a tabletop centrifuge for 1 hour to separate soluble and insoluble fractions. Both fractions were loaded on an SDS-PAGE gel for western blot analysis using anti-His antibodies.
Clear band of correct size can be seen in the soluble induced fraction, while no band is seen in the uninduced cells.
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12INCOMPATIBLE WITH RFC[12]Illegal NheI site found at 125
- 21INCOMPATIBLE WITH RFC[21]Illegal BamHI site found at 65
Illegal XhoI site found at 499 - 23COMPATIBLE WITH RFC[23]
- 25COMPATIBLE WITH RFC[25]
- 1000COMPATIBLE WITH RFC[1000]
| None |