Coding

Part:BBa_K1321341

Designed by: Chris N Micklem   Group: iGEM14_Imperial   (2014-10-08)

sfGFP fused to CBDclos in RFC 25

Super-folder GFP fused N-terminally to CBDclos (a cellulose-binding domain).

This construct is part of a library of sfGFP fusions with cellulose binding domains, which we used to assay the CBD binding affinity. Please see our project page for more information. The collection of sfGFP-CBD fusion parts can be seen in the table below: IC14-sfGFP-part-table.PNG

Note that the start and stop codon, plus 6 bp either side of the sequence, are included the RFC25 prefix and suffix which is not shown.

As part of our project we carried out an assay to determine the relative binding ability of CBD-sfGFP and sfGFP fusions to bacterial cellulose.

Our first assay was performed to determine the relative strengths of various CBDs’ binding to bacterial cellulose. These were represented by the percentage fluorescence left from CBDs fused to (sfGFP (RFC25)) bound to bacterial cellulose discs, when subjected to various washes. Full protocol can be found (here)

In the same assay, results suggested that dCBD, CBDcex and CBDcipA (all fused to sfGFP) had greater ability to bind bacterial cellulose than C-terminal CBDclos. Three washes with dH2O, PBS and 5% BSA were carried out to monitor binding strength. It was determined that the fusion with C-terminal CBDclos was, on average, our fourth strongest CBD, in comparison other CBDs tested.


Figure 1 - CBD binding strength after three dH2O washes.
Figure 2 - CBD binding strength after three 70%Ethanol washes
Figure 3 - CBD binding strength after three PBS washes
Figure 4 - CBD binding strength after three BSA washes


Assembly Compatibility:
  • 10
    COMPATIBLE WITH RFC[10]
  • 12
    COMPATIBLE WITH RFC[12]
  • 21
    COMPATIBLE WITH RFC[21]
  • 23
    COMPATIBLE WITH RFC[23]
  • 25
    COMPATIBLE WITH RFC[25]
  • 1000
    COMPATIBLE WITH RFC[1000]


[edit]
Categories
//binding/cellulose
//cds/reporter/gfp
Parameters
None