Coding

Part:BBa_K3425042

Designed by: Tereza Hubackova   Group: iGEM20_UofUppsala   (2020-10-20)


pelB

pelB is an Erwinia carotovora signal peptide. When attached to the N-terminus of a protein, the protein is directed to the periplasmic membrane of Escherichia coli. Therefore pelB is used to direct fusion proteins to the periplasm.

This particular part is designed to be used together with two other parts (see table below) as the agglutination construct for the NANOFLEX system, as a way to test nanobody functionality. In this case the nanobody BBa_K3425043 specific to the Mycobacterium tuberculosis biomarker HSP 16.3 BBa_K3425041 is displayed. Expression construct of this system is BBa_K3425070.


Part number Name Description
BBa_K3425042 pelB signal peptide
BBa_K3425043 B-F10 HSP Nanobody
BBa_K3425044 ehaA Transmembrane domain

Custom Type IIS design

This construct requires a signal peptide (pelB) at the N-terminal, the transmembrane domain (ehaA) at the C-terminal and the detection module (nanobody) inbetween. The idea behind this design is that, while pelB and ehaA are the same, the nanobody can be exchanged by a nanobody which binds the target you are interested in.

Each of these parts is designed to be cloned with iGEM Type IIS standard into the Level 0 backbone pSB1C00. The three parts together form one CDS, so except the first and last fusion sites, which are part of the standard, the others are custom and annotated in the sequences. The fusion sites are detailed in the table below.

By maintaining the three parts in separate pSB1C00 plasmids you can maintain more than one nanobody and assemble the construct to Level 1 backbones (such as pSB1K01) together with promoter, RBS and terminator in a 6-DNA parts one-step reaction (instead of 4-DNA parts).

5' Fusion site Part 3' Fusion site
FS_c (AATG) pelB pelB_FS
pelB_FS B-F10 ehaA_FS
ehaA_FS ehaA FS_e (GCTT)


Sequence and Features


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]


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Categories
Parameters
None