Part:BBa_K3596028
Pilin Gene mut 4D
BIOT is a basic design for the expression of Geobacter sulfurreducens' pilin-based electrically conductive protein nanowires (e-PNs)[1]. The system includes a tac promoter which promotes the pilin gene(pilA) to express protein monomers; the monomers are later assembled into protein nanowires by the TypeIV pilin assembly system, which is constructed from the gene cluster at the downstream of the pilin gene(figure 1). The e-PNs can generate electric potential with the presence of water molecules in the air, which can be further modified for other purposes.
Figure 1: A Construction of BIOT gene circuit
In order to improve the protein nanowire, we mutated the pilA gene to enhance the productivity and output voltage. This part codes for mutated pilin gene with four more carboxylic groups in each protein monomer(S25D, R41E, K44E, Q55E).The electricity productivity of this part is shown in figure 2.
Figure 2: Electricity productivity of engineered BIOT system with different pilin mutant.
References
[1] Liu X, Gao H, Ward J E, et al. Power generation from ambient humidity using protein nanowires[J]. Nature, 2020, 578(7796): 550-554.
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21COMPATIBLE WITH RFC[21]
- 23COMPATIBLE WITH RFC[23]
- 25COMPATIBLE WITH RFC[25]
- 1000COMPATIBLE WITH RFC[1000]
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