Difference between revisions of "Part:BBa K2378005"

Revision as of 17:32, 1 November 2017

Constitutive PETase Coding Device

This is optimized coding sequence of PETase enzyme for E. coli BL21 with the addition of constitutive promoter BBa_J23106.

SEM (Scanning Electron Microscopy) Analysis

In order to observe the ability of our bacteria (transformed with BBa_K2378005) to degrade PET plastic via PETase gene embedded in this part, we ran a qualitative SEM analysis. PET plastic bottles were cut into 1x1 cm fragments with uniform weights. The plastic fragments were then washed with ethanol and water, followed by incubation in LB media contaning the bacterial transformants for 2 days. Following that, the plastic fragments were once again washed, dried, and finally observed under Scanning Electron Microscope (SEM). As the control, the plastic fragments were treated with bacterial cells without plasmid containing PETase.

SEM results show significantly rougher surface with more cracks in samples treated with BBa_K2378005 transformants, having access to PETase gene, compared to its control. We can thus conclude that BBa_K2378005 works as intended in biodegrading PET plastics.

SEM results show significantly rougher surface with more cracks in samples treated with BBa_K2378006 transformants, having access to PETase gene, compared to its control. We can thus conclude that BBa_K2378005 works as intended in biodegrading PET plastics.

Figure 1. SEM result of plastic fragment incubated with control BL21 cells bearing no plasmid

Figure 2. SEM result of plastic fragment incubated with BL21 cells transformed with BBa K2378005 shows rougher surface with more cracks

Sequence and Features