Part:BBa_K3002202
L2 spectinomycin resistance + cCA_Mut-PETase + cCA_MHETase
This composite part contains a spectinomycin resistance (BBa_K3002102), the Mutant PETase (BBa_K3002106) and the wildtype MHETase (BBa_K3002113), both are fused with an HA-tag for easy detection via HA-antibody and with the secretion signal cCA.
The construct encodes the secretion signal cCA in front of the MUT-PETase gene and a cCA secretion signal upstream to the MHETase gene. As selection marker an aadA cassette is used. Constructs encoding the cCA secretion signal upstream to the MUT-PETase gene show no detectable secretion of said protein. The construct containing cCA leads in comparison to the other secretion signals to the highest yield of MHETase. Both enzymes are crucial for the degradation of PET into its terephthalic acid and ethylene glycol.
The SP20 module increases the efficiency of protein secretion. (a) Level 2 MoClo constructs harboring the aadA selection marker, and the coding sequences for MUT-PETase and MHETase equipped with the secretion signals introduced in Figure 6. The constructs contain the coding sequence for a conventional 3xHA tag (C, K, L), or the 3xHA tag preceded by a SP20 tag to enhance glycosylation (M, N, O). See Figure 1 for the description of other parts. (b) UVM4 transformants containing the constructs C (BBa_K3002200), K (BBa_K3002210), L (BBa_K3002211) and M (BBa_K3002212), N (BBa_K3002213), O (BBa_K3002214) were grown in TAP medium for seven days. Cells were centrifuged and the supernatant lyophilized, resuspended in 2xSDS buffer and analyzed by SDS-PAGE and immunoblotting with an anti-HA antibody. Transformant A27 introduced in Figures 4, served as positive control. The black arrow points to MHETase, the white arrow to MUT-PETase and the grey arrow to RPL1 (chloroplast ribosomal 50S protein L1). The RPL1 antibody was used to detect contamination from intracellular proteins.
Quantification of secreted MHETase and MUT-PETase. (a) Transformants generated with constructs C, J, M, N, and O (Figure 8) were grown in TAP medium for seven days. Cells were centrifuged and the supernatant lyophilized, resuspended in 2xSDS buffer and analyzed by SDS-PAGE and immunoblotting with an anti-HA antibody. Whole-cell extracts of strain B1-TIG-HA for which concentrations of the HA-tagged TIG protein are known are loaded next to the lyophilized supernatants. The black arrow points to MHETase, the white arrows to MUT-PETase. The supernatant of a culture with the UVM4 strain were loaded as negative control. (b) Maximum cell densities, doubling times, daily growth rates, yields of MHETase and PETase and daily productivity of both combined were calculated for the transformant lines indicated.
The Chlamy Yummy Project Collection
We are proud to present our MoClo part collection for C. reinhardtii - the Chlamy Yummy project collection.
These 67 parts are all parts used during our project and were specifically designed and codon optimized for Chlamydomonas. Among them are basic parts (L0) of a novel mutant of the PETase (BBa_K3002014), the wildtype PETase and MHETase as well as a variety of functional composite parts (L1+2). Containing different tags as well as selection markers, this collection serves as a perfect base for plastic degradation projects with Chlamydomonas. These parts were tested and optimized thoroughly and we can guarantee that they work 100%. Because this is a MoClo collection, the parts are highly standardized for worldwide application. The combination with other part collections works fast and easy. While in MoClo, nomenclature is a bit different from the iGEM BioBricks, it is quickly explained:
Level 0 parts are equivalent to basic parts, e.g. Promoters, coding sequences, etc.
Level 1 parts are combinations of basic parts and usually form functional transcription units.
Level 2 parts are combinations of Level 1 parts, in case you want to transfer multiple transcription units at once. For example, you can pair your gene of interest with a selection marker.
The great thing about the Kaiser Collection and MoClo is that the ligation works in a one pot, one step reaction, as the Type IIs restriction enzymes cut out their own recognition sites. This way, multiple constructs can be combined linearly in a fixed order to create complex structures. This is ensured by the standardized overlaps that assign the parts one of 10 positions in the final constructs. After trying MoClo once, you won’t go back to traditional ligation. It is incredibly easy and reliable. Visit our parts site to get an overview over all parts.
Sequence and Features
- 10INCOMPATIBLE WITH RFC[10]Illegal EcoRI site found at 2401
Illegal EcoRI site found at 5297
Illegal PstI site found at 3485
Illegal PstI site found at 4458
Illegal PstI site found at 6639
Illegal PstI site found at 6963
Illegal PstI site found at 7306
Illegal PstI site found at 8116 - 12INCOMPATIBLE WITH RFC[12]Illegal EcoRI site found at 2401
Illegal EcoRI site found at 5297
Illegal NheI site found at 2665
Illegal NheI site found at 5561
Illegal PstI site found at 3485
Illegal PstI site found at 4458
Illegal PstI site found at 6639
Illegal PstI site found at 6963
Illegal PstI site found at 7306
Illegal PstI site found at 8116
Illegal NotI site found at 6974 - 21INCOMPATIBLE WITH RFC[21]Illegal EcoRI site found at 2401
Illegal EcoRI site found at 5297
Illegal BglII site found at 7884 - 23INCOMPATIBLE WITH RFC[23]Illegal EcoRI site found at 2401
Illegal EcoRI site found at 5297
Illegal PstI site found at 3485
Illegal PstI site found at 4458
Illegal PstI site found at 6639
Illegal PstI site found at 6963
Illegal PstI site found at 7306
Illegal PstI site found at 8116 - 25INCOMPATIBLE WITH RFC[25]Illegal EcoRI site found at 2401
Illegal EcoRI site found at 5297
Illegal PstI site found at 3485
Illegal PstI site found at 4458
Illegal PstI site found at 6639
Illegal PstI site found at 6963
Illegal PstI site found at 7306
Illegal PstI site found at 8116
Illegal NgoMIV site found at 1401
Illegal NgoMIV site found at 1584
Illegal NgoMIV site found at 1694
Illegal NgoMIV site found at 3220
Illegal NgoMIV site found at 3247
Illegal NgoMIV site found at 4898
Illegal NgoMIV site found at 6572 - 1000COMPATIBLE WITH RFC[1000]
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