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Revision as of 16:54, 16 September 2019
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Judging
Bronze Requirements
1. Registration and Giant Jamboree Attendance 2. Competition Deliverables Apart from this wiki your are looking, posters and presentations will come to you at Jamboree. Here is our judging form. 3. Attributions See each member's contribution and help from others. 4.(a) Characterization in Interlab We have successfully completed the InterLab Measurement Study and submitted high-quality data. 4.(b) Characterization in Parts We have added new, high quality, experimental characterization data to an existing BioBrick Part from the Registry: J23101
Silver Requirements
1. Validated Part We have designed three new parts related to our project works and documented the characterization on Part's Registry. We followed by successful DNA shippments of these parts. 2. Collaboration See how we established meaningful collaborations with teams all over the world. 3. Human Practices Check our HP overview to see what approaches we used to investigate street cats issue and connect with our communities, and our work is socially responsibile for a better world.
Gold Requirements
1. Integrated Human Practices Our human practice is a mirror to our project, as we were constantly improving our project, applied design and hardware, based on others feedback. 2. Improve a Previous Part We have improved existing part, Part:BBa_J23119, to a new part, Part:BBa_K2753023, and produced experimental data of both parts in comparison. We also followed by successful DNA shippments. 3. Model Modeling tools aid in the rational design and make the engineered system predictable. Visit our Model page to take a closer look. 4. Demonstration Check how our project is repeatable and realistic, and how it is followed by requirements of iGEM Safety Committee.
Special Prizes
Integrated Human Practices
Stray cats is a thorny problem, but we proposed an innovative solution coherent to our project. Through a number of online and field research, we perceived the severity of this problem and broadened our perspective. We thoughtfully incorporated ‘value sensitive design’ throughout our human practice, connecting different stakeholders from the society. In practice, we communicated with stray cat rescue teams for advice, and collaborated with organisations like Maker Space and environmental NGOs to get more information, and furthermore, raise public awareness on this issue. We interviewed many citizens to collect comprehensive opinions and suggestions, which make our design more viable. Moreover, we inquired laws and regulations from relevant governmental departments to community level in order to ensure smooth implementation of our applied design. Above all, we have made a series of documentary about our human practice and the process of conceiving, building and improving our applied design: “Kitty Wonderland”.
Education and Public Engagement
We hosted a workshop on synbio and its application, and hold an exhibition of our project in the international Maker Faire. We discussed with audiences including artists, students, investors and engineers who inquired about the safety and potential of synbio eagerly. And engineers and artists established long-term collaboration with us on applied design. We closely engaged with neighbourhood, urban management agencies and animal welfare groups, presenting how microbial factory can integrate with cat shelter we built to solve the problem of feral cats. Through direct interviews, in-depth conversations, presentations or polls, we learnt their concerns and how synbio-related design can be better accepted by the public. Innovatively, we connect with people in art field by holding activities which allow the public to draw and design the cat shelter. Moreover, we filmed a series of documentaries to reach even further, by uploading them on popular media platforms.
Model
We built an ODE kinetics framework to model the mutualistic co-culture system of E.coli and S.cerevisiae we intended to use in our project, taking into account substrate utilization, product inhibitions and product formation involved in two species’ interactions. By recording the growth of the two engineered strains in co-culture and performing parameter sensitivity analyses, we were able to better interpret the behavior of the system. In addition, we have also devised a model to analyze the relationship between E.coli’s geraniol production level and the copy number of the plasmid containing the two key enzymes for production, GES and GPPS, under the stabilization of different transcription activator-like effectors stabilized promoters(TALEsp) from our promoter library, so as to choose the desired combination for optimal geraniol production. The model can also be applied to choosing TALEsp for other situations involving tuning expressions of genes or maximizing down-stream production stabilized by TALEsp.
Product Design
Free-roaming feral cats have posed a serious threat to public health and biodiversity. The current solution to manage feral cats called Trap&Neuter&Release often fail to control cats’ population due to the difficulties in capturing them. Aiming at the microbial production of nepetalactol, an ingredient in the cat-attracting plant catnip, we proposed the use of microorganism-derived nepetalactol for capturing feral cats and have devised a cat shelter, “Kitty Wonderland” as an implement tool of this idea. Through active communication with animal rescue NGOs, government, and hardware specialists, we optimised the design of Kitty Wonderland overtime, ensuring it’s safe and practical. Nonetheless, the cat shelter may be subjected to vandalism if our society didn’t realise the importance of respecting animals’ life and welfare. Thus, we employed public education as a complimentary component to the Kitty Wonderland.
Hardware
In order to solve the stray cats problem, we devise this hardware, the Kitty Wonderland, to provide homeless stray cats with shelters which could offer them a safe, comfortable and permanent living environment. Through the interviews and discussions we made with specialists, officials and residence, we improve our hardware to combine the merits of existing methods like Trap&Neuter&Release. The hardware assists volunteered caregivers by attracting stray cats and capturing them if necessary, so the difficulties and costs in tracking and taking care of stray cats are greatly reduced. Besides, we apply nepetalactol, which is the focus of our project, to our hardware to make it more effective in attracting cats and emphasize the significance of our project. Finally, our hardware can be easily deployed on various locations in the community where it stresses the stray cats problem to a broad population in an original approach.
Best Part Collection
We created a novel, well-characterized, and well-documented transcription-activator-like effector (TALE) stabilized promoter (TALEsp) collection as well as two parts enabling future teams to create more stabilized promoters. The TALEsp makes gene expression independent of copy number, maintaining a constant and constitutive expression level at any copy. They were cloned on vectors of different copy and were inserted to the genome to be characterized with not only green fluorescence but also with a metabolic engineering setting -- geraniol synthesis. Our results have proven the stabilization effect of the promoters. As building a synthetic biological system requires the correct proportion of each component, but in reality, the cellular environment is usually dynamic and complex, making the engineering process sometimes difficult, this promoter library provides a reliable tool which allows teams to construct predictable and robust synthetic systems.
Best New Basic Part
Please have a look on our favourite basic part: BBa_K2753003.
Best New Composite Part
Have a look on our favourite composite part: BBa_K2753018.
Project Summary
Mutation library generation is critical for biological and medical research, but current methods cannot mutate a specific sequence continuously without manual intervention. Here we present a toolbox for in vivo continuous mutation library construction. First, the target DNA is transcribed into RNA. Next, our reverse transcriptase reverts RNA into cDNA, during which the target is randomly mutated by enhanced error-prone reverse transcription. Finally, the mutated version replaces the original sequence through recombination. These steps will be carried out iteratively, generating a random mutation library of the target with high efficiency as mutations accumulate along with bacterial growth. Our toolbox is orthogonal and provides a wide range of applications among various species. R-Evolution could mutate coding sequences and regulatory sequences, which enables the in vivo evolution of individual proteins or multiple targets at a time, promotes high-throughput research, and serves as a foundational advance to synthetic biology.