Dr. Klauer is a researcher studying the mealworm gut microbiome’s ability to degrade plastics, whose work inspired our exploration of Alcanivorax borkumensis for oil degradation when we first began this project. He shared his approach to studying plastic degradation in the context of his research. During our conversation, he explained the multi-step process of alkane (carbon chains) degradation, where the first step involves oxidizing a carbon-carbon bond to make the alkane more chemically accessible in the next steps to come. He suggested we focus on this first step of degradation, as this step often limits overall degradation efficiency. As a result, we decided to focus on identifying candidate proteins from Alcanivorax borkumensis that may be part of this first step of degradation.
Ms. Lieske is the Ocean Planner at the Delaware Department of Natural Resources and Environmental Control (DNREC) and offered us valuable insight on the substantial economic and environmental impact oil spills have on Delaware’s coastal businesses. Since the main goal of our project is to combat oil spills, we knew Ms. Lieske would be able to help us explore the local impact our project could have. Delaware is home to many native species, specifically coastal birds and horseshoe crabs, whose habitats would be heavily impacted by the oil in the ocean. We also learned about the sizable coastal industries of Delaware; our state, specifically Sussex County, relies heavily on recreation and tourism, where oil spills can result in approximately $150 million in detrimental losses. By implementing our research with Alcanivorax Borkumensis in real-world scenarios, we’d be directly supporting those who face the impacts of oil spills the most. Through conversations with Ms. Lieske, we were able to determine the definite benefits our research would provide to our community, an essential part of the lives of animals and Delawareans.
Dr. Sherri Mason is an expert in microplastics where she helped put out ideas for human practices. We originally didn’t have any ideas for testing our bacteria and Dr. Mason recommended a waste water treatment plant where everything can be “condensed” so our bacteria would be put out in a controlled environment. Dr. Mason also confirmed our hypothesis that our bacteria would also be able to degrade the hydrocarbon chains within plastic.
We interviewed Dr. Mason to gain insight on our idea about degradation of plastics with Alcanivorax. Her response confirmed our hypothesis that it is very possible for Alcanivorax to degrade plastics by eating the hydrocarbon chains within the plastic. Also, her insight directed us to look for areas of a controlled environment, such as waste water treatment plants, where we could be able to experiment our bacteria for human practices.
Mr. Saul is currently a PhD student at the University of Delaware working in the Blenner Lab. He works with Alcanivorax as part of his plastic degradation study. He gave us an overview of possible methods to insert a genetic toolbox (ex., plasmid) into Alcanvorax Borkumensis. This included conjugation and transformation strategies. For instance, for our suicide vector, he proposed we use either a transpose system, a CRISPR system, a CasT (cas and transposon) system, or a λ red phage system. His input directly impacted our project as we decided to use a transpose system, which would randomly insert our GFP gene into the chromosomal DNA of the A. borkumensis. Furthermore, he advised we add lysine to the media when doing the conjugation method, as the E.coli used for conjugation doesn’t have the machinery capable of synthesizing lysine. By implementing his feedback into our project, we were successfully able to implement both conjugation (of our suicide vector) and transformation (of our broad range) within our project.
We learned that CHARMM-GUI offered a more precise way of setting up files for Molecular Dynamics simulations, prior to using GROMACs. Furthermore, we obtained clarification to questions relating to why certain features exist in molecular dynamics workflows, such as the presence of Periodic Boundary Conditions in simulation. Lastly, we were able to obtain advice on optimal simulation parameters, such as the necessary simulation runtime and tips to decrease the execution time.
We were able to implement this advice into our workflow by taking into account the recommended simulation parameters and utilizing CHARMM-GUI in our molecular dynamics simulation workflow.
With Ms. Olson being an environmental science teacher to many students and the former iGEM moderator, she was an obvious person to reach out to. She has provided crucial insight into how many communities may be impacted negatively through our project. She explained how our project may cause leftover oils and microplastics to pollute sensitive environments and ecosystems. Furthermore, certain communities like Coastal or Brackish such as Delaware may be impacted through the potential pollution caused. Places like Western Pennsylvania that have high levels of methane, mixed with the oil may cause fires. In addition, it is important that the project is first tested in a controlled environment rather than the ocean as it may lead to severe environmental harm. Ms. Olson’s advice has shown how pollution, specifically oil pollution, may cause drastic harm, especially towards sensitive groups. It is crucial that the project is first tested in a controlled environment to ensure that there is no further impact from the aftermath of the project. Her advice also brings insight on how it is important for the public to understand the harm that oil pollution has on different communities. Through her guidance, she has helped us understand the potential long term impact our project has and how it is crucial to minimize it.
When we originally started this project, we envisioned researching and genetically modifying A. borkumensis to increase its oil degradation abilities. Then, we envisioned our genetically modified A. borkumensis to be introduced into open bodies of water to clean up any oil spills. However, through our conversations with this diverse group of experts, we were able to greatly expand our knowledge and worldview. Through Dr. Klauer, we switched from overexpressing already known genes and editing the genome to identifying new enzymes in A. borkumensis that may be part of the first step of alkane degradation. Mr. Saul, our A. borkumensis expert, gave us great advice on conjugation and transformation strategies for A. borkumensis, which we directly implemented within our project. Over on the dry lab side, we began with a very simple understanding of molecular dynamics, and we were on the trajectory of making simple models that wouldn’t have provided useful information to inform wet lab work. In our conversation with Dr. Jaeger, he taught us key parameters and force field suggestions to simulate a more rigorous and comprehensive model, which would provide valuable insights to wetlab. Ms. Lieske and Ms. Olson, who are more familiar with the societal impact side of our project, gave us insight into who exactly our project would impact locally, from specific marine life to a whole industry of tourism. Dr. Mason gave us advice on real-world implementation, suggesting that we try our project in a wastewater treatment plant before larger-scale execution, which, in addition to understanding potential harmful impacts our project may have on ecosystems, could be a crucial step in getting the general public to trust genetically modified organisms in their water. Dr. Mason also confirmed our project’s potential future applications in degrading plastic. From our interviews, we integrated and refined our view on the application of our research and the research direction itself. Through multiple interviews, we realized the potential harm of releasing genetically modified organisms and the potential biocontainment issues that may arise. We pivoted our application in favor of a wastewater treatment facility where oil spill water samples would be treated with our A. borkumensis to efficiently degrade the oil in a contained environment. We are very thankful for our meetings and discussions with these experts, and we will continue to refine our project according to their advice, meeting more experts along the way.