Week2 DNA DESIGN

First of all I thank the team from Chi Town Bio for supporting me as a committed listener. At the same time: this is the week that I asked myself, “What did I get myself into?!”

I realize I have a long way to go, so please bear with me. AI is a helpful tool. In addition I am also getting a boothcamp from https://learn.gfi.org/courses/The-Protein-Transition A FREE online self-paced course with 5 modules about the biological and chemical processes used to produce plant-based, fermentation-derived, and cultivated meat, as well as the environmental and economic drivers behind these market sectors.

Expression target (Work in progress)

What molecule are you expressing? A protein, an RNA, or an enzyme (or small set of enzymes) for a pathway.

If your HW1 product is a material, identify the protein(s) that produce it and design for those.

SCOBY DNA in Fermentation (Kombucha) • Microbial Consortium: A traditional kombucha SCOBY is a cellulose-rich biofilm housing a complex community of about 50 identifiable microbial species (bacteria and fungi/yeast). • DNA Sequencing Methods: Scientists sequence the SCOBY DNA Sequencing Study using techniques like 16S rRNA gene sequencing (for bacteria) and ITS amplicon sequencing (for fungi/yeasts). • Core Taxa: Genetic mapping shows that dominant genera usually include acetic acid bacteria like Komagataeibacter (such as K. rhaeticus) and yeasts like Brettanomyces or Zygosaccharomyces. https://share.google/aimode/UKW2Q0cgoRD5W8Zgq

When Etlingera elatior (commonly known as torch ginger or kecombrang) flowers or extracts are introduced into a kombucha substrate, they form a specialized symbiotic culture of bacteria and yeast (SCOBY). Because Etlingera elatior is highly rich in phytochemicals—such as flavonoids, saponins, polyphenols, and essential oils (containing dodecanal)—the chemical landscape drastically alters the microbial DNA profile compared to traditional black tea kombucha. The natural antimicrobial profile of torch ginger acts as a selective filter, creating a distinct microbial fingerprint.

What is the sequence? Give the protein or RNA sequence, or the specific gene, you will encode, and say where it comes from (a database accession such as UniProt or NCBI, a known part, or de novo). Cite it.

Sequencing and Data Generation Workflow When scientists extract and construct this precise DNA profile from a sample, the layout follows a standardized workflow:

[ SCOBY Pellicle + Plant Fluid ] │ ▼ [ Metagenomic DNA Extraction ] │ ┌────────┴────────┐ ▼ ▼ [ 16S rRNA Amplification ] [ ITS Region Amplification ] (Targeting Fungal/Yeast DNA) (Targeting Bacterial DNA) │ │ │ └────────┬────────────────┘ ▼ [ Next-Gen Sequencing (NGS) ] (e.g., Illumina MiSeq Platforms) │ ▼ [ Bioinformatics Pipeline ] (Trimming ➔ Clustering ➔ OTU Assignment) │ ▼ [ Relative Abundance Taxonomy Map ] (The Final Microbial Footprint Model)

SOURCE: Tanti Juwita, Irma Melyani Puspitasari and Jutti Levita, 2018. Torch Ginger (Etlingera elatior): A Review on its Botanical Aspects, Phytoconstituents and Pharmacological Activities. Pakistan Journal of Biological Sciences, 21: 151-165.

DOI: 10.3923/pjbs.2018.151.165

URL: https://scialert.net/abstract/?doi=pjbs.2018.151.165

What host or chassis? The living system from HW1, for example E. coli, S. cerevisiae, CHO or another mammalian line, or a cell-free system. Your host drives almost every part choice that follows.

Through metagenomic mapping (such as 16S rRNA sequencing for bacteria and ITS sequencing for fungi/yeast), the microbial DNA composition typically breaks down as follows:

  1. Acetic Acid Bacteria (AAB) ProfileBacteria are highly adaptive to the phytochemical-dense torch ginger medium. Total bacterial counts heavily multiply during fermentation (often reaching over (10^{13}\text{ CFU/mL})), driven by resilient strains: journal.unnes.ac.idKomagataeibacter xylinus: The primary architect. Its DNA is highly prevalent because it transcribes genes responsible for secreting the dense network of crystalline cellulose that forms the structural SCOBY pellicle. mun kombucha +1Acetobacter aceti & Acetobacter pasteurianus: These strains show metabolic persistence in torch ginger. They possess genes that oxidize ethanol into acetic acid while synthesizing gluconic and glucuronic acids. ResearchGate +1Gluconobacter oxydans: Frequently identified via 16S sequencing. It primarily handles the early stages of glucose oxidation. ResearchGate

  2. Yeast (Fungal ITS) Profile Yeasts process the sucrose into simpler sugars (glucose and fructose) and ethanol. While torch ginger extracts can slightly decrease overall yeast density over prolonged fermentation, dominant fungal DNA profiles still belong to: Saccharomyces sp. & Saccharomyces cerevisiae: Known for their robust genetic toolkit for sugar conversion and high tolerance to plant polyphenols. Brettanomyces sp. / Dekkera: Common in local Southeast Asian kombucha strains. They contribute heavily to complex aroma profiles. Schizosaccharomyces pombe: Highly osmotolerant yeasts whose genomic fragments are consistently mapped in alternative floral fermentations.

  3. Synergistic Dynamics & Antimicrobial Properties The DNA footprint of an Etlingera elatior SCOBY reflects a community designed to combat external pathogens. The combination of the plant’s native chemical compounds and the organic acids generated by the SCOBY creates a powerful defensive system. Genetic expressions from this micro-ecosystem successfully suppress common environmental spoilage organisms and human pathogens, including Staphylococcus aureus, Escherichia coli, Salmonella typhi, and Bacillus cereus.

A visual model of a metagenomic DNA footprint (derived from high-throughput 16S rRNA and ITS amplicon sequencing) outlines how the relative abundance of microbial taxa shifts when a standard SCOBY matches with an Etlingera elatior (torch ginger) flower substrate. Below is a structured structural distribution model representing the metagenomic footprint of an Etlingera elatior SCOBY culture:

📊 Metagenomic Footprint Model

INSERT PICTURES

Where does the product need to go? Cytoplasm, secreted, membrane, or a compartment? This decides whether you need a signal peptide or targeting sequence.

An interactive 3D molecular simulation of a microbial biofilm model visualizes how the different components of an Etlingera elatior SCOBY mesh together at a microscopic scale. This model displays the dense extracellular polymeric substance (EPS) matrix, highlighting the spatial layout of bacteria, yeast cells, and extracellular DNA strands running through the crystalline cellulose scaffolding: AI-generated. Don’t enter sensitive personal info. 🔬 Spatial Matrix Architecture At the microstructural level, the Etlingera elatior SCOBY layout divides into distinct functional zones:

  1. The Structural Scaffolding: Dense, microfibrillar networks of cellulose woven mainly by Komagataeibacter xylinus.
  2. The Microbial Clusters: Rod-shaped Acetic Acid Bacteria (AAB) grouped together near the oxygen-rich surface interface. Larger, spherical or oval yeast cells (Saccharomyces, Brettanomyces) occupy the interstitial pockets below.
  3. The Extracellular DNA (eDNA) Net: Strands of eDNA run throughout the matrix. They act as a physical stabilizing wire and facilitate horizontal gene transfer (HGT) among highly competitive bacterial colonies facing the chemical pressures of torch ginger extracts.

https://share.google/aimode/4CLr1LiMed1NMt3Ec

Reference list

https://pmc.ncbi.nlm.nih.gov/articles/PMC6526554/#sec2

Tanti Juwita, Irma Melyani Puspitasari and Jutti Levita, 2018. Torch Ginger (Etlingera elatior): A Review on its Botanical Aspects, Phytoconstituents and Pharmacological Activities. Pakistan Journal of Biological Sciences, 21: 151-165. DOI: 10.3923/pjbs.2018.151.165 URL: https://scialert.net/abstract/?doi=pjbs.2018.151.165

https://share.google/aimode/4CLr1LiMed1NMt3Ec