Part:BBa_K5119017

SpcR FL Promoter

This part is a full-length spectinomycin antibiotic resistance promoter originally found in Streptomyces spectabilis and obtained from pBTK403, a broad-host-range bacterial origin plasmid (Leonard et al., 2018). Through our research, we offer a collection of parts ( BBa_K5119000to BBa_K5119087) that enables researchers to assemble their own plasmid that can replicate in both gram-positive species and E. coli, with the added functionality of secreting enzymes capable of degrading gliadin. Explore the entire collection of parts associated with our project on the Parts page of the UT Austin 2024 iGEM Wiki.

Introduction

About 1% of the world population is affected by celiac disease (Lebwohl et al., 2018), an autoimmune disorder triggered by the ingestion of gluten, a protein commonly found in wheat, barley, and rye (Celiac Disease Foundation, 2024). This immune response can cause significant intestinal damage from chronic inflammation, nutrient malabsorption, and even lactose intolerance, making it crucial to find effective treatments. This is further underscored by the widespread presence of gluten in the human diet. The UT Austin 2024 iGEM team seeks to alleviate the burden of celiac disease by developing a collection of parts capable of secreting proteases in a bacterium specifically designed to degrade gliadin, the primary immunogenic component of gluten (Barone et al., 2014). By engineering this bacterium to break down gliadin in a sustained and localized manner, the team aims to prevent the harmful effects of accidental gluten ingestion, offering a solution to improve the lives of individuals with celiac disease. For more details, please visit our Project Description. Figure 1: The UT-Austin 2024 iGEM parts collection. This collection includes 22 constitutive antibiotic resistance promoters (Type 2),
9 secretion tags (Type 3a), 2 reporter proteins and 4 reporter proteins & enzymes (Type 3b), a rpoC
terminator (Type 4), and 3 plasmid backbones (Type 56781). Created with Biorender.com.

Our parts collection consists of a diverse array of plasmid backbones (Type 56781), promoters (Type 2), signal peptides (Type 3a), and enzyme coding sequences (Type 3b), designed to enable the modular engineering of plasmids that express gliadin-degrading enzymes. Drawing from the methodologies established in the Yeast Toolkit (Lee et al., 2015) and the Bee Microbiome Toolkit (Leonard et al., 2018), our collection allows for the seamless arrangement of genetic parts using type IIS enzymatic Golden Gate Assembly (GGA). Similar to the BTK, our plasmid elements - including broad-host-range promoters, coding sequences, and antibiotic resistance genes - can be independently replaced to optimize performance for specific bacterial hosts. Figure 2: An example of an assembly plasmid containing five part types: a plasmid backbone (Type 56781), a promoter (Type 2), a secretion tag (Type 3a), an enzyme coding region (Type 3b), and a terminator (Type 4). The table provides definitions for part symbols in SBOL language. Created with Biorender.com.

Sequence and Features

Assembly Compatibility:

• 10
  COMPATIBLE WITH RFC[10]
• 12
  COMPATIBLE WITH RFC[12]
• 21
  COMPATIBLE WITH RFC[21]
• 23
  COMPATIBLE WITH RFC[23]
• 25
  COMPATIBLE WITH RFC[25]
• 1000
  COMPATIBLE WITH RFC[1000]