Scientists built a precise gene-editing tool for hard-to-modify gut bacteria
Hu Y, Li Q, Li Y, Zeng Y, Zheng L
Microbiome
Soil bacteria and gut bacteria are close cousins in the microbial world, and tools that let scientists precisely engineer one family of microbes often unlock new ways to improve compost microbiomes, soil amendments, and probiotic inoculants for the plants you grow.
Your gut is packed with a family of bacteria called Bacteroides, and they're surprisingly hard to tinker with in the lab. Researchers built a new genetic tool that lets them drop new instructions into these bacteria with high accuracy, kind of like copy-pasting a sentence into a document without disrupting the rest. This opens the door to understanding and eventually redesigning the microbial communities that affect everything from digestion to how we absorb nutrients from food.
Key Findings
STIB achieved greater than 97% on-target gene insertion across multiple Bacteroides species, including non-model species previously resistant to genetic tools.
The system works without homologous recombination, removing a major technical barrier that made Bacteroides editing slow and unreliable.
STIB successfully edited specific Bacteroides species within a complex synthetic gut microbiota, demonstrating species-level precision in a community context.
chevron_right Technical Summary
Scientists developed STIB, a tool that uses CRISPR-related machinery to precisely insert genes into Bacteroides, the bacteria that dominate the human gut. It works across many species, including hard-to-study ones, and was tested successfully in complex microbial communities that mimic the gut.
Abstract Preview
Original paper
Targeted genomic editing of human gut Bacteroides species based on CRISPR-associated transposases.
Gut Bacteroides are abundant and critical to human health, yet most are genetically cumbersome, non-model microbes. A widely applicable editing tool for Bacteroides is essential for gut microbiome ...
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