Engineering Agrobacterium tumefaciens Adhesion to Target Cells

Area of Science:

• Microbiology
• Synthetic Biology
• Biotechnology

Background:

• Agrobacterium tumefaciens is widely used for crop genetic modification.
• Its DNA transfer efficiency is limited in many hosts, including animal cells.
• Improving host targeting can enhance DNA transfer for biotechnological applications.

Purpose of the Study:

• To engineer Agrobacterium tumefaciens with enhanced and specific adhesion to alternative host cells.
• To demonstrate improved DNA/protein transfer to non-natural hosts.

Main Methods:

• Engineered a surface adhesin system using an autotransporter gene (Aat).
• Displayed synthetic adhesins, including VHH domains, on A. tumefaciens.
• Tested adhesion to yeast and mammalian cells expressing GFP receptors.
• Assessed protein translocation into HeLa cells using a split luciferase reporter.

Main Results:

• Successfully engineered A. tumefaciens to display synthetic adhesins.
• Demonstrated targeted adhesion to yeast and mammalian cells.
• Showed enhanced protein transfer into HeLa cells compared to wild-type bacteria.

Conclusions:

• Engineering A. tumefaciens adhesion enhances its targeting capabilities for non-natural hosts.
• This approach has potential for improving DNA transfer efficiency.
• Synthetic adhesion engineering can facilitate the creation of complex cellular assemblies.