Recombineering BAC transgenes for protein tagging

Area of Science:

• Molecular Biology
• Proteomics
• Genomics

Background:

• Protein tagging is crucial for proteomic and regulomic research, offering sensitive detection methods.
• Overexpression artifacts from cDNA vectors compromise the advantages of protein tagging.
• Physiological protein expression requires maintaining native regulatory elements.

Purpose of the Study:

• To develop a method for protein tagging using bacterial artificial chromosomes (BACs).
• To enable protein expression at physiological levels, preserving native regulatory contexts.
• To overcome limitations associated with protein overexpression from cDNA expression vectors.

Main Methods:

• Utilized recombineering for efficient modification of large BAC constructs.
• Developed a protocol for protein tagging within BAC transgenes.
• Transfected cells with tagged BACs and evaluated protein expression.

Main Results:

• Successfully tagged proteins using BACs via recombineering.
• Demonstrated the feasibility of expressing tagged proteins at physiological levels.
• Validated the method for proteomic and regulomic applications.

Conclusions:

• Recombineering-based BAC protein tagging provides a robust approach for studying protein function in native contexts.
• This method overcomes overexpression issues, enabling more accurate proteomic and regulomic analyses.
• The technique facilitates research requiring precise control over protein expression levels and regulation.