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Combination of overlapping bacterial artificial chromosomes by a two-step recombinogenic engineering method
Xin-Mei Zhang1, Jian-Dong Huang
1Department of Biochemistry, The University of Hong Kong, 3/F Laboratory Block, Faculty of Medicine Building, 21 Sassoon Road, Hong Kong SAR, China.
Nucleic Acids Research
|July 31, 2003
Summary
Recombineering enables efficient engineering of large DNA fragments without enzymes. This study demonstrates combining bacterial artificial chromosomes (BACs) to create unified BACs for complex gene constructs.
Area of Science:
- Molecular Biology
- Synthetic Biology
- Genomics
Background:
- Recombinogenic engineering (recombineering) offers enzyme-free DNA manipulation.
- Bacterial artificial chromosomes (BACs) are crucial for cloning large DNA fragments.
Purpose of the Study:
- To develop a general method for combining overlapping BACs using recombineering.
- To construct a unified BAC containing the full tyrosinase-related protein-1 (Tyrp-1) gene.
Main Methods:
- Utilized a two-step homologous recombination strategy mediated by bacteriophage lambda Red proteins.
- Retrieved a large DNA fragment (~22 kb) from one BAC.
- Inserted the retrieved fragment into a second BAC to create a unified BAC.
Main Results:
- Successfully constructed a unified BAC containing the complete Tyrp-1 gene from two separate BACs.
- Demonstrated the feasibility of recombineering for joining large DNA fragments (>20 kb).
- Inserted an additional DNA fragment (~20 kb) into the unified BAC, showcasing method versatility.
Conclusions:
- Recombineering provides a powerful and versatile approach for BAC manipulation and engineering.
- This method facilitates the construction of larger, unified BACs for various applications.
- The technique is broadly applicable for complex DNA assembly and modification.