Related Experiment Video
Updated: May 8, 2026
13:51
The MultiBac Protein Complex Production Platform at the EMBL
Published on: July 11, 2013
BAC manipulations for making BAC transgene arrays
Nimish Khanna1, Qian Bian, Matt Plutz
1Department of Cell and Developmental Biology, University of Illinois, Urbana, IL, USA.
Methods in Molecular Biology (Clifton, N.J.)
|August 28, 2013
Summary
Bacterial artificial chromosome (BAC) transgenes offer a novel method for creating stable artificial chromosome blocks. This approach improves upon plasmid arrays by enhancing transcriptional levels and nuclear targeting for chromosome dynamics studies.
Area of Science:
- Molecular Biology
- Genetics
- Cell Biology
Background:
- Chromosome tagging with operator repeats enables in vivo visualization of chromosome dynamics.
- Transgene arrays are used to study chromatin structure, transcription, replication, and DNA repair.
- Previous methods using plasmid arrays or gene amplification faced issues with heterochromatic properties and chromosome instability.
Purpose of the Study:
- To develop a more stable and effective method for creating artificial chromosome blocks for studying chromosome dynamics.
- To leverage bacterial artificial chromosomes (BACs) for building transgene arrays with improved properties.
Main Methods:
- Utilizing large genomic DNA inserts cloned in BACs to construct transgene arrays.
- Employing Tn5 transposition and BAC recombineering techniques to modify BACs.
- Inserting operator repeats and selectable markers into BACs.
- Performing targeted insertion or deletion of BAC sequences.
Main Results:
- BAC transgenes demonstrate transcriptional levels comparable to endogenous genes.
- BAC transgenes exhibit specific nuclear compartment targeting, mirroring endogenous gene behavior.
- The developed methods allow for the creation of stable BAC transgene arrays.
Conclusions:
- BAC-based transgene arrays provide a robust platform for studying chromosome dynamics.
- These arrays overcome limitations of previous methods, offering enhanced stability and gene expression.
- The described retrofitting methods enable precise engineering of BACs for array construction.
