Oligomerized pool engineering (OPEN): an 'open-source' protocol for making customized zinc-finger arrays.

Area of Science:

• Molecular Biology
• Genetics
• Biotechnology

Background:

• Engineered zinc-finger nucleases (ZFNs) are powerful tools for targeted eukaryotic genome modification.
• Previous methods for engineering ZFNs, such as modular assembly, have limitations in success rate and accessibility.

Purpose of the Study:

• To provide a detailed protocol for the OPEN (oligomerized pool engineering) method.
• To enable researchers to efficiently engineer zinc-finger arrays for ZFN applications.
• To offer a higher success rate method compared to existing ZFN engineering techniques.

Main Methods:

• Utilized an 'open-source,' combinatorial selection-based approach called OPEN.
• Performed selections in Escherichia coli using a bacterial two-hybrid system.
• Developed a detailed protocol requiring no specialized equipment.

Main Results:

• The OPEN method demonstrates a higher success rate in engineering functional ZFNs compared to modular-assembly methods.
• OPEN selections are efficient and do not require specialized laboratory equipment.
• Researchers can generate multiple, customized ZFNs using the OPEN protocol.

Conclusions:

• The OPEN method is a broadly applicable, efficient, and accessible approach for engineering ZFNs.
• This protocol facilitates the rapid generation of customized ZFNs for eukaryotic genome editing.
• OPEN represents a significant advancement in ZFN engineering, offering improved success rates and ease of use.