Related Experiment Video
Updated: May 13, 2026
09:01
Mutagenesis and Functional Selection Protocols for Directed Evolution of Proteins in E. coli
Published on: March 16, 2011
30.7K
Systematic comparison and base-editing-mediated directed protein evolution and functional screening yield superior
De Xing1, Tao Bai1, Ozlem Neyisci1
1Robert Lurie Comprehensive Cancer Center, Department of Obstetrics and Gynecology, Feinberg School of Medicine at Northwestern University, Chicago, IL, USA.
Nature Communications
|July 18, 2025
Summary
We developed AID 2.1, an improved auxin-inducible degron (AID) system, for rapid protein manipulation. This advanced system enables efficient gene characterization, even for essential genes, by minimizing basal degradation and enhancing target recovery.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- Studying dynamic biological processes requires rapid genetic manipulation tools.
- Traditional methods are too slow and can be lethal for essential genes.
- Inducible protein degradation systems offer a solution for precise gene manipulation.
Purpose of the Study:
- To compare the efficiency of five inducible protein degradation systems.
- To develop an improved auxin-inducible degron (AID) system for enhanced gene characterization.
- To enable the study of essential genes through rapid and controlled protein depletion.
Main Methods:
- Comparative analysis of five inducible protein degradation systems: dTAG, HaloPROTAC, IKZF3, and two auxin-inducible degrons (OsTIR1 and AtFB2).
- Evaluation of degradation efficiency, basal degradation, target recovery, and ligand impact.
- Directed protein evolution using base-editing and functional screening to generate improved OsTIR1 variants.
- Development and validation of the new AID 2.1 system.
Main Results:
- OsTIR1-based AID 2.0 showed robust degradation but had issues with basal degradation and slow recovery.
- Directed evolution yielded gain-of-function OsTIR1 variants, including S210A.
- The novel AID 2.1 system demonstrated efficient target depletion with minimal basal degradation and faster recovery.
- AID 2.1 facilitates characterization and rescue experiments for essential genes.
Conclusions:
- AID 2.1 represents a significant advancement in inducible protein degradation technology.
- The improved system enables precise study of gene function in dynamic biological systems.
- This work provides a valuable reference dataset and enhanced tools for molecular biologists.
Related Concept Videos
01:59Plant Breeding and Biotechnology
Crop cultivation has a long history in human civilization, with records showing the cultivation of cereal plants beginning at around 8000 BC. This early plant breeding was developed primarily to provide a steady supply of food.
01:22Bioreactor Controls-III
Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...