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Updated: Jan 5, 2026

A Protocol for the Production of KLRG1 Tetramer
Published on: January 12, 2010
How CrRLK1L Receptor Complexes Perceive RALF Signals.
Zengxiang Ge1, Thomas Dresselhaus2, Li-Jia Qu1
1State Key Laboratory for Protein and Plant Gene Research, Peking-Tsinghua Center for Life Sciences, College of Life Sciences, Peking University, Beijing 100871, China.
Plant peptide hormone RALF23 perception involves the FER receptor complex, nucleated by co-receptor LLG binding. This mechanism explains how RALFs interact with CrRLK1L receptors and co-receptors in various plant tissues.
Area of Science:
- Plant molecular biology
- Plant hormone signaling
- Receptor-ligand interactions
Background:
- RALFs are secreted peptides crucial for plant growth and development.
- CrRLK1L receptors, along with LRE/LLG co-receptors, mediate RALF perception.
- The precise mechanism of RALF perception remained unclear.
Purpose of the Study:
- To elucidate the mechanistic basis of RALF perception by CrRLK1L-LRE/LLG receptor complexes.
- To understand the role of co-receptors in mediating ligand-receptor interactions.
Main Methods:
- Investigated the interaction between RALF23 and co-receptor LLG.
- Characterized the formation of the FER receptor complex.
- Utilized biochemical and structural biology approaches (implied).
Main Results:
- Demonstrated that co-receptor LLG directly binds to the peptide hormone RALF23.
- Showed that this LLG-RALF23 interaction nucleates the formation of the FER receptor complex.
- Provided a mechanistic model for RALF perception.
Conclusions:
- The binding of LLG to RALF23 is a key step in initiating the FER receptor complex.
- This elucidated mechanism is likely conserved across different tissues and RALF-receptor pairs.
- Offers insights into plant growth regulation and potential targets for crop improvement.
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