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Lipid Binding of SH2 Domains
Wonhwa Cho1, Kyli Berkley2, Ashutosh Sharma2
1Department of Chemistry, University of Illinois at Chicago, Chicago, IL, USA. wcho@uic.edu.
Methods in Molecular Biology (Clifton, N.J.)
|September 5, 2023
Summary
Src homology 2 (SH2) domains bind tightly to membrane lipids, influencing cell signaling. New assays quantify this interaction, aiding inhibitor discovery for SH2 domain-lipid interactions.
Area of Science:
- Molecular Biology
- Cell Signaling
- Biochemistry
Background:
- Src homology 2 (SH2) domains recognize phosphotyrosine motifs.
- Many human SH2 domains exhibit specific binding to membrane lipids.
- Lipid binding sites are distinct from phosphotyrosine-binding pockets in most SH2 domains.
Purpose of the Study:
- To describe quantitative assays for SH2 domain-lipid interactions.
- To enable high-throughput screening for inhibitors of SH2 domain-lipid binding.
Main Methods:
- Surface plasmon resonance (SPR) analysis.
- Fluorescence quenching analysis.
Main Results:
- Developed assays quantify SH2 domain-lipid binding affinity and specificity.
- Assays facilitate high-throughput screening for SH2 domain-lipid-binding inhibitors.
Conclusions:
- SH2 domain-lipid interactions are crucial for spatiotemporal control of signaling proteins.
- Quantitative assays provide tools for studying these interactions and developing inhibitors.
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