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Identification of Small Molecule-binding Proteins in a Native Cellular Environment by Live-cell Photoaffinity Labeling
Published on: September 20, 2016
Signaling and subcellular targeting by membrane-binding domains
1Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892-0580, USA. jh8e@nih.gov
Annual Review of Biophysics and Biomolecular Structure
|August 15, 2000
Summary
Protein kinase C homology domains (CH domains) and other lipid-binding domains are crucial for eukaryotic cell signaling and membrane trafficking. They control protein localization and function through interactions with cell membranes.
Area of Science:
- Molecular biology
- Cell biology
- Biochemistry
Background:
- Protein kinase C homology-1 and -2 (CH), FYVE, and pleckstrin homology domains are common in eukaryotic proteins.
- These domains are vital for signal transduction and membrane trafficking pathways.
- They mediate protein interactions with cell membranes.
Purpose of the Study:
- To investigate the molecular mechanisms of membrane binding by CH, FYVE, and pleckstrin homology domains.
- To understand how these domains regulate protein localization within eukaryotic cells.
Main Methods:
- Structural and biochemical analyses of these domains.
- In vivo studies using green fluorescent protein (GFP) fusions.
Main Results:
- The molecular mechanisms of membrane binding involve specific and nonspecific interactions with membrane lipids.
- These domains play key roles in localizing proteins to plasma and internal cellular membranes.
- Green fluorescent protein fusions confirmed the in vivo importance of these domains.
Conclusions:
- CH, FYVE, and pleckstrin homology domains utilize a combination of lipid interactions for membrane binding.
- These domains are essential regulators of protein localization, impacting cellular signaling and trafficking.
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