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Emerging roles of lipid transfer protein dimerization
Shalom Borst Pauwels1, Jacques Neefjes1, Birol Cabukusta1
1Cell and Chemical Biology, ONCODE Institute, Leiden University Medical Center, 2333ZA Leiden, Netherlands.
Journal of Cell Science
|August 8, 2025
Summary
Lipid transfer proteins (LTPs) maintain organelle identity by trafficking lipids. Their dimerization is crucial for proper lipid flow and organelle function, with implications for cellular health and disease.
Area of Science:
- Cell Biology
- Biochemistry
- Molecular Biology
Background:
- Organelle identity and function are dictated by unique lipid compositions.
- Lipid transfer proteins (LTPs) mediate non-vesicular lipid trafficking between cellular membranes.
- LTPs are essential for creating sub-organellar nano-domains and regulating membrane biophysical properties.
Purpose of the Study:
- To review recent advancements in understanding lipid transfer protein dimerization.
- To highlight the functional and clinical significance of LTP dimerization and its associated adaptor proteins.
- To discuss the role of LTP dimerization in regulating inter-organelle lipid trafficking.
Main Methods:
- Literature review of recent research on lipid transfer proteins and their dimerization.
- Analysis of studies focusing on the functional implications of LTP homo- and hetero-dimerization.
- Examination of the clinical relevance of disrupted LTP dimerization and lipid flow.
Main Results:
- LTP dimerization promotes localization at membrane contact sites.
- Dimerization facilitates the formation of LTP super-complexes for synchronized lipid transfer.
- Aberrant LTP dimerization leads to disturbed organelle lipid landscapes with clinical consequences.
Conclusions:
- LTP dimerization is a critical mechanism for regulating lipid trafficking between organelles.
- Understanding LTP dimerization offers insights into maintaining cellular lipid homeostasis.
- Disruptions in LTP dimerization have significant clinical implications, underscoring their therapeutic potential.
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