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Lipid osmosis, membrane tension, and other mechanochemical driving forces of lipid flow
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Abstract
Nonvesicular lipid transport among different membranes or membrane domains plays crucial roles in lipid homeostasis and organelle biogenesis. However, the forces that drive such lipid transport are not well understood. We propose that lipids tend to flow towards the membrane area with a higher membrane protein density in a process termed lipid osmosis. This process lowers the membrane tension in the area, resulting in a membrane tension difference called osmotic membrane tension. We examine the thermodynamic basis and experimental evidence of lipid osmosis and osmotic membrane tension. We predict that lipid osmosis can drive bulk lipid flows between different membrane regions through lipid transfer proteins, scramblases, or similar barriers that selectively pass lipids but not membrane proteins. We also speculate on the biological functions of lipid osmosis. Finally, we explore other driving forces for lipid transfer and describe potential methods and systems to further test our theory.
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Highly accurate protein structure prediction with AlphaFold
Jumper, J., Evans, R., Pritzel, A., Green, T., Figurnov, M., Ronneberger, O., Tunyasuvunakool, K., Bates, R., Žídek, A., Potapenko, A., et al. (2021) · Nature · doi:10.1038/s41586-021-03819-2 · Cited by 43,764
Shi, Z., Graber, Z. T., Baumgart, T., Stone, H. A., & Cohen, A. E. (2018) · Cell · doi:10.1016/j.cell.2018.09.054 · Cited by 355
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Metadata
- Authors
- Zhang, Y., & Lin, C.
- Affiliations
- Yale University (US)
- Corresponding author
- Zhang, Yongli
- Lin, Chenxiang
- Venue
- Current Opinion in Cell Biology
- Publisher
- Elsevier BV
- Published
- 2024-06
- Volume
- 88
- Pages
- 102377
- ISSN
- 0955-0674 (ISSN-L)
- PMC
- PMC11193448
- OpenAlex
- W4399239987
- Cited by
- 14
- References
- 2
- Citations by year
- 2026: 7 · 2025: 6 · 2024: 1
- FWCI
- 0.57
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Licence
- www.elsevier.com/tdm/userlicense/1.0/ (tdm)
- www.elsevier.com/legal/tdmrep-license (tdm)
- www.elsevier.com/open-access/userlicense/1.0/ (am, 364 d)
- doi.org/10.15223/policy-017 (stm-asf)
- doi.org/10.15223/policy-037 (stm-asf)
- doi.org/10.15223/policy-012 (stm-asf)
- doi.org/10.15223/policy-029 (stm-asf)
- doi.org/10.15223/policy-004 (stm-asf)
- Locations
- Current Opinion in Cell Biology (acceptedVersion)
- bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- PubMed Central (submittedVersion, cc-by-nc-nd)
- Funders
- National Institutes of Health
- NIGMS (R35 GM131714, R35GM149264)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Lipid Membrane Structure and Behavior
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
- Keywords
- membrane tension, lipid flow, lipid transfer proteins, scramblase, lipid homeostasis, organelle biogenesis, membrane domains
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