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Decreases in rates of lipid exchange between Mycoplasma gallisepticum cells and unilamellar vesicles by incorporation of sphingomyelin
Open accessAbstract
The kinetics of exchange of radiolabeled cholesterol and phospholipids between Mycoplasma gallisepticum cells and an excess of small unilamellar phospholipid/cholesterol vesicles were studied using cells enriched with different phospholipid classes but the same fatty acyl content. The rates of the rapidly exchanging cholesterol and phospholipid pools were markedly slower in sphingomyelin-containing cells than in phosphatidylcholine-containing cells. The decreased rates of spontaneous cholesterol and protein-mediated phospholipid exchange from the outer leaflet of the mycoplasma membrane are attributed to stronger interactions between sphingomyelin and cholesterol than between phosphatidylcholine and cholesterol. On the other hand, an increase in cholesterol exchange rate was found on incorporation of a cyclopentano-1,3-diacyl-2-phosphatidylglycerol, which interacts less with cholesterol than does the analogous glycero-1,2-diacyl-sn-3-phosphatidylglycerol.
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Cholesterol is highly correlated with high sphingomyelin concentration and lower PC concentration.
“In addition, cholesterol is highly correlated with high sphingomyelin concentration and lower PC concentration, since sphingolipids attract cholestserol while PC repels it (Clejan and Bittman, 1984; Lönnfors et al., 2011; Gaspari et al., 2020; Kornspan and Rottem, 2012).”
From Fundamental behaviors emerge from simulations of a living minimal cell (2022) · cites this paper as Clejan and Bittman, 1984
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References 19 · Cited by 49
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Metadata
- Authors
- Clejan, S., & Bittman, R.
- Affiliations
- Queens College, CUNY (US)
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 1984-09
- Volume
- 259
- Issue
- 17
- Pages
- 10823-10826
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W1590789672
- Cited by
- 49
- References
- 19
- Citations by year
- 2022: 1 · 2016: 1 · 2015: 2 · 2014: 1 · 2012: 1
- FWCI
- 1.48
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Journal of Biological Chemistry (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Lipid Membrane Structure and Behavior
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Cholesterol and Lipid Metabolism
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
- Keywords
- Mycoplasma gallisepticum, lipid exchange, sphingomyelin, cholesterol, phosphatidylcholine, unilamellar vesicles, membrane fluidity, protein-lipid interactions, phosphatidylglycerol
- MeSH terms
- Cell Membrane, Cholesterol, Kinetics, Lipid Bilayers, Membrane Lipids, Mycoplasma, Phosphatidylcholines, Phospholipids, Sphingomyelins
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