| RRC ID |
65691
|
| 著者 |
Arumugam S, Schmieder S, Pezeshkian W, Becken U, Wunder C, Chinnapen D, Ipsen JH, Kenworthy AK, Lencer W, Mayor S, Johannes L.
|
| タイトル |
Ceramide structure dictates glycosphingolipid nanodomain assembly and function.
|
| ジャーナル |
Nat Commun
|
| Abstract |
Gangliosides in the outer leaflet of the plasma membrane of eukaryotic cells are essential for many cellular functions and pathogenic interactions. How gangliosides are dynamically organized and how they respond to ligand binding is poorly understood. Using fluorescence anisotropy imaging of synthetic, fluorescently labeled GM1 gangliosides incorporated into the plasma membrane of living cells, we found that GM1 with a fully saturated C16:0 acyl chain, but not with unsaturated C16:1 acyl chain, is actively clustered into nanodomains, which depends on membrane cholesterol, phosphatidylserine and actin. The binding of cholera toxin B-subunit (CTxB) leads to enlarged membrane domains for both C16:0 and C16:1, owing to binding of multiple GM1 under a toxin, and clustering of CTxB. The structure of the ceramide acyl chain still affects these domains, as co-clustering with the glycosylphosphatidylinositol (GPI)-anchored protein CD59 occurs only when GM1 contains the fully saturated C16:0 acyl chain, and not C16:1. Thus, different ceramide species of GM1 gangliosides dictate their assembly into nanodomains and affect nanodomain structure and function, which likely underlies many endogenous cellular processes.
|
| 巻・号 |
12(1)
|
| ページ |
3675
|
| 公開日 |
2021-6-16
|
| DOI |
10.1038/s41467-021-23961-9
|
| PII |
10.1038/s41467-021-23961-9
|
| PMID |
34135326
|
| PMC |
PMC8209009
|
| MeSH |
Actins / chemistry
CD59 Antigens / chemistry
Cell Membrane / chemistry*
Cell Membrane / drug effects
Ceramides / chemistry*
Cholera Toxin / chemistry
Cholera Toxin / pharmacology
Cholesterol / chemistry
G(M1) Ganglioside / chemistry
Glycosphingolipids / chemistry
Glycosylphosphatidylinositols / chemistry
Models, Biological
Molecular Dynamics Simulation
Phosphatidylserines / chemistry
|
| IF |
12.121
|
| リソース情報 |
| ヒト・動物細胞 |
GM95(RCB1026) |
