Prominin-1: a distinct cholesterol-binding membrane protein and the organisation of the apical plasma membrane of epithelial cells.
The apical plasma membrane of polarized epithelial cells is composed of distinct subdomains, that is, planar regions and protrusions (microvilli, primary cilium), each of which are constructed from specific membrane microdomains. Assemblies containing the pentaspan glycoprotein prominin-1 and certain membrane lipids, notably cholesterol, are characteristic features of these microdomains in apical membrane protrusions. Here we highlight the recent findings concerning the molecular architecture of the apical plasma membrane of epithelial cells and its dynamics. The latter is illustrated by the budding and fission of prominin-1-containing membrane vesicles from apical plasma membrane protrusions, which is controlled, at least in part, by the level of membrane cholesterol and the cholesterol-dependent organization of membrane microdomains.
Corbeil
Denis
D
Tissue Engineering Laboratories, BIOTEC, Technische Universität Dresden, Tatzberg 47-49, 01307, Dresden, Germany. denis.corbeil@biotec.tu-dresden.de
Marzesco
Anne-Marie
AM
Fargeas
Christine A
CA
Huttner
Wieland B
WB
D000071916:AC133 Antigen; D000818:Animals; D015703:Antigens, CD / Q000235:genetics / Q000502:physiology*; D002462:Cell Membrane / Q000378:metabolism; D002784:Cholesterol / Q000378:metabolism*; D022162:Cytoplasmic Vesicles / Q000502:physiology; D004847:Epithelial Cells / Q000378:metabolism*; D005677:G(M1) Ganglioside / Q000378:metabolism; D005679:G(M3) Ganglioside / Q000378:metabolism; D006023:Glycoproteins / Q000235:genetics / Q000502:physiology*; D006801:Humans; D021962:Membrane Microdomains / Q000378:metabolism*; D008565:Membrane Proteins / Q000378:metabolism; D010455:Peptides / Q000235:genetics / Q000502:physiology*; D017948:Retinal Rod Photoreceptor Cells / Q000502:physiology
D000071916:AC133 Antigen; D015703:Antigens, CD; D005679:G(M3) Ganglioside; D006023:Glycoproteins; D008565:Membrane Proteins; C000606023:PROM1 protein, human; D010455:Peptides; D005677:G(M1) Ganglioside; D002784:Cholesterol