Abstract
Caveolae are -50-100 nm membrane micro-invaginations associated with the plasma membrane of a wide variety of cells. Although they were first identified in transmission electron micrographs -40 years ago, their exact function(s) has remained controversial. Two well-established functions include: (1) the transcytosis of both large and small molecules across capillary endothelial cells and (2) the utilization of GPI-linked proteins to concentrate small molecules in caveolae for translocation to the cytoplasm (termed potocytosis). Recently, interest in a 'third' proposed caveolar function, namely transmembrane signalling, has been revived by the identification of caveolin - a transformation-dependent v-Src substrate and caveolar marker protein - and the isolation of caveolin-rich membrane domains from cultured cells. Here we will discuss existing evidence that suggests a role for caveolae in signalling events.
Original language | English (US) |
---|---|
Pages (from-to) | 121-124 |
Number of pages | 4 |
Journal | Molecular Membrane Biology |
Volume | 12 |
Issue number | 1 |
DOIs | |
State | Published - 1995 |
Keywords
- Caveolae
- Caveolin
- G-protein signalling
- Plasmalemmal vesicles
- Src-like kinases
ASJC Scopus subject areas
- Molecular Biology
- Cell Biology