title: Assembly and Turnover of Caveolae: What Do We Really Know?
abstract: In addition to containing highly dynamic nanoscale domains, the plasma membranes of many cell types are decorated with caveolae, flask-shaped domains enriched in the structural protein caveolin-1 (Cav1). The importance of caveolae in numerous cellular functions and processes has become well-recognized, and recent years have seen dramatic advances in our understanding of how caveolae assemble and the mechanisms control the turnover of Cav1. At the same time, work from our lab and others have revealed that commonly utilized strategies such as overexpression and tagging of Cav1 have unexpectedly complex consequences on the trafficking and fate of Cav1. Here, we discuss the implications of these findings for current models of caveolae biogenesis and Cav1 turnover. In addition, we discuss how disease-associated mutants of Cav1 impact caveolae assembly and outline open questions in this still-emerging area.
authors.affiliation: Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine Nashville, TN, USA.
authors.forename: Bing
authors.initials: B
authors.lastname: Han
authors.affiliation: Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine Nashville, TN, USA.
authors.forename: Courtney A
authors.initials: CA
authors.lastname: Copeland
authors.affiliation: Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine Nashville, TN, USA.
authors.forename: Ajit
authors.initials: A
authors.lastname: Tiwari
authors.affiliation: Department of Molecular Physiology and Biophysics, Vanderbilt University School of MedicineNashville, TN, USA; Department of Cell and Developmental Biology, Vanderbilt University School of MedicineNashville, TN, USA; Epithelial Biology Program, Vanderbilt University School of MedicineNashville, TN, USA; Chemical and Physical Biology Program, Vanderbilt UniversityNashville, TN, USA.
authors.forename: Anne K
authors.initials: AK
authors.lastname: Kenworthy
keywords: GFP; breast cancer; caveolae; caveolin-1; congenital generalized lipodystrophy; degradation; pulmonary arterial hypertension; trafficking