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Caveolin-1 and -2 in the exocytic pathway of MDCK cells

Scheiffele, P. and Verkade, P. and Fra, A. M. and Virta, H. and Simons, K. and Ikonen, E.. (1998) Caveolin-1 and -2 in the exocytic pathway of MDCK cells. The Journal of cell biology, Vol. 140, H. 4. pp. 795-806.

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Official URL: http://edoc.unibas.ch/dok/A5259868

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Abstract

We have studied the biosynthesis and transport of the endogenous caveolins in MDCK cells. We show that in addition to homooligomers of caveolin-1, heterooligomeric complexes of caveolin-1 and -2 are formed in the ER. The oligomers become larger, increasingly detergent insoluble, and phosphorylated on caveolin-2 during transport to the cell surface. In the TGN caveolin-1/-2 heterooligomers are sorted into basolateral vesicles, whereas larger caveolin-1 homooligomers are targeted to the apical side. Caveolin-1 is present on both the apical and basolateral plasma membrane, whereas caveolin-2 is enriched on the basolateral surface where caveolae are present. This suggests that caveolin-1 and -2 heterooligomers are involved in caveolar biogenesis in the basolateral plasma membrane. Anti-caveolin-1 antibodies inhibit the apical delivery of influenza virus hemagglutinin without affecting basolateral transport of vesicular stomatitis virus G protein. Thus, we suggest that caveolin-1 homooligomers play a role in apical transport.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Neurobiology > Cell Biology (Scheiffele)
UniBasel Contributors:Scheiffele, Peter
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Rockefeller University Press
ISSN:0021-9525
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:08 Jun 2012 06:44
Deposited On:22 Mar 2012 13:23

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