MURC/Cavin-4 and cavin family members form tissue-specific caveolar complexes
AuthorBastiani, M; Liu, L; Hill, MM; Jedrychowski, MP; Nixon, SJ; Lo, HP; Abankwa, D; Luetterforst, R; Fernandez-Rojo, M; Breen, MR; ...
Source TitleThe Journal of Cell Biology
PublisherROCKEFELLER UNIV PRESS
University of Melbourne Author/sNorth, Kathryn
Document TypeJournal Article
CitationsBastiani, M., Liu, L., Hill, M. M., Jedrychowski, M. P., Nixon, S. J., Lo, H. P., Abankwa, D., Luetterforst, R., Fernandez-Rojo, M., Breen, M. R., Gygi, S. P., Vinten, J., Walser, P. J., North, K. N., Hancock, J. F., Pilch, P. F. & Parton, R. G. (2009). MURC/Cavin-4 and cavin family members form tissue-specific caveolar complexes. JOURNAL OF CELL BIOLOGY, 185 (7), pp.1259-1273. https://doi.org/10.1083/jcb.200903053.
Access StatusOpen Access
Polymerase I and transcript release factor (PTRF)/Cavin is a cytoplasmic protein whose expression is obligatory for caveola formation. Using biochemistry and fluorescence resonance energy transfer-based approaches, we now show that a family of related proteins, PTRF/Cavin-1, serum deprivation response (SDR)/Cavin-2, SDR-related gene product that binds to C kinase (SRBC)/Cavin-3, and muscle-restricted coiled-coil protein (MURC)/Cavin-4, forms a multiprotein complex that associates with caveolae. This complex can constitutively assemble in the cytosol and associate with caveolin at plasma membrane caveolae. Cavin-1, but not other cavins, can induce caveola formation in a heterologous system and is required for the recruitment of the cavin complex to caveolae. The tissue-restricted expression of cavins suggests that caveolae may perform tissue-specific functions regulated by the composition of the cavin complex. Cavin-4 is expressed predominantly in muscle, and its distribution is perturbed in human muscle disease associated with Caveolin-3 dysfunction, identifying Cavin-4 as a novel muscle disease candidate caveolar protein.
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