Bastiani, MicheleHill, Michelle M.Nixon, Susan J.Lo, Harriet P.Abankwa, DanielLuetterforst, RobertFernandez-Rojo, ManuelBreen, Michael R.Vinten, JorgenWalser, Piers J.North, Kathryn N.Hancock, John F.Pilch, Paul F.Parton, Robert G.Liu, LibinJedrychowski, MarkGygi, Steven2013-01-292009Bastiani, Michele, Libin Liu, Michelle M. Hill, Mark P. Jedrychowski, Susan J. Nixon, Harriet P. Lo, Daniel Abankwa, et al. 2009. MURC/Cavin-4 and cavin family members form tissue-specific caveolar complexes. Journal of Cell Biology 185(7): 1259-1273.0021-9525http://nrs.harvard.edu/urn-3:HUL.InstRepos:10236184Polymerase 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.en-USJournal Article2013-01-2910.1083/jcb.200903053