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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Physiol+Cell+Physiol
2017 ; 312
(4
): C459-C477
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Caveolins and cavins in the trafficking, maturation, and degradation of caveolae:
implications for cell physiology
#MMPMID28122734
Busija AR
; Patel HH
; Insel PA
Am J Physiol Cell Physiol
2017[Apr]; 312
(4
): C459-C477
PMID28122734
show ga
Caveolins (Cavs) are ~20 kDa scaffolding proteins that assemble as oligomeric
complexes in lipid raft domains to form caveolae, flask-shaped plasma membrane
(PM) invaginations. Caveolae ("little caves") require lipid-lipid, protein-lipid,
and protein-protein interactions that can modulate the localization,
conformational stability, ligand affinity, effector specificity, and other
functions of proteins that are partners of Cavs. Cavs are assembled into small
oligomers in the endoplasmic reticulum (ER), transported to the Golgi for
assembly with cholesterol and other oligomers, and then exported to the PM as an
intact coat complex. At the PM, cavins, ~50 kDa adapter proteins, oligomerize
into an outer coat complex that remodels the membrane into caveolae. The
structure of caveolae protects their contents (i.e., lipids and proteins) from
degradation. Cellular changes, including signal transduction effects, can
destabilize caveolae and produce cavin dissociation, restructuring of Cav
oligomers, ubiquitination, internalization, and degradation. In this review, we
provide a perspective of the life cycle (biogenesis, degradation), composition,
and physiologic roles of Cavs and caveolae and identify unanswered questions
regarding the roles of Cavs and cavins in caveolae and in regulating cell
physiology.(1).