Pathways and control of connexin oligomerization.
Connexins form gap junction channels that link neighboring cells into an intercellular communication network. Many cells that express multiple connexins produce heteromeric channels containing at least two connexins, which provides a means to fine tune gap junctional communication. Formation of channels by multiple connexins is controlled at two levels: by inherent structural compatibilities that enable connexins to hetero-oligomerize and by cellular mechanisms that restrict the formation of heteromers by otherwise compatible connexins. Here, I discuss roles for secretory compartments beyond the endoplasmic reticulum in connexin oligomerization and evidence that suggests that membrane microdomains help regulate connexin trafficking and assembly.
Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, Emory University School of Medicine, Atlanta, GA 30322, USA. mhkoval@emory.edu
Michael
M
Koval
D000818:Animals; D002450:Cell Communication; D017630:Connexins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D004721:Endoplasmic Reticulum; D017629:Gap Junctions / Q000737:chemistry* / Q000378:metabolism*; D008239:Lysine / Q000378:metabolism; D021962:Membrane Microdomains / Q000378:metabolism / Q000502:physiology*; D008958:Models, Molecular; D008962:Models, Theoretical; D015336:Molecular Probe Techniques; D015398:Signal Transduction
D017630:Connexins; D008239:Lysine