Membrane topology and quaternary structure of the cardiac gap junction ion channel
نویسندگان
چکیده
منابع مشابه
Three-dimensional structure of a recombinant gap junction membrane channel.
Gap junction membrane channels mediate electrical and metabolic coupling between adjacent cells. The structure of a recombinant cardiac gap junction channel was determined by electron crystallography at resolutions of 7.5 angstroms in the membrane plane and 21 angstroms in the vertical direction. The dodecameric channel was formed by the end-to-end docking of two hexamers, each of which display...
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In the heart, intercellular gap junction channels constructed from connexin molecules are crucial for conduction of the electric impulse. Cardiomyocytes can be interconnected by channels composed of three types of connexin proteins: Cx40, Cx43 or Cx45. In mammalian hearts, these three isoforms are regionally differently expressed and even between the species differences exist. Each of these cha...
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The connexins form a family of membrane spanning proteins that assemble into gap junction channels. The biophysical properties of these channels are dependent upon the constituent connexin isoform. To begin identifying the molecular basis for gap junction channel behavior in the human heart, a tissue that expresses connexin43, we used site-directed mutagenesis to generate mutant cDNAs of human ...
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Communication plays an important role in the rapid Connexin Structure progress of modern society. We live in an age when Gap junctions exhibit a hierarchy of assembly. The prininformation is transmitted through many different pathcipal structural component, the membrane protein conways and in many different forms to influence our daily nexin, is organized into the basic unit of structure, the d...
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ژورنال
عنوان ژورنال: Journal of the American College of Cardiology
سال: 1990
ISSN: 0735-1097
DOI: 10.1016/0735-1097(90)91737-f