Molecular Cloning of the Antagonist-Binding Subunit of the Glycine Receptor

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Abstract
The postsynaptic receptor for the inhibitory neurotransmitter glycine is a heterooligomeric membrane protein which, after affinity purification on an antagonist column, contains three polypeptides of 48K, 58K and 93K. Sequencing of cDNA clones of the antagonist-binding 48K subunit revealed a structural organization similar to and significant amino acid homology with nicotinic acetylcholine receptor proteins. Our data suggest the existence of a set of related genes encoding transmembrane channel-forming neurotransmitter receptor polypeptides of excitable membranes.