Roles of hydrophilic residues in GABA binding site of GABA-ρ1 receptor explain the addition/inhibition effects of competitive ligands
Neurochemistry International(2022)
Abstract
The orthosteric binding site of GABA-gated ion channels has been widely explored. Many residues in the binding site of GABA were studied. The interactions due to the binding of GABA into the binding site drive channel activation and determine the potency and efficacy of GABA response. The combined effect of a competitive ligand and GABA on GABA-ρ1 receptors has been poorly studied. Here, we used point mutations, molecular modeling, and electrophysiological studies to explore the role of two hydrophilic residues (Serine 168 and Serine 243) of the GABA-ρ1 receptors in response to the binding of GABA and other studied ligands.
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Key words
GABA,TACA,TPMPA,THIP,I-4-AA,3-APPA
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