Nicotinic receptor M3 transmembrane domain: position 8' contributes to channel gating.


The nicotinic acetylcholine receptor (nAChR) is a pentamer of homologous subunits with composition alpha(2)(beta)(epsilon)(delta) in adult muscle. Each subunit contains four transmembrane domains (M1-M4). Position 8' of the M3 domain is phenylalanine in all heteromeric alpha subunits, whereas it is a hydrophobic nonaromatic residue in non-alpha subunits… (More)


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