Abstract
Subtypes of nicotinic receptors previously reported to be unaffected by neuronal bungarotoxin (NBT), including α3β4-containing and muscle type (α1β1γδ) receptors, are shown to be inhibited by this toxin, but with rapid kinetics of onset and recovery. This inhibition is in contrast to the slow and prolonged inhibition of α3β2-containing receptors, suggesting that the beta subunits determine the kinetics of NBT inhibition of α3 receptors. We have coexpressed chimeric beta subunits with α3, and our results show that the first 121 amino acids of the beta subunit extracellular domain are sufficient to regulate the kinetics of NBT inhibition. This domain is also an important determinant of whether cytisine will act as a full agonist or a partial agonist of nictonic receptors formed with α3.
Original language | English (US) |
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Pages (from-to) | 141-148 |
Number of pages | 8 |
Journal | Proceedings of the Royal Society B: Biological Sciences |
Volume | 252 |
Issue number | 1334 |
DOIs | |
State | Published - 1993 |
Externally published | Yes |
ASJC Scopus subject areas
- General Biochemistry, Genetics and Molecular Biology
- General Immunology and Microbiology
- General Environmental Science
- General Agricultural and Biological Sciences