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Ligand Binding-Induced Structural Changes in the M2 Muscarinic Acetylcholine Receptor Revealed by Vibrational Spectroscopy
journal contribution
posted on 2019-11-11, 19:37 authored by Kota Katayama, Kohei Suzuki, Ryoji Suno, Hirokazu Tsujimoto, So Iwata, Takuya Kobayashi, Hideki KandoriM2 muscarinic acetylcholine receptor (M2R)
is a prototypical G protein-coupled receptor (GPCR) that responds
to acetylcholine and mediates various cellular responses in the nervous
system. Here, we used attenuated total reflection-Fourier transform
infrared spectroscopy analyses on M2R reconstituted in
a lipid membrane to understand the molecular mechanism behind the
ligand binding-induced conformational changes. Upon agonist binding,
M2R shows large spectral change of the amide-I band corresponding
to backbone CO stretch,
which likely connects with the receptor activation in the lipid environment.
These results pave the way to probe effects of different ligand binding
on GPCRs using vibrational spectroscopy.
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vibrational spectroscopyM 2 R reconstitutedlipid environmentlipid membraneprobe effectsspectroscopy analysesamide-I bandGPCRreceptor activationG protein-coupled receptorLigand Binding-Induced Structural ChangesVibrational Spectroscopy M 2 muscarinic acetylcholine receptorligand bindingM 2 Rligand binding-inducedM 2 Muscarinic Acetylcholine Receptor Revealedagonist binding
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