Ligand-modulated conformational switching in a fully synthetic membrane-bound receptorCitation formats
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Ligand-modulated conformational switching in a fully synthetic membrane-bound receptor. / Lister, Francis; Le Bailly, Bryden; Webb, Simon; Clayden, Jonathan.
In: Nature Chemistry, Vol. 9, 2017, p. 420-425.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Ligand-modulated conformational switching in a fully synthetic membrane-bound receptor
AU - Lister, Francis
AU - Le Bailly, Bryden
AU - Webb, Simon
AU - Clayden, Jonathan
PY - 2017
Y1 - 2017
N2 - Signal transduction through G protein-coupled receptors (GPCRs) involves binding to signalling molecules at the cell surface, which leads to global changes in molecular conformation that are communicated through the membrane. Artificial mechanisms for communication involving ligand binding and global conformational switching have been demonstrated so far only in the solution phase. Here we report a membrane-bound synthetic receptor that responds to binding of a ligand by undergoing a conformational change that is propagated over several nanometres, deep into the phospholipid bilayer. Our design uses a helical foldamer core, with structural features borrowed from a class of membrane-active fungal antibiotics, ligated to a water-compatible, metal-centred binding site and a conformationally-responsive fluorophore. Using the fluorophore as a remote reporter of conformational change, we find that binding of specific carboxylate ligands to a Cu(II) cofactor at the binding site perturbs the foldamer's global conformation, mimicking the conformational response of a GPCR to ligand binding.
AB - Signal transduction through G protein-coupled receptors (GPCRs) involves binding to signalling molecules at the cell surface, which leads to global changes in molecular conformation that are communicated through the membrane. Artificial mechanisms for communication involving ligand binding and global conformational switching have been demonstrated so far only in the solution phase. Here we report a membrane-bound synthetic receptor that responds to binding of a ligand by undergoing a conformational change that is propagated over several nanometres, deep into the phospholipid bilayer. Our design uses a helical foldamer core, with structural features borrowed from a class of membrane-active fungal antibiotics, ligated to a water-compatible, metal-centred binding site and a conformationally-responsive fluorophore. Using the fluorophore as a remote reporter of conformational change, we find that binding of specific carboxylate ligands to a Cu(II) cofactor at the binding site perturbs the foldamer's global conformation, mimicking the conformational response of a GPCR to ligand binding.
U2 - 10.1038/nchem.2736
DO - 10.1038/nchem.2736
M3 - Article
VL - 9
SP - 420
EP - 425
JO - Nature Chemistry
JF - Nature Chemistry
SN - 1755-4330
ER -