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- W2413454296 abstract "We have used spectrofluorometric and flow cytometric techniques to examine the interactions of formyl peptide ligands (L) with their cell surface receptors (R). Kinetic studies suggest that L binds to R at a diffusion limited rate and that R undergoes rapid transitions involving three states (LR, LRG, the ternary complex of L and R with the G protein, and a desensitized receptor LRX which forms within seconds) prior to internalization. A spectroscopic analysis of the interaction between L and R show that the binding pocket of R is large enough to contain no more than 6 amino acids and that a fluorescein-labelled pentapeptide is quenched upon binding to R. We hypothesize that histidine 90 (putatively located in the extracellular loop connecting the second and third transmembrane domains) protonates L and quenches the probe. New technology will extend the analysis of structure and dynamics to low affinity peptide receptors of living biological systems. Such technology will have implications in the design of peptidomimetic ligand and drug molecules." @default.
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- W2413454296 date "1991-01-01" @default.
- W2413454296 modified "2023-09-23" @default.
- W2413454296 title "Conformational dynamics of the formyl peptide receptor: a prototype for studies of receptor dynamics and binding pocket structure." @default.
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