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2016 ; 111
(5
): 917-20
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Absolute Ligand Discrimination by Dimeric Signaling Receptors
#MMPMID27602720
Fathi S
; Nayak CR
; Feld JJ
; Zilman AG
Biophys J
2016[Sep]; 111
(5
): 917-20
PMID27602720
show ga
Many signaling pathways act through shared components, where different ligand
molecules bind the same receptors or activate overlapping sets of response
regulators downstream. Nevertheless, different ligands acting through cross-wired
pathways often lead to different outcomes in terms of the target cell behavior
and function. Although a number of mechanisms have been proposed, it still
largely remains unclear how cells can reliably discriminate different molecular
ligands under such circumstances. Here we show that signaling via ligand-induced
receptor dimerization-a very common motif in cellular signaling-naturally
incorporates a mechanism for the discrimination of ligands acting through the
same receptor.