The extracellular loop 2 (ECL2) of the human histamine H4 receptor substantially contributes to ligand binding and constitutive activity

URN to cite this document:: urn:nbn:de:bvb:355-epub-309279
DOI to cite this document:: 10.5283/epub.30927

Wifling, David ; Bernhardt, Günther ; Dove, Stefan ; Buschauer, Armin

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Date of publication of this fulltext: 07 Jan 2015 09:55

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Abstract

In contrast to the corresponding mouse and rat orthologs, the human histamine H4 receptor (hH4R) shows extraordinarily high constitutive activity. In the extracellular loop, replacement of F169 by V as in the mouse H4R significantly reduced constitutive activity. Stabilization of the inactive state was even more pronounced for a double mutant, in which, in addition to F169V, S179 in the ligand ...