G_q/11-dependent regulation of endosomal cAMP generation by parathyroid hormone class B GPCR.

ABSTRACT: cAMP production upon activation of G_s by G protein-coupled receptors has classically been considered to be plasma membrane-delimited, but a shift in this paradigm has occurred in recent years with the identification of several receptors that continue to signal from early endosomes after internalization. The molecular mechanisms regulating this aspect of signaling remain incompletely understood. Here, we investigated the role of G_q/11 activation by the parathyroid hormone (PTH) type 1 receptor (PTHR) in mediating endosomal cAMP responses. Inhibition of G_q/11 signaling by FR900359 markedly reduced the duration of PTH-induced cAMP production, and this effect was mimicked in cells lacking endogenous Gα_q/11 We determined that modulation of cAMP genera

SUBMITTER: White AD 

PROVIDER: S-EPMC7132270 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature