When 7 transmembrane receptors are not G protein-coupled receptors.

Published

Journal Article (Review)

Classically, 7 transmembrane receptors transduce extracellular signals by coupling to heterotrimeric G proteins, although recent in vitro studies have clearly demonstrated that they can also signal via G protein-independent mechanisms. However, the physiologic consequences of this unconventional signaling, particularly in vivo, have not been explored. In this issue of the JCI, Zhai et al. demonstrate in vivo effects of G protein-independent signaling by the angiotensin II type 1 receptor (AT1R) (see the related article beginning on page 3045). In studies of the mouse heart, they compare the physiologic and biochemical consequences of transgenic cardiac-specific overexpression of a mutant AT1R incapable of G protein coupling with those of a wild-type receptor. Their results not only provide the first glimpse of the physiologic effects of this newly appreciated mode of signaling but also provide important and previously unappreciated clues as to the underlying molecular mechanisms.

Full Text

Duke Authors

Cited Authors

  • Rajagopal, K; Lefkowitz, RJ; Rockman, HA

Published Date

  • November 2005

Published In

Volume / Issue

  • 115 / 11

Start / End Page

  • 2971 - 2974

PubMed ID

  • 16276410

Pubmed Central ID

  • 16276410

International Standard Serial Number (ISSN)

  • 0021-9738

Digital Object Identifier (DOI)

  • 10.1172/JCI26950

Language

  • eng

Conference Location

  • United States