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Na+/H+ exchanger regulatory factor 2 directs parathyroid hormone 1 receptor signalling

Author

Listed:
  • Matthew J. Mahon

    (Harvard Medical School)

  • Mark Donowitz

    (Gastroenterology Division, The Johns Hopkins University School of Medicine)

  • C. Chris Yun

    (Gastroenterology Division, The Johns Hopkins University School of Medicine)

  • Gino V. Segre

    (Harvard Medical School)

Abstract

The parathyroid hormone 1 receptor (PTH1R) is a class II G-protein-coupled receptor1. PTH1R agonists include both PTH, a hormone that regulates blood calcium and phosphate, and PTH-related protein (PTHrP), a paracrine/autocrine factor that is essential for development, particularly of the skeleton. Adenylyl cyclase activation is thought to be responsible for most cellular responses to PTH and PTHrP, although many actions appear to be independent of adenylyl cyclase1,2,3,4,5. Here we show that the PTH1R binds to Na+/H+ exchanger regulatory factors (NHERF) 1 and 2 through a PDZ-domain interaction in vitro and in PTH target cells. NHERF2 simultaneously binds phospholipase Cβ1 and an atypical, carboxyl-terminal PDZ consensus motif, ETVM, of the PTH1R through PDZ1 and PDZ2, respectively. PTH treatment of cells that express the NHERF2–PTH1R complex markedly activates phospholipase Cβ and inhibits adenylyl cyclase through stimulation of inhibitory G proteins (Gi/o proteins). NHERF-mediated assembly of PTH1R and phospholipase Cβ is a unique mechanism to regulate PTH signalling in cells and membranes of polarized cells that express NHERF, which may account for many tissue- and cell-specific actions of PTH/PTHrP and may also be relevant to signalling by many G-protein-coupled receptors.

Suggested Citation

  • Matthew J. Mahon & Mark Donowitz & C. Chris Yun & Gino V. Segre, 2002. "Na+/H+ exchanger regulatory factor 2 directs parathyroid hormone 1 receptor signalling," Nature, Nature, vol. 417(6891), pages 858-861, June.
    • Handle: RePEc:nat:nature:v:417:y:2002:i:6891:d:10.1038_nature00816
    DOI: 10.1038/nature00816
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    Cited by:

    1. Nishaben M. Patel & Léa Ripoll & Chloe J. Peach & Ning Ma & Emily E. Blythe & Nagarajan Vaidehi & Nigel W. Bunnett & Mark von Zastrow & Sivaraj Sivaramakrishnan, 2024. "Myosin VI drives arrestin-independent internalization and signaling of GPCRs," Nature Communications, Nature, vol. 15(1), pages 1-15, December.

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