• Register
X
Forgot Password

If you have forgotten your password you can enter your email here and get a temporary password sent to your email.

X

Leaving Community

Are you sure you want to leave this community? Leaving the community will revoke any permissions you have been granted in this community.

No
Yes

The beta2-adrenergic receptor interacts with the Na+/H+-exchanger regulatory factor to control Na+/H+ exchange.

Stimulation of beta2-adrenergic receptors on the cell surface by adrenaline or noradrenaline leads to alterations in the metabolism, excitability, differentiation and growth of many cell types. These effects have traditionally been thought to be mediated exclusively by receptor activation of intracellular G proteins. However, certain physiological effects of beta2-adrenergic receptor stimulation, notably the regulation of cellular pH by modulation of Na+/H+ exchanger (NHE) function, do not seem to be entirely dependent on G-protein activation. We report here a direct agonist-promoted association of the beta2-adrenergic receptor with the Na+/H+ exchanger regulatory factor (NHERF), a protein that regulates the activity of the Na+/H+ exchanger type 3 (NHE3). NHERF binds to the beta2-adrenergic receptor by means of a PDZ-domain-mediated interaction with the last few residues of the carboxy-terminal cytoplasmic domain of the receptor. Mutation of the final residue of the beta2-adrenergic receptor from leucine to alanine abolishes the receptor's interaction with NHERF and also markedly alters beta2-adrenergic receptor regulation of NHE3 in cells without altering receptor-mediated activation of adenylyl cyclase. Our findings indicate that agonist-dependent beta2-adrenergic receptor binding of NHERF plays a role in beta2-adrenergic receptor-mediated regulation of Na+/H+ exchange.

Pubmed ID: 9560162

Authors

  • Hall RA
  • Premont RT
  • Chow CW
  • Blitzer JT
  • Pitcher JA
  • Claing A
  • Stoffel RH
  • Barak LS
  • Shenolikar S
  • Weinman EJ
  • Grinstein S
  • Lefkowitz RJ

Journal

Nature

Publication Data

April 9, 1998

Associated Grants

None

Mesh Terms

  • Adrenergic beta-2 Receptor Agonists
  • Amino Acid Sequence
  • Animals
  • CHO Cells
  • Cattle
  • Cell Line
  • Cricetinae
  • Glutathione Transferase
  • Humans
  • Hydrogen
  • Hydrogen-Ion Concentration
  • Molecular Sequence Data
  • Mutation
  • Phosphoproteins
  • Protein Binding
  • Rabbits
  • Receptors, Adrenergic, beta-2
  • Recombinant Fusion Proteins
  • Sodium
  • Sodium-Hydrogen Antiporter