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Homologous desensitization of beta-adrenergic receptor coupled adenylate cyclase. Resensitization by polyethylene glycol treatment.

Publication ,  Journal Article
Strasser, RH; Lefkowitz, RJ
Published in: J Biol Chem
April 25, 1985

Brief (approximately 20-min) exposure of S49 lymphoma cells to beta-agonists such as isoproterenol leads to a homologous form of desensitization in which beta-agonist but not prostaglandin E1-sensitive or NaF-sensitive adenylate cyclase is reduced. The desensitized receptors (R) appear to be sequestered away from the effector system (guanine nucleotide regulatory protein (Ns) and adenylate cyclase (C)). Membrane perturbants such as polyethylene glycol are known to reorient membrane proteins and lipids. Thus, we fused agonist-desensitized S49 lymphoma cells to each other, using polyethylene glycol as fusogen, in an attempt to functionally reunite the R, N, and C components which might have become sequestered in microdomains of the plasma membrane during desensitization. Such treatment completely restored isoproterenol-stimulated adenylate cyclase to normal and re-established the ability of R and N to functionally couple as assessed by the ability to form a high affinity, guanine nucleotide-sensitive state of the receptor. These results support the concept that agonist-promoted sequestration plays a functionally significant role in the homologous desensitization of the beta-adrenergic receptor.

Duke Scholars

Published In

J Biol Chem

ISSN

0021-9258

Publication Date

April 25, 1985

Volume

260

Issue

8

Start / End Page

4561 / 4564

Location

United States

Related Subject Headings

  • Time Factors
  • Sodium Fluoride
  • Receptors, Adrenergic, beta
  • Polyethylene Glycols
  • Membrane Proteins
  • Membrane Lipids
  • Lymphoma
  • Isoproterenol
  • Guanylyl Imidodiphosphate
  • GTP-Binding Proteins
 

Citation

APA
Chicago
ICMJE
MLA
NLM

Published In

J Biol Chem

ISSN

0021-9258

Publication Date

April 25, 1985

Volume

260

Issue

8

Start / End Page

4561 / 4564

Location

United States

Related Subject Headings

  • Time Factors
  • Sodium Fluoride
  • Receptors, Adrenergic, beta
  • Polyethylene Glycols
  • Membrane Proteins
  • Membrane Lipids
  • Lymphoma
  • Isoproterenol
  • Guanylyl Imidodiphosphate
  • GTP-Binding Proteins