Skip to main content
Journal cover image

Comparative rates of desensitization of beta-adrenergic receptors by the beta-adrenergic receptor kinase and the cyclic AMP-dependent protein kinase.

Publication ,  Journal Article
Roth, NS; Campbell, PT; Caron, MG; Lefkowitz, RJ; Lohse, MJ
Published in: Proc Natl Acad Sci U S A
July 15, 1991

Three separate processes may contribute to rapid beta-adrenergic receptor desensitization: functional uncoupling from the stimulatory guanine nucleotide-binding protein Gs, mediated by phosphorylation of the receptors by two distinct kinases, the specific beta-adrenergic receptor kinase (beta ARK) and the cyclic AMP-dependent protein kinase A (PKA), as well as a spatial uncoupling via sequestration of the receptors away from the cell surface. To evaluate the relative importance and potential role of the various processes in different physiological situations, a kinetic analysis of these three mechanisms was performed in permeabilized A431 epidermoid carcinoma cells. To allow a separate analysis of each mechanism, inhibitors of the various desensitization mechanisms were used: heparin to inhibit beta ARK, the PKA inhibitor peptide PKI to inhibit PKA, and concanavalin A treatment to prevent sequestration. Isoproterenol-induced phosphorylation of beta 2 receptors in these cells by beta ARK occurred with a t1/2 of less than 20 sec, whereas phosphorylation by PKA had a t1/2 of about 2 min. Similarly, beta ARK-mediated desensitization of the receptors proceeded with a t1/2 of less than 15 sec, and PKA-mediated desensitization with a t1/2 of about 3.5 min. Maximal desensitization mediated by the two kinases corresponded to a reduction of the signal-transduction capacity of the receptor/adenylyl cyclase system by about 60% in the case of beta ARK and by about 40% in the case of PKA. Receptor sequestration was much slower (t1/2 of about 10 min) and involved no more than 30% of the cell surface receptors. It is concluded that beta ARK-mediated phosphorylation is the most rapid and quantitatively most important factor contributing to the rapid desensitization. This rapidity of the beta ARK-mediated mechanism makes it particularly well suited to regulate beta-adrenergic receptor function in rapidly changing environments such as the synaptic cleft.

Duke Scholars

Published In

Proc Natl Acad Sci U S A

DOI

ISSN

0027-8424

Publication Date

July 15, 1991

Volume

88

Issue

14

Start / End Page

6201 / 6204

Location

United States

Related Subject Headings

  • beta-Adrenergic Receptor Kinases
  • Receptors, Adrenergic, beta
  • Protein Kinases
  • Kinetics
  • Isoproterenol
  • Humans
  • GTP-Binding Proteins
  • Cyclic AMP-Dependent Protein Kinases
  • Concanavalin A
  • Cell Membrane Permeability
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Roth, N. S., Campbell, P. T., Caron, M. G., Lefkowitz, R. J., & Lohse, M. J. (1991). Comparative rates of desensitization of beta-adrenergic receptors by the beta-adrenergic receptor kinase and the cyclic AMP-dependent protein kinase. Proc Natl Acad Sci U S A, 88(14), 6201–6204. https://doi.org/10.1073/pnas.88.14.6201
Roth, N. S., P. T. Campbell, M. G. Caron, R. J. Lefkowitz, and M. J. Lohse. “Comparative rates of desensitization of beta-adrenergic receptors by the beta-adrenergic receptor kinase and the cyclic AMP-dependent protein kinase.Proc Natl Acad Sci U S A 88, no. 14 (July 15, 1991): 6201–4. https://doi.org/10.1073/pnas.88.14.6201.
Roth NS, Campbell PT, Caron MG, Lefkowitz RJ, Lohse MJ. Comparative rates of desensitization of beta-adrenergic receptors by the beta-adrenergic receptor kinase and the cyclic AMP-dependent protein kinase. Proc Natl Acad Sci U S A. 1991 Jul 15;88(14):6201–4.
Roth, N. S., et al. “Comparative rates of desensitization of beta-adrenergic receptors by the beta-adrenergic receptor kinase and the cyclic AMP-dependent protein kinase.Proc Natl Acad Sci U S A, vol. 88, no. 14, July 1991, pp. 6201–04. Pubmed, doi:10.1073/pnas.88.14.6201.
Roth NS, Campbell PT, Caron MG, Lefkowitz RJ, Lohse MJ. Comparative rates of desensitization of beta-adrenergic receptors by the beta-adrenergic receptor kinase and the cyclic AMP-dependent protein kinase. Proc Natl Acad Sci U S A. 1991 Jul 15;88(14):6201–6204.
Journal cover image

Published In

Proc Natl Acad Sci U S A

DOI

ISSN

0027-8424

Publication Date

July 15, 1991

Volume

88

Issue

14

Start / End Page

6201 / 6204

Location

United States

Related Subject Headings

  • beta-Adrenergic Receptor Kinases
  • Receptors, Adrenergic, beta
  • Protein Kinases
  • Kinetics
  • Isoproterenol
  • Humans
  • GTP-Binding Proteins
  • Cyclic AMP-Dependent Protein Kinases
  • Concanavalin A
  • Cell Membrane Permeability