Cited by 88Receptor Mechanisms and SignalingNeuroscience and Neuropharmacology ResearchProtein Kinase Regulation and GTPase Signaling

Differential Regulation of Type I and Type VIII Ca2+-stimulated Adenylyl Cyclases by Gi-coupled Receptors in Vivo

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Nielsen, Mark D., Chan, Guy C.K., Poser, Steven W., Storm, Daniel R.·1996·Journal of Biological Chemistry

Abstract

Coupling of intracellular Ca2+ to cAMP increases may be important for some forms of synaptic plasticity. The type I adenylyl cyclase (I-AC) is a neural-specific, Ca2+-stimulated enzyme that couples intracellular Ca2+ to cAMP increases. Since optimal cAMP levels may be crucial for some types of synaptic plasticity, mechanisms for inhibition of Ca2+-stimulated adenylyl cyclases may also be important for neuroplasticity. Here we report that Ca2+ stimulation of I-AC is inhibited by activation of Gi-coupled somatostatin and dopamine D2L receptors. This inhibition is due primarily to Gialpha and not betagamma subunits since coexpression of betagamma-binding proteins with I-AC did not affect somatostatin inhibition. However, betagamma released from Gs did inhibit I-AC, indicating that the enzyme can be inhibited by betagamma in vivo. Interestingly, type VIII adenylyl cyclase (VIII-AC), another Ca2+-stimulated adenylyl cyclase, was not inhibited by Gi-coupled receptors. These data indicate that I-AC and VIII-AC are differentially regulated by Gi-coupled receptors and provide distinct mechanisms for interactions between the Ca2+ and cAMP signal transduction systems. We propose that I-AC may be particularly important for synaptic plasticity that depends upon rapid and transient cAMP increases, whereas VIII-AC may contribute to transcriptional-dependent synaptic plasticity that is dependent upon prolonged, Ca2+-stimulated cAMP increases.

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  • AC8 is not stimulated by Gs-coupled receptors, even in the presence of Ca2+.

    “The Ca 2ϩ sensitivity of AC8 is approximately five times lower than AC1 (Villacres et al., 1995), and it is not stimulated by G s -coupled receptors, even in the presence of Ca 2ϩ (Nielsen et al., 1996).”

    From Type I Adenylyl Cyclase Mutant Mice Have Impaired Mossy Fiber Long-Term Potentiation (1998) · cites this paper as Nielsen et al., 1996

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  1. Feany, M. B. (1990) Proc. Natl. Acad. Sci. U. S. A. 87, 2795-2799
  2. Wu, Z. L., Thomas, S. A., Villacres, E. C., Xia, Z., Simmons, M. L., Chavkin, C., Palmiter, R. D., and Storm, D. R. (1995) Proc. Natl. Acad. Sci. U. S. A. 92, 220 -224
  3. Jacobowitz, O., and Iyengar, R. (1994) Proc. Natl. Acad. Sci. U. S. A. 91, 10630 -10634
  4. Yoshimura, M., and Cooper, D. M. (1992) Proc. Natl. Acad. Sci. U. S. A. 89, 6716 -6720
  5. Katsushika, S., Chen, L., Kawabe, J., Nilakantan, R., Halnon, N. J., Homcy, C. J., and Ishikawa, Y. (1992) Proc. Natl. Acad. Sci. U. S. A. 89, 8774 -8778
  6. Katada, T., and Ui, M. (1982) Proc. Natl. Acad. Sci. U. S. A. 79, 3129 -3133
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  8. Inglese, J., Luttrell, L. M., Iniguez-Lluhi, J. A., Touhara, K., Koch, W. J., and Lefkowitz, R. J. (1994) Proc. Natl. Acad. Sci. U. S. A. 91, 3637-3641

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Authors
Nielsen, M. D., Chan, G. C. K., Poser, S. W., & Storm, D. R.
Affiliations
University of Washington (US)
Corresponding author
Storm, Daniel R.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1996-12
Volume
271
Issue
52
Pages
33308-33316
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2066753814
Cited by
88
References
7
Citations by year
2025: 1 · 2022: 1 · 2021: 3 · 2020: 2 · 2019: 2 · 2018: 3 · 2017: 1 · 2016: 2 · 2015: 3 · 2014: 3 · 2013: 5 · 2012: 3
FWCI
2.04
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
Gi-coupled receptors, somatostatin receptors, G protein alpha subunit, cAMP signaling, intracellular calcium, synaptic plasticity, enzyme inhibition, signal transduction
MeSH terms
Calcimycin, Cyclic AMP, Adenylyl Cyclases, Calcium, Carbachol, Cell Line, Dopamine, Humans, Isoproterenol, Membrane Proteins, Nerve Tissue Proteins, Virulence Factors, Bordetella, Somatostatin, Transducin, GTP-Binding Protein alpha Subunits, Gi-Go, Adenylate Cyclase Toxin

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