Crossref journal-article
American Association for the Advancement of Science (AAAS)
Science (221)
Abstract

Guanine nucleotide binding (G) proteins (subunit composition αβγ) dissociate on activation with guanosine triphosphate (GTP) analogs and magnesium to give α-guanine nucleotide complexes and free βγ subunits. Whether the opening of potassium channels by the recently described G k in isolated membrane patches from mammalian atrial myocytes was mediated by the α k subunit or βγ dimer was tested. The α k subunit was found to be active, while the βγ dimer was inactive in stimulating potassium channel activity. Thus, G k resembles G s , the stimulatory regulatory component of adenylyl cyclase, and transducin, the regulatory component of the visual system, in that it regulates its effector function—the activity of the ligand-gated potassium channel—through its guanine nucleotide binding subunit.

Bibliography

Codina, J., Yatani, A., Grenet, D., Brown, A. M., & Birnbaumer, L. (1987). The α Subunit of the GTP Binding Protein G k Opens Atrial Potassium Channels. Science, 236(4800), 442–445.

Authors 5
  1. Juan Codina (first)
  2. Atsuko Yatani (additional)
  3. Dagoberto Grenet (additional)
  4. Arthur M. Brown (additional)
  5. Lutz Birnbaumer (additional)
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Dates
Type When
Created 18 years, 10 months ago (Oct. 5, 2006, 4:28 p.m.)
Deposited 1 year, 7 months ago (Jan. 12, 2024, 9:47 a.m.)
Indexed 1 month, 3 weeks ago (July 2, 2025, 2:46 p.m.)
Issued 38 years, 4 months ago (April 24, 1987)
Published 38 years, 4 months ago (April 24, 1987)
Published Print 38 years, 4 months ago (April 24, 1987)
Funders 0

None

@article{Codina_1987, title={The α Subunit of the GTP Binding Protein G k Opens Atrial Potassium Channels}, volume={236}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.2436299}, DOI={10.1126/science.2436299}, number={4800}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Codina, Juan and Yatani, Atsuko and Grenet, Dagoberto and Brown, Arthur M. and Birnbaumer, Lutz}, year={1987}, month=apr, pages={442–445} }