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  Distinct glycerophospholipids potentiate Gsα-activated adenylyl cyclase activity

Seth, A., Landau, M., Shevchenko, A., Schultz, A., Elsabbagh, S., & Schultz, J. (2022). Distinct glycerophospholipids potentiate Gsα-activated adenylyl cyclase activity. Cellular Signalling, 97: 110396. doi:10.1016/j.cellsig.2022.110396.

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 Creators:
Seth, A1, Author           
Landau, M, Author
Shevchenko, A, Author
Schultz, A, Author
Elsabbagh, S, Author
Schultz, JE, Author
Affiliations:
1Department Protein Evolution, Max Planck Institute for Biology Tübingen, Max Planck Society, ou_3371683              

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 Abstract: Nine mammalian adenylyl cyclases (AC) are pseudoheterodimers with two hexahelical membrane domains, which are isoform-specifically conserved. Previously we proposed that these membrane domains are orphan receptors (https://doi.org/10.7554/eLife.13098; https://doi.org/10.1016/j.cellsig.2020.109538). Lipids extracted from fetal bovine serum at pH 1 inhibited several mAC activities. Guided by a lipidomic analysis we tested glycerophospholipids as potential ligands. Contrary to expectations we surprisingly discovered that 1-stearoyl-2-docosahexaenoyl-phosphatidic acid (SDPA) potentiated Gsα-activated activity of human AC isoform 3 seven-fold. The specificity of fatty acyl esters at glycerol positions 1 and 2 was rather stringent. 1-Stearoyl-2-docosahexaenoyl-phosphatidylserine and 1-stearoyl-2-docosahexaenoyl-phosphatidylethanolamine significantly potentiated several Gsα-activated mAC isoforms to different extents. SDPA appears not interact with forskolin activation of AC isoform 3. SDPA enhanced Gsα-activated AC activities in membranes from mouse brain cortex. The action of SDPA was reversible. Unexpectedly, SDPA did not affect cAMP generation in HEK293 cells stimulated by isoproterenol, PGE2 and adenosine, virtually excluding a role as an extracellular ligand and, instead, suggesting an intracellular role. In summary, we discovered a new dimension of intracellular AC regulation by chemically defined glycerophospholipids.

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 Dates: 2022-092022-09
 Publication Status: Issued
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.cellsig.2022.110396
PMID: 35787445
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Title: Cellular Signalling
  Other : Cell. Signal.
Source Genre: Journal
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Publ. Info: Oxford : Pergamon
Pages: 8 Volume / Issue: 97 Sequence Number: 110396 Start / End Page: - Identifier: ISSN: 0898-6568
CoNE: https://pure.mpg.de/cone/journals/resource/954925561579