The DOI matches its Crossref record; 1 of the 1 references it cites were found in a registry or an index.
Thapsigargin inhibits the sarcoplasmic or endoplasmic reticulum Ca-ATPase family of calcium pumps.
Open accessAbstract
The role of ATP-dependent calcium uptake into intracellular storage compartments is an essential feature of hormonally induced calcium signaling. Thapsigargin, a non-phorboid tumor promoter, increasingly is being used to manipulate calcium stores because it induces a hormone-like elevation of cytosolic calcium. It has been suggested that thapsigargin acts through inhibition of the endoplasmic reticulum calcium pump. We have directly tested the specificity of thapsigargin on all of the known intracellular-type calcium pumps (referred to as the sarcoplasmic or endoplasmic reticulum Ca-ATPase family (SERCA]. Full-length cDNA clones encoding SERCA1, SERCA2a, SERCA2b, and SERCA3 enzymes were expressed in COS cells, and both calcium uptake and calcium-dependent ATPase activity were assayed in microsomes isolated from them. Thapsigargin inhibited all of the SERCA isozymes with equal potency. Furthermore, similar doses of thapsigargin abolished the calcium uptake and ATPase activity of sarcoplasmic reticulum isolated from fast twitch and cardiac muscle but had no influence on either the plasma membrane Ca-ATPase or Na,K-ATPase. The interaction of thapsigargin with the SERCA isoforms is rapid, stoichiometric, and essentially irreversible. These properties demonstrate that thapsigargin interacts with a recognition site found in, and only in, all members of the endoplasmic and sarcoplasmic reticulum calcium pump family.
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Bradford, M. M. (1976) · Analytical Biochemistry · doi:10.1016/0003-2697(76)90527-3 · Cited by 255,302
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Metadata
- Authors
- Lytton, J., Westlin, M., & Hanley, M. R.
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 1991-09
- Volume
- 266
- Issue
- 26
- Pages
- 17067-17071
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W1593385535
- Cited by
- 1,327
- References
- 1
- FWCI
- 29.95
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Lytton, J., Westlin, M., & Hanley, M. R. (1991). Thapsigargin inhibits the sarcoplasmic or endoplasmic reticulum Ca-ATPase family of calcium pumps. Journal of Biological Chemistry. https://doi.org/10.1016/s0021-9258(19)47340-7
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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