S‐100a0 protein stimulates Ca2+ ‐induced Ca2+ release from isolated sarcoplasmic reticulum vesicles
- 25 September 1989
- journal article
- Published by Wiley in FEBS Letters
- Vol. 255 (2), 381-384
- https://doi.org/10.1016/0014-5793(89)81127-5
Abstract
S-100a0 protein, the αα-isoform of the S-100 family, stimulates Ca2+ -induced Ca2+ release from terminal cisternae isolated from rat skeletal muscle cells. The stimulatory effect of S-100a0 is maximal at ∼5 μM S-100a0 and half maximal at ∼0.1 μM S-100a0, at 1.8 μM free Ca2+ in the presence of 5 mM Mg2+ plus 0.1 M KCl. The effect of the protein on Ca2+ -induced Ca2+ release is completely inhibted by the calcium release blocker, ruthenium red.Keywords
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