calcium ATPasemedical dictionary

<enzyme>

<cell biology> Usually used of the calcium pumping ATPase present in high concentration as an integral membrane protein of the sarcoplasmic reticulum of muscle.

This pump lowers the cytoplasmic calcium level and causes contraction to stop. Normal function of the pump seems to require a local phospholipid environment from which cholesterol is excluded.

This entry appears with permission from the Dictionary of Cell and Molecular Biology

(11 Mar 2008)