How Ca2+-ATPase pumps ions across the sarcoplasmic reticulum membrane
- PMID: 19010358
- DOI: 10.1016/j.bbamcr.2008.10.008
How Ca2+-ATPase pumps ions across the sarcoplasmic reticulum membrane
Abstract
Ca2+-ATPase of muscle sarcoplasmic reticulum is an ATP-powered Ca2+-pump that establishes a >10,000 fold concentration gradient across the membrane. Its crystal structures have been determined for 9 different states that cover nearly the entire reaction cycle. Presented here is a brief structural account of the ion pumping process, with emphasis on why the structure has to be so.
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