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Johns Hopkins scientists identify a key to body's use of free calcium
Date:1/23/2014

d attached them to calcium channels, calmodulin and CaBP4. When two molecules locked together, the color changed. By measuring color changes, the researchers could then tell which molecules bound to each other.

"Our experiments established that calmodulin and calcium-binding proteins work by binding to distinct parts of the calcium channel," Yue says. "More generally, we have been able to investigate how large molecules such as these function in living cells."

The "live light show" permitted by the use of light markers should help scientists develop new drugs that target calcium channels, Yue adds. Some such drugs already exist, including calcium channel blockers that lower blood pressure by targeting a particular kind of calcium channel found in blood vessels.

Blocking calcium channels might help with other diseases, too, Yue says. For example, researchers have found that an overload of calcium in certain parts of the brain may drive some neurodegenerative diseases, such as Parkinson's. Blocking the calcium channels found in those trouble spots the kind of calcium channels in Yue's study could be a way to fight the debilitating brain disease.


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Contact: Catherine Kolf
ckolf@jhmi.org
443-287-2251
Johns Hopkins Medicine
Source:Eurekalert

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