Article
Contribution of distinct structural elements to activation of calpain by Ca2+ ions.
The Journal of biological chemistry - 7 May 2004
Alexa Anita, Bozóky Zoltán, Farkas Attila, Tompa Peter, Friedrich Peter
Abstract excerpt
The effect of Ca2+ in calpain activation is mediated via several binding sites in the enzyme molecule. To test the contribution of structural elements suspected to be part of this Ca2+ relay system, we made a site-directed mutagenesis study on calpains, measuring consequential changes in Ca2+ binding and Ca2+ sensitivity of enzyme activity. Evidence is provided for earlier suggestions that an acidic loop in...
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