User:Alice Harmon/Sandbox 2: Difference between revisions
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CDPKs are monomeric enzymes containing an amino-terminal protein kinase domain linked to a carboxy-terminal calcium-binding regulatory domain, which has sequence similarity to calmodulin, and they belong to the calmodulin-dependent protein kinase family<ref>PMID:1852075</ref>. CDPKs are regulated by the binding of Ca<sup>2+</sup> to the regulatory domain (called the calcium activation domain or CAD), which contains four [[EF hand]] calcium-binding sites. CDPKs are thus are activated by processes that elevate the concentration of calcium inside cells. | CDPKs are monomeric enzymes containing an amino-terminal protein kinase domain linked to a carboxy-terminal calcium-binding regulatory domain, which has sequence similarity to calmodulin, and they belong to the calmodulin-dependent protein kinase family<ref>PMID:1852075</ref>. CDPKs are regulated by the binding of Ca<sup>2+</sup> to the regulatory domain (called the calcium activation domain or CAD), which contains four [[EF hand]] calcium-binding sites. CDPKs are thus are activated by processes that elevate the concentration of calcium inside cells. | ||
Crystal structures of inactive and active conformations of CDPK1 from ''Toxoplasma gondii'' show the | Crystal structures of inactive and active conformations of CDPK1 from ''Toxoplasma gondii'' show the conformation changes that occur upon the binding of calcium to the regulatory domain <ref> PMID:20436473 </ref>. To view compare the two structures click on pairs of green links that have the same number. | ||
Not only is the internal structures of each domain affected, but also the site of interaction of the two domains is completely different. For comparison see [[Eukaryotic Protein Kinase Catalytic Domain]] and [[EF-hand]] for a guides to their structures. | |||