Encyclopedia of Metalloproteins

2013 Edition
| Editors: Robert H. Kretsinger, Vladimir N. Uversky, Eugene A. Permyakov

Calmodulin

  • David O’Connell
  • Mikael Bauer
  • Christopher B. Marshall
  • Mitsu Ikura
  • Sara Linse
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-1533-6_67

Synonyms

Definitions

  • EF-hand: Helix-loop-helix motif obeying a 29-residue consensus sequence with hydrophobic and Ca2+-ligating residues in defined positions, typically forming a pentagonal bipyramidal coordination sphere

  • Ca2+-signaling proteins: Proteins for which Ca2+ binding preferentially stabilizes a form that activates other proteins

  • Domain: Independent folding unit

  • Chromophoric chelator: A metal-binding dye which changes its optical spectrum upon chelation

Discovery

The discovery of calmodulin (CaM) was reported in 1970 independently by Cheung and by Kakiuchi, Yamazaki, and Nakajima. They found that cyclic nucleotide phosphodiesterase was modulated by a Ca2+-dependent activator protein, which was named calmodulin for calcium-modulated protein.

Prevalence

CaM is a 17-kDa protein ubiquitously expressed in eukaryotic cells constituting at least 0.1% of total cellular protein, with higher abundance in brain and...

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References

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • David O’Connell
    • 1
  • Mikael Bauer
    • 2
  • Christopher B. Marshall
    • 3
  • Mitsu Ikura
    • 3
  • Sara Linse
    • 2
  1. 1.University College Dublin, Conway InstituteDublinIreland
  2. 2.Department of Biochemistry and Structural BiologyLund University, Chemical CentreLundSweden
  3. 3.Ontario Cancer Institute and Department of Medical BiophysicsUniversity of TorontoTorontoCanada