Tropomyosin pp 250-272 | Cite as

Caldesmon and the Regulation of Cytoskeletal Functions

  • C. -L. Albert Wang
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 644)


Caldesmon (CaD) is an extraordinary actin-binding protein, because in addition to actin, it also binds myosin, calmodulin and tropomyosin. As a component of the smooth muscle and nonmuscle contractile apparatus CaD inhibits the actomyosin ATPase activity and its inhibitory action is modulated by both Ca2+ and phosphorylation. The multiplicity of binding partners and diverse biochemical properties suggest CaD is a potent and versatile regulatory protein both in contractility and cell motility. However, after decades of investigation in numerous laboratories, hard evidence is still lacking to unequivocally identify its in vivo functions, although indirect evidence is mounting to support an important role in connection with the actin cytoskeleton. This chapter reviews the highlights of the past findings and summarizes the current views on this protein, with emphasis of its interaction with tropomyosin.


Smooth Muscle Serum Response Factor Myosin Head Smooth Muscle Myosin Nonmuscle Cell 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Landes Bioscience and Springer Science+Business Media 2008

Authors and Affiliations

  • C. -L. Albert Wang
    • 1
  1. 1.Boston Biomedical Research InstituteWatertownUSA

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