Caldesmon is a protein component of the thin filaments of smooth muscle myofibrils. It is also localized in the stress fibers of fibroblasts.
Caldesmon was identified as a Ca2+/Calmodulin-binding protein with molecular weight of 120-150 kDa (H-Caldesmon) and 70-80 kDa
(L-Caldesmon). H-Caldesmon is the primary isoform in smooth muscle while L-Caldesmon is most abundant in non-muscle cells. Caldesmon
is capable of binding two calmodulin molecules, one at either end of the protein. Additionally, Caldesmon is an actin, myosin, and
tropomyosin-binding protein. Human L-Caldesmon is a protein of 538 amino acids with mobility of 80 kDa. In vitro , L-Caldesmon inhibits
the actomyosin ATPase in an F-Actin-dependent manner. L-Caldesmon may play an important function in motile processes such as secretion
and organelle movement.
原厂资料:
注意事项:
1.Since applications vary, each investigator should titrate the reagent to obtain optimal results.
2.Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.