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) (8–10). The equilibrium between the blocked and closed states is Ca2 +- sensitive , and strong S1 binding is required in order to switch the thin filament completely into the open state. X-ray diffraction ...
). Consistent with the effects of myosin binding to actin and sensitizing the thin filament to Ca2 + in cardiac muscle,36,37 addition of myosin S1 reverses the thin filament -induced desensitization, even though ...
relatively low sensitivity for Ca2 + concentration in the narrow subspace between L-type Ca2 + channels and RyR, cSS, while CIRC deactivation is much slower although more sensitive to the Ca2 + concentration ...
in lily pollen tubes induced by the elevation of cytosolic Ca2 + concentration using the Ca2 + ionophore A23187. They predicted the presence of a Ca2 +- sensitive actin filament severing factor(s) responsible ...
protein insensitive to Ca2 +-CaM. However, it may also be that P-135-ABP that is insensitive to Ca2 +-CaM is inherently present in lily pollen tubes and works to form thin bundles of actin filaments ...
are cylindrically-shaped, 2 μm length units made of a regular arrangement of thick and thin filaments . The former, also known as myosin filaments (MF), are mainly made of the protein myosin, while the latter are made ...
of Ca2 + in vitro. RIC1 Caps Actin Filaments in Vitro We next sought to determine whether RIC1 associates with actin filaments after its severing. To determine this, prepolymerized short actin filaments ...
by active efflux of H+ (6). The increase in Ca2 + concentration affects the motor activity of myosin (7) through the associated calmodulin light chain (not shown). Regulation of actin filaments ...
in myofilament Ca2 + sensitivity , may be an important factor in the decreased contractility associated with myocardial ischemia (38–40). This depressed Ca2 + sensitivity may be ascribed to either a direct effect ...
/GSL2 forms a thin callose layer in young microspores, which is needed as scaffold for proper exine deposition and patterning (Dong et al., 2005). CalS5/GSL2 presents a Ca2 +-binding domain in the central ...
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