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Hanahisa et al., Biol Pharm Bull 1999 : The present study suggests that regucalcin plays an inhibitory role in the regulation of ATPase activity in the brain cytosol of rats of different ages
Yamaguchi et al., Mol Cell Biochem 1999 : The presence of regucalcin ( 10 ( -9 ) to 10 ( -7 ) M ) in the enzyme reaction mixture caused a significant decrease in Ca2+-ATPase activity in the brain microsomes of young rats ( 5 weeks old ) ... The present study demonstrates that regucalcin is expressed in the brain, and that it can uniquely inhibit Ca2+-ATPase activity in the brain microsomes of rats ... The findings suggest that regucalcin plays a role in the regulation of microsomal Ca2+-ATPase activity in rat brain tissues
Tsurusaki et al., J Cell Biochem 2000 : The role of endogenous regucalcin in the regulation of Ca ( 2+ ) -ATPase , a Ca ( 2+ ) sequestrating enzyme, in rat liver nuclei was investigated
Yamaguchi et al., J Cell Biochem 2002 (Body Weight) : Regucalcin inhibited protein phosphatase activity in rat kidney cortex cytosol and activated Ca2+-ATPase activity in rat heart muscle microsomes
Akhter et al., Int J Mol Med 2006 : Regucalcin increases Ca2+-ATPase activity in the heart mitochondria of normal and regucalcin transgenic rats ... The role of regucalcin , a regulatory protein in intracellular signaling system, in the regulation of Ca2+-ATPase activity in rat heart mitochondria was investigated ... Regucalcin did not have a significant effect on mitochondrial Mg2+-ATPase activity ... Regucalcin ( 10 ( -9 ) M ) did not have a significant effect on Ca2+-ATPase activity in the presence of digitonin ( 10 ( -3 ) or 10 ( -2 ) % ), which is a solubilization effect on membranous lipids
Mori et al., Chem Pharm Bull (Tokyo) 1991 : Regucalcin ( 2.0 microM ) did not increase the mitochondrial adenosine triphosphatase (ATPase) activity during 3.0 min after Ca2+ addition
Yamaguchi et al., Chem Pharm Bull (Tokyo) 1989 : The effect of regucalcin , a calcium binding protein isolated from rat liver cytosol, on Ca2+-adenosine triphosphatase (ATPase) activity in hepatic microsomes was investigated ... Also, Mg2+-ATPase activity was increased ( about 1.6-fold ) by the presence of regucalcin ( 2.0 and 4.0 microM ) ... Regucalcin ( 2.0 microM ) did not enhance the effect of V5+ and Cd2+ on Ca2+-ATPase activity ... The present finding, that regucalcin activates hepatic microsomal Ca2+-ATPase , suggests a cell physiological role of regucalcin as an activator in the microsomal Ca2+-pump activity
Takahashi et al., Mol Cell Biochem 1995 : Now, the activating effect of regucalcin ( 0.25 microM ) on hepatic plasma membrane ( Ca ( 2+ ) -Mg2+ ) -ATPase was not inhibited by vanadate addition
Takahashi et al., Mol Cell Biochem 1994 : Activating effect of regucalcin on ( Ca ( 2+ ) -Mg2+ ) -ATPase in rat liver plasma membranes : relation to sulfhydryl group ... Regucalcin ( 0.25-1.0 microM ) significantly increased ( Ca ( 2+ ) -Mg2+ ) -ATPase activity ... The present results suggest that regucalcin activates ( Ca ( 2+ ) -Mg2+ ) -ATPase by the binding to liver plasma membrane lipids, and that the activation is involved in the SH groups which are an active site of the enzyme
Takahashi et al., Mol Cell Biochem 1993 : Regulatory effect of regucalcin on ( Ca ( 2+ ) -Mg2+ ) -ATPase in rat liver plasma membranes : comparison with the activation by Mn2+ and Co2+ ... The effect of various metals and regucalcin , a calcium binding protein isolated from rat liver cytosol, on ( Ca ( 2+ ) -Mg2+ ) -ATPase activity in the plasma membranes of rat liver was investigated ... The present results suggest that regucalcin activates directly ( Ca ( 2+ ) -Mg2+ ) -ATPase in liver plasma membranes, and that the activation is not involved in the Ca ( 2+ ) -dependent phosphorylation of the enzyme
Takahashi et al., Mol Cell Biochem 1996 : Activatory effect of regucalcin on hepatic plasma membrane ( Ca ( 2+ ) -Mg2+ ) -ATPase is impaired by liver injury with carbon tetrachloride administration in rats
Takahashi et al., Mol Cell Biochem 1997 : ( Ca ( 2+ ) - Mg2+ ) -ATPase activity in the liver plasma membranes was significantly increased by the presence of regucalcin ( 0.1-0.5 microM ) in the enzyme reaction mixture ... These results demonstrate that regucalcin activates ( Ca ( 2+ ) -Mg2+ ) -ATPase in the liver plasma membranes and that it can stimulate ATP dependent calcium transport across the plasma membranes
Kurota et al., Mol Cell Biochem 1997 : Also, the activatory effect of regucalcin on Ca ( 2+ ) -ATPase was appreciably inhibited by addition of dibutyryl cAMP ( 10 ( -5 ) and 10 ( -3 ) M ), while inositol 1,4,5-trisphosphate ( 10 ( -7 ) and 10 ( -5 ) M ) had no effect
Kurota et al., Mol Cell Biochem 1997 : Regucalcin increases Ca2+-ATPase activity and ATP dependent calcium uptake in the microsomes of rat kidney cortex ... The presence of regucalcin ( 10 [ -8 ] to 10 [ -6 ] M ) in the reaction mixture caused a significant increase in Ca2+-ATPase activity and ATP dependent 45Ca2+ uptake in the microsomes ... Regucalcin ( 10 [ -7 ] M ) increased Ca2+-ATPase activity independently of increasing concentrations of CaCl2 ... The effect of regucalcin ( 10 [ -7 ] M ) on Ca2+ATPase activity and 45Ca2+ uptake was weakened in the presence of DcAMP or IP3