Title : Calmodulin interaction with the skeletal muscle sarcoplasmic reticulum calcium channel protein.

Pub. Date : 1994 Jan 18

PMID : 8286381






7 Functional Relationships(s)
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1 Wheat germ calmodulin was derivatized with rhodamine-x-maleimide. rhodamine-x-maleimide CaM5 Triticum aestivum
2 The affinity and binding capacity of the channel protein in SR vesicles for the derivatized calmodulin (Rh-CaM) were determined by fluorescence anisotropy in the presence of (1) 1 mM EGTA, (2) 0.1 mM CaCl2, and (3) 0.1 mM CaCl2 plus 1 mM MgCl2. Egtazic Acid CaM5 Triticum aestivum
3 The affinity and binding capacity of the channel protein in SR vesicles for the derivatized calmodulin (Rh-CaM) were determined by fluorescence anisotropy in the presence of (1) 1 mM EGTA, (2) 0.1 mM CaCl2, and (3) 0.1 mM CaCl2 plus 1 mM MgCl2. Calcium Chloride CaM5 Triticum aestivum
4 The affinity and binding capacity of the channel protein in SR vesicles for the derivatized calmodulin (Rh-CaM) were determined by fluorescence anisotropy in the presence of (1) 1 mM EGTA, (2) 0.1 mM CaCl2, and (3) 0.1 mM CaCl2 plus 1 mM MgCl2. Calcium Chloride CaM5 Triticum aestivum
5 The affinity and binding capacity of the channel protein in SR vesicles for the derivatized calmodulin (Rh-CaM) were determined by fluorescence anisotropy in the presence of (1) 1 mM EGTA, (2) 0.1 mM CaCl2, and (3) 0.1 mM CaCl2 plus 1 mM MgCl2. Magnesium Chloride CaM5 Triticum aestivum
6 In the presence of EGTA, Rh-CaM bound to the channel protein with a Kd of 8.6 +/- 0.8 nM and a Bmax of 229 +/- 7 pmol/mg, suggesting that calmodulin binds to the channel protein at [Ca2+] comparable to that in resting muscle. Egtazic Acid CaM5 Triticum aestivum
7 In the presence of EGTA, Rh-CaM bound to the channel protein with a Kd of 8.6 +/- 0.8 nM and a Bmax of 229 +/- 7 pmol/mg, suggesting that calmodulin binds to the channel protein at [Ca2+] comparable to that in resting muscle. rh-cam CaM5 Triticum aestivum