scholarly journals Proton Countertransport and Coupled Gating in the Sarcoplasmic Reticulum Calcium Pump

2018 ◽  
Vol 430 (24) ◽  
pp. 5050-5065 ◽  
Author(s):  
Huan Rui ◽  
Avisek Das ◽  
Robert Nakamoto ◽  
Benoît Roux
Keyword(s):  
Sarcoplasmic Reticulum ◽  
Calcium Pump ◽  
Coupled Gating ◽  
Sarcoplasmic Reticulum Calcium

Invariance of Stoichiometry of the Sarcoplasmic Reticulum Calcium Pump at Physiological Calcium Concentrations – a Reevaluation

1985 ◽  
Vol 40 (7-8) ◽  
pp. 571-575 ◽  
Author(s):  
Wilhelm Hasselbach ◽  
Andrea Migala
Keyword(s):  
Sarcoplasmic Reticulum ◽  
Calcium Level ◽  
Calcium Concentration ◽  
Calcium Uptake ◽  
Atp Hydrolysis ◽  
Calcium Pump ◽  
Oxalate Precipitation ◽  
Sarcoplasmic Reticulum Calcium ◽  
Internal Calcium ◽  
External Calcium

Abstract The decline of the transport ratio of the sarcoplasmic calcium pump observed in a recent study (A. results from the retardation of calcium oxalate precipitation at low calcium/protein ratios. The prevailing high internal calcium level supports a rapid calcium backflux and a compensatory ATP hydrolysis during net calcium uptake which reduces the transport ratio. Yet, the determined calcium back­ flux does not fully account for the decline of the transport ratio. A supposed modulation of the stoichiometry of the pump by external calcium (0.1 μм) is at variance with results of previous studies showing a constant transport ratio of two in the same calcium concentration range.

scholarly journals Kinetic characterization of the normal and procaine-perturbed reaction cycles of the sarcoplasmic reticulum calcium pump

1991 ◽  
Vol 202 (2) ◽  
pp. 559-567 ◽  
Author(s):  
Fernando HENAO ◽  
Beatrice FORESTA ◽  
Stephane ORLOWSKI ◽  
Ana CUENDA ◽  
Carlos GUTIERREZ-MERINO ◽  
...  
Keyword(s):  
Sarcoplasmic Reticulum ◽  
Calcium Pump ◽  
Kinetic Characterization ◽  
Reaction Cycles ◽  
Sarcoplasmic Reticulum Calcium
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