Results 181 to 190 of about 309,313 (234)
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Annual Review of Biophysics, 2011
P-type ATPases form a large superfamily of cation and lipid pumps. They are remarkably simple with only a single catalytic subunit and carry out large domain motions during transport. The atomic structure of P-type ATPases in different conformations, together with ample mutagenesis evidence, has provided detailed insights into the pumping mechanism by
Palmgren, Michael G., Nissen, Poul
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P-type ATPases form a large superfamily of cation and lipid pumps. They are remarkably simple with only a single catalytic subunit and carry out large domain motions during transport. The atomic structure of P-type ATPases in different conformations, together with ample mutagenesis evidence, has provided detailed insights into the pumping mechanism by
Palmgren, Michael G., Nissen, Poul
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Journal of Bioenergetics and Biomembranes, 1992
The energy dependent exchange of cytoplasmic Na+ for extracellular K+ in mammalian cells is due to a membrane bound enzyme system, the Na,K-ATPase. The exchange sustains a gradient for Na+ into and for K+ out of the cell, and this is used as an energy source for creation of the membrane potential, for its de- and repolarisation, for regulation of ...
Skou, J C, Esmann, Mikael
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The energy dependent exchange of cytoplasmic Na+ for extracellular K+ in mammalian cells is due to a membrane bound enzyme system, the Na,K-ATPase. The exchange sustains a gradient for Na+ into and for K+ out of the cell, and this is used as an energy source for creation of the membrane potential, for its de- and repolarisation, for regulation of ...
Skou, J C, Esmann, Mikael
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Regulation of Ca2+-ATPases,V-ATPases and F-ATPases
2016The biological membranes of cellular organization enfold an important group of membrane proteins called the ATPases, which are not only versatile in maintaining chemical gradient and electrical potential across the membrane but also bring metabolites necessary for cell metabolism and drive out toxins, waste products and solutes that otherwise can curb ...
Sajal Chakraborti, Naranjan S. Dhalla
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1995
Publisher Summary This chapter discusses the role of Ca2+-ATPases in maintaining Ca2+ homeostasis in the cell. The chapter focuses on sarcoplasmic reticular (SR) Ca2+-ATPase(s), which is the primary regulator of the Ca2+ levels and thus, contractility in muscle.
István Édes, Evangelia G. Kranias
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Publisher Summary This chapter discusses the role of Ca2+-ATPases in maintaining Ca2+ homeostasis in the cell. The chapter focuses on sarcoplasmic reticular (SR) Ca2+-ATPase(s), which is the primary regulator of the Ca2+ levels and thus, contractility in muscle.
István Édes, Evangelia G. Kranias
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Molecular and Cellular Biochemistry, 1981
An ecto-adenosine triphosphatase (E.C. 3.6.1.4 ATP-phosphohydrolase) is shown to be localized on the outer surface of varieties of cell membrane. The enzyme is different from the ATPase involved in biological energy transduction and ion transport mechanism.
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An ecto-adenosine triphosphatase (E.C. 3.6.1.4 ATP-phosphohydrolase) is shown to be localized on the outer surface of varieties of cell membrane. The enzyme is different from the ATPase involved in biological energy transduction and ion transport mechanism.
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Regulatory proteins of F1F0-ATPase: Role of ATPase inhibitor
Journal of Bioenergetics and Biomembranes, 1990An intrinsic ATPase inhibitor inhibits the ATP-hydrolyzing activity of mitochondrial F1F0-ATPase and is released from its binding site on the enzyme upon energization of mitochondrial membranes to allow phosphorylation of ADP. The mitochondrial activity to synthesize ATP is not influenced by the absence of the inhibitor protein.
Tadao Hashimoto +2 more
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Journal of Biochemistry, 1995
Sliding machines composed of F-actin and myosin or microtubules and kinesin or dynein convert the free energy of ATP hydrolysis into sliding movements and mechanical work. Development of optical microscopy with micromanipulation techniques has made possible direct observation of single events of sliding exhibited by single sliding machines.
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Sliding machines composed of F-actin and myosin or microtubules and kinesin or dynein convert the free energy of ATP hydrolysis into sliding movements and mechanical work. Development of optical microscopy with micromanipulation techniques has made possible direct observation of single events of sliding exhibited by single sliding machines.
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Crystals of an ATPase fragment of bovine clathrin uncoating ATPase
Journal of Molecular Biology, 1988A 44,000 Mr amino-terminal, clathrin-independent ATPase fragment of the bovine clathrin uncoating ATPase has been crystallized in a form suitable for X-ray diffraction studies. The crystals are orthorhombic, space group P2(1)2(1)2(1), a = 145.3 A, b = 65.0 A, c = 46.9 A, with one protein molecule per asymmetric unit (1 A = 0.1 nm).
Camille Deluca-Flaherty +4 more
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Activation of Mg-ATPase (Spectrin-Dependent ATPase) by Ca^2+
Enzyme, 1979The dependence of saponin-stimulated Mg-ATPase activity in the erythrocyte membrane on Ca2+ concentration was studied. In the membrane of freshly sampled human erythrocytes we found for this enzyme and Ca2+ an apparent dissociation constant of 0.611 mumol/l (SE +/- 0.106 mumol/l) and Hill coefficient of 0.93 (SE +/- 0.05).
M Kodícek +3 more
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1997
Evidence is presented that brush-border membrane vesicles purified from homogenates of rat kidney cortex posses an ecto-enzyme activity that is responsible for the hydrolysis of both ATP and ADP, as well as for the hydrolysis of other nucleoside tri- and diphosphates.
Lorena Griparić +1 more
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Evidence is presented that brush-border membrane vesicles purified from homogenates of rat kidney cortex posses an ecto-enzyme activity that is responsible for the hydrolysis of both ATP and ADP, as well as for the hydrolysis of other nucleoside tri- and diphosphates.
Lorena Griparić +1 more
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