What is the full meaning of ATPase?
adenosine triphosphatase
(ā′tē-pē′ās, -āz) An enzyme that catalyzes the formation of ATP from ADP, inorganic phosphate, and energy, found in mitochondria and chloroplasts; adenosine triphosphatase. Also called ATP synthase.
What is ATPase mention its parts role and functioning?
The ATP synthase of mitochondria and chloroplasts is an anabolic enzyme that harnesses the energy of a transmembrane proton gradient as an energy source for adding an inorganic phosphate group to a molecule of adenosine diphosphate (ADP) to form a molecule of adenosine triphosphate (ATP).
What is the function of Na K ATPase?
[3][4] The Na+K+-ATPase pump helps to maintain osmotic equilibrium and membrane potential in cells. The sodium and potassium move against the concentration gradients. The Na+ K+-ATPase pump maintains the gradient of a higher concentration of sodium extracellularly and a higher level of potassium intracellularly.
Which of the following is ATPase activity?
Myosins are molecular motors possessing ATPase activity. Myosin II (conventional myosin) is the main myosin responsible for contractility of muscles and non-muscle cells. It polymerizes to form filaments, which, together with actin filaments, organize contractile stress fibers or cleavage furrow during cell division.
Which protein has ATPase activity?
myosin proteins
(a) The three major myosin proteins are organized into head, neck, and tail domains, which carry out different functions. The head domain binds actin and has ATPase activity.
What type of protein is ATPase?
integral membrane proteins
1.1 Overall Architecture. The P-type ATPases are a large family of integral membrane proteins that use the energy of ATP hydrolysis to transport cations and lipids across membranes (Bublitz, Morth, & Nissen, 2011; Palmgren & Nissen, 2011).
Where is ATPase found?
* F-ATPases (ATP synthases, F1F0-ATPases), which are found in mitochondria, chloroplasts and bacterial plasma membranes where they are the prime producers of ATP, using the proton gradient generated by oxidative phosphorylation (mitochondria) or photosynthesis (chloroplasts).
What enzyme synthesizes ATP?
ATP is synthesized by the enzyme F1F0-ATP synthase. This enzyme, the smallest-known molecular machine, couples proton translocation through its membrane-embedded, hydrophobic domain, F0, to the synthesis of ATP from adenosine diphosphate (ADP) and inorganic phosphate (Pi) in its soluble, hydrophilic headpiece, F1.
Why is 3 Na and 2 K?
also known as the Na+/K+ pump or Na+/K+-ATPase, this is a protein pump found in the cell membrane of neurons (and other animal cells). It acts to transport sodium and potassium ions across the cell membrane in a ratio of 3 sodium ions out for every 2 potassium ions brought in.
Why is the sodium-potassium pump so important to the human body?
The sodium-potassium pump is a vital enzyme found in all human cells which constantly maintains an optimal ion balance. This uses up a great deal of energy – about a fourth of the body’s energy, the so-called ATP, is used to keep the pump going; in the brain the share is nearly 70%.
Which of the following is correct for muscle contraction?
-The calcium ions end in attractive forces between actin and myosin filaments of muscles that cause contractions. So, the correct answer is ‘Length of A-band remains constant’.
Which is the correct medical definition of ATPase?
Medical Definition of ATPase : an enzyme that hydrolyzes ATP especially : one that hydrolyzes ATP to ADP and inorganic phosphate — called also adenosine triphosphatase
How is ATPase conserved in plants and animals?
ATPase is genetically conserved in animals; therefore, cardenolides which are toxic steroids produced by plants that act on ATPases, make general and effective animal toxins that act dose dependently. Besides exchangers, other categories of transmembrane ATPase include co-transporters and pumps (however, some exchangers are also pumps).
What is the definition of autonomy in philosophy?
Autonomy is an individual’s capacity for self-determination or self-governance. Beyond that, it is a much-contested concept that comes up in a number of different arenas.
How is ATPase used in the sodium pump?
Na+,K+-ATPase an enzyme that spans the plasma membrane and hydrolyzes adenosine triphosphate to provide the energy necessary to drive the cellular sodium pump. Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
