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Adenylate kinase
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・ Adenylylation
・ Adenylylsulfatase
・ Adenylylsulfate—ammonia adenylyltransferase
・ Adenylyltransferase and sulfurtransferase MOCS3


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Adenylate kinase : ウィキペディア英語版
Adenylate kinase

Adenylate kinase () (also known as ADK or myokinase) is a phosphotransferase enzyme that catalyzes the interconversion of adenine nucleotides, and plays an important role in cellular energy homeostasis.
==Substrate and products==
The reaction catalyzed is:
ATP + AMP ⇔ 2 ADP
The equilibrium constant varies with condition, but is close to 1.〔The NIST Thermodynamics of Enzyme-Catalyzed Reactions database, http://xpdb.nist.gov/enzyme_thermodynamics/enzyme1.pl, , gives equilibrium constants, search for adenylate kinase under enzymes〕 Thus, the ΔGo for this reaction is close to zero. In muscle of a variety of species of vertebrates and invertebrates, the concentration of ATP is typically 7-10 times that of ADP, and usually greater than 100 times that of AMP. The rate of oxidative phosphorylation is controlled by the availability of ADP. Thus, the mitochondrion attempts to keep ATP levels high due to the combined action of adenylate kinase and the controls on oxidative phosphorylation.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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