Adenosine Triphosphate Conservation in Biosynthetic Regulation
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چکیده
منابع مشابه
Adenosine triphosphate conservation in biosynthetic regulation. Escherichia coli phosphoribosylpyrophosphate synthase.
The citrate cleavage enzyme (EC 4.1.3.8) of rat liver is inhibited by adenosine diphosphate, which appears to compete with adenosine triphosphate. This effect may ensure that fatty acids are produced only when the ATP level is high. The “energy charge” of the adenylate system, defined as (ATP + 4 ADP)/(AMP + ADP + ATP), is proposed as a fundamental metabolic control parameter. Enzymes that util...
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Factors affecting inhibition of myosin ATPase by ATP, such as concentration of the enzyme, of ATP, and of the divalent metals, calcium and magnesium, have been studied and the results are reported here. Experiments were carried out under conditions in which no known magnesium effects occurred, so that only the effect of calcium on the nucleoside triphosphatase activity of myosin A could be qual...
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The matching of blood flow with metabolic need requires a mechanism for sensing the needs of the tissue and communicating that need to the arterioles, the ultimate controllers of tissue perfusion. Despite significant strides in our understanding of blood flow regulation, the identity of the O(2) sensor has remained elusive. Recently, the red blood cell, the Hb-containing O(2) carrier, has been ...
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The regulation of ATP metabolism by inorganic phosphate (Pi) was examined in five normal volunteers through measurements of ATP degradation during relative Pi depletion and repletion states. Relative Pi depletion was achieved through dietary restriction and phosphate binders, whereas a Pi-repleted state was produced by oral Pi supplementation. ATP was radioactively labeled by the infusion of 18...
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Transport systems involved in uptake and biliary secretion of bile salts have been extensively studied in rat liver; however, little is known about these systems in the human liver. In this study, we investigated taurocholate (TC) transport in canalicular and basolateral plasma membrane vesicles isolated from 15 human livers (donor age 6-64 yr). ATP stimulated the uptake ofTC into both canalicu...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1967
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)95957-0