Liver acetyl CoA carboxylase: insight into the mechanism of activation by tricarboxylic acids and acetyl CoA.
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Liver acetyl CoA carboxylase: insight into the mechanism of activation by tricarboxylic acids and acetyl CoA.
Recent investigations in this laboratory have shownl 2 that the isocitrate(or citrate-) activated form of liver acetyl CoA carboxylase (E.C. 6.4.1.2) is a large protein structure having a molecular weight of about four million. Electron microscopic examination of the carboxylase in the presence of isocitrate reveals' that it has a filamentous structure with dimensions of SG-100 A by up to 5000 ...
متن کاملRegulation of acetyl-coA carboxylase: properties of coA activation of acetyl-coA carboxylase.
Acetyl-CoA carboxylase [acetyl-CoA:carbon-dioxide ligase (ADP-forming), EC 6.4.1.2] is activated by physiological concentrations of CoA. The CoA concentration dependency of this activation is sigmoidal; below 60 microM there is little or no activation, but the activation observed between 60 and 120 microM indicates that small changes in the concentration of CoA can cause significant changes in ...
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medium containing [” Plphosphate, the distribution of 32P-labelled acetyl-CoA carboxylase in the fractions can be investigated and it has been found that a greater proportion of the phosphorylated enzyme is present in the polymeric form after exposure of the intact tissue to insulin. Present studies are concerned with investigating whether this polymeric active form is phosphorylated to a great...
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Acetyl-CoA carboxylase in rat liver homogenates was activated in vitro in a time- and temperature-dependent manner. The activity of acetyl-CoA carboxylase in rat liver preparations was determined in a 1-min assay to preclude the possibility of citrate activation of the enzyme during the assay period. Activation of the enzyme occurred more rapidly in liver preparations continuously maintained at...
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23 Holloway, P. J., Wong, W. W. C., Partridge, H. J., Seaman, D. and Perry, R. B. (1992) Pestic. Sci. 34, 109-118 24 Silcox, D. and Holloway, P. J. (1989) in Adjuvants and Agrochemicals (Chow, P. N. P., Grant, C. A,, Hinshalwood, A. M. and Simundsson, E., eds.), pp. 115-128, CRC Press Inc., Boca Raton, FL 25 Coret, J., Garnbonnet, B., Brabet, F. and Charnel, A. R. (1993) Pestic. Sci. 38, 201-20...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1967
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.57.5.1455