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丙二酰辅酶A对大鼠肝脏和脂肪细胞线粒体中显性和潜在肉碱酰基转移酶活性的影响。

The effect of malonyl-CoA on overt and latent carnitine acyltransferase activities in rat liver and adipocyte mitochondria.

作者信息

Saggerson E D, Carpenter C A

出版信息

Biochem J. 1983 Feb 15;210(2):591-7. doi: 10.1042/bj2100591.

Abstract
  1. Carnitine palmitoyltransferase and carnitine octanoyltransferase activities were measured in mitochondria at various acyl-CoA concentrations before and after sonication, thus permitting assessment of both overt and latent activities. 2. Overt carnitine palmitoyltransferase in liver and adipocyte mitochondria and overt carnitine octanoyltransferase in liver mitochondria were inhibited by malonyl-CoA. None of the latent activities were affected by this metabolite. 3. 5,5'-Dithiobis-(2-nitrobenzoic acid) stimulated latent hepatic carnitine palmitoyltransferase at low [palmitoyl-CoA]. 4. Starvation (24 h) decreased overt carnitine palmitoyltransferase activity in adipocyte mitochondria, but did not alter the sensitivity of this activity to malonyl-CoA.
摘要
  1. 在超声处理前后,于不同酰基辅酶A浓度下测定线粒体中的肉碱棕榈酰转移酶和肉碱辛酰转移酶活性,从而能够评估显性和潜在活性。2. 丙二酸单酰辅酶A抑制肝脏和脂肪细胞线粒体中的显性肉碱棕榈酰转移酶以及肝脏线粒体中的显性肉碱辛酰转移酶。该代谢产物对任何潜在活性均无影响。3. 在低[棕榈酰辅酶A]浓度下,5,5'-二硫代双-(2-硝基苯甲酸)刺激肝脏潜在肉碱棕榈酰转移酶。4. 饥饿(24小时)降低脂肪细胞线粒体中显性肉碱棕榈酰转移酶活性,但不改变该活性对丙二酸单酰辅酶A的敏感性。

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