...
首页> 外文期刊>Biochemistry >Interaction of Ceruloplasmin and 5-Lipoxygenase
【24h】

Interaction of Ceruloplasmin and 5-Lipoxygenase

机译:铜蓝蛋白和5-脂氧合酶的相互作用

获取原文
获取原文并翻译 | 示例
           

摘要

The interaction between ceruloplasmin (CP), the multicopper oxidase of human plasma, and 5-lipoxygenase (5-LO), the key enzyme of leukotriene synthesis, is shown for the first time. By Western-blotting and mass spectrometry of tryptic fragments, it is shown that 5-LO from protein extract of human leukocytes binds with immobilized CR Dose-dependent influence of intact CP on leukotrienes synthesis is found: CP reduced leukotrienes synthesis in leukocytes in a dose above 50 μg/ml (normal CP concentration in plasma is about 300-400 μg/ml). Proteolyzed CP and apo-form of CP is unable to inhibit activity of 5-LO. CP increased activity of 5-LO at low doses (5-10 μg/ml). On the whole, the influence of CP on phagocytosis index of leukocytes coordinates with influence on activity of 5-LO: the index increased in the range of 2-10 μg/ml CP and decreased at doses of CP above 40 μg/ml. The dual role of CP in regulation of cellular response of leukocytes is discussed.
机译:首次显示了血浆铜蓝蛋白(CP)和人血浆中的多铜氧化酶与白三烯合成的关键酶5-脂氧合酶(5-LO)之间的相互作用。通过蛋白质印迹和胰蛋白酶消化片段的质谱分析,表明人白细胞蛋白质提取物的5-LO与固定化的CR结合发现完整CP对白三烯合成的剂量依赖性影响:CP降低了一定剂量的白细胞中白三烯合成高于50μg/ ml(血浆中正常CP浓度约为300-400μg/ ml)。蛋白水解的CP和脱辅基的CP不能抑制5-LO的活性。 CP在低剂量(5-10μg/ ml)下增加了5-LO的活性。总体而言,CP对白细胞吞噬作用指数的影响与对5-LO活性的影响相协调:该指数在2-10μg/ ml CP范围内增加,而在40μg/ ml以上CP剂量下降低。讨论了CP在调节白细胞细胞反应中的双重作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号