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公司名称: Beckman Coulter
产品编号: 566353
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Determination of the H+-ATP Synthase and Hydrolytic Activities
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Date:
2016-08-20
[Abstract]  The H+-ATP synthase of the inner mitochondrial membrane utilizes the proton gradient generated by the respiratory chain to synthesize ATP. Under depolarizing conditions, it can function in reverse by hydrolyzing ATP to generate a proton gradient. The protocols presented here allow the facile determination of both the synthetic and hydrolytic activities of the H+-ATP synthase in isolated mitochondria and in permeabilized mammalian cells. Since the protocol requires the isolation of polarized and well-coupled mitochondria, first we describe the protocol for mitochondrial ... [摘要]  内线粒体膜的H sup + -ATP合酶利用呼吸链产生的质子梯度来合成ATP。 在去极化条件下,它可以通过水解ATP产生质子梯度而反向作用。 本文提供的方案允许容易地测定分离的线粒体和透化的哺乳动物细胞中H sup + -ATP合酶的合成和水解活性。 由于该协议需要极化和良好耦合的线粒体的分离,首先我们描述线粒体从小鼠组织分离的协议。 第二,我们描述了用于测量ATP合成活性作为终点和在分离的线粒体和透化细胞中的动力学模式的方案。 最后,我们描述了用于测定酶在分离的线粒体中的ATP水解活性的方案。

Assay of the Carboxylase Activity of Rubisco from Chlamydomonas reinhardtii
Author:
Date:
2015-12-05
[Abstract]  The performance of the carbon-fixing enzyme, ribulose 1, 5-bisphosphate carboxylase/oxygenase (EC 4.1.1.39, Rubisco), controls biomass accumulation in green plants, algae and most autotrophic bacteria. In particular, the carboxylase activity of Rubisco incorporates carbon from CO2 to ribulose 1, 5-bisphosphate (RuBP) producing two molecules of 3-phosphoglycerate. Here a detailed protocol is given for the assay of the carboxylase activity of Rubisco from Chlamydomonas reinhardtii, a model organism for chloroplast studies and a fitting host for biotechnologically oriented ... [摘要]  碳固定酶,核酮糖1,5-二磷酸羧化酶/加氧酶(EC 4.1.1.39,Rubisco)的性能控制绿色植物,藻类和大多数自养细菌中的生物量积累。特别地,Rubisco的羧化酶活性掺入来自CO 2的碳到产生两分子3-磷酸甘油酸的核酮糖1,5-二磷酸(RuBP)。这里给出了用于来自莱茵衣藻的Rubisco的羧化酶活性的测定的详细方案,其是用于叶绿体研究的模式生物体和用于生物技术定向的酶的遗传操作的拟合宿主。 Rubisco必须与Mg 2+离子和碳酸氢盐预孵育以诱导催化活性中心(Laing和Christeller,1976)。一旦Rubisco被活化,本文所述的其羧化酶活性的测定基于将14 C-二氧化碳/碳酸氢盐固定在耐酸放射性中(Lorimer等人, ,1977)。虽然也可以使用分光光度测定法(Lilley和Walker,1974),但是当处理大量样品时,基于放射性底物固定的方法是不可替代的,并且它仍然是最常用于测定Rubisco活性的技术。

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