Quantitative assays to measure the transport activity of the mitochondrial calcium uniporter in cell lines or Xenopus oocytes.

Quantitative assays to measure the transport activity of the mitochondrial calcium uniporter in cell lines or Xenopus oocytes.
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DOI:
10.1016/j.xpro.2021.100979
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发表时间:
2021-12-17
期刊:
影响因子:
--
通讯作者:
Tsai MF
Tsai MF
中科院分区:
其他
文献类型:
--
作者:
Rodriguez MX;Van Keuren AM;Tsai MF

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The mitochondrial calcium uniporter, which mediates mitochondrial Ca2+ uptake, regulates key cellular functions, including intracellular Ca2+ signaling, cell-fate determination, and mitochondrial bioenergetics. Here, we describe two complementary strategies to quantify the uniporter’s transport activity. First, we detail a mitochondrial Ca2+ radionuclide uptake assay in cultured cell lines. Second, we describe electrophysiological recordings of the uniporter expressed in Xenopus oocytes. These approaches enable a detailed kinetic analysis of the uniporter to link its molecular properties to physiological functions. For complete details on the use and execution of this protocol, please refer to and. Two quantitative approaches to analyze mitochondrial calcium uptake Measuring mitochondrial calcium uptake in cell lines using calcium-45 radioisotope Electrical recordings of the mitochondrial calcium uniporter in Xenopus oocytes The mitochondrial calcium uniporter, which mediates mitochondrial Ca2+ uptake, regulates key cellular functions, including intracellular Ca2+ signaling, cell-fate determination, and mitochondrial bioenergetics. Here, we describe two complementary strategies to quantify the uniporter’s transport activity. First, we detail a mitochondrial Ca2+ radionuclide uptake assay in cultured cell lines. Second, we describe electrophysiological recordings of the uniporter expressed in Xenopus oocytes. These approaches enable a detailed kinetic analysis of the uniporter to link its molecular properties to physiological functions.
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