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Author:
Date:
2020-03-05
[Abstract] Superoxide dismutases (SODs) act as a primary defence against reactive oxygen species (ROS) by converting superoxide anion radicals (O2-) into molecular oxygen (O2) and hydrogen peroxide (H2O2). Members of this enzyme family include CuZnSODs, MnSODs, FeSODs, and NiSODs, depending on the nature of the cofactor that is required for proper activity. Most eukaryotes, including yeast, possess CuZnSOD and MnSOD. This protocol aims at assessing the activity of the yeast Saccharomyces cerevisiae MnSOD Sod2p from cellular extracts using nitroblue tetrazolium staining. This method can be used to estimate the cellular bioavailability of Mn2+ as well as to evaluate the redox state of the cell.
[摘要] [摘要 ] 超氧化物歧化酶（SOD能）充当主防御针对反应性氧物质（ROS）通过转换的超氧阴离子自由基（O 2 - ）为分子氧（O 2 ）和过氧化氢（H 2 ? 2 ）。这种酶的家庭成员包括CuZnSODs ，MnSODs ，FeSODs 和NiSODs ，这取决于是需要适当的活动辅助因子的性质。大多数真核生物，包括酵母，都具有CuZnSOD 和MnSOD 。该协议旨在评估酵母的活性 使用硝基蓝四唑染色法从细胞提取物中提取酿酒酵母MnSOD Sod2p 。该方法可用于估计Mn 2+ 的细胞生物利用度以及评估细胞的氧化还原状态。
[背景 ] 的SODs被定义为减少正常有氧代谢为氧气和过氧化氢期间形成的氧的有害自由基含金属的抗氧化剂酶。：这些酶是基于需要作为辅因子进行适当的酶活性的金属分类CuZnSODs ，MnSODs ，FeSODs ，和NiSODs 。在酿酒酵母中，有两个S OD ：CuZn-Sod1p和Mn-Sod2p（Abreu和Cabelli ...
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