Saccharomyces cerevisiae NRE1和IRC24编码类似的基氧降解酶
Brandon Garcia1, Kasandra J Riley2
1Rollins College, Winter Park, Florida, United States.
microPublication biology
|August 21, 2023
概括
研究人员确定了Nre1p,它是Saccharomyces cerevisiae中的Irc24p的一种类型. 这两种蛋白质都是氧降解酶,其中Nre1pp是氧降解酶.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 酵母遗传学 酵母遗传学
背景情况:
- Irc24p是Saccharomyces cerevisiae中已知的一种基氧降解酶.
- 在染色体IX上发现了一种假定对应物Nre1p,它位于Irc24p的下游.
- 这两种蛋白质都具有重要的序列特征和结构特征,表明它们具有相关的功能.
研究的目的:
- 描述新发现的Nre1p. 的生物化学功能.
- 为了比较Nre1p的酶活性与它的同类物,Irc24p.
- 为了确认对这些氧降解酶的辅因子偏好.
主要方法:
- 对Irc24p和Nre1p氨基酸序列的生物信息分析 (PANTHER,PFAM).
- 结构对齐以预测保存的活跃地点和罗斯曼.
- 净化六西丁标记的Irc24p和Nre1p.
- 在体外酶分析测量基还原动力学.
主要成果:
- 两种Irc24p和Nre1p都经过净化,并被证实为氧降解酶.
- 对于减少的两种蛋白质,观察到类似的催化动力学.
- 对于这两种酶来说,NADPH作为辅助因子的偏好得到了证明.
结论:
- 从功能上来说,Nre1p是基氧降解酶的特征,首次显示出体外活性.
- 在Saccharomyces cerevisiae中,Irc24p和Nre1p代表了一对相关的氧降解酶,具有相似的生化特性.
- 这些发现提供了关于酵母中的氧化还原酶的功能冗余和演变的见解.
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