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哺乳动物中的NOX家族NADPH氧化酶:进化保护和同位体定义序列
Bahareh Nazari1, Vincent Jaquet2, Karl-Heinz Krause1
1Department of Pathology & Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland.
Redox biology
|August 18, 2023
概括
这项研究分析了164种哺乳动物中NADPH氧化酶 (NOX) 酶的进化保存情况. 关键的NOX异型表现出广泛的保护,但NOX1和NOX5在某些哺乳动物群体中显著缺席,这表明它们具有不同的进化重要性.
科学领域:
- 进化生物学 进化生物学
- 基因组学就是基因组学.
- 生物化学 生物化学
背景情况:
- NADPH氧化酶 (NOX) 是关键的超氧化物产生酶,参与宿主防御,生物合成和细胞信号传递.
- 人类拥有七种NOX异型 (NOX1-5,DUOX1,2),而其他哺乳动物可能在其NOX基因家族中存在变异.
- 在各种哺乳动物物种中,特定的NOX异型及其子单元的进化保护和存在仍然在很大程度上没有特征.
研究的目的:
- 在哺乳动物进化过程中研究NADPH氧化酶 (NOX) 基因家族的进化保存.
- 在164种哺乳动物中确定各种NOX异型及其子单元的存在和缺失模式.
- 分析NOX异型体内的氨基酸序列保护,以了解功能域进化.
主要方法:
- 采用了in-silico方法,分析了来自164种哺乳动物的完整基因组序列.
- 基因存在/不存在的评估是使用NCBI的ortologs数据库进行的,其次是手动选.
- 通过多重序列对齐和高度保护区域的识别来评估保护.
主要成果:
- 在分析的哺乳动物基因组中,NOX2,NOX3,NOX4,DUOX1和DUOX2基因在很大程度上保留了.
- 对于动物,形动物和蝙蝠的NOX5,以及对Afrotheria,Monotremata和一些蝙蝠的NOX1的显著缺失.
- 在Afrotheria和大多数Eulipotyphla物种中没有NOXA1;氨基酸序列分析显示保存域,NOX5显示保存较少,NOX2有一个小的保存区域.
结论:
- 这项研究提供了对哺乳动物中NOX异构体的不同进化实质性的见解.
- 鉴定出异形特异性保存域表明了不同的进化轨迹和功能专业化.
- 这些发现强调了进化分析对于理解像NOX.这样的酶家族的功能作用和保护的重要性.
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