通过一种暂时的蛋白质-蛋白质相互作用来减少 [2Fe-2S]-MitoNEET
Francesca Camponeschi1,2, Simone Ciofi-Baffoni1,2, Lucia Banci1,2
1Magnetic Resonance Center (CERM), University of Florence , Via Luigi Sacconi 6, 50019 Sesto Fiorentino, Florence, Italy.
Journal of the American Chemical Society
|June 27, 2017
概括
人类mitoNEET蛋白修复细胞中的铁-硫 (Fe/S) 集群. 这项研究揭示了细胞质铁硫蛋白组合 (CIA) 机制,特别是Ndor1/anamorsin,在氧化应激后减少了 mitoNEET ,将CIA 与 mitoNEET 修复联系起来.
科学领域:
- 生物化学
- 细胞生物学
- 分子生物学
背景情况:
- 位于外层线粒体膜上的人类线粒体内 (mitoNEET) 在修复铁-硫 (Fe/S) 集群中起作用.
- mitoNEET参与细胞铁调节蛋白1 (IRP1) 的Fe/ S聚合修复,这对细胞铁平衡至关重要.
- Fe/S 聚合物修复机制涉及 mitoNEET 中的氧化还原开关,在减少的无活性和氧化的活性状态之间进行过渡.
研究的目的:
- 确定氧化应激后负责减少mitoNEET Fe/S集群的系统.
- 研究 mitoNEET 和 Ndor1/anamorsin 复合体之间的电子转移过程.
主要方法:
- 紫外线光谱
- 核磁共振光谱学
- 在体外生化测试
主要成果:
- Ndor1/anamorsin复合物直接与 mitoNEET 相互作用,减少其 [2Fe-2S] .
- 形成一个短暂的复合体,促进从anamorsin的 [2Fe-2S] 集群到 mitoNEET 的电子转移.
- 这为细胞溶体铁硫蛋白组合 (CIA) 机制与 mitoNEET 修复之间的联系提供了体外证据.
结论:
- 在氧化应激后,Ndor1/anamorsin复合体是恢复 mitoNEET 功能的一个关键因素.
- 这种互动建立了CIA机器和mitoNEET Fe/S集群修复路径之间的直接联系.
- 这种途径可能对细胞和核Fe/S蛋白的有效成熟至关重要.
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