定量蛋白质组学将NCOA4确定为载荷受体,可以调解铁类食
Joseph D Mancias1, Xiaoxu Wang2, Steven P Gygi3
11] Division of Genomic Stability and DNA Repair, Department of Radiation Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts 02215, USA [2] Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA [3] Harvard Radiation Oncology Program, Boston, Massachusetts 02115, USA [4] Department of Radiation Oncology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, USA.
研究人员发现,核受体协活性剂4 (NCOA4) 作为一种特定类型的自性菌的选择性受体. 这一过程对于调节细胞内的铁含量至关重要.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 自对细胞健康至关重要,通过自和溶酶体降解受损的组件.
- 选择性自针对特定的货物,但许多货物类型的机制仍然不清楚.
- 了解选择性自对于癌症和神经退行等疾病至关重要.
研究的目的:
- 使用定量蛋白质组学识别参与选择性自的新型蛋白质和载荷受体.
- 为了研究核受体协活性剂4 (NCOA4) 在自体载荷识别中的作用.
- 阐明铁素通过自性降解的机制及其对铁的稳态的影响.
主要方法:
- 定量蛋白质组学用于识别人类细胞自细胞中丰富的蛋白质.
- 同免疫沉用于识别与NCOA4和ATG8蛋白相关的蛋白质.
- 细胞测试以评估NCOA4缺乏细胞中的费里丁降解和细胞内铁水平.
主要成果:
- 确定了NCOA4作为一种与ATG8.8相关的新型自细胞丰富蛋白质.
- NCOA4特别与费里 (重链和轻链) 结合,调解其自降解 (费里丁).
- 缺乏NCOA4会影响费里的降解,导致细胞内生物可用铁的减少.
结论:
- NCOA4作为ferritinophagy的选择性载荷受体起作用,ferritinophagy是铁恒常的一个关键途径.
- 这项研究为了解选择性自中货物受体相互作用提供了资源.
- 这些发现突出了通过自调节细胞铁代谢的新机制.
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