ACAD10和ACAD11使哺乳动物的4-氧酸脂质代谢成为可能
Edrees H Rashan1, Abigail K Bartlett1,2, Daven B Khana3
1Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, USA.
Nature structural & molecular biology
|June 19, 2025
概括
两种新型酶,ACAD10和ACAD11,对于分解小鼠中的4-氧酸 (4-HAs) 是至关重要的. 这些酶修改4-HA,使它们进入脂肪酸代谢并防止有害的积累.
科学领域:
- 生物化学 生物化学
- 代谢途径 代谢途径
- 酶学 是一种酶学.
背景情况:
- 脂肪酸β-氧化是一种关键的代谢过程.
- 某些脂肪酸,如4-氧酸 (4-HAs),不能通过标准的β-氧化机械加工.
- 4-HAs的催化作用在很大程度上仍然没有被描述.
研究的目的:
- 在哺乳动物中确定负责4-氧酸代谢的酶.
- 阐明4-HAs被用于β-氧化处理的机制.
- 为了研究受损4-HA代谢的生理后果.
主要方法:
- 使用的小鼠模型缺乏ACAD10或ACAD11.
- 采用冷电子显微镜和分子建模来研究酶结构和功能.
- 分析了血代谢物水平和雌性小鼠生理学.
主要成果:
- 确定了ACAD10和ACAD11作为非典型的4-HA代谢必不可少的乙-CoA脱酶.
- 证明ACAD10和ACAD11可化4-基亚-CoAs,从而使它们转化为2-基-CoAs.
- 显示的ACAD10是线粒体 (短链4-HAs) 和ACAD11是过氧体 (长链4-HAs).
- 在小鼠中,ACAD11缺乏导致4-HA的积累,在雌性动物中导致代谢功能障碍.
结论:
- ACAD10和ACAD11是控制哺乳动物4-酸代谢的主要酶.
- 这些酶代表了将4-HAs整合到中心代谢中的新机制.
- 4-HA 代谢失调对健康有重大影响,特别是在女性代谢健康方面.
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