酶催化硫标记加速了3-OH类固醇向的亚代谢物选
Wenjing Liu1,2, Wei Chen2,3, Wei Li2,3
1School of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China.
Analytical chemistry
|February 9, 2026
概括
使用人类硫转移酶2A1 (hSULT 2A1) 的酶衍生提供了对3-OH类固醇的选择性硫标记. 这种方法增强了在代谢学中的亚代谢组 (submetabolome) 分析和疾病生物标志物发现.
科学领域:
- 生物化学 生物化学
- 代谢学 代谢学 代谢学
- 酶学 是一种酶学.
背景情况:
- 代谢学通常依赖于衍生,但有限的选择性限制了它的应用.
- 酶衍生物化为代谢物分析提供了一个高度选择性的替代方案.
- 3-OH类固醇是关键的胆固醇代谢物和疾病生物标志物.
研究的目的:
- 为了研究人类硫转移酶2A1 (hSULT 2A1) 对于选择性酶导制3-OH类固醇的有用性.
- 建立一种针对3-OH类固醇的向性亚代谢组概况的方法.
- 探索这种方法在分析复杂的生物样本中的应用.
主要方法:
- 用hSULT 2A1.1.进行53种真实类固醇的酶硫化.
- 由此产生的类固醇硫酸盐的质谱分析,包括碎片化模式和诊断离子.
- 分子对接以确认选择性3-OH硫化.
- 在*Bufonis Venenum* (BV) 的亚代谢组分析中使用hSULT 2A1介导硫化.
主要成果:
- hSULT 2A1对3-OH硫化表现出高选择性 (>80%的转化率).
- 类固醇硫酸盐产生了特有的碎片离子 (SO3-•,SO4-) 和信号 ([34S - M - H]-).
- 最佳碰撞能量与[M - H]-质量线性相关,硫酸盐显示出更好的灵敏度.
- 在*Bufonis Venenum*中鉴定和量化了60个类固醇3-硫酸盐,显示出大量的批量变化.
结论:
- hSULT 2A1介导硫化是一种高度选择性和有效的方法,用于在代谢学中准3-OH类固醇.
- 这种酶方法使得精确的亚代谢组分析和定量分析成为可能.
- 这些发现为先进的代谢学研究提供了对酶催化衍生物的新见解.
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