深海CYP51的独特结构特征与高压适应有关
Tatiana Y Hargrove1, David C Lamb2, Zdzislaw Wawrzak3
1Department of Biochemistry, Vanderbilt University School of Medicine, Nashville, TN, 37232, USA.
Research square
|December 23, 2024
概括
深海鱼和人体醇14α-脱甲基酶 (CYP51s) 晶体结构显示出独特的特征. 这些结构洞察力解释了酶的灵活性,催化效率和适应深海环境,超过了人工智能预测.
科学领域:
- 生物化学 生化学
- 结构生物学 结构生物学
- 酶学 是一种酶学.
背景情况:
- 细胞染色体P450 (CYP) 是一个庞大的酶超级家族,具有不同的功能,从合成必需化合物到代谢异生菌.
- 固醇14α-脱甲基酶 (CYP51s) 是固醇生物合成中的关键酶.
- 了解CYP51的结构功能关系对于药物开发和代谢研究至关重要.
研究的目的:
- 为了确定深海鱼 (Coryphaenoides armatus) 和人类醇14α-脱甲基酶 (CYP51s) 的晶体结构.
- 阐明观察到的催化速率,基质选择性和抑制剂抗性的差异的分子基础.
- 研究深海P450酶与它们的环境有关的结构适应.
主要方法:
- 采用X射线晶体学来确定C. armatus CYP51和人类CYP51的高分辨率结构.
- 进行了比较结构分析,以确定两个酶之间的关键差异和相似之处.
- 生物信息工具和人工智能分子建模用于与实验结构进行比较.
主要成果:
- 无论是C. armatus还是人类CYP51结构都表现出形态灵活性,这解释了更快的催化,更低的选择性和抑制剂耐药性.
- 在鱼CYP51中观察到独特的结构特征,包括FG手臂/β4发针定位,与AI预测不同.
- 亚马图斯CYP51的结构是第一个深海P450的特征,突出了膜环境的潜在调节.
结论:
- 确定的结构提供了对CYP51功能和调节的分子理解.
- 在C. armatus CYP51中的结构区别表明与深海膜脂质组成的共同适应.
- 这些发现提供了对酶进化和适应极端环境的见解.
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