A Minimal Functional Complex of Cytochrome P450 and FBD of Cytochrome P450 Reductase in Nanodiscs.

A Minimal Functional Complex of Cytochrome P450 and FBD of Cytochrome P450 Reductase in Nanodiscs.
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DOI:
10.1002/anie.201802210
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发表时间:
2018-07-09
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
通讯作者:
Ramamoorthy A
Ramamoorthy A
中科院分区:
其他
文献类型:
--
作者:
Prade E;Mahajan M;Im SC;Zhang M;Gentry KA;Anantharamaiah GM;Waskell L;Ramamoorthy A

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使电子从细胞色素P450还原酶(CPR)转移到细胞色素P450(CYP 450)的结构相互作用是其催化机制的重要先决条件。在这里,我们报告的第一个结构模型的膜结合的功能复合物,以揭示全长CYP 450和CPR的最小域之间的相互作用。我们的研究结果表明,锚定的蛋白质在脂质双层是一个最低限度的要求CYP 450催化功能。与细胞色素-b5(cyt-b5)类似,发现CYP 450的C-螺旋上的Arg 125对于有效的电子转移是重要的,从而支持CYP 450的氧化还原伙伴的竞争行为。我们报告了一种研究蛋白质-蛋白质相互作用的一般方法,结合使用纳米盘与NMR光谱和SAXS。将结构细节与机制联系起来将有助于揭示不同微粒体CYP 450在其天然环境中的异生物质代谢,并促进新药实体的设计。布局1:解决细胞色素P450(CYP 450)复合物与其氧化还原伙伴的结构是一个重要的先决条件,在电子转移的选择性途径凝视。在这里,我们报告的CYP 450-氧化还原伴侣复合物锚定在脂质膜的功能(电子转移)的最低要求的结构相互作用。这项研究带来了一个范式转变,以解开药物/异生物质代谢的不同微粒体CYP在其天然膜环境。
Structural interactions that enable electron transfer to cytochrome-P450 (CYP450) from its redox partner CYP450-reductase (CPR) are a vital prerequisite for its catalytic mechanism. Here, we report the first structural model for the membrane-bound functional complex to reveal interactions between the full-length CYP450 and a minimal domain of CPR. Our results suggest that anchorage of the proteins in a lipid bilayer is a minimal requirement for CYP450 catalytic function. Akin to cytochrome-b5 (cyt-b5), Arg125 on the C-helix of CYP450s is found to be important for effective electron transfer, thus supporting the competitive behavior of redox partners for CYP450s. We report a general approach to study protein-protein interactions combining the use of nanodiscs with NMR spectroscopy and SAXS. Linking structural details to the mechanism will help unravel the xenobiotic metabolism of diverse microsomal CYP450s in their native environment and facilitate the design of new drug entities. Layout 1: Solving a structure of the cytochrome P450 (CYP450) complex with its redox partner is a vital prerequisite to gaze at the selective route of electron transfer. Here we report structural interactions of CYP450-redox partner complex anchored in lipid membrane as a minimal requirement for functionality (electron transfer). This study brings about a paradigm shift to unravel the drug/xenobiotic metabolism by diverse microsomal CYPs in their native membrane environment.
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