3AWM

Cytochrome P450SP alpha (CYP152B1) wild-type with palmitic acid

3AWM の概要

• エントリーDOI: 10.2210/pdb3awm/pdb
• 関連するPDBエントリー: 3AWP 3AWQ
• 分子名称: Fatty acid alpha-hydroxylase, PROTOPORPHYRIN IX CONTAINING FE, PALMITIC ACID, ... (5 entities in total)
• 機能のキーワード: cytochrome p450, peroxygenase, oxidoreductase
• 由来する生物種: Sphingomonas paucimobilis
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 47541.07

構造登録者

Fujishiro, T.,Shoji, O.,Nagano, S.,Sugimoto, H.,Shiro, Y.,Watanabe, Y. (登録日: 2011-03-25, 公開日: 2011-06-29, 最終更新日: 2024-03-13)

主引用文献

Fujishiro, T.,Shoji, O.,Nagano, S.,Sugimoto, H.,Shiro, Y.,Watanabe, Y.
Crystal structure of H2O2-dependent cytochrome P450SPalpha with its bound fatty acid substrate: insight into the regioselective hydroxylation of fatty acids at the alpha position
J.Biol.Chem., 286:29941-29950, 2011

PubMed Abstract: Cytochrome P450(SPα) (CYP152B1) isolated from Sphingomonas paucimobilis is the first P450 to be classified as a H(2)O(2)-dependent P450. P450(SPα) hydroxylates fatty acids with high α-regioselectivity. Herein we report the crystal structure of P450(SPα) with palmitic acid as a substrate at a resolution of 1.65 Å. The structure revealed that the C(α) of the bound palmitic acid in one of the alternative conformations is 4.5 Å from the heme iron. This conformation explains the highly selective α-hydroxylation of fatty acid observed in P450(SPα). Mutations at the active site and the F-G loop of P450(SPα) did not impair its regioselectivity. The crystal structures of mutants (L78F and F288G) revealed that the location of the bound palmitic acid was essentially the same as that in the WT, although amino acids at the active site were replaced with the corresponding amino acids of cytochrome P450(BSβ) (CYP152A1), which shows β-regioselectivity. This implies that the high regioselectivity of P450(SPα) is caused by the orientation of the hydrophobic channel, which is more perpendicular to the heme plane than that of P450(BSβ).

PubMed: 21719702
DOI: 10.1074/jbc.M111.245225

実験手法

X-RAY DIFFRACTION (1.65 Å)