2P0M

Revised structure of rabbit reticulocyte 15S-lipoxygenase

2P0M の概要

• エントリーDOI: 10.2210/pdb2p0m/pdb
• 分子名称: Arachidonate 15-lipoxygenase, FE (II) ION, (2E)-3-(2-OCT-1-YN-1-YLPHENYL)ACRYLIC ACID, ... (4 entities in total)
• 機能のキーワード: rabbit, 15s-lipoxygenase, twin, pseudo symmetry, conformational change, arachidonate, iron, oxidoreductase
• 由来する生物種: Oryctolagus cuniculus (rabbit)
• 細胞内の位置: Cytoplasm: P12530
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 150891.28

構造登録者

Choi, J.,Chon, J.K.,Kim, S.,Shin, W. (登録日: 2007-02-28, 公開日: 2007-10-09, 最終更新日: 2024-03-13)

主引用文献

Choi, J.,Chon, J.K.,Kim, S.,Shin, W.
Conformational flexibility in mammalian 15S-lipoxygenase: Reinterpretation of the crystallographic data.
Proteins, 70:1023-1032, 2008

PubMed Abstract: Lipoxygenases (LOXs) are a family of nonheme iron dioxygenases that catalyze the regioselective and stereospecific hydroperoxidation of polyunsaturated fatty acids, and are involved in a variety of inflammatory diseases and cancers. The crystal structure of rabbit 15S-LOX1 that was reported by Gillmor et al. in 1997 has played key roles for understanding the properties of mammalian LOXs. In this structure, three segments, including 12 residues in the superficial alpha2 helix, are absent and have usually been described as "disordered." By reinterpreting the original crystallographic data we were able to elucidate two different conformations of the molecule, both having well ordered alpha2 helices. Surprisingly, one molecule contained an inhibitor and the other did not, thereby adopting a closed and an open form, respectively. They differed in the conformation of the segments that were absent in the original structure, which is highlighted by a 12 A movement of alpha2. Consequently, they showed a difference in the size and shape of the substrate-binding cavity. The new model should provide new insight into the catalytic mechanism involving induced conformational change of the binding pocket. It may also be helpful for the structure-based design of LOX inhibitors.

PubMed: 17847087
DOI: 10.1002/prot.21590

実験手法

X-RAY DIFFRACTION (2.4 Å)