1UFJ

Crystal Structure of an Artificial Metalloprotein:Fe(III)(3,3'-Me2-salophen)/apo-A71G Myoglobin

1UFJ の概要

• エントリーDOI: 10.2210/pdb1ufj/pdb
• 分子名称: MYOGLOBIN, FE (III) ION, PHOSPHATE ION, ... (5 entities in total)
• 機能のキーワード: myoglobin, schiff base, iron, salophen, metalloprotein, oxygen storage-transport complex, oxygen storage/transport
• 由来する生物種: Physeter catodon (sperm whale)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 18322.20

構造登録者

Ueno, T.,Ohashi, M.,Kono, M.,Kondo, K.,Suzuki, A.,Yamane, T.,Watanabe, Y. (登録日: 2003-05-30, 公開日: 2004-05-18, 最終更新日: 2023-10-25)

主引用文献

Ueno, T.,Ohashi, M.,Kono, M.,Kondo, K.,Suzuki, A.,Yamane, T.,Watanabe, Y.
Crystal Structures of Artificial Metalloproteins: Tight Binding of Fe(III)(Schiff-Base) by Mutation of Ala71 to Gly in Apo-Myoglobin
Inorg.Chem., 43:2852-2858, 2004

PubMed Abstract: Apo-myoglobin (apo-Mb) and apo-A71GMb were successfully reconstituted with FeIII(salophen) (1) (salophen = N,N'-bis(salicylidene)-1,2-phenilenediamine), Fe(III)(3,3'-Me2-salophen) (2), and FeIII(5,5'-t-Bu2-salophen) (3). The crystal structure of 2.apo-A71GMb shows the tight binding of the complex in the Mb cavity, while in wild-type apo-Mb it is highly disordered due to the steric repulsion with Ala71. Furthermore, the structure of 2.apo-A71GMb suggests a possible accommodation of a small substrate in the cavity. In fact, the cyanide association rate constant of 2.apo-A71GMb is 216-fold larger compared to that of 2.apo-Mb. These results provide us principles for the noncovalent fixation of synthetic metal cofactors at the desired positions in protein matrixes.

PubMed: 15106972
DOI: 10.1021/ic0498539

実験手法

X-RAY DIFFRACTION (1.6 Å)