3BB0

Crystal Structure of a Trapped Phosphate-Intermediate in Vanadium Apochloroperoxidase Catalyzing a Dephosphorylation Reaction

3BB0 の概要

• エントリーDOI: 10.2210/pdb3bb0/pdb
• 関連するPDBエントリー: 1VNC 1VNI 1VNS
• 分子名称: Vanadium chloroperoxidase, PHOSPHITE ION, SULFATE ION, ... (4 entities in total)
• 機能のキーワード: protein phosphate-intermediate complex, phospatase activity, chloride, metal-binding, oxidoreductase, peroxidase, secreted, vanadium
• 由来する生物種: Curvularia inaequalis
• 細胞内の位置: Secreted: P49053
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 67942.62

構造登録者

Messerschmidt, A.,Macedo-Ribeiro, S. (登録日: 2007-11-09, 公開日: 2008-02-12, 最終更新日: 2024-11-20)

主引用文献

Macedo-Ribeiro, S.,Renirie, R.,Wever, R.,Messerschmidt, A.
Crystal structure of a trapped phosphate intermediate in vanadium apochloroperoxidase catalyzing a dephosphorylation reaction
Biochemistry, 47:929-934, 2008

PubMed Abstract: The crystal structure of the apo form of vanadium chloroperoxidase from Curvularia inaequalis reacted with para-nitrophenylphosphate was determined at a resolution of 1.5 A. The aim of this study was to solve structural details of the dephosphorylation reaction catalyzed by this enzyme. Since the chloroperoxidase is functionally and evolutionary related to several acid phosphatases including human glucose-6-phosphatase and a group of membrane-bound lipid phosphatases, the structure sheds light on the details of the dephosphorylation catalyzed by these enzymes as well. The trapped intermediate found is bound to the active site as a metaphosphate anion PO3-, with its phosphorus atom covalently attached to the Nepsilon2 atom of His496. An apical water molecule is within hydrogen-bonding distance to the phosphorus atom of the metaphosphate, and it is in a perfect position for a nucleophilic attack on the metaphosphate-histidine intermediate to form the inorganic phosphate. This is, to our knowledge, the first structural characterization of a real reaction intermediate of the inorganic phosphate group release in a dephosphorylation reaction.

PubMed: 18163651
DOI: 10.1021/bi7018628

実験手法

X-RAY DIFFRACTION (1.5 Å)