9D13

Tt Pah2 D148N delta helix apo

9D13 の概要

• エントリーDOI: 10.2210/pdb9d13/pdb
• 関連するPDBエントリー: 7LHK
• 分子名称: Nuclear elongation and deformation protein, GLYCEROL (3 entities in total)
• 機能のキーワード: lipin pah phosphatidic acid phosphatase, lipid phosphatase, hydrolase
• 由来する生物種: Tetrahymena thermophila
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 34571.71

構造登録者

Vitkovska, T.,Khayyo, V.I.,Airola, M.V. (登録日: 2024-08-07, 公開日: 2025-11-12, 最終更新日: 2025-11-19)

主引用文献

Vitkovska, T.,Welcome, F.S.,Khayyo, V.I.,Gao, S.,Wymore, T.,Airola, M.V.
Structures of a lipin/Pah phosphatidic acid phosphatase in distinct catalytic states reveal a signature motif for substrate recognition.
J.Biol.Chem., 301:110830-110830, 2025

PubMed Abstract: Lipin/Pah phosphatidic acid phosphatases (PAPs) are Mg-dependent enzymes that catalyze the dephosphorylation of phosphatidic acid (PA) to produce diacylglycerol. Deficiency of lipin PAP activity in humans results in inflammatory disorders such as rhabdomyolysis and Majeed syndrome. Previously, we reported the first PAP enzyme structures of Tetrahymena thermophila Pah2 at 3.0 Å resolution. Here, we present five new higher resolution (1.95-2.40 Å) structures of Tetrahymena thermophila Pah2 that represent active states of catalysis, including the product analog tungstate bound to the active site, and an inactive state with a distorted active site. The structures, in conjunction with flexible docking simulations and biochemical analysis, connect two highly conserved aspartate and arginine residues in magnesium coordination and recognition of the substrate PA. Overall, this provides a structural basis for catalysis and defines a signature Asp-Arg motif in lipin/Pah PAPs that enables recognition of their lipid substrate PA, providing insight into how the haloacid dehalogenase domain of lipin/Pah PAPs evolved to act on a membrane embedded substrate.

PubMed: 41109341
DOI: 10.1016/j.jbc.2025.110830

実験手法

X-RAY DIFFRACTION (1.98 Å)