1Q4G

2.0 Angstrom Crystal Structure of Ovine Prostaglandin H2 Synthase-1, in complex with alpha-methyl-4-biphenylacetic acid

1Q4G の概要

• エントリーDOI: 10.2210/pdb1q4g/pdb
• 関連するPDBエントリー: 1CQE 1EQG 1EQH 1HT5 1HT8 1PRH
• 分子名称: Prostaglandin G/H synthase 1, 2-acetamido-2-deoxy-alpha-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, beta-D-mannopyranose-(1-6)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, ... (10 entities in total)
• 機能のキーワード: cyclooxygenase, non-steroidal anti-inflammatory drug, peroxidase, prostaglandin synthase, egf-like domain, membrane binding domain, oxidoreductase
• 由来する生物種: Ovis aries (sheep)
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 136101.03

構造登録者

Gupta, K.,Selinksy, B.S.,Kaub, C.J.,Katz, A.K.,Loll, P.J. (登録日: 2003-08-03, 公開日: 2004-01-06, 最終更新日: 2024-11-13)

主引用文献

Gupta, K.,Selinsky, B.S.,Kaub, C.J.,Katz, A.K.,Loll, P.J.
The 2.0A Resolution Crystal Structure of Prostaglandin H(2) Synthase-1: Structural Insights into an Unusual Peroxidase
J.Mol.Biol., 335:503-518, 2004

PubMed Abstract: Prostaglandin H2 synthase (EC 1.14.99.1) is an integral membrane enzyme containing a cyclooxygenase site, which is the target for the non-steroidal anti-inflammatory drugs, and a spatially distinct peroxidase site. Previous crystallographic studies of this clinically important drug target have been hindered by low resolution. We present here the 2.0 A resolution X-ray crystal structure of ovine prostaglandin H2 synthase-1 in complex with alpha-methyl-4-biphenylacetic acid, a defluorinated analog of the non-steroidal anti-inflammatory drug flurbiprofen. Detergent molecules are seen to bind to the protein's membrane-binding domain, and their positions suggest the depth to which this domain is likely to penetrate into the lipid bilayer. The relation of the enzyme's proximal heme ligand His388 to the heme iron is atypical for a peroxidase; the iron-histidine bond is unusually long and a substantial tilt angle is observed between the heme and imidazole planes. A molecule of glycerol, used as a cryoprotectant during diffraction experiments, is seen to bind in the peroxidase site, offering the first view of any ligand in this active site. Insights gained from glycerol binding may prove useful in the design of a peroxidase-specific ligand.

PubMed: 14672659
DOI: 10.1016/j.jmb.2003.10.073

実験手法

X-RAY DIFFRACTION (2 Å)