2X3Y

Crystal structure of GmhA from Burkholderia pseudomallei

2X3Y の概要

• エントリーDOI: 10.2210/pdb2x3y/pdb
• 関連するPDBエントリー: 2X3Z
• 分子名称: PHOSPHOHEPTOSE ISOMERASE, ZINC ION (3 entities in total)
• 機能のキーワード: capsule biogenesis/degradation, capsule, isomerase, carbohydrate metabolism
• 由来する生物種: BURKHOLDERIA PSEUDOMALLEI
• タンパク質・核酸の鎖数: 8
• 化学式量合計: 187671.29

構造登録者

Harmer, N.J. (登録日: 2010-01-28, 公開日: 2010-05-19, 最終更新日: 2023-12-20)

主引用文献

Harmer, N.J.
The Structure of Sedoheptulose-7-Phosphate Isomerase from Burkholderia Pseudomallei Reveals a Zinc Binding Site at the Heart of the Active Site.
J.Mol.Biol., 400:379-, 2010

PubMed Abstract: Heptoses are found in the surface polysaccharides of most bacteria, contributing to structures that are essential for virulence and antibiotic resistance. Consequently, the biosynthetic enzymes for these sugars are attractive targets for novel antibiotics. The best characterized biosynthetic enzyme is GmhA, which catalyzes the conversion of sedoheptulose-7-phosphate into D-glycero-D-manno-heptopyranose-7-phosphate, the first step in the biosynthesis of heptose. Here, the structure of GmhA from Burkholderia pseudomallei is reported. This enzyme contains a zinc ion at the heart of its active site: this ion stabilizes the active, closed form of the enzyme and presents coordinating side chains as a potential acid and base to drive catalysis. A complex with the product demonstrates that the enzyme retains activity in the crystal and thus suggests that the closed conformation is catalytically relevant and is an excellent target for the development of therapeutics. A revised mechanism for the action of GmhA is postulated on the basis of this structure and the activity of B. pseudomallei GmhA mutants.

PubMed: 20447408
DOI: 10.1016/J.JMB.2010.04.058

実験手法

X-RAY DIFFRACTION (2.4 Å)