1QQS

NEUTROPHIL GELATINASE ASSOCIATED LIPOCALIN HOMODIMER

1QQS の概要

• エントリーDOI: 10.2210/pdb1qqs/pdb
• 分子名称: NEUTROPHIL GELATINASE, alpha-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose, DECANOIC ACID, ... (4 entities in total)
• 機能のキーワード: neutrophil lipocalin, signal protein, glycoprotein, sugar binding protein
• 由来する生物種: Homo sapiens (human)
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 20771.67

構造登録者

Goetz, D.H.,Willie, S.T.,Armen, R.,Bratt, T.,Borregaard, N.,Strong, R.K. (登録日: 1999-06-07, 公開日: 2000-04-21, 最終更新日: 2024-11-20)

主引用文献

Goetz, D.H.,Willie, S.T.,Armen, R.S.,Bratt, T.,Borregaard, N.,Strong, R.K.
Ligand preference inferred from the structure of neutrophil gelatinase associated lipocalin
Biochemistry, 39:1935-1941, 2000

PubMed Abstract: Neutrophil gelatinase associated lipocalin (NGAL), a constituent of neutrophil granules, is a member of the lipocalin family of binding proteins. NGAL can also be highly induced in epithelial cells in both inflammatory and neoplastic colorectal disease. NGAL is proposed to mediate inflammatory responses by sequestering neutrophil chemoattractants, particularly N-formylated tripeptides and possibly leukotriene B(4) and platelet activating factor. The crystal structures of NGAL display a typical lipocalin fold, albeit with an unusually large and atypically polar binding site, or calyx. The fold of NGAL is most similar to the epididymal retinoic acid-binding protein, another lipocalin, though the overall architecture of the calyces are very different. The crystal structures also reveal either sulfate ions or an adventitiously copurified fatty acid bound in the binding site. Neither ligand is displaced by added N-formylated tripeptides. The size, shape, and character of the NGAL calyx, as well as the low relative affinity for N-formylated tripeptides, suggest that neither the copurified fatty acid nor any of the proposed ligands are likely to be the preferred ligand of this protein. Comparisons between the crystal structures and the recently reported solution structure of NGAL reveal significant differences, in terms of both the details of the structure and the overall flexibility of the fold.

PubMed: 10684642
DOI: 10.1021/bi992215v

実験手法

X-RAY DIFFRACTION (2.4 Å)