1XUI

TRYPSIN-KETO-BABIM, ZN+2-FREE, PH 8.2

1XUI の概要

• エントリーDOI: 10.2210/pdb1xui/pdb
• 分子名称: TRYPSIN, CALCIUM ION, SODIUM ION, ... (5 entities in total)
• 機能のキーワード: complex, trypsin-small molecule ligand, designed small molecule ligand with micromolar affinity, serine protease
• 由来する生物種: Bos taurus (cattle)
• 細胞内の位置: Secreted, extracellular space: P00760
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 23733.70

構造登録者

Katz, B.A.,Clark, J.M.,Finer-Moore, J.S.,Jenkins, T.E.,Johnson, C.R.,Rose, M.J.,Luong, C.,Moore, W.R.,Stroud, R.M. (登録日: 1997-10-10, 公開日: 1998-11-11, 最終更新日: 2024-10-23)

主引用文献

Katz, B.A.,Clark, J.M.,Finer-Moore, J.S.,Jenkins, T.E.,Johnson, C.R.,Ross, M.J.,Luong, C.,Moore, W.R.,Stroud, R.M.
Design of potent selective zinc-mediated serine protease inhibitors.
Nature, 391:608-612, 1998

PubMed Abstract: Many serine proteases are targets for therapeutic intervention because they often play key roles in disease. Small molecule inhibitors of serine proteases with high affinity are especially interesting as they could be used as scaffolds from which to develop drugs selective for protease targets. One such inhibitor is bis(5-amidino-2-benzimidazolyl)methane (BABIM), standing out as the best inhibitor of trypsin (by a factor of over 100) in a series of over 60 relatively closely related analogues. By probing the structural basis of inhibition, we discovered, using crystallographic methods, a new mode of high-affinity binding in which a Zn2+ ion is tetrahedrally coordinated between two chelating nitrogens of BABIM and two active site residues, His57 and Ser 195. Zn2+, at subphysiological levels, enhances inhibition by over 10(3)-fold. The distinct Zn2+ coordination geometry implies a strong dependence of affinity on substituents. This unique structural paradigm has enabled development of potent, highly selective, Zn2+-dependent inhibitors of several therapeutically important serine proteases, using a physiologically ubiquitous metal ion.

PubMed: 9468142
DOI: 10.1038/35422

実験手法

X-RAY DIFFRACTION (1.5 Å)