3E0N

The X-ray structure of Human Prostasin in complex with DFFR-chloromethyl ketone inhibitor

3E0N の概要

• エントリーDOI: 10.2210/pdb3e0n/pdb
• 関連するPDBエントリー: 3E0P 3E16 3E1X
• 関連するBIRD辞書のPRD_ID: PRD_002526
• 分子名称: Prostasin heavy chain, DPN-PHE-ARM, SULFATE ION, ... (5 entities in total)
• 機能のキーワード: prostasin, protease, chloromethyl-ketone, channel, enac, cell membrane, glycoprotein, hydrolase, membrane, secreted, serine protease, transmembrane, zymogen
• 由来する生物種: Homo sapiens (human); 詳細
• 細胞内の位置: Prostasin: Cell membrane; Single-pass membrane protein. Prostasin light chain: Secreted, extracellular space. Prostasin heavy chain: Secreted, extracellular space: Q16651
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 30542.99

構造登録者

Spraggon, G.,Hornsby, M.,Shipway, A.,Harris, J.L.,Lesley, S.A. (登録日: 2008-07-31, 公開日: 2009-06-16, 最終更新日: 2023-09-20)

主引用文献

Spraggon, G.,Hornsby, M.,Shipway, A.,Tully, D.C.,Bursulaya, B.,Danahay, H.,Harris, J.L.,Lesley, S.A.
Active site conformational changes of prostasin provide a new mechanism of protease regulation by divalent cations.
Protein Sci., 18:1081-1094, 2009

PubMed Abstract: Prostasin or human channel-activating protease 1 has been reported to play a critical role in the regulation of extracellular sodium ion transport via its activation of the epithelial cell sodium channel. Here, the structure of the extracellular portion of the membrane associated serine protease has been solved to high resolution in complex with a nonselective d-FFR chloromethyl ketone inhibitor, in an apo form, in a form where the apo crystal has been soaked with the covalent inhibitor camostat and in complex with the protein inhibitor aprotinin. It was also crystallized in the presence of the divalent cation Ca(+2). Comparison of the structures with each other and with other members of the trypsin-like serine protease family reveals unique structural features of prostasin and a large degree of conformational variation within specificity determining loops. Of particular interest is the S1 subsite loop which opens and closes in response to basic residues or divalent ions, directly binding Ca(+2) cations. This induced fit active site provides a new possible mode of regulation of trypsin-like proteases adapted in particular to extracellular regions with variable ionic concentrations such as the outer membrane layer of the epithelial cell.

PubMed: 19388054
DOI: 10.1002/pro.118

実験手法

X-RAY DIFFRACTION (1.7 Å)