6SJU

Human kallikrein 7 with aromatic coumarinic ester compound 3 covalently bound to H57

Summary for 6SJU

• Entry DOI: 10.2210/pdb6sju/pdb
• Descriptor: Kallikrein-7, TRIETHYLENE GLYCOL, SULFATE ION, ... (6 entities in total)
• Functional Keywords: serine protease, covalent inhibitor, complex, hydrolase
• Biological source: Homo sapiens (Human)
• Total number of polymer chains: 8
• Total formula weight: 209121.97

Authors

Hanke, S.,Straeter, N. (deposition date: 2019-08-13, release date: 2020-05-20, Last modification date: 2024-11-20)

Primary citation

Hanke, S.,Tindall, C.A.,Pippel, J.,Ulbricht, D.,Pirotte, B.,Reboud-Ravaux, M.,Heiker, J.T.,Strater, N.
Structural Studies on the Inhibitory Binding Mode of Aromatic Coumarinic Esters to Human Kallikrein-Related Peptidase 7.
J.Med.Chem., 63:5723-5733, 2020

PubMed Abstract: The serine protease kallikrein-related peptidase 7 (KLK7) is a member of the human tissue kallikreins. Its dysregulation leads to pathophysiological inflammatory processes in the skin. Furthermore, it plays a role in several types of cancer. For the treatment of KLK7-associated diseases, coumarinic esters have been developed as small-molecule enzyme inhibitors. To characterize the inhibition mode of these inhibitors, we analyzed structures of the inhibited protease by X-ray crystallography. Electron density shows the inhibitors covalently attached to His57 of the catalytic triad. This confirms the irreversible character of the inhibition process. Upon inhibitor binding, His57 undergoes an outward rotation; thus, the catalytic triad of the protease is disrupted. Besides, the halophenyl moiety of the inhibitor was absent in the final enzyme-inhibitor complex due to the hydrolysis of the ester linkage. With these results, we analyze the structural basis of KLK7 inhibition by the covalent attachment of aromatic coumarinic esters.

PubMed: 32374603
DOI: 10.1021/acs.jmedchem.9b01806

Experimental method

X-RAY DIFFRACTION (1.97 Å)