Angiotensin-Converting Activity of Tissue Kallikrein
- 1 January 1990
- journal article
- research article
- Published by S. Karger AG in Nephron
- Vol. 55 (1) , 62-64
- https://doi.org/10.1159/000186037
Abstract
This study examined the ability of tissue kallikreins, purified from both rat submandibular gland (SMG) and human urine, to form angiotensin II from synthetic angiotensin I. Both kallikreins converted angiotensin I to angiotensin II at neutral pH with the following kinetic constants: SMG kallikrein, Km = 9.43×105 mol/l, Kcat = 1.58 μmol/mg protein/min; human urinary kallikrein, Km = 1.71 × 10 4 mol/l, Kcat = 0.06 μmol/mg protein/min. These activities were not affected by angiotensin-converting enzyme (ACE) inhibitor. These results suggest that tissue kallikrein might participate in the formation of angiotensin II during administration of an ACE inhibitor.Keywords
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