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Peptide Inhibitors for Angiotensin I Converting Enzyme from Corn Gluten Digests.  

오광석 (고려대학교 생명공학원)
이동건 (고려대학교 생명공학원)
홍정운 (고려대학교 생명공학원)
성하진 (고려대학교 생명공학원)
Publication Information
Microbiology and Biotechnology Letters / v.31, no.1, 2003 , pp. 51-56 More about this Journal
Abstract
The angiotensin I converting enzyme (ACE) has an important role in the maintenance of blood pressure. The ACE inhibitory activities of foods have recently been studied. We tried to isolate ACE inhibitory peptides from the Flavourzyme (FZ), Pescalase (PE), and Thermolysine (TH) protease digests of corn gluten, which was restricted to the use the source of food for digestion problem. The FZ, PE, TH/PE protease hydrolyzed corn gluten and the inhibitory activities of the hydrolyzates for ACE were measured. Major fractions were isolated from the digests using ODS chromatography after treating with ethanol in step gradient. The ACE inhibitors were further purified by Bio-Gel P-2 column and reverse phase HPLC. Five inhibitory peptides were isolated. Their amino acids were sequenced as LPF ($IC_{50}$ = 40$\mu$M), GPP ($IC_{50}$ = 17.6$\mu$M), PNPY ($IC_{50}$ = 30.7$\mu$M), SPPPFYL ($IC_{50}$ = 63 $\mu$M), and SQPP ($IC_{50}$ = 17.2$\mu$M).
Keywords
Angiotensin I-converting enzyme inhibitor; corn gluten; peptides;
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