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|標題:||Isolation and characterisation of a novel angiotensin I-converting enzyme (ACE) inhibitory peptide from the algae protein waste||作者:||Sheih, I-Chuan
|關鍵字:||Microalgae;Chlorella vulgaris;Hypertension;Angiotensin 1-converting;enzyme;spontaneously hypertensive-rats;wakame undaria-pinnatifida;tryptic;hydrolysate;food proteins;system;identification;sequence;digest;skin||Project:||Food Chemistry, Volume 115, Issue 1, Page(s) 279-284.||摘要:||
A hendeca-peptide with angiotensin I-converting enzyme (ACE) inhibitory activity was isolated from the pepsin hydrolysate of algae protein waste, a mass-produced industrial by-product of an algae essence from microalgae, Chlorella vulgaris. Edman degradation revealed its amino acid sequence to be Val-Glu-Cys-Tyr-Gly-Pro-Asn-Ai-g-Pro-Gln-Phe. Inhibitory kinetics revealed a non-competitive binding made with IC(50) Value against ACE of 29.6 mu M, suggesting a potent amount of ACE inhibitory activity compared with other peptides from the microalgae protein hydrolysates which have a reported range between 11.4 and 315.3 mu M. In addition, the purified hendeca-peptide completely retained its ACE inhibitory activity at a pH range of 2-10, temperatures of 40-100 degrees C, as well as after treatments in vitro by a gastrointestinal enzyme, thus indicating its heat- and pH-stability. The combination of the biochemical properties of this isolated hendeca-peptide and a cheap algae protein resource make an attractive alternative for producing a high value product for blood pressure regulation as well as water and fluid balance. (C) 2008 Elsevier Ltd. All rights reserved.
|Appears in Collections:||食品暨應用生物科技學系|
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