Identification of angiotensin I-converting enzyme inhibitory peptides derived from enzymatic hydrolysates of razor clam Sinonovacula constricta

Li, Yun, Sadiq, Faizan Ahmed ORCID: https://orcid.org/0000-0003-1596-4155, Fu, Li, Zhu, Hui, Zhong, Minghua and Sohail, Muhammad 2016. Identification of angiotensin I-converting enzyme inhibitory peptides derived from enzymatic hydrolysates of razor clam Sinonovacula constricta. Marine Drugs 14 (6) , 110. 10.3390/md14060110

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Abstract

Angiotensin I-converting enzyme (ACE) inhibitory activity of razor clam hydrolysates produced using five proteases, namely, pepsin, trypsin, alcalase, flavourzyme and proteases from Actinomucor elegans T3 was investigated. Flavourzyme hydrolysate showed the highest level of degree of hydrolysis (DH) (45.87%) followed by A. elegans T3 proteases hydrolysate (37.84%) and alcalase (30.55%). The A. elegans T3 proteases was observed to be more effective in generating small peptides with ACE-inhibitory activity. The 3 kDa membrane permeate of A. elegans T3 proteases hydrolysate showed the highest ACE-inhibitory activity with an IC50 of 0.79 mg/mL. After chromatographic separation by Sephadex G-15 gel filtration and reverse phase-high performance liquid chromatography, the potent fraction was subjected to MALDI/TOF-TOF MS/MS for identification. A novel ACE-inhibitory peptide (VQY) was identified exhibiting an IC50 of 9.8 μM. The inhibitory kinetics investigation by Lineweaver-Burk plots demonstrated that the peptide acts as a competitive ACE inhibitor. The razor clam hydrolysate obtained by A. elegans T3 proteases could serve as a source of functional peptides with ACE-inhibitory activity for physiological benefits.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Dentistry
Publisher:	MDPI
ISSN:	1660-3397
Date of Acceptance:	30 May 2016
Last Modified:	03 May 2024 01:28
URI:	https://orca.cardiff.ac.uk/id/eprint/168397

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