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| Main Authors: | , , , , , , , , , , |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Marine drugs
2025
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| Subjects: | |
| Online Access: | https://pubmed.ncbi.nlm.nih.gov/40559635/ |
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Table of Contents:
- Potential of Marine Bacterial Metalloprotease A69 in the Preparation of Antarctic Krill Peptides with Multi-Bioactivities. Liu, Rui Cao, Wen-Jie Zhao, Wen-Xiao Yuan, Xiao-Jie Zhang, Yu-Zhong Qin, Qi-Long Song, Xiao-Yan Zhang, Xi-Ying Li, Jian Chen, Xiu-Lan Zhang, Yu-Qiang Euphausiacea Animals Peptides Antarctic Regions Metalloproteases Angiotensin-Converting Enzyme Inhibitors Antioxidants Anti-Bacterial Agents Bacterial Proteins Hydrolysis Aquatic Organisms Escherichia coli Antarctic krill () is a nutrient-rich marine resource. Although several terrestrial proteases have been used to prepare Antarctic krill peptides (AKPs), there has been no report on the preparation of AKPs using a marine protease. Here, marine bacterial protease A69 was used to prepare AKPs with multi-bioactivities. Through optimizing hydrolysis parameters, we established a process for AKPs preparation by hydrolyzing Antarctic krill powder with A69. In the prepared AKPs, peptides less than 3000 Da and 1000 Da accounted for 99.23% and 88.37%, respectively. The scavenging ratios of the AKPs to ABTS, DPPH· and ·OH reached 93.23 ± 0.09%, 99.90 ± 0.15%, and 93.90 ± 0.47%, respectively. The AKPs also had high angiotensin-converting enzyme (ACE)-inhibitory activity, with an IC of 0.22 ± 0.04 mg/mL. At 40 mg/mL, the AKPs inhibited α-glucosidase and dipeptidyl peptidase IV (DPP-IV) activities by 7.18% and 13.62%, respectively, and displayed antibacterial activity to . Moreover, 14 antioxidant peptides, 24 ACE-inhibitory peptides, 2 α-glucosidase-inhibitory peptides, and 10 DPP-Ⅳ-inhibitory peptides were identified from the AKPs. These results demonstrate that the prepared AKPs contain diverse bioactive peptides and have multi-bioactivities. This study indicates that marine bacterial protease A69 has promising application potential in preparing AKPs with multi-bioactivities.