Preparation, Identification, and Enzyme Inhibition Kinetic Analysis of Phosvitin α-Amylase Inhibitory Peptides
To explore the inhibiting effect of phosvitin phosphopeptide (PPP) on α-amylase, enabling it to regulate blood glucose levels and alleviate type Ⅱ diabetes mellitus. This study employed enzymatic hydrolysis of phosvitin with the inhibition rate of α-amylase as an index, followed by enzyme inhibition...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
The editorial department of Science and Technology of Food Industry
2025-01-01
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| Series: | Shipin gongye ke-ji |
| Subjects: | |
| Online Access: | http://www.spgykj.com/cn/article/doi/10.13386/j.issn1002-0306.2024010363 |
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| Summary: | To explore the inhibiting effect of phosvitin phosphopeptide (PPP) on α-amylase, enabling it to regulate blood glucose levels and alleviate type Ⅱ diabetes mellitus. This study employed enzymatic hydrolysis of phosvitin with the inhibition rate of α-amylase as an index, followed by enzyme inhibition kinetics experiments to analyze the inhibitory type of PPP on α-amylase. LC-MS identification was conducted, and molecular docking was performed to screen for highly active α-amylase inhibitory peptides, which were subsequently validated. The results showed that optimal enzymatic hydrolysis conditions involved initial hydrolysis with trypsin (7000 U/g), followed by pepsin (60000 U/g) for 6 h each. The prepared PPP exhibited the highest α-amylase inhibition rate 70.69%±1.71% at a concentration of 7.81×10−3 mg/mL. PPP acted as a mixed-type inhibitor. Two novel highly active α-amylase inhibitory peptides FGTEPDAK and IWGR were identified and screened, exhibiting IC50 values of (0.80±0.14)×10−3 mg/mL and (1.80±0.31)×10−3 mg/mL, respectively. Both extremely significantly lower than the positive control acarbose's IC50 value (3.17±0.47)×10−3 mg/mL (P<0.01). This study highlights the potential use of PPP as a new hypoglycemic substance in developing functional foods for alleviating type Ⅱ diabetes mellitus. |
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| ISSN: | 1002-0306 |