Identification and in silico analysis of novel antioxidant peptides in broken rice protein hydrolysate and its cytoprotective effect against H2O2-induced 2BS cell model

Ren, Likun; Yang, Yang; Ma, Chunmin; Fan, Jing; Bian, Xin; Liu, Baoxiang; Wang, Dang-feng; Zhu, Pengyu; Fu, Y.; Zhang, Na

doi:10.1016/j.foodres.2022.112108

Cited by 26 publications

(29 citation statements)

References 37 publications

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“…It has been shown that bioactive peptides can disrupt Keap2–Nrf2 interactions by occupying the active site of Keap1 [ 41 ]. The 2D and 3D molecular interactions of P2 (a and c) and P6 (b and d) with the Keap1 active site, shown in Figure 4 , were similar to the results for the antioxidant peptide of shredded rice protein origin, occupying the binding site of Nrf2 [ 42 ]. To more efficiently identify and analyze non-covalent interactions that may exist between Keap1 and P2 and P6, the Protein–Ligand Interaction Profiler ( (accessed on 18 November 2022)) was employed.…”

Section: Resultssupporting

confidence: 77%

Molecular Docking Revealed the Potential Anti-Oxidative Stress Mechanism of the Walnut Polypeptide on HT22 Cells

Zhang

Shang

et al. 2023

Foods

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The preparation of novel antioxidant peptides from food raw materials is one of the research focuses, but there are fewer studies on the preparation of antioxidant peptides from walnut meal, a by-product of processing walnuts. This study analyzed the antioxidant properties and protective effects of walnut protein hydrolyzed by alkaline protease and trypsin on the oxidative stress of HT22 cells. The peptides were identified by UPLC-MS/MS, and the anti-oxidative peptides were screened based on virtual computer tools. The potential anti-oxidative stress mechanism of the walnut polypeptide on HT22 cells was explored by molecular docking. The results revealed that walnut protein hydrolysates (WPH) with molecular weights of less than 1 kDa had good antioxidant properties and inhibited oxidative damage of HT22 cells by regulating the levels of reactive oxygen species (ROS) and antioxidant enzyme catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GSH-Px). Six of the ninety identified new peptides showed good solubility, non-toxicity, and bioactivity. The molecular docking results showed that the six peptides could dock with Keap1 successfully, and EYWNR and FQLPR (single-letter forms of peptide writing) could interact with the binding site of Nrf2 in the Keap1-Kelch structural domain through hydrogen bonds with strong binding forces. The results of this study provided important information on the antioxidant molecular mechanism of the walnut polypeptide and provided a basis for further development of walnut antioxidant polypeptide products.

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Section: Resultssupporting

confidence: 77%

Molecular Docking Revealed the Potential Anti-Oxidative Stress Mechanism of the Walnut Polypeptide on HT22 Cells

Zhang

Shang

et al. 2023

Foods

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“…Ala residue should play an important role in the antioxidant activity of MSP8 (ARW) and MSP13 (YPAGP). Aromatic AAs contain a benzene ring structure, which can provide hydrogen ions to convert ROS into more stable phenoxy radicals and control the peroxide domino effects mediated by ROS [ 10 , 20 , 74 ]. Sheng et al reported that Tyr and Phe residues in GEYGFE and Phe residue in IELFPGLP exerted key roles in their antioxidant activities [ 20 ].…”

Section: Discussionmentioning

confidence: 99%

“…Hydrophilic AA residues also are necessary for the activity of APs. Acidic (Asp, Glu, Asn and Gln) and basic (Lys and Arg) AA residues have been proven as excellent chelating agents of metal-ions because the excessive electrons in their carboxylic group could improve electrostatic and ionic with metal-ion to play their excellent metal-chelating function [ 10 , 76 ]. Therefore, basic (Arg and Lys) and acidic (Glu and Asp) AA residues were frequently found in APs, such as LKPGN [ 29 ], VPR, IEPH, LEEEE and IEEEQ [ 11 ], LDEPDPLI and NTDGSTDYGILQINSR [ 77 ], PHPR, VRDQY [ 54 ] and AEDKKLIQ [ 78 ].…”

Section: Discussionmentioning

confidence: 99%

“…Reactive oxygen species (ROS) are the metabolites of the respiration process and take on an important role in the physiological and biochemical reactions of organisms [ 10 ]. Normally, the body’s oxidative and antioxidant defense systems are in balance, and ROS performed many specific roles including serving as cell-growth factors and regulators of signals between cells [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

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Eighteen Novel Bioactive Peptides from Monkfish (Lophius litulon) Swim Bladders: Production, Identification, Antioxidant Activity, and Stability

Yan

Wang

et al. 2023

Marine Drugs

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In the study, papain was chosen from five proteases to hydrolyze proteins of monkfish swim bladders for effectively utilizing monkfish (Lophius litulon) processing byproducts, and the hydrolysis conditions of papain were optimized as hydrolysis temperature of 65 °C, pH 7.5, enzyme dose 2.5% and time 5 h using single-factor and orthogonal experiments. Eighteen peptides were purified from the swim bladder hydrolysate of monkfish by ultrafiltration and gel permeation chromatography methods and identified as YDYD, QDYD, AGPAS, GPGPHGPSGP, GPK, HRE, GRW, ARW, GPTE, DDGGK, IGPAS, AKPAT, YPAGP, DPT, FPGPT, GPGPT, GPT and DPAGP, respectively. Among eighteen peptides, GRW and ARW showed significant DPPH· scavenging activities with EC50 values of 1.053 ± 0.003 and 0.773 ± 0.003 mg/mL, respectively; YDYD, QDYD, GRW, ARW and YPAGP revealed significantly HO· scavenging activities with EC50 values of 0.150 ± 0.060, 0.177 ± 0.035, 0.201 ± 0.013, 0.183 ± 0.0016 and 0.190 ± 0.010 mg/mL, respectively; YDYD, QDYD, ARW, DDGGK and YPAGP have significantly O2−· scavenging capability with EC50 values of 0.126 ± 0.0005, 0.112 ± 0.0028, 0.127 ± 0.0002, 0.128 ± 0.0018 and 0.107 ± 0.0002 mg/mL, respectively; and YDYD, QDYD and YPAGP showed strong ABTS+· scavenging ability with EC50 values of 3.197 ± 0.036, 2.337 ± 0.016 and 3.839 ± 0.102 mg/mL, respectively. YDYD, ARW and DDGGK displayed the remarkable ability of lipid peroxidation inhibition and Ferric-reducing antioxidant properties. Moreover, YDYD and ARW can protect Plasmid DNA and HepG2 cells against H2O2-induced oxidative stress. Furthermore, eighteen isolated peptides had high stability under temperatures ranging from 25–100 °C; YDYD, QDYD, GRW and ARW were more sensitive to alkali treatment, but DDGGK and YPAGP were more sensitive to acid treatment; and YDYD showed strong stability treated with simulated GI digestion. Therefore, the prepared antioxidant peptides, especially YDYD, QDYD, GRW, ARW, DDGGK and YPAGP from monkfish swim bladders could serve as functional components applied in health-promoting products because of their high-antioxidant functions.

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“…However, it has been discovered that a vast number of peptides with a heterogenous composition can bind to Keap1. In particular, peptides that show Glu residues, which engage electrostatically with Arg 380, Arg 415, Arg 483 and Asp residues, interact intramolecularly with Arg 415 to stabilize the hairpin conformation of the structure [ 61 , 62 , 70 ].…”

Section: In Silico Prediction Of Bioactive Peptides Dockingmentioning

confidence: 99%

From In Silico to a Cellular Model: Molecular Docking Approach to Evaluate Antioxidant Bioactive Peptides

et al. 2023

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The increasing need to counteract the redox imbalance in chronic diseases leads to focusing research on compounds with antioxidant activity. Among natural molecules with health-promoting effects on many body functions, bioactive peptides are gaining interest. They are protein fragments of 2–20 amino acids that can be released by various mechanisms, such as gastrointestinal digestion, food processing and microbial fermentation. Recent studies report the effects of bioactive peptides in the cellular environment, and there is evidence that these compounds can exert their action by modulating specific pathways. This review focuses on the newest approaches to the structure–function correlation of the antioxidant bioactive peptides, considering their molecular mechanism, by evaluating the activation of specific signaling pathways that are linked to antioxidant systems. The correlation between the results of in silico molecular docking analysis and the effects in a cellular model was highlighted. This knowledge is fundamental in order to propose the use of bioactive peptides as ingredients in functional foods or nutraceuticals.

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Identification and in silico analysis of novel antioxidant peptides in broken rice protein hydrolysate and its cytoprotective effect against H2O2-induced 2BS cell model

Cited by 26 publications

References 37 publications

Molecular Docking Revealed the Potential Anti-Oxidative Stress Mechanism of the Walnut Polypeptide on HT22 Cells

Molecular Docking Revealed the Potential Anti-Oxidative Stress Mechanism of the Walnut Polypeptide on HT22 Cells

Eighteen Novel Bioactive Peptides from Monkfish (Lophius litulon) Swim Bladders: Production, Identification, Antioxidant Activity, and Stability

From In Silico to a Cellular Model: Molecular Docking Approach to Evaluate Antioxidant Bioactive Peptides

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