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Peptides and Peptidomimetics for Targeting Protein-Protein Interactions

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Biochemistry".

Deadline for manuscript submissions: 20 November 2025 | Viewed by 1516

Special Issue Editors


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Guest Editor
Department of Drug Sciences, University of Pavia, Pavia, Italy
Interests: medicinal chemistry; drug discovery; green chemistry; multitarget-directed ligands; chirality; neurodegenerative diseases; cancer

E-Mail Website
Guest Editor
Department of Drug Sciences, University of Pavia, Pavia, Italy
Interests: medicinal chemistry and drug design; synthesis of bioactive compounds; antimicrobial resistance; development of novel antibacterial and antiparasitic agents; spectroscopy; computer-aided structure–activity relationship studies; anticancer agents
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Special Issue Information

Dear Colleagues,

Protein–protein interactions (PPIs) are crucial for many biological processes, both under physiological and pathological conditions. It is estimated that the human interactome consists of up to 650,000 PPIs, most of which represent a potential therapeutic target for a wide range of diseases. However, this tremendous potential is still largely unexplored, due to the significant challenges in designing and producing therapeutic agents that are able to target PPIs. Specifically, small molecules are hardly suitable for targeting large and flat surfaces such as those involved in PPIs, whereas antibodies are usually more difficult to prepare, more expensive, and less bioavailable. Due to this scenario, peptides and peptidomimetics have emerged as viable alternatives that can preserve the advantages of both approaches while limiting their drawbacks. Notably, approximately 15-40% of all PPIs are thought to be mediated by short linear peptides, which could therefore serve as templates for the development of novel drug candidates. Continuous efforts in this field are currently contributing to the consolidation of a cutting-edge approach in medicinal chemistry that holds great promise for “drugging the undruggable”. This innovative mechanism of action could enhance the efficacy of currently available therapies or pave the way for the treatment of orphan diseases.

The present Special Issue aims to provide an overview of the current research on peptides and peptidomimetics for targeting PPIs. Suggested topics include, but are not limited to, the following:

  • Identification of natural peptides that mediate PPIs under physio-pathological conditions as a way to connect structural biology with drug discovery;
  • Rational design of peptides and peptidomimetics able to stabilise PPIs (e.g., molecular glues) or inhibit the formation thereof;
  • Computational approaches to design or identify such compounds by virtual screening, with a particular focus on drug discovery approaches “beyond the rule of 5”;
  • Novel approaches in the synthesis, purification, and characterisation of such compounds, with particular attention toward green chemistry and sustainability;
  • Screening modalities and validation of the mechanism of action.

Dr. Giacomo Rossino
Dr. Pasquale Linciano
Guest Editors

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Keywords

  • protein–protein interactions
  • peptide–protein interactions
  • interactome
  • proteomics
  • peptides
  • modified peptides
  • peptidomimetics
  • molecular glues
  • drug discovery
  • medicinal chemistry
  • rule of five
  • biophysical assays
  • molecular modelling
  • cancer
  • neurodegenerative diseases
  • orphan diseases
  • antimicrobial resistance
  • PROTAC

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Published Papers (1 paper)

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Research

18 pages, 3384 KiB  
Article
Identification and Molecular Mechanism of Novel α-Glucosidase Inhibitory Peptides from the Hydrolysate of Hemp Seed Proteins: Peptidomic Analysis, Molecular Docking, and Dynamics Simulation
by Zhang Mengyuan, Chen Chen, Wei Feng, Zhao Ning, Yang Wanyu, Zhang Tianrong, Ren Guoyan, Qiu Zhijun and Zhang Bin
Int. J. Mol. Sci. 2025, 26(5), 2222; https://doi.org/10.3390/ijms26052222 - 28 Feb 2025
Cited by 1 | Viewed by 608
Abstract
There is a growing demand for natural and potent α-glucosidase inhibitors due to the rising prevalence of diabetes. In this study, newly identified α-glucosidase inhibitory peptides were identified from the tryptic hydrolysate of hemp seed proteins based on peptidomics and in silico analysis. [...] Read more.
There is a growing demand for natural and potent α-glucosidase inhibitors due to the rising prevalence of diabetes. In this study, newly identified α-glucosidase inhibitory peptides were identified from the tryptic hydrolysate of hemp seed proteins based on peptidomics and in silico analysis. A total of 424 peptides, primarily derived from four cupin-type-1 domain-containing proteins, were identified, and 13 ultimately were selected for validation based on their higher PeptideRanker scores, solubility, non-toxicity, and favorable ADMET properties. Molecular docking revealed that these 13 peptides primarily interacted with α-glucosidase via hydrogen bonding and hydrophobic interactions. Among them, three novel peptides—NPVSLPGR (−8.7 kcal/mol), LSAERGFLY (−8.5 kcal/mol), and PDDVLANAF (−8.4 kcal/mol)—demonstrated potent α-glucosidase inhibitory activity due to their lower binding energies than acarbose (−8.1 kcal/mol), the first approved α-glucosidase inhibitor for type 2 diabetes treatment. The molecular mechanism analysis revealed that the peptides NPVSLPGR and LSAERGFLY inhibited α-glucosidase by simultaneously blocking substrate entry through occupying the entrance of the active site gorge and preventing catalysis by binding to active sites. In contrast, the peptide PDDVLANAF primarily exerted inhibitory effects by occupying the entrance of the active site gorge. Molecular dynamics simulation validated the stability of the complexes and provided additional insights into the molecular mechanism determined through docking. These findings contribute essential knowledge for the advancement of natural α-glucosidase inhibitors and offer a promising approach to effectively manage diabetes. Full article
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