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Studying Multi-Target Drug Approaches and Posttranslational Modification (PTM) Therapies

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

Deadline for manuscript submissions: 20 January 2026 | Viewed by 744

Special Issue Editor


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Guest Editor
1. Rocky Mount Life Sciences Institute, Rocky Mount, NC 27804, USA
2. National Engineering Research Center for Non-Food Biorefinery, Guangxi Academy of Sciences, Chinese Academy of Agriculture Science, Nanning 530004, China
Interests: biomolecular interactions; structures and functions of biomolecules; nuclear magnetic resonance (NMR); X-ray crystallography; bioinformatics; artificial intelligence (AI); machine learning (ML); deep learning (DL); molecular dynamics simulation (MDS)
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Special Issue Information

Dear Colleagues,

Multi-target therapy is the favoured pathway for achieving desired treatment effects in cancer and nervous system, cardiovascular system, and immune system diseases. Network analysis tools and computational prediction approaches have been incorporated into research of the basic mechanisms of these diseases. These computational approaches are novel, and are closely associated with the identification of the subcellular localization of so-called “multi-label” proteins. Recently, user-friendly web-server predictors have been established, whereby users can easily attain their desired results for multi-label proteins in eukaryotic, human, animal, plant, Gram-positive, and Gram-negative organisms, respectively. Posttranslational modifications (PTMs) are related to a number of diseases. In order to obtain targets’ 3D structures for rational drug design in a timely and accurate manner, both theoretical and experimental approaches of structural biology are used. Certain intermolecular and intramolecular interactions related to the migration and invasion of tumor cells may occur during the PTM process. In this Special Issue, recent advances in studying multi-target therapies and PTM will be collected. These studies may provide new perspectives on drug research and development related to tumor-targeted enzymes.

This Special Issue is supervised by Prof. Dr. Guo-Ping Zhou and assisted by our Guest Editor’ assistant editor Dr. Bo Lu, (Institute of Biological Science and Technology, Guangxi Academy of Sciences).

Prof. Dr. Guo-Ping Zhou
Guest Editor

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Keywords

  • multi-target therapy
  • network analysis tools
  • multi-label proteins
  • web-server predictor
  • posttranslational modifications (PTMs)
  • 3D structures
  • rational drug design

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Published Papers (1 paper)

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Research

20 pages, 3040 KB  
Article
CDK5 Inhibits Synphilin-1 Ubiquitination and Basal Mitophagy: Implications for Parkinson’s Disease
by Mor Savyon, Eyal Avraham, Ankit Kumar Shah, Haya Hamza, Raymonde Szargel, Fatimah Abd Elghani, Malik Farhoud, Michal Toren-Hershkoviz, Nicole Pavoncello, Sofia Zaer, Rina Bandopadhyay, Hazem Safory and Simone Engelender
Int. J. Mol. Sci. 2025, 26(16), 8048; https://doi.org/10.3390/ijms26168048 - 20 Aug 2025
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Abstract
Parkinson’s disease (PD) is characterized by the loss of dopaminergic neurons in the substantia nigra and the presence of α-synuclein-positive inclusions known as Lewy bodies. Synphilin-1 is a protein of unknown function that interacts with α-synuclein and has been shown to exhibit cytoprotective [...] Read more.
Parkinson’s disease (PD) is characterized by the loss of dopaminergic neurons in the substantia nigra and the presence of α-synuclein-positive inclusions known as Lewy bodies. Synphilin-1 is a protein of unknown function that interacts with α-synuclein and has been shown to exhibit cytoprotective effects in both in vitro and in vivo models. In this study, we investigated whether synphilin-1 is phosphorylated by pathological CDK5 and explored the consequences of this modification. Pathological activation of CDK5 occurs mainly through its association with the calpain-cleaved protein p25. Although CDK5 inhibition protects against neurodegeneration in pharmacological PD models, we now show that p25 levels are increased in PD brains. Furthermore, we demonstrate that CDK5, in conjunction with p25, directly phosphorylates synphilin-1, mainly at serine 566. This phosphorylation reduces synphilin-1′s interaction with SIAH1, leading to reduced ubiquitination and subsequent accumulation. We also observed that CDK5-phosphorylated synphilin-1 exhibits a reduced ability to interact with PINK1 and to promote basal levels of mitophagy. Consistent with these findings, the phosphorylation-mimicking synphilin-1 S566E shows decreased translocation to mitochondria, and synphilin-1 levels are reduced in the mitochondria of PD brains compared to age-matched controls. Finally, synphilin-1 S566E promotes retraction of neuronal processes. Taken together, our results suggest that phosphorylation by CDK5 disrupts synphilin-1′s interactions with its protein partners, rendering it more toxic and impairing its ability to support mitophagy and maintain neuronal process homeostasis. We hypothesize that phosphorylation of synphilin-1 by CDK5 may contribute to the pathogenesis of PD. Full article
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