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Cell Cycle-Related Proteins: Biochemical Regulative/Deregulative Mechanisms

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 April 2025 | Viewed by 1411

Special Issue Editor


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Guest Editor
Department of Precision Medicine, University of Campania “Luigi Vanvitelli”, 80138 Naples, Italy
Interests: CIP/KIP proteins; p57Kip2; p27Kip1; p53; cell cycle regulation and cell differentiation; DNA damage; post-translational modifications; phosphorylation; kinase inhibitors; natural compounds; mesenchymal stem cells; cancer; Bechwidth-Wiedemann syndrome; IMAGe; Russell-Silver syndrome; hypoxia-related diseases; iron metabolism
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Special Issue Information

Dear Colleagues,

Cell division is a finely tuned process in which post-translational modifications (PTMs) play a crucial role in modulating the stability, subcellular localization, and functions of Cyclins, Cyclin-Dependent Kinases (CDKs), and their regulators. To date, hundreds of PTMs have been reported to modulate the activity of cell cycle-related proteins. These modifications are essential for genome stability and the proper timing of cell cycle progression, especially during mitosis when transcriptional activity is limited, thus preventing abnormal cell division. However, full knowledge of their regulatory mechanisms is still lacking. To be noted, cell cycle-related proteins are involved in numerous additional biological processes, like transcription regulation, cell differentiation, DNA damage response, cytoskeleton remodeling, the regulation of metabolism, cell death, stem cell fate, senescence, and development, beyond the regulation of cell division. Indeed, their alterations lead to pathologies that range from growth-related diseases to degenerative diseases and, obviously, cancer. In addition, regarding cancer therapy, the discovery of peculiar PTMs of cell cycle-related proteins has been associated with the response to treatment with kinase inhibitors approved by the FDA. Thus, clarifying their biochemical regulation and deregulation is important to elucidate their impact on their physiological and pathological functions, and at the same time, in the era of precision medicine, it will contribute to the formulation of new therapeutic strategies.

This Special Issue will focus on the biochemical regulative and deregulative pathways of cell cycle-related proteins in health and various pathologies, in particular, cancer and growth-related diseases; on their role as sensitizing or resistance factors to therapy; on their therapeutic implications.

Dr. Emanuela Stampone
Guest Editor

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Keywords

  • cell cycle
  • cell division
  • cyclins
  • cyclin-dependent kinases (CDKs)
  • biochemical regulative mechanisms

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Published Papers (1 paper)

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Research

23 pages, 2522 KiB  
Article
p57Kip2 Phosphorylation Modulates Its Localization, Stability, and Interactions
by Emanuela Stampone, Debora Bencivenga, Luisa Dassi, Sara Sarnelli, Luisa Campagnolo, Valentina Lacconi, Fulvio Della Ragione and Adriana Borriello
Int. J. Mol. Sci. 2024, 25(20), 11176; https://doi.org/10.3390/ijms252011176 - 17 Oct 2024
Viewed by 925
Abstract
p57Kip2 is a member of the cyclin-dependent kinase (CDK) Interacting Protein/Kinase Inhibitory Protein (CIP/Kip) family that also includes p21Cip1/WAF1 and p27Kip1. Different from its siblings, few data are available about the p57Kip2 protein, especially in humans. Structurally, p57 [...] Read more.
p57Kip2 is a member of the cyclin-dependent kinase (CDK) Interacting Protein/Kinase Inhibitory Protein (CIP/Kip) family that also includes p21Cip1/WAF1 and p27Kip1. Different from its siblings, few data are available about the p57Kip2 protein, especially in humans. Structurally, p57Kip2 is an intrinsically unstructured protein, a characteristic that confers functional flexibility with multiple transient interactions influencing the metabolism and roles of the protein. Being an IUP, its localization, stability, and binding to functional partners might be strongly modulated by post-translational modifications, especially phosphorylation. In this work, we investigated by two-dimensional analysis the phosphorylation pattern of p57Kip2 in different cellular models, revealing how the human protein appears to be extensively phosphorylated, compared to p21Cip1/WAF1 and p27Kip1. We further observed clear differences in the phosphoisoforms distributed in the cytosolic and nuclear compartments in asynchronous and synchronized cells. Particularly, the unmodified form is detectable only in the nucleus, while the more acidic forms are present in the cytoplasm. Most importantly, we found that the phosphorylation state of p57Kip2 influences the binding with some p57Kip2 partners, such as CDKs, LIMK1 and CRM1. Thus, it is necessary to completely identify the phosphorylated residues of the protein to fully unravel the roles of this CIP/Kip protein, which are still partially identified. Full article
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