Protein Kinase Regulation in Cellular Signaling

Protein kinases are a large family of enzymes that catalyse the transfer of phosphate groups from ATP to specific amino acid residues on target proteins, thereby modulating their activity, localisation and interactions. In cellular signalling, these phosphorylation events form the backbone of pathways that govern cell proliferation, differentiation, metabolism, motility and survival. Tight control of kinase activity is achieved through multiple layers of regulation, including conformational changes induced by phosphorylation of the activation loop, binding of lipids or second messengers, and association with regulatory subunits or adaptor proteins such as small GTPases. Crosstalk among kinases and phosphatases ensures signal specificity and temporal precision. Dysregulation of protein kinase networks underlies many human diseases, notably cancer, metabolic disorders and neurodegeneration, making kinases prominent targets for therapeutic intervention. Advances in structural biology, chemical biology and in vivo models have continued to refine our understanding of isoform-specific functions and the mechanisms that fine-tune kinase-driven signalling circuits.

Research from Nature Portfolio

Recent studies have elucidated the non-redundant role of PKN3 in physiological and pathological angiogenesis. Genetic deletion of PKN3 in mice impairs micro-vessel sprouting in ex vivo assays and attenuates tumour cell metastasis in vivo. Mechanistic investigations reveal that loss of PKN3 disrupts glycosylation and maturation of key cell-surface glycoproteins, such as integrins and adhesion molecules, thereby compromising endothelial cell adhesion and tumour cell extravasation. This work positions PKN3 as a critical effector of Rho-mediated cytoskeletal reorganisation with promising implications for the development of anti-angiogenic and anti-metastatic therapies.

Protein Kinase Regulation in Cellular Signaling publication trend

The graph below shows the total number of articles in protein kinase regulation in cellular signaling across all publications each year (not limited to Nature Index journals).

Technical terms

Protein kinase: Enzyme that transfers a phosphate group from ATP to specific amino acids on substrate proteins, regulating their function.

Phosphorylation: Addition of a phosphate group to a protein or other organic molecule, altering activity, stability or interactions.

Activation loop: Segment within kinase catalytic domain whose phosphorylation induces structural realignment necessary for enzymatic function.

Rho GTPase: Small GTP-binding protein that acts as a molecular switch, controlling cytoskeletal organisation and kinase activation.

Angiogenesis: Process by which new blood vessels form from existing vasculature, essential in development and often hijacked by tumours.

References

1. PKN3 is the major regulator of angiogenesis and tumor metastasis in mice. Scientific Reports (2016).
2. Protein kinase N1 deficiency results in upregulation of cerebral energy metabolism and is highly protective in in vivo and in vitro stroke models. Metabolism (2024).
3. The structure and function of protein kinase C-related kinases (PRKs). Biochemical Society Transactions (2021).
4. Development of 2-(4-pyridyl)-benzimidazoles as PKN2 chemical tools to probe cancer. Bioorganic & Medicinal Chemistry Letters (2020).