CDK5

Understanding Entity Pages

This page aggregates everything SciDEX knows about CDK5: its mechanistic relationships (Knowledge Graph edges), hypotheses targeting it, analyses mentioning it, and supporting scientific papers. The interactive graph below shows its immediate neighbors. All content is AI-synthesized from peer-reviewed literature.

Cyclin-Dependent Kinase 5 (CDK5) is a unique member of the CDK family that lacks a role in cell cycle regulation and is not activated by cyclins. Instead, CDK5 is activated by neuron-specific partners p35 and p39, which are expressed primarily in post-mitotic neurons. CDK5 phosphorylates numerous substrates including tau, APP, presenilins, and NMDA receptors, making it a critical regulator of neuronal function. In Alzheimer's disease and other neurodegenerative conditions, dysregulation of CDK5 occurs due to calpain-mediated cleavage of p35 to p25, leading to hyperactivation of CDK5 and hyperphosphorylation of tau at multiple AD-relevant epitopes. CDK5-mediated tau phosphorylation contributes to neurofibrillary tangle formation and granulovacuolar degeneration, both hallmarks of AD pathology. CDK5 also plays roles in synaptic plasticity, learning and memory, and motor neuron survival. While CDK5 inhibitors have been explored therapeutically, their lack of specificity and neural toxicity have been significant obstacles.

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graph TD
    CDK5["CDK5"] -.->|"inhibits"| BECN1["BECN1"]
    CDK5["CDK5"] -->|"interacts"| Ms["Ms"]
    CDK5["CDK5"] -->|"activates"| Als["Als"]
    CDK5["CDK5"] -->|"therapeutic target"| Alzheimer["Alzheimer"]
    CDK5["CDK5"] -.->|"inhibits"| Neurodegeneration["Neurodegeneration"]
    CDK5["CDK5"] -->|"activates"| Ms_1["Ms"]
    DCX["DCX"] -->|"interacts"| CDK5["CDK5"]
    PAFAH1B1["PAFAH1B1"] -->|"interacts"| CDK5["CDK5"]
    DAB1["DAB1"] -->|"interacts"| CDK5["CDK5"]
    LIS1["LIS1"] -->|"interacts"| CDK5["CDK5"]
    style CDK5 fill:#006494,stroke:#4fc3f7,stroke-width:2px,color:#e0e0e0

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