P35 Protein is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
p35 (also known as CDK5R1) is the neuronal-specific regulatory subunit of cyclin-dependent kinase 5 (CDK5). It plays a critical role in brain development, synaptic plasticity, and neuronal function. The p35/CDK5 complex is essential for proper neuronal migration, axon guidance, and synapse formation during development and throughout life [1][2].
| Property | Value |
|---|---|
| Protein Name | p35 / CDK5R1 |
| Gene | CDK5R1 |
| UniProt ID | Q15078 |
| Molecular Weight | ~35 kDa (350 amino acids) |
| Isoforms | p35 (full-length), p25 (cleaved form) |
| Tissue Specificity | Neuron-specific |
The p35 protein contains several key structural features:
During embryonic and early postnatal development, p35/CDK5 regulates:
In mature neurons, p35/CDK5 activity modulates:
In Alzheimer's disease, p35 is cleaved by calpain to generate p25, a truncated form that:
The p25/CDK5 complex is hyperactive in AD brains and contributes to:
Dysregulation of p35/CDK5 signaling in PD:
In ALS:
Targeting the p35/CDK5 pathway for neurodegeneration:
CDK5R1 is predominantly expressed in:
Expression is neuron-specific and peaks during development.
Key partners of p35/CDK5:
The study of P35 Protein has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
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Patrick GN, et al. (1999). Conversion of p35 to p25 deregulates Cdk5 activity and promotes neurodegeneration. Nature. 402(6762):615-622. PMID:10604477 ↩︎
Ohshima T, et al. (1996). Targeted disruption of the cyclin-dependent kinase 5 gene results in abnormal corticogenesis, neuronal pathology and perinatal death. Proc Natl Acad Sci. 93(20):11173-11178. PMID:8855328 ↩︎
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Bridi MS, et al. (2020). The Role of CDK5 in Alzheimer's and Parkinson's Diseases. Mol Neurobiol. 57(11):4649-4664. PMID:32748261 ↩︎
Jin J, et al. (2015). The involvement of CDK5 in neurodegenerative disorders. Neural Regen Res. 10(9):1438-1440. PMID:26604871 ↩︎
Cruz PS, et al. (2021). CDK5 in Amyotrophic Lateral Sclerosis. Front Cell Neurosci. 15:658761. PMID:34093133 ↩︎
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