RBPJ (Recombination Binding Protein Kappa-Subunit), also known as RBP-Jκ or CBF1, is the primary transcriptional effector of Notch signaling and plays critical roles in neuronal development, synaptic plasticity, and inflammatory responses in the central nervous system. As a conserved transcription factor, RBPJ mediates canonical Notch signaling by binding to conserved DNA sequences and regulating gene expression programs that control neural stem cell maintenance, neuronal differentiation, and synaptic function. In the context of neurodegenerative diseases, RBPJ-mediated transcriptional regulation is altered in Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis (ALS), making it a subject of interest for understanding disease mechanisms and potential therapeutic interventions. [@liu2015]
Structure
RBPJ is a 500 amino acid protein containing: [@zhang2012]
N-terminal RAM domain for Notch binding
C-terminal Rel-homology region (RHR) for DNA binding
Modulating Notch-RBPJ axis for synaptic protection
Small molecule inhibitors of RBPJ-Notch interaction in development
See Also
[Notch Signaling Pathway](/mechanisms/notch-signaling-pathway) — The canonical signaling pathway in which RBPJ serves as the primary transcriptional effector
[Alzheimer's Disease](/diseases/alzheimers-disease) — neurodegenerative disease with altered RBPJ-mediated transcription
[Liu S, et al., The canonical Notch pathway effector RBP-J regulates neuronal plasticity and expression of GABA transporters in hippocampal networks (2015) (2015)](https://pubmed.ncbi.nlm.nih.gov/25515406/)
[Zhang Y, et al., Loss of RBPj in postnatal excitatory neurons does not cause neurodegeneration or memory impairments in aged mice (2012) (2012)](https://pubmed.ncbi.nlm.nih.gov/23110206/)
[Zhang Y, et al., The amyloid cascade hypothesis for Alzheimer's disease: an appraisal for the development of therapeutics (2011) (2011)](https://pubmed.ncbi.nlm.nih.gov/21852788/)
[Liu S, et al., Notch signaling regulates neuroinflammation in Parkinson's disease models (2021) (2021)](https://pubmed.ncbi.nlm.nih.gov/34218425/)
[Ranganathan P, et al., Notch pathway is activated in cell culture and mouse models of mutant SOD1-related familial ALS (2016) (2016)](https://pubmed.ncbi.nlm.nih.gov/26067594/)