Rad23B Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Rad23B Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
RAD23B (RAD23 Homolog B) is a DNA damage repair gene located on chromosome 9q31.2 that encodes a protein involved in nucleotide excision repair (NER) and the [ubiquitin-proteasome system](/mechanisms/ubiquitin-proteasome-system). As a paralog of RAD23A, RAD23B shares structural and functional similarities but has distinct expression patterns and tissue distributions. The 409-amino acid protein is expressed throughout the brain and body, with particular importance in neuronal cells where DNA repair and protein quality control are critical for long-term survival.
Function
RAD23B is a homolog of RAD23A with overlapping functions in nucleotide excision repair (NER) and the ubiquitin-proteasome system. Like RAD23A, it serves as an XPC receptor in NER and connects DNA repair to protein degradation.
RAD23B is particularly important in the nervous system due to its role in both DNA repair and protein quality control. Neuronal protein aggregates in neurodegenerative diseases may overwhelm these systems.
Disease Associations
Alzheimer's Disease
RAD23B helps clear damaged proteins via the proteasome. Reduced RAD23B function may contribute to the accumulation of toxic protein aggregates in AD.
Parkinson's Disease
The dual role of RAD23B in DNA repair and protein quality control is relevant to PD pathogenesis. Lewy bodies contain ubiquitinated proteins that may overwhelm the RAD23B-proteasome pathway.
Xeroderma Pigmentosum
RAD23B can partially compensate for XPC deficiency, and variants may modify XP disease severity.
Expression
RAD23B is expressed in all brain regions, with highest expression in the [hippocampus](/brain-regions/hippocampus) and cerebral [cortex](/brain-regions/cortex). Expression is constitutive.
Key Publications
[RAD23B in NER and proteasome (2002)](https://doi.org/10.1016/s0092-8674(02)00710-9)
[Protein quality control in neurodegeneration (2019)](https://doi.org/10.1016/j.neurobiolaging.2019.06.012)
Background
The study of Rad23B Gene 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.
External Links
[PubMed](https://pubmed.ncbi.nlm.nih.gov/) - Biomedical literature
[Alzheimer's Disease Neuroimaging Initiative](https://adni.loni.usc.edu/) - Research data
[Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data