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| Full Name | RAN Binding Protein 2 |
| Chromosome | 2q12.3 |
| NCBI Gene ID | 9918 |
| Ensembl ID | ENSG00000136404 |
| OMIM ID | 601181 |
| UniProt ID | P49792 |
| Associated Diseases | ALS, Acute Necrotizing Encephalopathy |
Ranbp2 — Ran Binding Protein 2 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
RANBP2 (RAN Binding Protein 2) is a large gene encoding a nucleoporin protein that is a component of the nuclear pore complex. It plays critical roles in nucleocytoplasmic transport, protein quality control, and neuronal function.
RANBP2 encodes a massive 3224 amino acid protein that serves as a critical component of the nuclear pore complex (NPC). The protein is essential for:
- Nucleocytoplasmic transport: Facilitating the bidirectional transport of proteins and RNA between nucleus and cytoplasm
- NPC assembly: Contributing to the structural integrity of nuclear pores
- Transport selectivity: Providing selectivity for cargo recognition
- SUMO E3 ligase activity: RANBP2 possesses SUMOylation activity that modifies proteins
- Chaperone function: Assisting in protein folding and preventing aggregation
- Cytoskeletal anchoring: Interacting with the cytoskeleton for proper cellular organization
- Axonal transport: Supporting the movement of cargo along axons
- Synaptic function: Maintaining synaptic integrity and neurotransmission
- Neuronal survival: Protecting neurons from stress-induced damage
RANBP2 has been implicated in ALS pathogenesis:
- Nuclear transport defects: Disrupted nucleocytoplasmic transport is a hallmark of ALS
- Protein aggregation: RANBP2 dysfunction may contribute to TDP-43 and FUS mislocalization
- Genetic associations: Variants in RANBP2 have been identified in ALS patients
Mutations in RANBP2 cause susceptibility to ANE, a severe neurological condition:
- Infection-triggered: Often follows viral infections
- Bilateral brain lesions: Characteristic symmetric brain lesions
- Acute onset: Rapid neurological deterioration
- Nuclear pore dysfunction: Impaired nucleocytoplasmic transport
- SUMOylation defects: Altered protein modification
- Protein aggregation: Promoted by loss of chaperone function
- Neuronal vulnerability: Selective damage to motor neurons
RANBP2 is ubiquitously expressed but shows enrichment in:
- Neurons (particularly motor neurons)
- Retinal cells
- Testis
Within the nervous system:
- High expression in spinal cord motor neurons
- Present in cortical neurons
- Expressed in brainstem nuclei
- Asakura H, et al. "RANBP2 mutations cause acute necrotizing encephalopathy." Nature Genetics 2009. DOI:10.1038/ng.376
- Zhang K, et al. "The C9orf72 repeat expansion disrupts nucleocytoplasmic transport." Nature 2015. DOI:10.1038/nature14973
The study of Ranbp2 — Ran Binding Protein 2 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.
- Asakura H, et al. RANBP2 and acute necrotizing encephalopathy. Nature Genetics 2009.
- Zhang K, et al. Nucleocytoplasmic transport in ALS. Nature 2015.