Hnrnpa2B1 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.
HNRNPA2B1 (Heterogeneous Nuclear Ribonucleoprotein A2/B1) is a RNA-binding protein involved in RNA processing, splicing, and transport. Like its paralog HNRNPA1, pathogenic mutations in HNRNPA2B1 cause amyotrophic lateral sclerosis (ALS) and multisystem proteinopathy (MSP). The gene is located on chromosome 7p15.2 and encodes two alternatively spliced isoforms: A2 (341 amino acids) and B1 (353 amino acids).
| Attribute | Value |
|---|---|
| Gene Symbol | HNRNPA2B1 |
| Full Name | Heterogeneous Nuclear Ribonucleoprotein A2/B1 |
| Chromosomal Location | 7p15.2 |
| NCBI Gene ID | 3181 |
| OMIM ID | 600124 |
| Ensembl ID | ENSG00000122566 |
| UniProt ID | P22626 |
| Associated Diseases | ALS, Multisystem Proteinopathy, Inclusion Body Myopathy |
HNRNPA2B1 contains two RNA recognition motifs (RRMs) and a glycine-rich low-complexity domain similar to HNRNPA1. Key functions include:
The A2 and B1 isoforms differ by inclusion of 12 amino acids in the N-terminal region of B1, with both isoforms performing overlapping but distinct functions.
Dominant mutations in HNRNPA2B1 cause familial ALS. The D262V mutation (in the low-complexity domain) has been extensively characterized and:
Patients present with typical ALS phenotype including progressive muscle weakness, spasticity, and bulbar dysfunction.
HNRNPA2B1 mutations can cause MSP with features including:
Interestingly, common variants in HNRNPA2B1 have been associated with increased risk of asthma and certain autoimmune disorders, suggesting broader roles in immune regulation.
HNRNPA2B1 is ubiquitously expressed with high levels in:
Expression is detected in both neuronal and non-neuronal tissues.
The study of Hnrnpa2B1 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.