Heterogeneous Nuclear Ribonucleoprotein A2/B1 (HNRNPA2B1)
Introduction
<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">Heterogeneous Nuclear Ribonucleoprotein A2/B1 (HNRNPA2B1)</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td><strong>HNRNP-A2B1</strong></td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Heterogeneous Nuclear Ribonucleoprotein A2/B1 (HNRNPA2B1)</td>
</tr>
<tr>
<td class="label">Type</td>
<td>Gene</td>
</tr>
<tr>
<td class="label">NCBI</td>
<td><a href="https://www.ncbi.nlm.nih.gov/gene/?term=HNRNP-A2B1" target="_blank">Search NCBI</a></td>
</tr>
</table>
Heterogeneous Nuclear Ribonucleoprotein A2 B1 (Hnrnpa2B1) is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
.infobox.infobox-gene [@liu2012]
!! HNRNPA2B1 - Heterogeneous Nuclear Ribonucleoprotein A2/B1 [@chen2013]
| Gene Symbol | [HNRNPA2B1](/genes/hnrnp-a2b1) | [@chow2009]
| Full Name | Heterogeneous Nuclear Ribonucleoprotein A2/B1 | [@hua2014]
| Chromosome | 7 | [@barall]
| Location | 7p15.2 | [^7]
| NCBI Gene ID | [3181](https://www.ncbi.nlm.nih.gov/gene/3181) | [@guo]
| OMIM | [600124](https://www.omim.org/entry/600124) |
| UniProt | [P22626](https://www.uniprot.org/uniprot/P22626) |
| Associated Diseases | Amyotrophic Lateral Sclerosis (ALS), Frontotemporal Dementia (FTD), Multisystem Proteinopathy |
Pathway Diagram
...Heterogeneous Nuclear Ribonucleoprotein A2/B1 (HNRNPA2B1)
Introduction
<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">Heterogeneous Nuclear Ribonucleoprotein A2/B1 (HNRNPA2B1)</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td><strong>HNRNP-A2B1</strong></td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Heterogeneous Nuclear Ribonucleoprotein A2/B1 (HNRNPA2B1)</td>
</tr>
<tr>
<td class="label">Type</td>
<td>Gene</td>
</tr>
<tr>
<td class="label">NCBI</td>
<td><a href="https://www.ncbi.nlm.nih.gov/gene/?term=HNRNP-A2B1" target="_blank">Search NCBI</a></td>
</tr>
</table>
Heterogeneous Nuclear Ribonucleoprotein A2 B1 (Hnrnpa2B1) is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
.infobox.infobox-gene [@liu2012]
!! HNRNPA2B1 - Heterogeneous Nuclear Ribonucleoprotein A2/B1 [@chen2013]
| Gene Symbol | [HNRNPA2B1](/genes/hnrnp-a2b1) | [@chow2009]
| Full Name | Heterogeneous Nuclear Ribonucleoprotein A2/B1 | [@hua2014]
| Chromosome | 7 | [@barall]
| Location | 7p15.2 | [^7]
| NCBI Gene ID | [3181](https://www.ncbi.nlm.nih.gov/gene/3181) | [@guo]
| OMIM | [600124](https://www.omim.org/entry/600124) |
| UniProt | [P22626](https://www.uniprot.org/uniprot/P22626) |
| Associated Diseases | Amyotrophic Lateral Sclerosis (ALS), Frontotemporal Dementia (FTD), Multisystem Proteinopathy |
Pathway Diagram
Mermaid diagram (expand to render)
Knowledge graph relationships for HNRNPA2B1 (306 total edges in KG)
Overview
Gene Symbol: HNRNPA2B1
Full Name: Heterogeneous Nuclear Ribonucleoprotein A2/B1
Chromosomal Location: 7 7p15.2
Normal Function
HNRNPA2B1 is a member of the hnRNP A2/B1 family of RNA-binding proteins. It participates in pre-mRNA processing, mRNA stability, and RNA transport. The protein is alternatively spliced to generate multiple isoforms with distinct functions.
Disease Associations
Pathogenic Mechanisms
The P195L and D262V mutations in HNRNPA2B1 are associated with familial ALS and MSP. These mutations promote the formation of cytoplasmic inclusions containing HNRNPA2B1 and other RNA-binding proteins. The aggregates disrupt normal RNA granule dynamics.
Clinical Manifestations
- Amyotrophic Lateral Sclerosis (ALS), Frontotemporal Dementia (FTD), Multisystem Proteinopathy
Therapeutic Implications
Research into HNRNPA2B1 mutations provides insights into neurodegenerative disease mechanisms and potential therapeutic targets. Gene therapy approaches targeting RNA metabolism and protein aggregation are being explored.
Key Publications
PMID: 21892188(https://pubmed.ncbi.nlm.nih.gov/21892188/) - HNRNPA2B1 mutations in ALS and multisystem proteinopathy
PMID: 21944778(https://pubmed.ncbi.nlm.nih.gov/21944778/) - Characterization of aggregation in neurodegeneration
PMID: 23154909(https://pubmed.ncbi.nlm.nih.gov/23154909/) - Function in synaptic plasticity
PMID: 23528559(https://pubmed.ncbi.nlm.nih.gov/23528559/) - Deficiency and lysosomal dysfunction
PMID: 25437335(https://pubmed.ncbi.nlm.nih.gov/25437335/) - Role in synaptic vesicle traffickingSee Also
- [Amyotrophic Lateral Sclerosis (ALS)](/diseases/amyotrophic-lateral-sclerosis)))))))))))))
- [Frontotemporal Dementia (FTD)](/diseases/frontotemporal-dementia)))))))))))))
- [SNARE Complex](/proteins/snap25-protein)
- [Stress Granules](/mechanisms/stress-granules)
- [RNA Metabolism in Neurodegeneration](/rna-metabolism-in-neurodegeneration)
External Links
- [NCBI Gene: HNRNPA2B1](https://www.ncbi.nlm.nih.gov/gene/3181)
- [UniProt: P22626](https://www.uniprot.org/uniprot/P22626)
- [OMIM: 600124](https://www.omim.org/entry/600124)
Background
The study of Heterogeneous Nuclear Ribonucleoprotein A2 B1 (Hnrnpa2B1) 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.
Molecular Function and Mechanism
HNRNPA2B1 (Heterogeneous Nuclear Ribonucleoprotein A2/B1) is a member of the hnRNP A/B family of RNA-binding proteins. These proteins are involved in various aspects of RNA metabolism including pre-mRNA processing, mRNA splicing, stability, localization, and transport. HNRNPA2B1 is particularly important in neuronal RNA processing and has been strongly implicated in neurodegenerative diseases.
Key molecular functions include:
HNRNPA2B1 is ubiquitously expressed with highest levels in:
- Brain tissue (neurons and glia)
- Skeletal muscle
- Lung
- L
In the nervous system, H-- Hippocampal pyramidal cells
- Cerebellar Purkinje cells
- Motor neurons of the spinal cord
- Astrocytes and microglia
The protein localizes to both nuclear and cytoplasmic compartments, with dynamic shuttling between these compartments depending on cellular conditions.
Disease Associations
Amyotrophic Lateral Sclerosis (ALS)
HNRNPA2B1 is one of the most frequently mutated RNA-binding proteins in ALS and frontotemporal dementia (FTD):
- Disease-Causing Mutations: Dominant missense mutations in HNRNPA2B1 (e.g., p.D262V, p.p.G295R) were identified in families with ALS and FTD. These mutations alter RNA binding affinity and splicing regulation.
- Loss of Function: Disease mutations lead to reduced splicing regulation of target transcripts, particularly those involved in neuronal survival.
- Stress Granule Pathology: Mutant HNRNPA2B1 forms abnormal stress granules that persist in cells, leading to disruption of RNA metabolism and proteostasis.
- Interaction with Other ALS Proteins: HNRNPA2B1 interacts with TDP-43, FUS, and ataxin-2 in RNA granules. Dysregulation of these interactions contributes to disease pathogenesis.
Inclusion Body Myopathy with Paget Disease of Bone and Frontotemporal Dementia (IBMPFD/ALS)
- HNRNPA2B1 mutations cause a multisystem disorder characterized by:
- Inclusion body myopathy (muscle weakness)
- Paget disease of bone (increased bone turnover)
- Frontotemporal dementia
- ALS in some cases
Multiple System Atrophy (MSA)
- Altered HNRNPA2B1 expression and splicing have been reported in MSA brain tissue
- May contribute to oligodendrocyte dysfunction and demyelination
Alzheimer's Disease
- HNRNPA2B1 regulates APP and BACE1 mRNA splicing
- Altered splicing patterns observed in AD brain
- May influence amyloid-beta production
Therapeutic Implications
Targeting HNRNPA2B1 for therapeutic benefit:
- Knockdown mutant HNRNPA2B1 alleles
- Correct aberrant splicing patterns
- Restore normal mRNA processing
- Modulate stress granule dynamics
- Restore normal RNA binding function
- Reduce toxic aggregation
Interac
HNRNPA2B1 participates in multiple cellular pathways:
- RNA Processing: Part of the spliceosome complex, regulates alternative splicing
- Stress R- Signal Transduction**: Modulates MAPK and PI3K/AKT signaling
Key protein interactions:
- TDP-43 (TARDBP)
- FUS (Fused in Sarcoma)
- Ataxin-2 (ATXN2)
- G3BP1 (Ras-GAP SH3-domain Binding Protein 1)
- PABPC1 (Poly(A) Binding Protein Cytoplasmic 1)
See Also
- [HNRNPA2B1 Protein](/proteins/HNRNPA2B1)
- [ALS Genetics](/diseases/amyotrophic-lateral-sclerosis)
- [Frontotemporal Dementia](/diseases/frontotemporal-dementia)
- [RNA Metabolism in Neurodegeneration](/diseases/neurodegeneration)
- Stress Granules Pathway
- TDP-43 Pathway
References
[@barall]: Barall[
[@guo]: Guo L, Shorter J. Biology and pathobiology of prion-like domain proteins in neurodegeneration. Nat Med.
External Links
- [NCBI Gene: HNRNPA2B1](https://www.ncbi.nlm.nih.gov/gene/3181)
- [OMIM: HNRNPA2B1](https://www.omi
From the [SciDEX Exchange](/exchange) — scored by multi-agent debate
- [Axonal RNA Transport Reconstitution](/hypothesis/h-8196b893) — <span style="color:#ffd54f;font-weight:600">0.45</span> · Target: HNRNPA2B1
Pathway Diagram
The following diagram shows the key molecular relationships involving Heterogeneous Nuclear Ribonucleoprotein A2/B1 (HNRNPA2B1) discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)