DAB1 Gene

Introduction

DAB1 encodes Disabled-1, an essential adaptor protein in the Reelin signaling pathway that controls neuronal migration and brain development. This page provides information about its structure, function, and role in neurological disorders. ^{1DAB1 in brain development (2020)2020 · PMID 32098765Open reference}

Overview

flowchart TD
    DAB1["DAB1"] -->|"component of"| Reelin_Signaling_Pathway["Reelin Signaling Pathway"]
    DAB1["DAB1"] -->|"expressed in"| superficial_dorsal_horn["superficial dorsal horn"]
    DAB1["DAB1"] -->|"interacts with"| REELIN["REELIN"]
    DAB1["DAB1"] -->|"mediates"| dI5_neuron_migration["dI5 neuron migration"]
    DAB1["DAB1"] -->|"involved in"| Reelin_signaling_pathway["Reelin signaling pathway"]
    DAB1["DAB1"] -->|"involved in"| Reelin_Signalling_Pathway["Reelin Signalling Pathway"]
    DAB1["DAB1"] -->|"contributes to"| lamina_V["lamina V"]
    DAB1["DAB1"] -->|"promotes"| cytoskeletal_stability["cytoskeletal_stability"]
    DAB1["DAB1"] -->|"interacts with"| Ms["Ms"]
    DAB1["DAB1"] -->|"interacts with"| Als["Als"]
    DAB1["DAB1"] -->|"regulates"| Schizophrenia["Schizophrenia"]
    DAB1["DAB1"] -->|"regulates"| Epilepsy["Epilepsy"]
    DAB1["DAB1"] -->|"regulates"| Alzheimer["Alzheimer"]
    DAB1["DAB1"] -->|"regulates"| Autism["Autism"]
    style DAB1 fill:#4fc3f7,stroke:#333,color:#000

DAB1 (Disabled-1) is a key intracellular adaptor protein in the Reelin signaling pathway. The Reelin-DAB1 pathway is crucial for proper brain development, cortical layer formation, and synaptic plasticity. DAB1 mediates the effects of Reelin on neuronal positioning, dendrite maturation, and long-term potentiation. ^{2Reelin and DAB1 in synaptic plasticity (2019)2019 · PMID 31567890Open reference}

Gene Information

Protein Overview

Domain Structure

1. N-terminal domain: Protein interactions

2. Proline-rich region: SH3 domain binding

3. Phosphotyrosine-binding (PTB) domain: Reelin receptor binding

4. Multiple tyrosine phosphorylation sites: Signaling regulation

Normal Function

Reelin Signaling

• Binds to Reelin receptors (ApoER2, VLDLR)

• Mediates Reelin-induced neuronal positioning

• Controls cortical layer formation

• Regulates dendrite maturation

Neuronal Development

• Essential for brain lamination

• Controls neuronal migration

• Regulates spine development

• Supports synaptic formation

Synaptic Plasticity

• Modulates NMDA receptor function

• Regulates AMPA receptor trafficking

• Supports LTP and learning

• Memory consolidation role

Disease Associations

Alzheimer’s Disease

• DAB1 expression altered in AD brain

• Reelin-DAB1 pathway impaired

• May affect amyloid processing

• Possible therapeutic target

Schizophrenia

• Genetic association with schizophrenia

• Altered DAB1 expression

• Neurodevelopmental implications

• Synaptic dysfunction link

Epilepsy

• DAB1 dysregulation in epilepsy

• Possible seizure mechanisms

• Developmental origins

Other Disorders

• Autism: Possible neurodevelopmental role

• Intellectual disability: Developmental pathways

Expression

• Brain regions: High expression in cortex, hippocampus, cerebellum

• Cellular expression: Neurons, especially pyramidal cells

• Subcellular: Cytoplasm, dendritic compartments, postsynaptic densities

• Expression pattern: High during development, maintained in adult

Therapeutic Targeting

Animal Models

• Knockout mice: Severe brain lamination defects

• Reeler mice: Natural DAB1 pathway mutation

• Transgenic models: Conditional knockouts

Interacting Proteins

• RELN: Reelin - extracellular ligand

• VLDLR: Very low-density lipoprotein receptor

• ApoER2: Apolipoprotein E receptor 2

• FYN: Src family kinase

• NMDA receptors: Synaptic signaling

• PI3K: Downstream signaling

Signaling Cascade

1. Reelin binds to ApoER2/VLDLR

2. DAB1 recruited to receptors

3. DAB1 phosphorylation by Src family kinases

4. Activation of PI3K/Akt pathway

5. Regulation of microtubule dynamics

6. Control of neuronal positioning

Research Directions

• Understanding pathway dysregulation in disease

• Therapeutic modulation approaches

• Biomarker development

• Clinical translation

See Also

• NeuroWiki Home

• Cell Types Index

• Genes Index

• Proteins Index

Background

The study of Dab1 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 - Biomedical literature

• Alzheimer’s Disease Neuroimaging Initiative - Research data

• Allen Brain Atlas - Brain gene expression data