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Updated: Jun 17, 2026
05:51
A Strategy to Identify de Novo Mutations in Common Disorders such as Autism and Schizophrenia
Published on: June 15, 2011
Copy number and sequence variants implicate APBA2 as an autism candidate gene.
Timothy D Babatz1, Ravinesh A Kumar, Jyotsna Sudi
1Department of Human Genetics, University of Chicago, Chicago, Illinois 60637-5415, USA.
Summary
Amyloid precursor protein-binding protein A2 (APBA2) gene mutations may play a role in rare autism spectrum disorder (ASD) cases. This study identified novel APBA2 variants in individuals with ASD, suggesting its involvement in neurodevelopmental conditions.
Area of Science:
- Genetics
- Neuroscience
- Developmental Biology
Background:
- Autism spectrum disorder (ASD) is a complex neurodevelopmental condition with a strong genetic component.
- Microduplications in the 15q11-q13 region are a known cause of autism.
- The APBA2 gene, located in the 15q13.1 region, encodes a neuronal protein crucial for synaptic function.
Purpose of the Study:
- To investigate the role of the APBA2 gene in autism spectrum disorder.
- To identify novel genetic variants in APBA2 associated with ASD.
- To explore the inheritance patterns of APBA2 mutations in families with ASD.
Main Methods:
- Resequencing of the APBA2 gene in 512 individuals with ASD and 463 controls.
- Analysis of variant pathogenicity using computational predictions and conservation across species.
- Segregation analysis of identified variants within families.
Main Results:
- Seven novel nonsynonymous coding variants in APBA2 were identified in ASD subjects, compared to four in controls.
- Five of these variants were predicted to impact protein function or conserved residues.
- Compound heterozygous mutations in APBA2 were found in siblings with autism, inherited from unaffected parents.
Conclusions:
- Mutations in the APBA2 gene are implicated in a subset of rare autism spectrum disorder cases.
- The findings suggest that APBA2 plays a role in synaptic function and neurodevelopment.
- Further research is warranted to elucidate the full spectrum of APBA2 involvement in ASD.
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