The SCN1A variant database: a novel research and diagnostic tool

Area of Science:

• Neuroscience
• Genetics
• Bioinformatics

Background:

• The SCN1A gene encodes the neuronal voltage-gated sodium channel Na(v)1.1, essential for action potential propagation in the central nervous system.
• Mutations in SCN1A are linked to neurological disorders such as epilepsy and migraine due to altered neuronal excitability.

Purpose of the Study:

• To create a comprehensive, publicly accessible online database of all reported sequence variants in the SCN1A gene.
• To facilitate the interpretation of novel SCN1A variants and enhance understanding of genotype-phenotype correlations.

Main Methods:

• Systematic collection and verification of SCN1A sequence variants from reported literature.
• Standardized nomenclature for variant description and classification based on putative pathogenicity.
• Development of a queryable online database with links to publications and phenotypic information.

Main Results:

• A database containing 623 distinct SCN1A sequence variants was established.
• Variants are classified by pathogenicity and linked to associated phenotypes and publications.
• The database allows querying by various parameters including position, phenotype, variant type, and publication.

Conclusions:

• The SCN1A variant database provides a centralized resource for researchers and clinicians.
• It aids in the interpretation of SCN1A mutations and improves insights into epilepsy and migraine pathogenesis.
• This resource supports the ongoing discovery of SCN1A-related genotype-phenotype relationships.