The Biotinidase Gene Variants Registry: A Paradigm Public Database

Area of Science:

• Genetics
• Biochemistry
• Medical Informatics

Background:

• Biotinidase deficiency is an inherited metabolic disorder affecting biotin recycling.
• It results from mutations in the BTD gene, impacting biotin-dependent carboxylases and causing health issues.
• Approximately 1 in 60,000 newborns are affected, necessitating efficient diagnostic tools.

Purpose of the Study:

• To develop a comprehensive database of known mutations and sequence variants in the BTD gene.
• To facilitate genotype-phenotype correlation for biotinidase deficiency.
• To provide a centralized resource for researchers and clinicians studying this disorder.

Main Methods:

• Collected and verified over 165 reported mutations in the BTD gene.
• Standardized variant nomenclature using Human Genome Variation Society (HGVS) guidelines.
• Incorporated protein change, pathogenicity predictions, clinical observations, and published phenotypes.

Main Results:

• Developed a publicly accessible database detailing BTD gene variants and their clinical significance.
• The database includes information on mutation type, predicted impact, and genotype-phenotype correlations.
• Features include disease information, links, reference sequences, and query capabilities.

Conclusions:

• The BTD gene mutation database serves as a valuable tool for understanding biotinidase deficiency.
• It aids in mutation analysis, result interpretation, and the diagnosis of affected individuals.
• This database model can be applied to other inherited metabolic disorders.