Table 1.

Molecular Genetic Testing Used in GRIA2-Related Neurodevelopmental Disorder

Gene 1MethodProportion of Pathogenic Variants 2, 3 Identified by Method
GRIA2 Sequence analysis 430/33 5
Gene-targeted deletion/duplication analysis 63/33 5
1.

See Table A. Genes and Databases for chromosome locus and protein.

2.

See Molecular Genetics for information on variants detected in this gene.

3.

Three individuals with contiguous gene deletions (not included in this table) have also been reported [Salpietro et al 2019] (see Genetically Related Disorders).

4.

Sequence analysis detects variants that are benign, likely benign, of uncertain significance, likely pathogenic, or pathogenic. Variants may include missense, nonsense, and splice site variants and small intragenic deletions/insertions; typically, exon or whole-gene deletions/duplications are not detected. For issues to consider in interpretation of sequence analysis results, click here.

5.

Salpietro et al [2019], Alkelai et al [2021], Zhou et al [2021], Cai et al [2022], Coombs et al [2022], Latsko et al [2022], and data derived from the subscription-based professional view of Human Gene Mutation Database [Stenson et al 2020]

6.

Gene-targeted deletion/duplication analysis detects intragenic deletions or duplications. Methods used may include a range of techniques such as quantitative PCR, long-range PCR, multiplex ligation-dependent probe amplification (MLPA), and a gene-targeted microarray designed to detect single-exon deletions or duplications. Exome and genome sequencing may be able to detect deletions/duplications using breakpoint detection or read depth; however, sensitivity can be lower than that of gene-targeted deletion/duplication analysis.

From: GRIA2-Related Neurodevelopmental Disorder

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