Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2
The NM_001142699.3(DLG2):c.2618G>A(p.Arg873Lys) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.000145 in 1,602,426 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).
DLG2 (HGNC:2901): (discs large MAGUK scaffold protein 2) This gene encodes a member of the membrane-associated guanylate kinase (MAGUK) family. The encoded protein forms a heterodimer with a related family member that may interact at postsynaptic sites to form a multimeric scaffold for the clustering of receptors, ion channels, and associated signaling proteins. Multiple transcript variants encoding different isoforms have been found for this gene. Additional transcript variants have been described, but their full-length nature is not known. [provided by RefSeq, Dec 2008]
Uncertain significance, criteria provided, single submitter
clinical testing
Ambry Genetics
Oct 17, 2023
The c.2618G>A (p.R873K) alteration is located in exon 25 (coding exon 23) of the DLG2 gene. This alteration results from a G to A substitution at nucleotide position 2618, causing the arginine (R) at amino acid position 873 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -