Classification rationale
PVS1PM2
Likely Pathogenic
ZRSR2 c.376C>T
The ZRSR2 c.376C>T (p.Arg126Ter) variant has been observed in somatic cancers in COSMIC (COSV57066630, n=5) and has not been reported in ClinVar.1 This variant is absent from gnomAD v2.1 and gnomAD v4.1, with an observed population frequency of 0 that is below the 0.1% PM2 rarity threshold.2 This is an early truncating variant in exon 5 of 11, predicted to create p.Arg126Ter at codon 126 of 483, and available gene-level literature supports loss of function as a disease mechanism for ZRSR2.3 SpliceAI predicts no significant splice impact for this variant, with a maximum delta score of 0.10.4
PVS1 + PM2
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Likely Pathogenic