ClinVar

Description

The c.1105T>C variant in MYOC is a missense variant predicted to cause substitution of Phenylalanine by Leucine at amino acid 369 (p.Phe369Leu). This variant was not found in any population of gnomAD (v2.1.1), meeting the <= 0.0001 threshold set for PM2_Supporting in a population of at least 10,000 alleles. The REVEL score = 0.872, which met the >= 0.7 threshold for PP3, predicting a damaging effect on MYOC function. There was no functional evidence predicting a damaging or benign impact of this variant on MYOC function. Only 2 segregations had been reported for primary open angle glaucoma (PMIDs: 28564705, 15534471), not meeting the >= 3 segregations required for PP1. 2 probands with POAG have been reported carrying this variant (PMIDs: 15534471, 28564705), which met PS4_Supporting (>= 2 probands). In summary, this variant met the criteria to receive a score of 3 and to be classified as a variant of uncertain significance (uncertain significance classification range -1 to 5) for primary open angle glaucoma based on the ACMG/AMP criteria met, as specified by the ClinGen Glaucoma VCEP (v1, 12 Oct 2021): PP3, PS4_Supporting, PM2_Supporting