Variant: NM_000261.2(MYOC):c.992C>T (p.Ser331Leu)

CA1244102

293710 (ClinVar)

Gene: MYOC

Condition: primary open angle glaucoma

Inheritance Mode: Autosomal dominant inheritance

UUID: c0aab549-271f-4775-b24b-ad8f2ba952dc

HGVS expressions

NM_000261.2:c.992C>T
NM_000261.2(MYOC):c.992C>T (p.Ser331Leu)
NC_000001.11:g.171636448G>A
CM000663.2:g.171636448G>A
NC_000001.10:g.171605588G>A
CM000663.1:g.171605588G>A
NC_000001.9:g.169872211G>A
NG_008859.1:g.21186C>T
ENST00000037502.11:c.992C>T
ENST00000637303.1:c.235-2182G>A
ENST00000638471.1:c.*330C>T
ENST00000037502.10:c.992C>T
ENST00000614688.1:c.992C>T
NM_000261.1:c.992C>T

Uncertain Significance

• Not Met criteria codes: PM6 PM2 PM5 PM4 BS3 BS1 BP7 BP4 PS2 PS1 PS3 PS4 BA1 PP1 PP3

Expert Panel

Glaucoma VCEP

Criteria Specification Information

Evidence submitted by expert panel

Glaucoma VCEP

The c.992C>T variant in MYOC is a missense variant predicted to cause substitution of Serine by Leucine at amino acid 331 (p.Ser331Leu). The highest minor allele frequency of this variant was in the South Asian population of gnomAD (v2.1.1) = 0.0002940 (9 alleles out of 30,610), which did not meet the PM2_Supporting allele frequency threshold (≤ 0.0001) or the BS1 allele frequency threshold (≥ 0.001). The REVEL score = 0.543, which was neither above nor below the thresholds for PP3 (≥ 0.7) or BP4 (≤ 0.15), predicting a damaging or benign impact on MYOC function. There was no functional evidence predicting a damaging or benign impact of this variant on MYOC function. Although a proband with primary open angle glaucoma had been reported carrying this variant, PM2_Supporting was not met, therefore PS4 did not apply. In summary, this variant did not meet any criteria, receiving a score of 0 and a classification 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): none

Not Met criteria codes

• PM6: This variant has not been identified de novo.
• PM2: The highest minor allele frequency of this variant was in the South Asian population of gnomAD (v2.1.1) = 0.0002940 (9 alleles out of 30,610), which did not meet the ≤ 0.0001 threshold set for PM2_Supporting.
• PM5: PM5_Supporting could not be applied to this variant as the other missense variant at the same amino acid residue (c.991T>A, p.Ser331Thr, PMID: 17417611) was not classified as likely pathogenic or pathogenic.
• PM4: This variant does not cause a protein length change.
• BS3: No functional evidence has been found for this variant.
• BS1: The highest minor allele frequency of this variant was in the South Asian population of gnomAD (v2.1.1) = 0.0002940 (9 alleles out of 30,610), which did not meet the ≥ 0.001 threshold set for BS1.
• BP7: This is not a synonymous or non-coding variant.
• BP4: The REVEL score = 0.543, which did not meet the ≤ 0.15 threshold required for BP4.
• PS2: This variant has not been identified de novo.
• PS1: An established pathogenic variant causing this same amino acid change has not been identified.
• PS3: No functional evidence has been found for this variant.
• PS4: Although a proband with POAG had been reported carrying this variant, PM2_Supporting was not met, therefore PS4 did not apply.
• BA1: This variant did not meet the ≥ 0.01 minor allele frequency threshold in gnomAD (v2.1.1).
• PP1: No segregations have been reported for this variant.
• PP3: The REVEL score = 0.543, which did not meet the ≥ 0.7 threshold for PP3.

Approved on: 2023-06-01

Published on: 2023-06-01