rs74315331
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PS3_SupportingPP1_ModeratePM2_Supporting
This summary comes from the ClinGen Evidence Repository: The c.1430T>G variant in MYOC is a missense variant predicted to cause substitution of Isoleucine by Serine at amino acid 477 (p.Ile477Ser). 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 = 0.646, 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. A previous study (PMID:10545602) demonstrated that the Ile477Ser protein had increased insolubility levels compared to wild type myocilin protein and met the OddsPath threshold for PS3_Supporting (> 2.1), indicating that this variant did impact protein function. 20 segregations in 1 family, with juvenile or primary open angle glaucoma (JOAG or POAG), have been reported (PMIDs: 9328473), which fulfilled PP1_Moderate (≥5 meioses in ≥1 family, but not the ≥7 meioses in >1 family for the strong criterion). Only 1 proband with JOAG had been reported (PMID:9328473), not meeting the ≥ 2 probands threshold required to meet PS4_Supporting. In summary, this variant met the criteria to receive a score of 4 and to be classified as a variant of uncertain significance (uncertain significance classification range -1 to 5) for juvenile open angle glaucoma based on the ACMG/AMP criteria met, as specified by the ClinGen Glaucoma VCEP (v1, 12 Oct 2021): PP1_Moderate, PS3_Supporting, PM2_Supporting LINK:https://erepo.genome.network/evrepo/ui/classification/CA119174/MONDO:0020367/019
Frequency
Consequence
NM_000261.2 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 4 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
MYOC | NM_000261.2 | c.1430T>G | p.Ile477Ser | missense_variant | 3/3 | ENST00000037502.11 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
MYOC | ENST00000037502.11 | c.1430T>G | p.Ile477Ser | missense_variant | 3/3 | 1 | NM_000261.2 | P1 | |
MYOCOS | ENST00000637303.1 | c.235-2620A>C | intron_variant | 5 | A2 | ||||
MYOC | ENST00000638471.1 | c.*768T>G | 3_prime_UTR_variant, NMD_transcript_variant | 4/4 | 5 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD4 exome Cov.: 31
GnomAD4 genome ? Cov.: 32
ClinVar
Submissions by phenotype
Glaucoma 1, open angle, A Pathogenic:1
Pathogenic, no assertion criteria provided | literature only | OMIM | Nov 01, 1997 | - - |
Glaucoma of childhood Uncertain:1
Uncertain significance, reviewed by expert panel | curation | ClinGen Glaucoma Variant Curation Expert Panel | May 09, 2022 | The c.1430T>G variant in MYOC is a missense variant predicted to cause substitution of Isoleucine by Serine at amino acid 477 (p.Ile477Ser). 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 = 0.646, 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. A previous study (PMID: 10545602) demonstrated that the Ile477Ser protein had increased insolubility levels compared to wild type myocilin protein and met the OddsPath threshold for PS3_Supporting (> 2.1), indicating that this variant did impact protein function. 20 segregations in 1 family, with juvenile or primary open angle glaucoma (JOAG or POAG), have been reported (PMIDs: 9328473), which fulfilled PP1_Moderate (>=5 meioses in >=1 family, but not the >=7 meioses in >1 family for the strong criterion). Only 1 proband with JOAG had been reported (PMID: 9328473), not meeting the >= 2 probands threshold required to meet PS4_Supporting. In summary, this variant met the criteria to receive a score of 4 and to be classified as a variant of uncertain significance (uncertain significance classification range -1 to 5) for juvenile open angle glaucoma based on the ACMG/AMP criteria met, as specified by the ClinGen Glaucoma VCEP (v1, 12 Oct 2021): PP1_Moderate, PS3_Supporting, PM2_Supporting - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at