1-171635976-G-A

Position:

chr1-171635976-G-A

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS1

This summary comes from the ClinGen Evidence Repository: The c.1464C>T variant in MYOC is a synonymous variant (p.Ala488=). The highest minor allele frequency of this variant was in the East Asian population of gnomAD (v2.1.1) = 0.001253, which met the ≥ 0.001 threshold set for BS1 (25 alleles out of 19,950), meeting the threshold of ≥ 5 of at least 2,000 observed alleles). Although this synonymous variant was not predicted to affect splicing, as assessed with SpliceAI (≤ 0.2), it had a CADD score (v1.6) = 10.96, which did not meet the ≤ 10 threshold for BP4 and a GERP score = 2.87 (threshold < 0), not meeting BP7 and indicating conservation at this site. There was no functional evidence predicting a damaging or benign impact of this variant on MYOC function. As BS1 was met, PP1 did not apply and segregations were not counted. Although probands with primary open angle glaucoma have been reported carrying this variant, PM2_Supporting was not met, therefore PS4 did not apply. In summary, this variant met the criteria to receive a score of -4 and to be classified as likely benign (likely benign classification range -2 to -6) for primary open angle glaucoma based on the ACMG/AMP criteria met, as specified by the ClinGen Glaucoma VCEP (v1, 12 Oct 2021): BS1. LINK:https://erepo.genome.network/evrepo/ui/classification/CA1244015/MONDO:0007665/019

Frequency

Genomes: 𝑓 0.00015 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00013 ( 0 hom. )

Consequence

MYOC
NM_000261.2 synonymous

Scores

Clinical Significance

Likely benign reviewed by expert panel B:1

Conservation

PhyloP100: 0.580

Variant links:

Genes affected

MYOC (HGNC:7610): (myocilin) MYOC encodes the protein myocilin, which is believed to have a role in cytoskeletal function. MYOC is expressed in many occular tissues, including the trabecular meshwork, and was revealed to be the trabecular meshwork glucocorticoid-inducible response protein (TIGR). The trabecular meshwork is a specialized eye tissue essential in regulating intraocular pressure, and mutations in MYOC have been identified as the cause of hereditary juvenile-onset open-angle glaucoma. [provided by RefSeq, Jul 2008]

MYOC links:

MYOCOS (HGNC:53429): (myocilin opposite strand)

MYOCOS links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BS1

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MYOC	NM_000261.2 linkuse as main transcript	c.1464C>T	p.Ala488=	synonymous_variant	3/3	ENST00000037502.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
MYOC	ENST00000037502.11 linkuse as main transcript	c.1464C>T	p.Ala488=	synonymous_variant	3/3	1	NM_000261.2	P1
MYOCOS	ENST00000637303.1 linkuse as main transcript	c.235-2654G>A		intron_variant		5		A2
MYOC	ENST00000638471.1 linkuse as main transcript	c.*802C>T		3_prime_UTR_variant, NMD_transcript_variant	4/4	5

Frequencies

GnomAD3 genomes

AF:

0.000138

AC:

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000589

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000103

AC:

AN:

251406

Hom.:

AF XY:

0.0000957

AC XY:

AN XY:

135880

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00131

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000132

AC:

193

AN:

1461886

Hom.:

Cov.:

AF XY:

0.000124

AC XY:

AN XY:

727242

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00423

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.000397

GnomAD4 genome

AF:

0.000151

AC:

AN:

152256

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74456

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000588

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00142

Alfa

AF:

0.0000868

Hom.:

Bravo

AF:

0.0000718

Asia WGS

AF:

0.00606

AC:

AN:

3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Open-angle glaucoma

Benign:1

Likely benign, reviewed by expert panel

curation

ClinGen Glaucoma Variant Curation Expert Panel

May 02, 2023

The c.1464C>T variant in MYOC is a synonymous variant (p.Ala488=). The highest minor allele frequency of this variant was in the East Asian population of gnomAD (v2.1.1) = 0.001253, which met the >=0.001 threshold set for BS1 (25 alleles out of 19,950), meeting the threshold of >=5 of at least 2,000 observed alleles). Although this synonymous variant was not predicted to affect splicing, as assessed with SpliceAI (<=0.2), it had a CADD score (v1.6) = 10.96, which did not meet the <=10 threshold for BP4 and a GERP score = 2.87 (threshold < 0), not meeting BP7 and indicating conservation at this site. There was no functional evidence predicting a damaging or benign impact of this variant on MYOC function. As BS1 was met, PP1 did not apply and segregations were not counted. Although probands with primary open angle glaucoma have been reported carrying this variant, PM2_Supporting was not met, therefore PS4 did not apply. In summary, this variant met the criteria to receive a score of -4 and to be classified as likely benign (likely benign classification range -2 to -6) for primary open angle glaucoma based on the ACMG/AMP criteria met, as specified by the ClinGen Glaucoma VCEP (v1, 12 Oct 2021): BS1. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.56

CADD

Benign

8.5

DANN

Benign

0.68

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over