1-171635941-T-C

Position:

chr1-171635941-T-C

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.1499A>G variant in MYOC is a missense variant predicted to cause substitution of Lysine by Arginine at amino acid 500 (p.Lys500Arg). The highest minor allele frequency of this variant was in the African/African American population of gnomAD (v2.1.1) = 0.006331, which meets the ≥0.001 threshold set for this criterion (158 alleles out of 24,958, meeting the threshold of ≥ 5 of at least 2,000 observed alleles). The REVEL score = 0.502, 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 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/CA1244011/MONDO:0007665/019

Frequency

Genomes: 𝑓 0.0018 ( 1 hom., cov: 32)

Exomes 𝑓: 0.00015 ( 2 hom. )

Consequence

MYOC
NM_000261.2 missense

Scores

Clinical Significance

Likely benign reviewed by expert panel B:3

Conservation

PhyloP100: 0.415

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:

Genome browser will be placed here

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.1499A>G	p.Lys500Arg	missense_variant	3/3	ENST00000037502.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
MYOC	ENST00000037502.11 linkuse as main transcript	c.1499A>G	p.Lys500Arg	missense_variant	3/3	1	NM_000261.2	P1
MYOCOS	ENST00000637303.1 linkuse as main transcript	c.235-2689T>C		intron_variant		5		A2
MYOC	ENST00000638471.1 linkuse as main transcript	c.*837A>G		3_prime_UTR_variant, NMD_transcript_variant	4/4	5

Frequencies

GnomAD3 genomes

AF:

0.00172

AC:

262

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00594

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000524

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00335

GnomAD3 exomes

AF:

0.000462

AC:

116

AN:

251338

Hom.:

AF XY:

0.000294

AC XY:

AN XY:

135838

show subpopulations

Gnomad AFR exome

AF:

0.00701

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000151

AC:

221

AN:

1461858

Hom.:

Cov.:

AF XY:

0.000139

AC XY:

101

AN XY:

727238

show subpopulations

Gnomad4 AFR exome

AF:

0.00553

Gnomad4 AMR exome

AF:

0.000157

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.000447

GnomAD4 genome

AF:

0.00175

AC:

267

AN:

152286

Hom.:

Cov.:

AF XY:

0.00172

AC XY:

128

AN XY:

74472

show subpopulations

Gnomad4 AFR

AF:

0.00604

Gnomad4 AMR

AF:

0.000523

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00331

Alfa

AF:

0.000340

Hom.:

Bravo

AF:

0.00202

ESP6500AA

AF:

0.00681

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000527

AC:

Asia WGS

AF:

0.00115

AC:

AN:

3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:3

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

not provided

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 22, 2023

- -

MYOC-related disorder

Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 26, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Open-angle glaucoma

Benign:1

Likely benign, reviewed by expert panel

curation

ClinGen Glaucoma Variant Curation Expert Panel

Jul 05, 2023

The c.1499A>G variant in MYOC is a missense variant predicted to cause substitution of Lysine by Arginine at amino acid 500 (p.Lys500Arg). The highest minor allele frequency of this variant was in the African/African American population of gnomAD (v2.1.1) = 0.006331, which meets the >=0.001 threshold set for this criterion (158 alleles out of 24,958, meeting the threshold of >= 5 of at least 2,000 observed alleles). The REVEL score = 0.502, 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 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

AlphaMissense

Benign

0.062

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.16

CADD

Benign

9.1

DANN

Benign

0.40

DEOGEN2

Benign

0.36

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.3

FATHMM_MKL

Benign

0.036

LIST_S2

Benign

0.54

M_CAP

Benign

0.039

MetaRNN

Benign

0.015

MetaSVM

Benign

-0.82

MutationAssessor

Benign

-0.57

MutationTaster

Benign

0.99

PrimateAI

Benign

0.24

PROVEAN

Benign

0.37

REVEL

Uncertain

0.50

Sift

Benign

0.91

Sift4G

Benign

1.0

Polyphen

0.0010

Vest4

0.054

MVP

0.48

MPC

0.14

ClinPred

0.0060

GERP RS

-4.5

Varity_R

0.071

gMVP

0.77

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