chr9-131519447-C-G

Variant names:

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_001077365.2(POMT1):c.1545C>G(p.Ser515Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00116 in 1,551,390 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0012 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0012 ( 2 hom. )

Consequence

POMT1
NM_001077365.2 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:12

Conservation

PhyloP100: 1.25

Variant links:

Genes affected

POMT1 (HGNC:9202): (protein O-mannosyltransferase 1) The protein encoded by this gene is an O-mannosyltransferase that requires interaction with the product of the POMT2 gene for enzymatic function. The encoded protein is found in the membrane of the endoplasmic reticulum. Defects in this gene are a cause of Walker-Warburg syndrome (WWS) and limb-girdle muscular dystrophy type 2K (LGMD2K). Several transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Oct 2008]

POMT1 links:

ENSG00000230289 (HGNC:):

ENSG00000230289 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.015325069).

BP6

Variant 9-131519447-C-G is Benign according to our data. Variant chr9-131519447-C-G is described in ClinVar as [Likely_benign]. Clinvar id is 162591.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr9-131519447-C-G is described in Lovd as [Pathogenic]. Variant chr9-131519447-C-G is described in Lovd as [Likely_benign]. Variant chr9-131519447-C-G is described in Lovd as [Benign].

BS1

Variant frequency is greater than expected in population mid. gnomad4_exome allele frequency = 0.00116 (1620/1399116) while in subpopulation MID AF= 0.0209 (119/5700). AF 95% confidence interval is 0.0178. There are 2 homozygotes in gnomad4_exome. There are 811 alleles in male gnomad4_exome subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
POMT1	NM_001077365.2 link	c.1545C>G	p.Ser515Arg	missense_variant	Exon 16 of 20	ENST00000402686.8	NP_001070833.1	Q9Y6A1-2A0A140VKE0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
POMT1	ENST00000402686.8 link	c.1545C>G	p.Ser515Arg	missense_variant	Exon 16 of 20	1	NM_001077365.2	ENSP00000385797.4		Q9Y6A1-2

Frequencies

GnomAD3 genomes

AF:

0.00120

AC:

183

AN:

152156

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000386

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00282

Gnomad ASJ

AF:

0.00375

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000622

Gnomad FIN

AF:

0.000848

Gnomad MID

AF:

0.00949

Gnomad NFE

AF:

0.00126

Gnomad OTH

AF:

0.00478

GnomAD3 exomes

AF:

0.00163

AC:

254

AN:

155618

Hom.:

AF XY:

0.00164

AC XY:

134

AN XY:

81892

show subpopulations

Gnomad AFR exome

AF:

0.000341

Gnomad AMR exome

AF:

0.00323

Gnomad ASJ exome

AF:

0.00329

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000921

Gnomad FIN exome

AF:

0.000536

Gnomad NFE exome

AF:

0.00168

Gnomad OTH exome

AF:

0.00294

GnomAD4 exome

AF:

0.00116

AC:

1620

AN:

1399116

Hom.:

Cov.:

AF XY:

0.00118

AC XY:

811

AN XY:

690104

show subpopulations

Gnomad4 AFR exome

AF:

0.000537

Gnomad4 AMR exome

AF:

0.00328

Gnomad4 ASJ exome

AF:

0.00342

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000795

Gnomad4 FIN exome

AF:

0.000678

Gnomad4 NFE exome

AF:

0.000990

Gnomad4 OTH exome

AF:

0.00202

GnomAD4 genome

AF:

0.00120

AC:

183

AN:

152274

Hom.:

Cov.:

AF XY:

0.00117

AC XY:

AN XY:

74434

show subpopulations

Gnomad4 AFR

AF:

0.000385

Gnomad4 AMR

AF:

0.00281

Gnomad4 ASJ

AF:

0.00375

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000622

Gnomad4 FIN

AF:

0.000848

Gnomad4 NFE

AF:

0.00126

Gnomad4 OTH

AF:

0.00473

Alfa

AF:

0.00157

Hom.:

Bravo

AF:

0.00140

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.00156

AC:

ESP6500AA

AF:

0.000235

AC:

ESP6500EA

AF:

0.000968

AC:

ExAC

AF:

0.000687

AC:

Asia WGS

AF:

0.00115

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:12

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:6

Sep 17, 2015

Eurofins Ntd Llc (ga)

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Oct 30, 2017

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Feb 08, 2024

Athena Diagnostics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Sep 18, 2015

Genetic Services Laboratory, University of Chicago

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 25, 2022

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: POMT1 c.1611C>G (p.Ser537Arg) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.0016 in 155618 control chromosomes in the gnomAD database, including 1 homozygote. The observed variant frequency is approximately 2.3 fold of the estimated maximal expected allele frequency for a pathogenic variant in POMT1 causing Limb-Girdle Muscular Dystrophy, Autosomal Recessive phenotype (0.00072), strongly suggesting that the variant is benign. Although listed in the literature, to our knowledge, no penetrant association of c.1611C>G in individuals affected with Limb-Girdle Muscular Dystrophy, Autosomal Recessive and no experimental evidence demonstrating its impact on protein function have been reported. Ten clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation and a predominant consensus as benign/likely benign. Based on the evidence outlined above, the variant was classified as benign. -

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Benign:2

May 06, 2016

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jan 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

POMT1: BS1 -

Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A1

Benign:2

Mar 26, 2019

Centre for Mendelian Genomics, University Medical Centre Ljubljana

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was classified as: Benign. The following ACMG criteria were applied in classifying this variant: BS1,BS2. -

Baylor Genetics

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Autosomal recessive limb-girdle muscular dystrophy type 2K

Benign:1

May 28, 2019

Mendelics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Walker-Warburg congenital muscular dystrophy;C1836373:Autosomal recessive limb-girdle muscular dystrophy type 2K;C5436962:Muscular dystrophy-dystroglycanopathy (congenital with intellectual disability), type B1

Benign:1

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.25

BayesDel_addAF

Benign

-0.12

BayesDel_noAF

Uncertain

0.050

CADD

Benign

DANN

Benign

0.87

DEOGEN2

Benign

0.30

.;.;.;T;.;T

Eigen

Benign

-0.27

Eigen_PC

Benign

-0.16

FATHMM_MKL

Uncertain

0.87

LIST_S2

Benign

0.86

D;D;D;D;.;D

M_CAP

Uncertain

0.16

MetaRNN

Benign

0.015

T;T;T;T;T;T

MetaSVM

Benign

-0.56

MutationAssessor

Benign

1.6

.;.;.;L;.;.

PrimateAI

Benign

0.43

PROVEAN

Benign

-1.1

N;N;N;N;N;N

REVEL

Uncertain

0.51

Sift

Benign

0.18

T;T;T;T;T;T

Sift4G

Benign

0.40

T;T;T;T;T;T

Polyphen

0.0, 0.11

.;B;.;B;B;.

Vest4

0.78

MutPred

0.66

.;.;.;Gain of MoRF binding (P = 0.0199);.;.;

MVP

0.88

MPC

0.28

ClinPred

0.013

GERP RS

4.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.037

gMVP

0.47

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