rs117985576

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP6BS2

The NM_001077365.2(POMT1):c.1499G>A(p.Arg500Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00255 in 1,552,060 control chromosomes in the GnomAD database, including 17 homozygotes. In-silico tool predicts a benign outcome for this variant. 16/24 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.0017 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0026 ( 17 hom. )

Consequence

POMT1
NM_001077365.2 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:11

Conservation

PhyloP100: 1.28

Publications

9 publications found

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 Gene-Disease associations (from GenCC):

muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A1
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Ambry Genetics, Laboratory for Molecular Medicine, Genomics England PanelApp
myopathy caused by variation in POMT1
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
muscular dystrophy-dystroglycanopathy (congenital with intellectual disability), type B1
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
autosomal recessive limb-girdle muscular dystrophy type 2K
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
congenital muscular dystrophy with cerebellar involvement
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
congenital muscular dystrophy with intellectual disability
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
congenital muscular dystrophy without intellectual disability
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
muscle-eye-brain disease
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
muscular dystrophy-dystroglycanopathy, type A
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

POMT1 links:

ENSG00000230289 (HGNC:):

ENSG00000230289 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP6

Variant 9-131519401-G-A is Benign according to our data. Variant chr9-131519401-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 95459.

BS2

High Homozygotes in GnomAdExome4 at 17 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
POMT1	NM_001077365.2 link	c.1499G>A	p.Arg500Lys	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.1499G>A	p.Arg500Lys	missense_variant	Exon 16 of 20	1	NM_001077365.2	ENSP00000385797.4		Q9Y6A1-2

Frequencies

GnomAD3 genomes

AF:

0.00173

AC:

264

AN:

152186

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000410

Gnomad AMI

AF:

0.00110

Gnomad AMR

AF:

0.000981

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000622

Gnomad FIN

AF:

0.0000941

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00326

Gnomad OTH

AF:

0.00239

GnomAD2 exomes

AF:

0.00169

AC:

266

AN:

157036

AF XY:

0.00159

show subpopulations

Gnomad AFR exome

AF:

0.000560

Gnomad AMR exome

AF:

0.00178

Gnomad ASJ exome

AF:

0.000235

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00332

Gnomad OTH exome

AF:

0.00202

GnomAD4 exome

AF:

0.00264

AC:

3696

AN:

1399756

Hom.:

Cov.:

AF XY:

0.00252

AC XY:

1743

AN XY:

690428

show subpopulations

African (AFR)

AF:

0.000536

AC:

AN:

31698

American (AMR)

AF:

0.00176

AC:

AN:

35714

Ashkenazi Jewish (ASJ)

AF:

0.0000397

AC:

AN:

25182

East Asian (EAS)

AF:

0.0000278

AC:

AN:

35948

South Asian (SAS)

AF:

0.000252

AC:

AN:

79268

European-Finnish (FIN)

AF:

0.000163

AC:

AN:

48984

Middle Eastern (MID)

AF:

0.000351

AC:

AN:

5700

European-Non Finnish (NFE)

AF:

0.00321

AC:

3462

AN:

1079204

Other (OTH)

AF:

0.00210

AC:

122

AN:

58058

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.467

Heterozygous variant carriers

190

380

570

760

950

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

136

272

408

544

680

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00173

AC:

264

AN:

152304

Hom.:

Cov.:

AF XY:

0.00167

AC XY:

124

AN XY:

74474

show subpopulations

African (AFR)

AF:

0.000409

AC:

AN:

41564

American (AMR)

AF:

0.000980

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.000622

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.0000941

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00326

AC:

222

AN:

68036

Other (OTH)

AF:

0.00237

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.498

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00277

Hom.:

Bravo

AF:

0.00192

TwinsUK

AF:

0.00324

AC:

ALSPAC

AF:

0.00389

AC:

ESP6500AA

AF:

0.000469

AC:

ESP6500EA

AF:

0.00132

AC:

ExAC

AF:

0.000432

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:6Benign:11

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:2Benign:5

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Jul 26, 2021

Mayo Clinic Laboratories, Mayo Clinic

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

May 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

POMT1: BP4 -

Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Aug 19, 2016

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

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Genome Diagnostics Laboratory, University Medical Center Utrecht

Significance:Likely benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Oct 26, 2020

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is associated with the following publications: (PMID: 18647264, 16575835, 17878207) -

not specified

Uncertain:1Benign:4

Nov 04, 2015

Eurofins Ntd Llc (ga)

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Apr 23, 2021

Athena Diagnostics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

PreventionGenetics, part of Exact Sciences

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jun 02, 2015

Genetic Services Laboratory, University of Chicago

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Autosomal recessive limb-girdle muscular dystrophy type 2K;C4284790:Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A1;C5436962:Muscular dystrophy-dystroglycanopathy (congenital with intellectual disability), type B1

Uncertain:1

May 23, 2017

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Intellectual disability

Uncertain:1

Jan 01, 2019

Centre de Biologie Pathologie Génétique, Centre Hospitalier Universitaire de Lille

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

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

Uncertain:1

Mar 07, 2019

Baylor Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

Autosomal recessive limb-girdle muscular dystrophy type 2K

Benign:1

Apr 27, 2017

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to determine this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

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 28, 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

0.059

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.43

CADD

Benign

7.8

(source)

DANN

Benign

0.86

DEOGEN2

Benign

0.12

.;.;.;T;.;T

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.1

FATHMM_MKL

Benign

0.28

LIST_S2

Benign

0.65

T;T;T;T;.;T

M_CAP

Benign

0.056

MetaRNN

Benign

0.0050

T;T;T;T;T;T

MetaSVM

Benign

-0.69

MutationAssessor

Benign

-0.53

.;.;.;N;.;.

PhyloP100

1.3

PrimateAI

Benign

0.28

PROVEAN

Benign

0.99

N;N;N;N;N;N

REVEL

Benign

0.15

Sift

Benign

1.0

T;T;T;T;T;T

Sift4G

Benign

1.0

T;T;T;T;T;T

Polyphen

0.0

.;B;.;B;B;.

Vest4

0.21

MVP

0.43

MPC

0.25

ClinPred

0.0029

GERP RS

-4.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.026

gMVP

0.22

Mutation Taster

=91/9

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.24

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.24

Position offset: -7

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over