14-77320521-G-T

Position:

chr14-77320521-G-T

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1

The NM_013382.7(POMT2):c.161C>A(p.Ala54Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00549 in 1,554,514 control chromosomes in the GnomAD database, including 445 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Synonymous variant affecting the same amino acid position (i.e. A54A) has been classified as Benign.

Frequency

Genomes: 𝑓 0.029 ( 219 hom., cov: 32)

Exomes 𝑓: 0.0030 ( 226 hom. )

Consequence

POMT2
NM_013382.7 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:9

Conservation

PhyloP100: -0.106

Variant links:

Genes affected

POMT2 (HGNC:19743): (protein O-mannosyltransferase 2) The protein encoded by this gene is an O-mannosyltransferase that requires interaction with the product of the POMT1 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).[provided by RefSeq, Oct 2008]

POMT2 links:

POMT2 (HGNC:):

POMT2 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=0.0016682744).

BP6

Variant 14-77320521-G-T is Benign according to our data. Variant chr14-77320521-G-T is described in ClinVar as [Benign]. Clinvar id is 130016.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr14-77320521-G-T is described in Lovd as [Benign].

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0975 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
POMT2	NM_013382.7 linkuse as main transcript	c.161C>A	p.Ala54Glu	missense_variant	1/21	ENST00000261534.9	NP_037514.2	Q9UKY4-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
POMT2	ENST00000261534.9 linkuse as main transcript	c.161C>A	p.Ala54Glu	missense_variant	1/21	1	NM_013382.7	ENSP00000261534.4		Q9UKY4-1

Frequencies

GnomAD3 genomes

AF:

0.0286

AC:

4350

AN:

152150

Hom.:

219

Cov.:

show subpopulations

Gnomad AFR

AF:

0.100

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00837

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000827

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000323

Gnomad OTH

AF:

0.0210

GnomAD3 exomes

AF:

0.00678

AC:

1060

AN:

156336

Hom.:

AF XY:

0.00480

AC XY:

410

AN XY:

85394

show subpopulations

Gnomad AFR exome

AF:

0.106

Gnomad AMR exome

AF:

0.00322

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000165

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000223

Gnomad OTH exome

AF:

0.00335

GnomAD4 exome

AF:

0.00298

AC:

4173

AN:

1402246

Hom.:

226

Cov.:

AF XY:

0.00254

AC XY:

1765

AN XY:

693734

show subpopulations

Gnomad4 AFR exome

AF:

0.109

Gnomad4 AMR exome

AF:

0.00449

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000136

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000994

Gnomad4 OTH exome

AF:

0.00592

GnomAD4 genome

AF:

0.0286

AC:

4355

AN:

152268

Hom.:

219

Cov.:

AF XY:

0.0272

AC XY:

2026

AN XY:

74466

show subpopulations

Gnomad4 AFR

AF:

0.100

Gnomad4 AMR

AF:

0.00836

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000621

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000324

Gnomad4 OTH

AF:

0.0208

Alfa

AF:

0.00481

Hom.:

Bravo

AF:

0.0327

ESP6500AA

AF:

0.0878

AC:

359

ESP6500EA

AF:

0.000364

AC:

ExAC

AF:

0.00636

AC:

725

Asia WGS

AF:

0.00549

AC:

AN:

3478

ClinVar

Significance: Benign

Submissions summary: Benign:9

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:5

Likely benign, no assertion criteria provided	clinical testing	Genetic Services Laboratory, University of Chicago	-	Likely benign based on allele frequency in 1000 Genomes Project or ESP global frequency and its presence in a patient with a rare or unrelated disease phenotype. NOT Sanger confirmed. -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Dec 13, 2013	- -
Benign, criteria provided, single submitter	curation	SIB Swiss Institute of Bioinformatics	May 31, 2018	This variant is interpreted as a Benign - Stand Alone. The following ACMG Tag(s) were applied: BA1 => Allele frequency is >5% in Exome Sequencing Project, 1000 Genomes Project, or Exome Aggregation Consortium. BP4 => Multiple lines of computational evidence suggest no impact on gene or gene product (conservation, evolutionary, splicing impact, etc.). -
Benign, criteria provided, single submitter	clinical testing	GeneDx	May 27, 2014	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. -

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Aug 14, 2017	- -
Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A2;C3150416:Muscular dystrophy-dystroglycanopathy (congenital with intellectual disability), type B2;C3150418:Autosomal recessive limb-girdle muscular dystrophy type 2N

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 31, 2024

- -

Autosomal recessive limb-girdle muscular dystrophy type 2N

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.095

BayesDel_addAF

Benign

-0.57

BayesDel_noAF

Benign

-0.50

CADD

Benign

2.2

DANN

Benign

0.92

DEOGEN2

Benign

0.054

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.4

FATHMM_MKL

Benign

0.077

LIST_S2

Benign

0.50

MetaRNN

Benign

0.0017

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.63

PrimateAI

Uncertain

0.58

PROVEAN

Benign

0.99

REVEL

Benign

0.098

Sift

Benign

1.0

Sift4G

Benign

1.0

Polyphen

0.0010

Vest4

0.16

MVP

0.47

MPC

0.096

ClinPred

0.0082

GERP RS

-1.7

Varity_R

0.048

gMVP

0.55

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