chr14-77283759-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_013382.7(POMT2):c.1653+38G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00497 in 1,526,372 control chromosomes in the GnomAD database, including 38 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0037 ( 3 hom., cov: 32)

Exomes 𝑓: 0.0051 ( 35 hom. )

Consequence

POMT2
NM_013382.7 intron

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -0.265

Publications

1 publications found

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 Gene-Disease associations (from GenCC):

muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type A2
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), G2P
myopathy caused by variation in POMT2
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
muscular dystrophy-dystroglycanopathy (congenital with intellectual disability), type B2
Inheritance: AR Classification: MODERATE Submitted by: Ambry Genetics
autosomal recessive limb-girdle muscular dystrophy type 2N
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
muscle-eye-brain disease
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
muscular dystrophy-dystroglycanopathy, type A
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

POMT2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.82).

BP6

Variant 14-77283759-C-T is Benign according to our data. Variant chr14-77283759-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 260295.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.00368 (561/152266) while in subpopulation AMR AF = 0.00667 (102/15302). AF 95% confidence interval is 0.00562. There are 3 homozygotes in GnomAd4. There are 260 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 3 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_013382.7. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	POMT2	NM_013382.7	MANE Select	c.1653+38G>A		intron	N/A	NP_037514.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
POMT2	ENST00000261534.9	TSL:1 MANE Select	c.1653+38G>A	intron	N/A	ENSP00000261534.4	Q9UKY4-1
POMT2	ENST00000682795.1		c.1653+38G>A	intron	N/A	ENSP00000507574.1	A0A804HJN3
POMT2	ENST00000923942.1		c.1653+38G>A	intron	N/A	ENSP00000594001.1

Frequencies

GnomAD3 genomes

AF:

0.00368

AC:

560

AN:

152148

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000894

Gnomad AMI

AF:

0.00329

Gnomad AMR

AF:

0.00674

Gnomad ASJ

AF:

0.00173

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00352

Gnomad FIN

AF:

0.000660

Gnomad MID

AF:

0.00633

Gnomad NFE

AF:

0.00542

Gnomad OTH

AF:

0.00766

GnomAD2 exomes

AF:

0.00358

AC:

899

AN:

251422

AF XY:

0.00389

show subpopulations

Gnomad AFR exome

AF:

0.000861

Gnomad AMR exome

AF:

0.00413

Gnomad ASJ exome

AF:

0.000794

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000277

Gnomad NFE exome

AF:

0.00531

Gnomad OTH exome

AF:

0.00424

GnomAD4 exome

AF:

0.00511

AC:

7019

AN:

1374106

Hom.:

Cov.:

AF XY:

0.00522

AC XY:

3589

AN XY:

688146

show subpopulations

African (AFR)

AF:

0.000794

AC:

AN:

31484

American (AMR)

AF:

0.00437

AC:

195

AN:

44598

Ashkenazi Jewish (ASJ)

AF:

0.000741

AC:

AN:

25654

East Asian (EAS)

AF:

0.00

AC:

AN:

39252

South Asian (SAS)

AF:

0.00342

AC:

289

AN:

84450

European-Finnish (FIN)

AF:

0.000806

AC:

AN:

53380

Middle Eastern (MID)

AF:

0.0113

AC:

AN:

5588

European-Non Finnish (NFE)

AF:

0.00588

AC:

6071

AN:

1032100

Other (OTH)

AF:

0.00545

AC:

314

AN:

57600

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.507

Heterozygous variant carriers

366

732

1098

1464

1830

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

232

464

696

928

1160

<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:

0.00368

AC:

561

AN:

152266

Hom.:

Cov.:

AF XY:

0.00349

AC XY:

260

AN XY:

74456

show subpopulations

African (AFR)

AF:

0.000891

AC:

AN:

41526

American (AMR)

AF:

0.00667

AC:

102

AN:

15302

Ashkenazi Jewish (ASJ)

AF:

0.00173

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.00373

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.000660

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.00680

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00544

AC:

370

AN:

68034

Other (OTH)

AF:

0.00758

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.503

Heterozygous variant carriers

120

150

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:

0.00427

Hom.:

Bravo

AF:

0.00403

Asia WGS

AF:

0.00115

AC:

AN:

3478

ClinVar

ClinVar submissions

Significance:Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.82

CADD

Benign

5.1

(source)

DANN

Benign

0.67

PhyloP100

-0.27

PromoterAI

-0.025

Neutral

(source)

Mutation Taster

=100/0

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over