rs137853086

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 16 ACMG points: 16P and 0B. PVS1PP5_Very_Strong

The NM_004482.4(GALNT3):c.484C>T(p.Arg162*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000533 in 1,614,038 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.00019 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000039 ( 0 hom. )

Consequence

GALNT3
NM_004482.4 stop_gained

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:7

Conservation

PhyloP100: 2.21

Publications

22 publications found

Variant links:

Genes affected

GALNT3 (HGNC:4125): (polypeptide N-acetylgalactosaminyltransferase 3) This gene encodes UDP-GalNAc transferase 3, a member of the GalNAc-transferases family. This family transfers an N-acetyl galactosamine to the hydroxyl group of a serine or threonine residue in the first step of O-linked oligosaccharide biosynthesis. Individual GalNAc-transferases have distinct activities and initiation of O-glycosylation is regulated by a repertoire of GalNAc-transferases. The protein encoded by this gene is highly homologous to other family members, however the enzymes have different substrate specificities. [provided by RefSeq, Jul 2008]

GALNT3 Gene-Disease associations (from GenCC):

tumoral calcinosis, hyperphosphatemic, familial, 1
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, ClinGen, Labcorp Genetics (formerly Invitae)
tumoral calcinosis, hyperphosphatemic, familial, 1
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Genomics England PanelApp, PanelApp Australia

GALNT3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 16 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PP5

Variant 2-165770217-G-A is Pathogenic according to our data. Variant chr2-165770217-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 7792.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GALNT3	NM_004482.4 link	c.484C>T	p.Arg162*	stop_gained	Exon 2 of 11	ENST00000392701.8	NP_004473.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
GALNT3	ENST00000392701.8 link	c.484C>T	p.Arg162*	stop_gained	Exon 2 of 11	1	NM_004482.4	ENSP00000376465.3
GALNT3	ENST00000715282.1 link	c.484C>T	p.Arg162*	stop_gained	Exon 2 of 11			ENSP00000520447.1
GALNT3	ENST00000412248.5 link	c.484C>T	p.Arg162*	stop_gained	Exon 3 of 8	5		ENSP00000412643.1
GALNT3	ENST00000431484.1 link	c.*214C>T		downstream_gene_variant		4		ENSP00000397112.1

Frequencies

GnomAD3 genomes

AF:

0.000191

AC:

AN:

152048

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000676

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.000478

GnomAD2 exomes

AF:

0.0000676

AC:

AN:

251320

AF XY:

0.0000368

show subpopulations

Gnomad AFR exome

AF:

0.000738

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000352

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000390

AC:

AN:

1461872

Hom.:

Cov.:

AF XY:

0.0000330

AC XY:

AN XY:

727238

show subpopulations

African (AFR)

AF:

0.000597

AC:

AN:

33480

American (AMR)

AF:

0.0000224

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000279

AC:

AN:

1112008

Other (OTH)

AF:

0.0000828

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.474

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

AF:

0.000191

AC:

AN:

152166

Hom.:

Cov.:

AF XY:

0.000202

AC XY:

AN XY:

74364

show subpopulations

African (AFR)

AF:

0.000674

AC:

AN:

41516

American (AMR)

AF:

0.00

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5172

South Asian (SAS)

AF:

0.00

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10582

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67992

Other (OTH)

AF:

0.000473

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.472

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:

0.000111

Hom.:

Bravo

AF:

0.000204

ESP6500AA

AF:

0.00113

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000115

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.0000593

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Tumoral calcinosis, hyperphosphatemic, familial, 1

Pathogenic:5

Apr 01, 2005

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

- -

Oct 15, 2018

SIB Swiss Institute of Bioinformatics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:curation

This variant is interpreted as Pathogenic, for Tumoral calcinosis, hyperphosphatemic, familial, 1, autosomal recessive. The following ACMG Tag(s) were applied: PM2 => Absent from controls (or at extremely low frequency if recessive) in Exome Sequencing Project, 1000 Genomes Project, or Exome Aggregation Consortium. PVS1-Strong => PVS1 downgraded in strength to Strong. PP1-Moderate => PP1 upgraded in strength to Moderate (https://www.ncbi.nlm.nih.gov/pubmed/15133511). PM3 => For recessive disorders, detected in trans with a pathogenic variant (https://www.ncbi.nlm.nih.gov/pubmed/15687324) (https://www.ncbi.nlm.nih.gov/pubmed/15133511). -

Apr 27, 2023

Greenwood Genetic Center Diagnostic Laboratories, Greenwood Genetic Center

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

PVS1, PM2, PM3 -

Feb 12, 2024

Fulgent Genetics, Fulgent Genetics

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Mar 20, 2025

Laboratorio de Genetica e Diagnostico Molecular, Hospital Israelita Albert Einstein

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

ACMG classification criteria: PVS1 very strong, PM3 strong, PP1 supporting -

not provided

Pathogenic:2

Oct 23, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change creates a premature translational stop signal (p.Arg162*) in the GALNT3 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in GALNT3 are known to be pathogenic (PMID: 15133511, 20358599). This variant is present in population databases (rs137853086, gnomAD 0.09%). This premature translational stop signal has been observed in individuals with tumoral calcinosis (PMID: 15133511, 24668887, 25351881, 26337219). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 7792). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. For these reasons, this variant has been classified as Pathogenic. -

Jan 18, 2022

GeneDx

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Nonsense variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; This variant is associated with the following publications: (PMID: 24668887, 25351881, 31589614, 26337219, 20358599, 15687324, 15133511) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.34

BayesDel_noAF

Pathogenic

0.65

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

Eigen

Pathogenic

0.85

Eigen_PC

Pathogenic

0.74

FATHMM_MKL

Pathogenic

0.98

PhyloP100

2.2

Vest4

0.91

GERP RS

5.8

Mutation Taster

=1/199

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.13

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

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over