rs367543072

Variant names:

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM2PP3PP5

The NM_152490.5(B3GALNT2):c.740G>A(p.Gly247Glu) variant causes a missense change. The variant allele was found at a frequency of 0.0000229 in 1,613,980 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000024 ( 0 hom. )

Consequence

B3GALNT2
NM_152490.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:5U:1O:1

Conservation

PhyloP100: 3.97

Variant links:

Genes affected

B3GALNT2 (HGNC:28596): (beta-1,3-N-acetylgalactosaminyltransferase 2) This gene encodes a member of the glycosyltransferase 31 family. The encoded protein synthesizes GalNAc:beta-1,3GlcNAc, a novel carbohydrate structure, on N- and O-glycans. Alternatively spliced transcript variants that encode different isoforms have been described. [provided by RefSeq, Mar 2013]

B3GALNT2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_152490.5

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.789

PP5

Variant 1-235470872-C-T is Pathogenic according to our data. Variant chr1-235470872-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 41934.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=3, Uncertain_significance=1, not_provided=1}. Variant chr1-235470872-C-T is described in UniProt as null. Variant chr1-235470872-C-T is described in Lovd as [Likely_pathogenic]. Variant chr1-235470872-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
B3GALNT2	NM_152490.5 link	c.740G>A	p.Gly247Glu	missense_variant	Exon 6 of 12	ENST00000366600.8	NP_689703.1	Q8NCR0-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
B3GALNT2	ENST00000366600.8 link	c.740G>A	p.Gly247Glu	missense_variant	Exon 6 of 12	1	NM_152490.5	ENSP00000355559.3		Q8NCR0-1

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

152086

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000159

AC:

AN:

251382

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135852

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000239

AC:

AN:

1461776

Hom.:

Cov.:

AF XY:

0.0000261

AC XY:

AN XY:

727192

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000297

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152204

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74402

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000208

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000151

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ExAC

AF:

0.00000824

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:5Uncertain:1Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Muscular dystrophy-dystroglycanopathy (congenital with brain and eye anomalies), type a, 11

Pathogenic:4Uncertain:1

Kasturba Medical College, Manipal, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

- -

Jun 27, 2013

ClinVar Staff, National Center for Biotechnology Information (NCBI)

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Mar 07, 2013

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Jan 25, 2020

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. This variant has been reported to affect B3GALNT2 protein function (PMID: 23453667, 29273094). This variant has been observed in combination with another B3GALNT2 variant in an individual affected with dystroglycanopathy (PMID: 23453667). ClinVar contains an entry for this variant (Variation ID: 41934). This variant is present in population databases (rs367543072, ExAC 0.006%). This sequence change replaces glycine with glutamic acid at codon 247 of the B3GALNT2 protein (p.Gly247Glu). The glycine residue is highly conserved and there is a moderate physicochemical difference between glycine and glutamic acid. -

Jan 18, 2023

Revvity Omics, Revvity

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Pathogenic:1Other:1

May 03, 2024

GeneDx

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Not observed at significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 32906206, 29273094, 23453667, 34302356) -

Leiden Muscular Dystrophy pages (B3GALNT2)

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.67

BayesDel_addAF

Uncertain

0.13

BayesDel_noAF

Uncertain

0.040

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.20

T;.

Eigen

Uncertain

0.54

Eigen_PC

Uncertain

0.57

FATHMM_MKL

Uncertain

0.90

M_CAP

Benign

0.080

MetaRNN

Pathogenic

0.79

D;D

MetaSVM

Benign

-0.56

MutationAssessor

Uncertain

2.6

M;.

PrimateAI

Uncertain

0.60

PROVEAN

Uncertain

-3.5

D;D

REVEL

Benign

0.25

Sift

Benign

0.15

T;.

Sift4G

Benign

0.14

T;D

Polyphen

1.0

D;D

Vest4

0.88

MutPred

0.68

Gain of solvent accessibility (P = 0.0411);.;

MVP

0.81

MPC

0.69

ClinPred

0.89

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.69

gMVP

0.84

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