Variant 17-49152892-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_001159387.2(B4GALNT2):c.446C>T(p.Thr149Met) variant causes a missense change. The variant allele was found at a frequency of 0.0000267 in 1,609,556 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 Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000029 ( 0 hom. )

Consequence

B4GALNT2
NM_001159387.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.63

Variant links:

Genes affected

B4GALNT2 (HGNC:24136): (beta-1,4-N-acetyl-galactosaminyltransferase 2 (SID blood group)) B4GALNT2 catalyzes the last step in the biosynthesis of the human Sd(a) antigen through the addition of an N-acetylgalactosamine residue via a beta-1,4 linkage to a subterminal galactose residue substituted with an alpha-2,3-linked sialic acid. B4GALNT2 also catalyzes the last step in the biosynthesis of the Cad antigen (Montiel et al., 2003 [PubMed 12678917]).[supplied by OMIM, Mar 2008]

B4GALNT2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.785

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
B4GALNT2	NM_001159387.2 link	c.446C>T	p.Thr149Met	missense_variant	Exon 4 of 11	ENST00000393354.7	NP_001152859.1	Q8NHY0-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
B4GALNT2	ENST00000393354.7 link	c.446C>T	p.Thr149Met	missense_variant	Exon 4 of 11	1	NM_001159387.2	ENSP00000377022.3	Q8NHY0-2
B4GALNT2	ENST00000300404.2 link	c.626C>T	p.Thr209Met	missense_variant	Exon 4 of 11	1		ENSP00000300404.2	Q8NHY0-1
B4GALNT2	ENST00000504681.5 link	c.368C>T	p.Thr123Met	missense_variant	Exon 4 of 11	2		ENSP00000425510.1	Q8NHY0-3

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152266

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000331

AC:

AN:

241494

Hom.:

AF XY:

0.0000306

AC XY:

AN XY:

130728

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000589

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000368

Gnomad OTH exome

AF:

0.000337

GnomAD4 exome

AF:

0.0000288

AC:

AN:

1457290

Hom.:

Cov.:

AF XY:

0.0000290

AC XY:

AN XY:

724524

show subpopulations

Gnomad4 AFR exome

AF:

0.0000300

Gnomad4 AMR exome

AF:

0.0000676

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000506

Gnomad4 SAS exome

AF:

0.0000352

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000252

Gnomad4 OTH exome

AF:

0.0000831

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152266

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74396

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:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000868

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 13, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.626C>T (p.T209M) alteration is located in exon 4 (coding exon 4) of the B4GALNT2 gene. This alteration results from a C to T substitution at nucleotide position 626, causing the threonine (T) at amino acid position 209 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.23

BayesDel_addAF

Uncertain

0.081

BayesDel_noAF

Benign

-0.12

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.45

.;.;T

Eigen

Uncertain

0.64

Eigen_PC

Uncertain

0.58

FATHMM_MKL

Uncertain

0.84

LIST_S2

Uncertain

0.86

D;D;D

M_CAP

Benign

0.013

MetaRNN

Pathogenic

0.79

D;D;D

MetaSVM

Benign

-0.61

MutationAssessor

Pathogenic

3.2

.;.;M

PrimateAI

Uncertain

0.62

PROVEAN

Uncertain

-3.6

D;D;D

REVEL

Benign

0.19

Sift

Uncertain

0.0020

D;D;D

Sift4G

Uncertain

0.015

D;D;D

Polyphen

1.0

.;D;D

Vest4

0.72

MutPred

0.45

.;.;Loss of glycosylation at T209 (P = 0.0294);

MVP

0.80

MPC

0.68

ClinPred

0.91

GERP RS

5.3

Varity_R

0.30

gMVP

0.70

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