Variant chr17-49164212-C-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_001159387.2(B4GALNT2):c.891C>G(p.Asp297Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,398 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: not found (cov: 31)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

B4GALNT2
NM_001159387.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.88

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:

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.984

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
B4GALNT2	NM_001159387.2 linkuse as main transcript	c.891C>G	p.Asp297Glu	missense_variant	8/11	ENST00000393354.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
B4GALNT2	ENST00000393354.7 linkuse as main transcript	c.891C>G	p.Asp297Glu	missense_variant	8/11	1	NM_001159387.2	P1	Q8NHY0-2
B4GALNT2	ENST00000300404.2 linkuse as main transcript	c.1071C>G	p.Asp357Glu	missense_variant	8/11	1			Q8NHY0-1
B4GALNT2	ENST00000504681.5 linkuse as main transcript	c.813C>G	p.Asp271Glu	missense_variant	8/11	2			Q8NHY0-3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461398

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727034

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:

9.00e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 28, 2023

The c.1071C>G (p.D357E) alteration is located in exon 8 (coding exon 8) of the B4GALNT2 gene. This alteration results from a C to G substitution at nucleotide position 1071, causing the aspartic acid (D) at amino acid position 357 to be replaced by a glutamic acid (E). 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

Pathogenic

0.95

BayesDel_addAF

Pathogenic

0.35

BayesDel_noAF

Pathogenic

0.27

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.55

.;.;D

Eigen

Benign

0.0075

Eigen_PC

Benign

-0.20

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.88

D;D;D

M_CAP

Benign

0.020

MetaRNN

Pathogenic

0.98

D;D;D

MetaSVM

Uncertain

0.066

MutationAssessor

Pathogenic

4.2

.;.;H

MutationTaster

Benign

0.98

D;D;D

PrimateAI

Uncertain

0.49

PROVEAN

Uncertain

-3.9

D;D;D

REVEL

Uncertain

0.58

Sift

Pathogenic

0.0

D;D;D

Sift4G

Pathogenic

0.0

D;D;D

Polyphen

1.0

.;D;D

Vest4

0.77

MutPred

0.91

.;.;Gain of ubiquitination at K360 (P = 0.1062);

MVP

0.90

MPC

0.65

ClinPred

1.0

GERP RS

1.2

Varity_R

0.68

gMVP

0.71

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over