Variant 17-49133190-T-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The ENST00000300404.2(B4GALNT2):c.165T>G(p.Phe55Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000179 in 1,507,746 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000074 ( 0 hom. )

Consequence

B4GALNT2
ENST00000300404.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.109

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 Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.06610456).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
B4GALNT2	NM_001159387.2 linkuse as main transcript	c.14+384T>G		intron_variant		ENST00000393354.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
B4GALNT2	ENST00000300404.2 linkuse as main transcript	c.165T>G	p.Phe55Leu	missense_variant	1/11	1			Q8NHY0-1
B4GALNT2	ENST00000393354.7 linkuse as main transcript	c.14+384T>G		intron_variant		1	NM_001159387.2	P1	Q8NHY0-2
B4GALNT2	ENST00000504681.5 linkuse as main transcript	c.-65+680T>G		intron_variant		2			Q8NHY0-3

Frequencies

GnomAD3 genomes

AF:

0.000118

AC:

AN:

151954

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000435

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:

0.00

GnomAD3 exomes

AF:

0.00000906

AC:

AN:

110378

Hom.:

AF XY:

0.0000162

AC XY:

AN XY:

61780

show subpopulations

Gnomad AFR exome

AF:

0.000291

Gnomad AMR exome

AF:

0.00

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000738

AC:

AN:

1355674

Hom.:

Cov.:

AF XY:

0.00000896

AC XY:

AN XY:

669812

show subpopulations

Gnomad4 AFR exome

AF:

0.000328

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:

0.00

Gnomad4 OTH exome

AF:

0.0000179

GnomAD4 genome

AF:

0.000112

AC:

AN:

152072

Hom.:

Cov.:

AF XY:

0.0000807

AC XY:

AN XY:

74344

show subpopulations

Gnomad4 AFR

AF:

0.000410

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:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000431

Hom.:

Bravo

AF:

0.000185

ESP6500AA

AF:

0.000487

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000179

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

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

Jun 07, 2024

The c.165T>G (p.F55L) alteration is located in exon 1 (coding exon 1) of the B4GALNT2 gene. This alteration results from a T to G substitution at nucleotide position 165, causing the phenylalanine (F) at amino acid position 55 to be replaced by a leucine (L). 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

Uncertain

0.46

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.54

CADD

Benign

7.5

DANN

Benign

0.79

DEOGEN2

Benign

0.044

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.031

LIST_S2

Benign

0.32

M_CAP

Benign

0.0016

MetaRNN

Benign

0.066

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.0

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Uncertain

0.50

PROVEAN

Benign

-0.19

REVEL

Benign

0.085

Sift

Benign

0.15

Sift4G

Benign

0.78

Polyphen

0.72

Vest4

0.21

MutPred

0.30

Gain of helix (P = 0.0854);

MVP

0.35

MPC

0.24

ClinPred

0.062

GERP RS

-0.26

Varity_R

0.085

gMVP

0.18

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