Genetic Variant B4GALNT2:p.Arg20Gln (chr17-49133084-G-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_153446.3(B4GALNT2):c.59G>A(p.Arg20Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000212 in 1,512,180 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000021 ( 0 hom. )

Consequence

B4GALNT2
NM_153446.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -1.21

Publications

0 publications found

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 was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.035443276).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_153446.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
B4GALNT2	NM_001159387.2	MANE Select	c.14+278G>A		intron	N/A	NP_001152859.1	Q8NHY0-2
B4GALNT2	NM_153446.3		c.59G>A	p.Arg20Gln	missense	Exon 1 of 11	NP_703147.2	Q8NHY0-1
B4GALNT2	NM_001159388.2		c.-65+574G>A		intron	N/A	NP_001152860.1	Q8NHY0-3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
B4GALNT2	ENST00000300404.2	TSL:1	c.59G>A	p.Arg20Gln	missense	Exon 1 of 11	ENSP00000300404.2	Q8NHY0-1
B4GALNT2	ENST00000393354.7	TSL:1 MANE Select	c.14+278G>A		intron	N/A	ENSP00000377022.3	Q8NHY0-2
B4GALNT2	ENST00000954078.1		c.14+278G>A		intron	N/A	ENSP00000624137.1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152174

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000181

AC:

AN:

165636

AF XY:

0.0000216

show subpopulations

Gnomad AFR exome

AF:

0.000197

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000119

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000206

AC:

AN:

1360006

Hom.:

Cov.:

AF XY:

0.0000238

AC XY:

AN XY:

672470

show subpopulations

African (AFR)

AF:

0.000114

AC:

AN:

26406

American (AMR)

AF:

0.00

AC:

AN:

22436

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

22540

East Asian (EAS)

AF:

0.00

AC:

AN:

32110

South Asian (SAS)

AF:

0.00

AC:

AN:

72492

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52446

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5400

European-Non Finnish (NFE)

AF:

0.0000224

AC:

AN:

1070430

Other (OTH)

AF:

0.0000179

AC:

AN:

55746

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.473

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:

0.0000263

AC:

AN:

152174

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74336

show subpopulations

African (AFR)

AF:

0.0000483

AC:

AN:

41446

American (AMR)

AF:

0.00

AC:

AN:

15284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.00

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68022

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.488

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:

0.00

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000412

AC:

ClinVar

ClinVar submissions as Germline

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.093

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.75

CADD

Benign

1.5

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.044

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.5

FATHMM_MKL

Benign

0.026

LIST_S2

Benign

0.44

M_CAP

Benign

0.0012

MetaRNN

Benign

0.035

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.0

PhyloP100

-1.2

PrimateAI

Benign

0.27

PROVEAN

Benign

-0.13

REVEL

Benign

0.0040

Sift

Benign

0.42

Sift4G

Pathogenic

0.0

Polyphen

0.0050

Vest4

0.059

MutPred

0.26

Loss of phosphorylation at S17 (P = 0.0809)

MVP

0.26

MPC

0.28

ClinPred

0.019

GERP RS

-2.3

PromoterAI

0.064

Neutral

(source)

Varity_R

0.023

gMVP

0.15

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over