6-70861698-T-G

Position:

chr6-70861698-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The ENST00000230053.11(B3GAT2):c.937A>C(p.Lys313Gln) variant causes a missense change. The variant allele was found at a frequency of 0.00000547 in 1,461,802 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K313N) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

B3GAT2
ENST00000230053.11 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.66

Variant links:

Genes affected

B3GAT2 (HGNC:922): (beta-1,3-glucuronyltransferase 2) The product of this gene is a transmembrane protein belonging to the glucuronyltransferase family, and catalyzes the transfer of a beta-1,3 linked glucuronic acid to a terminal galactose in different glycoproteins or glycolipids containing a Gal-beta-1-4GlcNAc or Gal-beta-1-3GlcNAc residue. The encoded protein is involved in the synthesis of the human natural killer-1 (HNK-1) carbohydrate epitope, a sulfated trisaccharide implicated in cellular migration and adhesion in the nervous system. [provided by RefSeq, Jul 2008]

B3GAT2 links:

SMAP1 (HGNC:19651): (small ArfGAP 1) The protein encoded by this gene is similar to the mouse stromal membrane-associated protein-1. This similarity suggests that this human gene product is also a type II membrane glycoprotein involved in the erythropoietic stimulatory activity of stromal cells. Alternate splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2008]

SMAP1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.27960226).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
B3GAT2	NM_080742.3 linkuse as main transcript	c.937A>C	p.Lys313Gln	missense_variant	4/4	ENST00000230053.11	NP_542780.1
SMAP1	NM_001044305.3 linkuse as main transcript	c.*1364T>G		3_prime_UTR_variant	11/11	ENST00000370455.8	NP_001037770.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
B3GAT2	ENST00000230053.11 linkuse as main transcript	c.937A>C	p.Lys313Gln	missense_variant	4/4	1	NM_080742.3	ENSP00000230053	P1
B3GAT2	ENST00000615536.1 linkuse as main transcript	c.721A>C	p.Lys241Gln	missense_variant	4/4	1		ENSP00000481320
SMAP1	ENST00000370455.8 linkuse as main transcript	c.*1364T>G		3_prime_UTR_variant	11/11	1	NM_001044305.3	ENSP00000359484	P3	Q8IYB5-1
SMAP1	ENST00000619054.4 linkuse as main transcript	c.*1364T>G		3_prime_UTR_variant	11/11	1		ENSP00000484538

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251098

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135696

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:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000881

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000547

AC:

AN:

1461802

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727204

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:

0.0000187

Gnomad4 NFE exome

AF:

0.00000630

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000468

Hom.:

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

Dec 14, 2021

The c.937A>C (p.K313Q) alteration is located in exon 4 (coding exon 4) of the B3GAT2 gene. This alteration results from a A to C substitution at nucleotide position 937, causing the lysine (K) at amino acid position 313 to be replaced by a glutamine (Q). 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

0.45

BayesDel_addAF

Benign

-0.078

BayesDel_noAF

Benign

-0.35

CADD

Pathogenic

DANN

Uncertain

0.98

DEOGEN2

Benign

0.12

T;.

Eigen

Uncertain

0.23

Eigen_PC

Uncertain

0.35

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.91

D;D

M_CAP

Benign

0.015

MetaRNN

Benign

0.28

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.1

L;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.52

PROVEAN

Benign

-2.2

N;.

REVEL

Benign

0.11

Sift

Uncertain

0.028

D;.

Sift4G

Uncertain

0.039

D;D

Polyphen

0.70

P;.

Vest4

0.43

MutPred

0.41

Loss of ubiquitination at K313 (P = 0.0071);.;

MVP

0.71

MPC

1.2

ClinPred

0.65

GERP RS

5.5

Varity_R

0.75

gMVP

0.55

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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