Variant 12-122207053-A-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 NM_030765.4(B3GNT4):c.802A>G(p.Arg268Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000057 in 1,613,836 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00034 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000027 ( 0 hom. )

Consequence

B3GNT4
NM_030765.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.134

Variant links:

Genes affected

B3GNT4 (HGNC:15683): (UDP-GlcNAc:betaGal beta-1,3-N-acetylglucosaminyltransferase 4) This gene encodes a member of the beta-1,3-N-acetylglucosaminyltransferase protein family. The encoded enzyme is involved in the biosynthesis of poly-N-acetyllactosamine chains and prefers lacto-N-neotetraose as a substrate. It is a type II transmembrane protein. [provided by RefSeq, Jul 2008]

B3GNT4 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=0.012914002).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
B3GNT4	NM_030765.4 linkuse as main transcript	c.802A>G	p.Arg268Gly	missense_variant	3/3	ENST00000324189.5	NP_110392.1
B3GNT4	NM_001330492.2 linkuse as main transcript	c.727A>G	p.Arg243Gly	missense_variant	2/2		NP_001317421.1
B3GNT4	XM_047429535.1 linkuse as main transcript	c.727A>G	p.Arg243Gly	missense_variant	2/2		XP_047285491.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
B3GNT4	ENST00000324189.5 linkuse as main transcript	c.802A>G	p.Arg268Gly	missense_variant	3/3	1	NM_030765.4	ENSP00000319636	A2	Q9C0J1-1

Frequencies

GnomAD3 genomes

AF:

0.000342

AC:

AN:

152136

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00113

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

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:

0.000478

GnomAD3 exomes

AF:

0.0000678

AC:

AN:

250846

Hom.:

AF XY:

0.0000664

AC XY:

AN XY:

135524

show subpopulations

Gnomad AFR exome

AF:

0.000861

Gnomad AMR exome

AF:

0.0000869

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:

0.0000274

AC:

AN:

1461582

Hom.:

Cov.:

AF XY:

0.0000330

AC XY:

AN XY:

727070

show subpopulations

Gnomad4 AFR exome

AF:

0.00102

Gnomad4 AMR exome

AF:

0.0000671

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:

0.0000497

GnomAD4 genome

AF:

0.000342

AC:

AN:

152254

Hom.:

Cov.:

AF XY:

0.000376

AC XY:

AN XY:

74430

show subpopulations

Gnomad4 AFR

AF:

0.00113

Gnomad4 AMR

AF:

0.000262

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:

0.000473

Alfa

AF:

0.0000785

Hom.:

Bravo

AF:

0.000355

ESP6500AA

AF:

0.00182

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000906

AC:

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 15, 2022

The c.802A>G (p.R268G) alteration is located in exon 3 (coding exon 2) of the B3GNT4 gene. This alteration results from a A to G substitution at nucleotide position 802, causing the arginine (R) at amino acid position 268 to be replaced by a glycine (G). 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

0.066

BayesDel_addAF

Benign

-0.59

BayesDel_noAF

Benign

-0.64

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.011

T;.;.

Eigen

Benign

-0.59

Eigen_PC

Benign

-0.47

FATHMM_MKL

Benign

0.11

LIST_S2

Benign

0.22

T;.;T

M_CAP

Benign

0.0054

MetaRNN

Benign

0.013

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.14

N;.;.

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.33

PROVEAN

Benign

0.68

N;N;N

REVEL

Benign

0.027

Sift

Benign

0.46

T;T;T

Sift4G

Benign

0.57

T;T;T

Polyphen

0.0020

B;.;.

Vest4

0.13

MVP

0.39

MPC

0.011

ClinPred

0.015

GERP RS

3.0

Varity_R

0.11

gMVP

0.50

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