Genetic Variant B3GAT1:p.Val72Met (chr11-134384087-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_054025.3(B3GAT1):c.214G>A(p.Val72Met) variant causes a missense change. The variant allele was found at a frequency of 0.00000346 in 1,446,808 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000035 ( 0 hom. )

Consequence

B3GAT1
NM_054025.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.10

Publications

0 publications found

Variant links:

Genes affected

B3GAT1 (HGNC:921): (beta-1,3-glucuronyltransferase 1) The protein encoded by this gene is a member of the glucuronyltransferase gene family. These enzymes exhibit strict acceptor specificity, recognizing nonreducing terminal sugars and their anomeric linkages. This gene product functions as the key enzyme in a glucuronyl transfer reaction during the biosynthesis of the carbohydrate epitope HNK-1 (human natural killer-1, also known as CD57 and LEU7). Alternate transcriptional splice variants have been characterized. [provided by RefSeq, Jul 2008]

B3GAT1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
B3GAT1	NM_054025.3 link	c.214G>A	p.Val72Met	missense_variant	Exon 3 of 6	ENST00000312527.9	NP_473366.1	Q9P2W7-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
B3GAT1	ENST00000312527.9 link	c.214G>A	p.Val72Met	missense_variant	Exon 3 of 6	1	NM_054025.3	ENSP00000307875.4		Q9P2W7-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000424

AC:

AN:

235716

AF XY:

0.00000773

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000929

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000346

AC:

AN:

1446808

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

719088

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33312

American (AMR)

AF:

0.00

AC:

AN:

44494

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26002

East Asian (EAS)

AF:

0.00

AC:

AN:

39482

South Asian (SAS)

AF:

0.00

AC:

AN:

85936

European-Finnish (FIN)

AF:

0.00

AC:

AN:

44114

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5750

European-Non Finnish (NFE)

AF:

0.00000451

AC:

AN:

1107748

Other (OTH)

AF:

0.00

AC:

AN:

59970

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.415

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 19, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.214G>A (p.V72M) alteration is located in exon 3 (coding exon 2) of the B3GAT1 gene. This alteration results from a G to A substitution at nucleotide position 214, causing the valine (V) at amino acid position 72 to be replaced by a methionine (M). 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

0.30

BayesDel_addAF

Uncertain

0.11

BayesDel_noAF

Uncertain

-0.080

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.23

T;T;T

Eigen

Uncertain

0.36

Eigen_PC

Uncertain

0.42

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.97

D;.;.

M_CAP

Benign

0.065

MetaRNN

Uncertain

0.52

D;D;D

MetaSVM

Benign

-0.70

MutationAssessor

Uncertain

2.2

M;M;M

PhyloP100

6.1

PrimateAI

Pathogenic

0.87

PROVEAN

Benign

-0.63

N;N;N

REVEL

Benign

0.16

Sift

Uncertain

0.010

D;D;D

Sift4G

Benign

0.14

T;T;T

Polyphen

0.89

P;P;P

Vest4

0.68

MVP

0.30

MPC

1.6

ClinPred

0.78

GERP RS

4.8

Varity_R

0.21

gMVP

0.85

Mutation Taster

=45/55

disease causing

(source)

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

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11-134384087-C-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over