Genetic Variant B4GALNT4:p.Gly97Val (chr11-372696-G-T) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_178537.5(B4GALNT4):c.290G>T(p.Gly97Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000616 in 1,459,896 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G97A) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 30)

Exomes 𝑓: 0.0000062 ( 0 hom. )

Consequence

B4GALNT4
NM_178537.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.176

Publications

0 publications found

Variant links:

Genes affected

B4GALNT4 (HGNC:26315): (beta-1,4-N-acetyl-galactosaminyltransferase 4) Enables acetylgalactosaminyltransferase activity. Predicted to be located in Golgi cisterna membrane. Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

B4GALNT4 links:

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ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.050643444).

BS2

High AC in GnomAdExome4 at 9 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
B4GALNT4	NM_178537.5 link	c.290G>T	p.Gly97Val	missense_variant	Exon 3 of 20	ENST00000329962.11	NP_848632.2	Q76KP1
B4GALNT4	XM_017017654.2 link	c.14G>T	p.Gly5Val	missense_variant	Exon 3 of 20		XP_016873143.1
B4GALNT4	XR_001747858.2 link	n.595G>T		non_coding_transcript_exon_variant	Exon 3 of 18

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
B4GALNT4	ENST00000329962.11 link	c.290G>T	p.Gly97Val	missense_variant	Exon 3 of 20	1	NM_178537.5	ENSP00000328277.6		Q76KP1
B4GALNT4	ENST00000530717.1 link	n.298G>T		non_coding_transcript_exon_variant	Exon 3 of 3	3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000616

AC:

AN:

1459896

Hom.:

Cov.:

AF XY:

0.00000689

AC XY:

AN XY:

726164

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44676

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26104

East Asian (EAS)

AF:

0.00

AC:

AN:

39690

South Asian (SAS)

AF:

0.00

AC:

AN:

86084

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52030

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.00000720

AC:

AN:

1111744

Other (OTH)

AF:

0.00

AC:

AN:

60326

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.497

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 14, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.290G>T (p.G97V) alteration is located in exon 3 (coding exon 3) of the B4GALNT4 gene. This alteration results from a G to T substitution at nucleotide position 290, causing the glycine (G) at amino acid position 97 to be replaced by a valine (V). 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

0.093

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.68

CADD

Benign

0.32

(source)

DANN

Benign

0.42

DEOGEN2

Benign

0.0058

Eigen

Benign

-1.6

Eigen_PC

Benign

-1.7

FATHMM_MKL

Benign

0.044

LIST_S2

Benign

0.48

M_CAP

Benign

0.017

MetaRNN

Benign

0.051

MetaSVM

Benign

-0.98

MutationAssessor

Benign

1.2

PhyloP100

-0.18

PrimateAI

Benign

0.30

PROVEAN

Uncertain

-2.8

REVEL

Benign

0.021

Sift

Benign

0.063

Sift4G

Benign

0.14

Polyphen

0.0

Vest4

0.12

MutPred

0.35

Loss of disorder (P = 0.0531);

MVP

0.043

MPC

0.39

ClinPred

0.040

GERP RS

-1.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.11

gMVP

0.60

Mutation Taster

=95/5

polymorphism

(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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11-372696-G-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