Genetic Variant B4GALNT4:p.Gly305Arg (chr11-375701-G-C) – ACMG Classification: Likely_benign (-5 pts)

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4BS2

The NM_178537.5(B4GALNT4):c.913G>C(p.Gly305Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000763 in 1,442,398 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G305V) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000076 ( 0 hom. )

Consequence

B4GALNT4
NM_178537.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.68

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: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.30777818).

BS2

High AC in GnomAdExome4 at 11 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
B4GALNT4	NM_178537.5 link	c.913G>C	p.Gly305Arg	missense_variant	Exon 10 of 20	ENST00000329962.11	NP_848632.2	Q76KP1
B4GALNT4	XM_017017654.2 link	c.637G>C	p.Gly213Arg	missense_variant	Exon 10 of 20		XP_016873143.1
B4GALNT4	XR_001747858.2 link	n.1218G>C		non_coding_transcript_exon_variant	Exon 10 of 18

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
B4GALNT4	ENST00000329962.11 link	c.913G>C	p.Gly305Arg	missense_variant	Exon 10 of 20	1	NM_178537.5	ENSP00000328277.6		Q76KP1
B4GALNT4	ENST00000524443.1 link	n.130G>C		non_coding_transcript_exon_variant	Exon 2 of 3	3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000852

AC:

AN:

234670

AF XY:

0.00000777

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:

0.0000184

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000763

AC:

AN:

1442398

Hom.:

Cov.:

AF XY:

0.00000976

AC XY:

AN XY:

716854

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33366

American (AMR)

AF:

0.00

AC:

AN:

44462

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25864

East Asian (EAS)

AF:

0.00

AC:

AN:

39512

South Asian (SAS)

AF:

0.00

AC:

AN:

85846

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40520

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5722

European-Non Finnish (NFE)

AF:

0.00000994

AC:

AN:

1107160

Other (OTH)

AF:

0.00

AC:

AN:

59946

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.466

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ExAC

AF:

0.0000166

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.037

BayesDel_noAF

Benign

-0.27

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.0079

Eigen

Benign

-0.19

Eigen_PC

Benign

-0.33

FATHMM_MKL

Benign

0.40

LIST_S2

Benign

0.57

M_CAP

Benign

0.073

MetaRNN

Benign

0.31

MetaSVM

Benign

-0.71

MutationAssessor

Benign

1.4

PhyloP100

2.7

PrimateAI

Uncertain

0.54

PROVEAN

Uncertain

-2.6

REVEL

Benign

0.22

Sift

Benign

0.35

Sift4G

Benign

0.45

Polyphen

0.97

Vest4

0.38

MutPred

0.16

Gain of solvent accessibility (P = 0.019);

MVP

0.36

MPC

0.40

ClinPred

0.54

GERP RS

3.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.12

gMVP

0.46

Mutation Taster

=86/14

polymorphism

(source)

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

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chr11-375701-G-C

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over