Genetic Variant GBGT1:p.Arg296Trp (chr9-133153735-G-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_021996.6(GBGT1):c.886C>T(p.Arg296Trp) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000583 in 1,613,482 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.00029 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000034 ( 0 hom. )

Consequence

GBGT1
NM_021996.6 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.43

Publications

2 publications found

Variant links:

Genes affected

GBGT1 (HGNC:20460): (globoside alpha-1,3-N-acetylgalactosaminyltransferase 1 (FORS blood group)) This gene encodes a glycosyltransferase that plays a role in the synthesis of Forssman glycolipid (FG), a member of the globoseries glycolipid family. Glycolipids such as FG form attachment sites for the binding of pathogens to cells; expression of this protein may determine host tropism to microorganisms. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2013]

GBGT1 links:

ENSG00000285245 (HGNC:):

ENSG00000285245 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.0790354).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_021996.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
GBGT1	NM_021996.6	MANE Select	c.886C>T	p.Arg296Trp	missense	Exon 7 of 7	NP_068836.2
GBGT1	NM_001282632.2		c.835C>T	p.Arg279Trp	missense	Exon 6 of 6	NP_001269561.1
GBGT1	NM_001288572.2		c.745C>T	p.Arg249Trp	missense	Exon 7 of 7	NP_001275501.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
GBGT1	ENST00000372040.9	TSL:1 MANE Select	c.886C>T	p.Arg296Trp	missense	Exon 7 of 7	ENSP00000361110.3
GBGT1	ENST00000470431.5	TSL:1	c.*1439C>T		3_prime_UTR	Exon 6 of 6	ENSP00000495017.1
ENSG00000285245	ENST00000647146.1		c.396+1443C>T		intron	N/A	ENSP00000493691.1

Frequencies

GnomAD3 genomes

AF:

0.000289

AC:

AN:

152200

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00104

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

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:

0.00

GnomAD2 exomes

AF:

0.0000838

AC:

AN:

250580

AF XY:

0.0000665

show subpopulations

Gnomad AFR exome

AF:

0.000923

Gnomad AMR exome

AF:

0.0000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000265

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000342

AC:

AN:

1461164

Hom.:

Cov.:

AF XY:

0.0000330

AC XY:

AN XY:

726840

show subpopulations

African (AFR)

AF:

0.000926

AC:

AN:

33474

American (AMR)

AF:

0.0000448

AC:

AN:

44666

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26082

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86172

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53204

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.0000135

AC:

AN:

1111734

Other (OTH)

AF:

0.0000166

AC:

AN:

60372

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.474

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000289

AC:

AN:

152318

Hom.:

Cov.:

AF XY:

0.000242

AC XY:

AN XY:

74474

show subpopulations

African (AFR)

AF:

0.00103

AC:

AN:

41570

American (AMR)

AF:

0.0000654

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68030

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.507

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000350

Hom.:

Bravo

AF:

0.000295

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000107

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.40

BayesDel_noAF

Benign

-0.38

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.10

Eigen

Benign

0.15

Eigen_PC

Uncertain

0.26

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.95

M_CAP

Benign

0.080

MetaRNN

Benign

0.079

MetaSVM

Benign

-0.74

PhyloP100

7.4

PROVEAN

Uncertain

-2.5

REVEL

Benign

0.25

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0010

Polyphen

0.84

Vest4

0.23

MVP

0.46

MPC

0.40

ClinPred

0.20

GERP RS

4.5

Varity_R

0.40

gMVP

0.54

Mutation Taster

=70/30

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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over