Genetic Variant POGLUT1:p.Gly23Cys (chr3-119469088-G-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_152305.3(POGLUT1):c.67G>T(p.Gly23Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000687 in 1,455,086 control chromosomes in the GnomAD database, with no homozygous occurrence. 13/22 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 variant affecting the same amino acid position, but resulting in a different missense (i.e. G23S) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

POGLUT1
NM_152305.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.08

Publications

0 publications found

Variant links:

Genes affected

POGLUT1 (HGNC:22954): (protein O-glucosyltransferase 1) This gene encodes a protein with both O-glucosyltransferase and O-xylosyltransferase activity which localizes to the lumen of the endoplasmic reticulum. This protein has a carboxy-terminal KTEL motif which is predicted to function as an endoplasmic reticulum retention signal. This gene is an essential regulator of Notch signalling and likely plays a role in cell fate and tissue formation during development. It may also play a role in the pathogenesis of leukemia. Mutations in this gene have been associated with the autosomal dominant genodermatosis Dowling-Degos disease 4. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2014]

POGLUT1 Gene-Disease associations (from GenCC):

autosomal recessive limb-girdle muscular dystrophy
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
Dowling-Degos disease 4
Inheritance: AD Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
autosomal recessive limb-girdle muscular dystrophy type 2R1
Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics
Dowling-Degos disease
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

POGLUT1 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
POGLUT1	NM_152305.3 link	c.67G>T	p.Gly23Cys	missense_variant	Exon 1 of 11	ENST00000295588.9	NP_689518.1	Q8NBL1
POGLUT1	NR_024265.2 link	n.126G>T		non_coding_transcript_exon_variant	Exon 1 of 11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
POGLUT1	ENST00000295588.9 link	c.67G>T	p.Gly23Cys	missense_variant	Exon 1 of 11	1	NM_152305.3	ENSP00000295588.4		Q8NBL1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.87e-7

AC:

AN:

1455086

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

723780

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33330

American (AMR)

AF:

0.00

AC:

AN:

44414

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26034

East Asian (EAS)

AF:

0.00

AC:

AN:

39452

South Asian (SAS)

AF:

0.00

AC:

AN:

85638

European-Finnish (FIN)

AF:

0.0000197

AC:

AN:

50838

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4824

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1110554

Other (OTH)

AF:

0.00

AC:

AN:

60002

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.275

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.087

BayesDel_noAF

Benign

-0.36

CADD

Benign

(source)

DANN

Benign

0.95

DEOGEN2

Benign

0.076

Eigen

Uncertain

0.20

Eigen_PC

Benign

0.18

FATHMM_MKL

Benign

0.30

LIST_S2

Benign

0.73

M_CAP

Benign

0.0089

MetaRNN

Uncertain

0.51

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.90

PhyloP100

1.1

PrimateAI

Uncertain

0.59

PROVEAN

Benign

0.50

REVEL

Benign

0.16

Sift

Uncertain

0.019

Sift4G

Uncertain

0.049

Polyphen

1.0

Vest4

0.60

MutPred

0.29

Loss of relative solvent accessibility (P = 0.0071);

MVP

0.45

MPC

0.61

ClinPred

0.53

GERP RS

3.1

PromoterAI

-0.074

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.6

Varity_R

0.18

gMVP

0.62

Mutation Taster

=93/7

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

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over