Genetic Variant NM_024089.3:c.1223A>G (chr13-102789082-T-C) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_024089.3(POGLUT2):c.1223A>G(p.Tyr408Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000028 in 1,461,838 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.000028 ( 1 hom. )

Consequence

POGLUT2
NM_024089.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.02

Variant links:

Genes affected

POGLUT2 (HGNC:19350): (protein O-glucosyltransferase 2) This gene encodes a protein product localized to the lumen of the endoplasmic reticulum. As a member of the endoplasmic reticulum protein family the encoded protein contains a Lys-Asp-Glu-Leu or KDEL motif located at the extreme C-terminus which prevents all endoplasmic reticulum resident proteins from being secreted. Proteins carrying this motif are bound by a receptor in the Golgi apparatus so that the receptor-ligand complex returns to the endoplasmic reticulum. A processed non-transcribed pseudogene located in an intron of a sodium transporter gene on chromosome 5 has been defined for this gene. This gene has multiple transcript variants which are predicted to encode distinct isoforms. [provided by RefSeq, Jan 2016]

POGLUT2 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.983

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
POGLUT2	NM_024089.3 link	c.1223A>G	p.Tyr408Cys	missense_variant	Exon 7 of 10	ENST00000376004.5	NP_076994.2	Q6UW63
POGLUT2	NM_001318732.2 link	c.566A>G	p.Tyr189Cys	missense_variant	Exon 8 of 11		NP_001305661.1	Q6UW63
POGLUT2	XM_005254075.4 link	c.1223A>G	p.Tyr408Cys	missense_variant	Exon 7 of 9		XP_005254132.1
POGLUT2	XM_047430604.1 link	c.566A>G	p.Tyr189Cys	missense_variant	Exon 5 of 8		XP_047286560.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
POGLUT2	ENST00000376004.5 link	c.1223A>G	p.Tyr408Cys	missense_variant	Exon 7 of 10	1	NM_024089.3	ENSP00000365172.4		Q6UW63

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.0000280

AC:

AN:

1461838

Hom.:

Cov.:

AF XY:

0.0000261

AC XY:

AN XY:

727234

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000351

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

Cov.:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 13, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1223A>G (p.Y408C) alteration is located in exon 7 (coding exon 7) of the KDELC1 gene. This alteration results from a A to G substitution at nucleotide position 1223, causing the tyrosine (Y) at amino acid position 408 to be replaced by a cysteine (C). 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

Pathogenic

0.70

BayesDel_addAF

Pathogenic

0.35

BayesDel_noAF

Pathogenic

0.26

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.32

Eigen

Pathogenic

0.96

Eigen_PC

Pathogenic

0.90

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Pathogenic

0.98

M_CAP

Benign

0.079

MetaRNN

Pathogenic

0.98

MetaSVM

Uncertain

0.12

PrimateAI

Pathogenic

0.81

PROVEAN

Pathogenic

-8.1

REVEL

Pathogenic

0.86

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

1.0

Vest4

0.99

MutPred

0.93

Loss of ubiquitination at K412 (P = 0.1564);

MVP

0.89

MPC

0.63

ClinPred

1.0

GERP RS

5.7

Varity_R

0.91

gMVP

0.96

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

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over