13-102789037-T-G

Variant names:

• chr13-102789037-T-G
• rs990693871
• NM_024089.3:c.1268A>C

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_024089.3(POGLUT2):​c.1268A>C​(p.Lys423Thr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: POGLUT2 NM_024089.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.23
• Publications: 0 publications found

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]

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2666089).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
POGLUT2	NM_024089.3	c.1268A>C	p.Lys423Thr	missense_variant	Exon 7 of 10	ENST00000376004.5	NP_076994.2
POGLUT2	NM_001439010.1	c.1268A>C	p.Lys423Thr	missense_variant	Exon 7 of 9		NP_001425939.1
POGLUT2	NM_001318732.2	c.611A>C	p.Lys204Thr	missense_variant	Exon 8 of 11		NP_001305661.1
POGLUT2	XM_047430604.1	c.611A>C	p.Lys204Thr	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	c.1268A>C	p.Lys423Thr	missense_variant	Exon 7 of 10	1	NM_024089.3	ENSP00000365172.4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Nov 07, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1268A>C (p.K423T) alteration is located in exon 7 (coding exon 7) of the KDELC1 gene. This alteration results from a A to C substitution at nucleotide position 1268, causing the lysine (K) at amino acid position 423 to be replaced by a threonine (T). 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	0.079
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.10	T
Eigen	Benign	-0.011
Eigen_PC	Benign	0.10
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.86	D
M_CAP	Benign	0.0066	T
MetaRNN	Benign	0.27	T
MetaSVM	Benign	-1.0	T
PhyloP100		4.2
PrimateAI	Benign	0.34	T
PROVEAN	Uncertain	-3.3	D
REVEL	Benign	0.078
Sift	Benign	0.056	T
Sift4G	Benign	0.15	T
Polyphen		0.055	B
Vest4		0.46
MutPred		0.46		Gain of ubiquitination at K426 (P = 0.0357);
MVP		0.36
MPC		0.22
ClinPred		0.46	T
GERP RS		5.7
Varity_R		0.22
gMVP		0.52
Mutation Taster		=72/28	polymorphism

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

Other links and lift over

dbSNP: rs990693871; hg19: chr13-103441387;