rs121909448

Variant names:

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM2PP3_StrongPP5

The NM_145262.4(GLYCTK):c.1478T>G(p.Phe493Cys) variant causes a missense change. The variant allele was found at a frequency of 0.000102 in 1,614,002 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00010 ( 0 hom. )

Consequence

GLYCTK
NM_145262.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:3U:2O:1

Conservation

PhyloP100: 5.91

Variant links:

Genes affected

GLYCTK (HGNC:24247): (glycerate kinase) This locus encodes a member of the glycerate kinase type-2 family. The encoded enzyme catalyzes the phosphorylation of (R)-glycerate and may be involved in serine degradation and fructose metabolism. Decreased activity of the encoded enzyme may be associated with the disease D-glyceric aciduria. Alternatively spliced transcript variants have been described. [provided by RefSeq, Jan 2009]

GLYCTK links:

GLYCTK-AS1 (HGNC:41043): (GLYCTK antisense RNA 1)

GLYCTK-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 7 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.974

PP5

Variant 3-52293032-T-G is Pathogenic according to our data. Variant chr3-52293032-T-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 30836.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=2, Uncertain_significance=2, not_provided=1}. Variant chr3-52293032-T-G is described in Lovd as [Likely_pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GLYCTK	NM_145262.4 link	c.1478T>G	p.Phe493Cys	missense_variant	Exon 5 of 5	ENST00000436784.7	NP_660305.2	Q8IVS8-1A1LQE8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GLYCTK	ENST00000436784.7 link	c.1478T>G	p.Phe493Cys	missense_variant	Exon 5 of 5	1	NM_145262.4	ENSP00000389175.2		Q8IVS8-1

Frequencies

GnomAD3 genomes

AF:

0.0000920

AC:

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000327

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000179

AC:

AN:

251236

Hom.:

AF XY:

0.000169

AC XY:

AN XY:

135830

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000607

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000109

Gnomad SAS exome

AF:

0.000359

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000968

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000103

AC:

150

AN:

1461830

Hom.:

Cov.:

AF XY:

0.000110

AC XY:

AN XY:

727218

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000514

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.000197

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000926

Gnomad4 OTH exome

AF:

0.0000828

GnomAD4 genome

AF:

0.0000920

AC:

AN:

152172

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74348

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000327

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000192

Gnomad4 SAS

AF:

0.000414

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000124

Hom.:

Bravo

AF:

0.0000945

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.000157

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:3Uncertain:2Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

D-Glyceric aciduria

Pathogenic:2Uncertain:1Other:1

Mar 05, 2018

Genomic Research Center, Shahid Beheshti University of Medical Sciences

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Sep 08, 2021

Revvity Omics, Revvity

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dec 01, 2010

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Universitäts-Kinderspital Zürich

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

- -

not provided

Pathogenic:1Uncertain:1

Jun 26, 2023

GeneDx

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Published functional studies demonstrate F493C damages protein expression with no enzymatic activity (Sass et al., 2010); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 31589614, 20949620, 31980526, 34426522) -

Oct 15, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces phenylalanine, which is neutral and non-polar, with cysteine, which is neutral and slightly polar, at codon 493 of the GLYCTK protein (p.Phe493Cys). This variant is present in population databases (rs121909448, gnomAD 0.06%). This missense change has been observed in individual(s) with D-glyceric aciduria (PMID: 20949620). ClinVar contains an entry for this variant (Variation ID: 30836). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on GLYCTK protein function. Experimental studies have shown that this missense change affects GLYCTK function (PMID: 20949620). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.76

BayesDel_addAF

Pathogenic

0.17

BayesDel_noAF

Pathogenic

0.37

CADD

Pathogenic

DANN

Uncertain

0.99

DEOGEN2

Pathogenic

0.83

Eigen

Uncertain

0.65

Eigen_PC

Uncertain

0.54

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.87

M_CAP

Pathogenic

0.33

MetaRNN

Pathogenic

0.97

MetaSVM

Uncertain

0.73

MutationAssessor

Pathogenic

3.9

PrimateAI

Uncertain

0.59

PROVEAN

Pathogenic

-6.6

REVEL

Pathogenic

0.91

Sift

Uncertain

0.0010

Sift4G

Pathogenic

0.0010

Polyphen

1.0

Vest4

0.97

MVP

0.89

MPC

0.62

ClinPred

0.79

GERP RS

5.2

Varity_R

0.87

gMVP

0.93

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

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over