Genetic Variant GK:p.Thr122Ala (chrX-30691149-A-G) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_001205019.2(GK):c.364A>G(p.Thr122Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000896 in 111,561 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000090 ( 0 hom., 0 hem., cov: 23)

Exomes 𝑓: 9.5e-7 ( 0 hom. 0 hem. )

Failed GnomAD Quality Control

Consequence

GK
NM_001205019.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.97

Variant links:

Genes affected

GK (HGNC:4289): (glycerol kinase) The protein encoded by this gene belongs to the FGGY kinase family. This protein is a key enzyme in the regulation of glycerol uptake and metabolism. It catalyzes the phosphorylation of glycerol by ATP, yielding ADP and glycerol-3-phosphate. Mutations in this gene are associated with glycerol kinase deficiency (GKD). Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2011]

GK links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.773

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GK	NM_001205019.2 link	c.364A>G	p.Thr122Ala	missense_variant	Exon 5 of 21	ENST00000427190.6	NP_001191948.1	P32189-3B4DH54

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GK	ENST00000427190.6 link	c.364A>G	p.Thr122Ala	missense_variant	Exon 5 of 21	5	NM_001205019.2	ENSP00000401720.2		P32189-3

Frequencies

GnomAD3 genomes

AF:

0.00000896

AC:

AN:

111561

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33773

show subpopulations

Gnomad AFR

AF:

0.0000326

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

9.53e-7

AC:

AN:

1049786

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

328392

show subpopulations

Gnomad4 AFR exome

AF:

0.0000392

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000896

AC:

AN:

111561

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

33773

show subpopulations

Gnomad4 AFR

AF:

0.0000326

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Sep 26, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.364A>G (p.T122A) alteration is located in exon 5 (coding exon 5) of the GK gene. This alteration results from a A to G substitution at nucleotide position 364, causing the threonine (T) at amino acid position 122 to be replaced by an alanine (A). 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

0.19

BayesDel_addAF

Uncertain

0.10

BayesDel_noAF

Uncertain

0.10

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.31

.;.;T;.;T

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.98

D;D;D;D;D

M_CAP

Pathogenic

0.66

MetaRNN

Pathogenic

0.77

D;D;D;D;D

MetaSVM

Benign

-0.40

MutationAssessor

Uncertain

2.3

M;M;M;M;.

PrimateAI

Uncertain

0.66

PROVEAN

Uncertain

-3.8

D;D;.;D;D

REVEL

Uncertain

0.58

Sift

Benign

0.075

T;T;.;T;D

Sift4G

Uncertain

0.026

D;D;D;D;T

Polyphen

1.0

.;D;.;D;.

Vest4

0.65

MutPred

0.53

Loss of disorder (P = 0.1592);Loss of disorder (P = 0.1592);Loss of disorder (P = 0.1592);Loss of disorder (P = 0.1592);.;

MVP

0.79

MPC

2.3

ClinPred

0.76

GERP RS

5.9

Varity_R

0.72

gMVP

0.79

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

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