Genetic Variant GLYCTK:p.Arg22Arg (chr3-52290408-G-T) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_StrongBP7

The NM_145262.4(GLYCTK):c.66G>T(p.Arg22Arg) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,457,258 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

GLYCTK
NM_145262.4 synonymous

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.487

Publications

0 publications found

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:

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new If you want to explore the variant's impact on the transcript NM_145262.4, check out the Mutation Effect Viewer. This is especially useful for frameshift variants or if you want to visualize the effect of exon loss / intron retention.

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.81).

BP7

Synonymous conserved (PhyloP=-0.487 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_145262.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GLYCTK	NM_145262.4	MANE Select	c.66G>T	p.Arg22Arg	synonymous	Exon 2 of 5	NP_660305.2
GLYCTK	NM_001437621.1		c.66G>T	p.Arg22Arg	synonymous	Exon 1 of 4	NP_001424550.1
GLYCTK	NM_001144951.2		c.66G>T	p.Arg22Arg	synonymous	Exon 2 of 4	NP_001138423.1	Q8IVS8-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GLYCTK	ENST00000436784.7	TSL:1 MANE Select	c.66G>T	p.Arg22Arg	synonymous	Exon 2 of 5	ENSP00000389175.2	Q8IVS8-1
GLYCTK	ENST00000477382.2	TSL:1	c.66G>T	p.Arg22Arg	synonymous	Exon 2 of 4	ENSP00000419008.1
GLYCTK	ENST00000473032.5	TSL:1	c.66G>T	p.Arg22Arg	synonymous	Exon 2 of 5	ENSP00000418951.1	Q8IVS8-7

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000411

AC:

AN:

243520

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000906

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1457258

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

725150

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:

33474

American (AMR)

AF:

0.00

AC:

AN:

44694

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26116

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.00

AC:

AN:

86222

European-Finnish (FIN)

AF:

0.0000204

AC:

AN:

49118

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5676

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111920

Other (OTH)

AF:

0.00

AC:

AN:

60344

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.00666416), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.325

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 v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.81

CADD

Benign

4.6

(source)

DANN

Benign

0.79

PhyloP100

-0.49

PromoterAI

0.018

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over