17-75763032-G-T

Variant names:

• chr17-75763032-G-T
• rs80084721
• NM_000154.2:c.593C>A

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_000154.2(GALK1):​c.593C>A​(p.Ala198Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,216 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: GALK1 NM_000154.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.56

Genes affected

GALK1 (HGNC:4118): (galactokinase 1) Galactokinase is a major enzyme for the metabolism of galactose and its deficiency causes congenital cataracts during infancy and presenile cataracts in the adult population. [provided by RefSeq, Jul 2008]

ACMG classification

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, 0.941

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GALK1	NM_000154.2	c.593C>A	p.Ala198Glu	missense_variant	Exon 4 of 8	ENST00000588479.6	NP_000145.1
GALK1	NM_001381985.1	c.593C>A	p.Ala198Glu	missense_variant	Exon 4 of 9		NP_001368914.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GALK1	ENST00000588479.6	c.593C>A	p.Ala198Glu	missense_variant	Exon 4 of 8	1	NM_000154.2	ENSP00000465930.1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152216 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000241

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: AC0 AF: 0.00 AC: 0 AN: 1460612 Hom.: 0 Cov.: 50 AF XY: 0.00 AC XY: 0 AN XY: 726666

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152216 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 74360

Gnomad4 AFR AF: 0.0000241

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

ExAC AF: 0.00000824 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.46	D
BayesDel_noAF	Pathogenic	0.42
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.89	D;.;D
Eigen	Pathogenic	0.96
Eigen_PC	Pathogenic	0.89
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.86	.;D;D
M_CAP	Uncertain	0.25	D
MetaRNN	Pathogenic	0.94	D;D;D
MetaSVM	Pathogenic	0.85	D
MutationAssessor	Pathogenic	4.5	H;.;H
PrimateAI	Uncertain	0.57	T
PROVEAN	Pathogenic	-4.5	D;.;.
REVEL	Pathogenic	0.92
Sift	Uncertain	0.0010	D;.;.
Sift4G	Uncertain	0.0040	D;D;D
Polyphen		0.99	D;.;D
Vest4		0.98
MutPred		0.83		Loss of ubiquitination at K195 (P = 0.0834);.;Loss of ubiquitination at K195 (P = 0.0834);
MVP		0.93
MPC		0.65
ClinPred		1.0	D
GERP RS		5.5
Varity_R		1.0
gMVP		0.97

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

Other links and lift over

dbSNP: rs80084721; hg19: chr17-73759113;