chr17-75763146-G-C

Variant names:

• chr17-75763146-G-C
• rs575077063
• NM_000154.2:c.479C>G

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_000154.2(GALK1):​c.479C>G​(p.Ser160Trp) variant causes a missense change. The variant allele was found at a frequency of 0.00000754 in 1,459,364 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. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S160L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000075 (0 hom.)
• Consequence: GALK1 NM_000154.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.34
• Publications: 1 publications found

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]

GALK1 Gene-Disease associations (from GenCC):

• galactokinase deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Myriad Women’s Health, Labcorp Genetics (formerly Invitae), G2P, Orphanet, ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.747

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GALK1	NM_000154.2	c.479C>G	p.Ser160Trp	missense_variant	Exon 4 of 8	ENST00000588479.6	NP_000145.1
GALK1	NM_001381985.1	c.479C>G	p.Ser160Trp	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.479C>G	p.Ser160Trp	missense_variant	Exon 4 of 8	1	NM_000154.2	ENSP00000465930.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000754 AC: 11 AN: 1459364 Hom.: 0 Cov.: 50 AF XY: 0.00000964 AC XY: 7 AN XY: 726072

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39698

South Asian (SAS) AF: 0.00 AC: 0 AN: 86252

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50948

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00000899 AC: 10 AN: 1111980

Other (OTH) AF: 0.0000166 AC: 1 AN: 60380

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000307 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.23
BayesDel_addAF	Uncertain	0.092	D
BayesDel_noAF	Benign	-0.11
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.87	D;D
Eigen	Uncertain	0.51
Eigen_PC	Uncertain	0.44
FATHMM_MKL	Uncertain	0.85	D
LIST_S2	Uncertain	0.92	.;D
M_CAP	Uncertain	0.20	D
MetaRNN	Pathogenic	0.75	D;D
MetaSVM	Uncertain	0.50	D
MutationAssessor	Uncertain	2.9	M;M
PhyloP100		4.3
PrimateAI	Uncertain	0.50	T
PROVEAN	Uncertain	-3.6	D;.
REVEL	Uncertain	0.44
Sift	Uncertain	0.0040	D;.
Sift4G	Uncertain	0.014	D;D
Polyphen		0.99	D;D
Vest4		0.49
MutPred		0.39		Loss of glycosylation at S160 (P = 0.0076);Loss of glycosylation at S160 (P = 0.0076);
MVP		0.93
MPC		0.58
ClinPred		0.97	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.84
gMVP		0.50
Mutation Taster		=87/13	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.10		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: rs575077063; hg19: chr17-73759227;