9-34645685-CTTTTTTT-CTTTTTTTTTT

Variant names:

• chr9-34645685-C-CTTT
• rs201344398
• ENST00000605275.1:n.209-992_209-991insTTT

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The ENST00000605275.1(GALT):​n.209-992_209-991insTTT variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000349 in 137,536 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.00035 (0 hom., cov: 27)
• Consequence: GALT ENST00000605275.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.520

Genes affected

GALT (HGNC:4135): (galactose-1-phosphate uridylyltransferase) Galactose-1-phosphate uridyl transferase (GALT) catalyzes the second step of the Leloir pathway of galactose metabolism, namely the conversion of UDP-glucose + galactose-1-phosphate to glucose-1-phosphate + UDP-galactose. The absence of this enzyme results in classic galactosemia in humans and can be fatal in the newborn period if lactose is not removed from the diet. The pathophysiology of galactosemia has not been clearly defined. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Apr 2012]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GALT	ENST00000605275.1	n.209-992_209-991insTTT		intron_variant	Intron 1 of 1	3

Frequencies

GnomAD3 genomes AF: 0.000334 AC: 46 AN: 137530 Hom.: 0 Cov.: 27

Gnomad AFR AF: 0.00117

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: 0.000253

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000157

Gnomad OTH AF: 0.00

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.000349 AC: 48 AN: 137536 Hom.: 0 Cov.: 27 AF XY: 0.000332 AC XY: 22 AN XY: 66318

Gnomad4 AFR AF: 0.00123

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.000253

Gnomad4 NFE AF: 0.0000157

Gnomad4 OTH AF: 0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs201344398; hg19: chr9-34645682;