7-144582548-C-T

Position:

• chr7-144582548-C-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_022445.4(TPK1):​c.501+8875G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0909 in 152,098 control chromosomes in the GnomAD database, including 1,000 homozygotes. 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: 𝑓 0.091 (1000 hom., cov: 32)
• Consequence: TPK1 NM_022445.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.646

Genes affected

TPK1 (HGNC:17358): (thiamin pyrophosphokinase 1) The protein encoded by this gene functions as a homodimer and catalyzes the conversion of thiamine to thiamine pyrophosphate, a cofactor for some enzymes of the glycolytic and energy production pathways. Defects in this gene are a cause of thiamine metabolism dysfunction syndrome-5. [provided by RefSeq, Apr 2017]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.192 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TPK1	NM_022445.4	c.501+8875G>A		intron_variant		ENST00000360057.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TPK1	ENST00000360057.7	c.501+8875G>A		intron_variant		1	NM_022445.4	P1

Frequencies

GnomAD3 genomes AF: 0.0908 AC: 13798 AN: 151980 Hom.: 992 Cov.: 32

Gnomad AFR AF: 0.195

Gnomad AMI AF: 0.00877

Gnomad AMR AF: 0.0611

Gnomad ASJ AF: 0.114

Gnomad EAS AF: 0.00193

Gnomad SAS AF: 0.0421

Gnomad FIN AF: 0.0412

Gnomad MID AF: 0.162

Gnomad NFE AF: 0.0514

Gnomad OTH AF: 0.0987

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

GnomAD4 genome AF: 0.0909 AC: 13828 AN: 152098 Hom.: 1000 Cov.: 32 AF XY: 0.0882 AC XY: 6562 AN XY: 74394

Gnomad4 AFR AF: 0.195

Gnomad4 AMR AF: 0.0609

Gnomad4 ASJ AF: 0.114

Gnomad4 EAS AF: 0.00193

Gnomad4 SAS AF: 0.0419

Gnomad4 FIN AF: 0.0412

Gnomad4 NFE AF: 0.0514

Gnomad4 OTH AF: 0.0991

Alfa AF: 0.0635 Hom.: 106

Bravo AF: 0.0983

Asia WGS AF: 0.0440 AC: 152 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	6.6
DANN	Benign	0.81

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: rs17170147; hg19: chr7-144279641;