dbSNP rs180704294: TKT:c.339+3A>C (chr3-53241129-T-G) – ACMG Classification: Benign (-16 pts)

Variant summary

Our verdict is Benign. Variant got -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS2

The NM_001064.4(TKT):c.339+3A>C variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000757 in 1,551,760 control chromosomes in the GnomAD database, including 13 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0044 ( 6 hom., cov: 33)

Exomes 𝑓: 0.00036 ( 7 hom. )

Consequence

TKT
NM_001064.4 splice_region, intron

Scores

Splicing: ADA: 0.6668

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -0.192

Variant links:

Genes affected

TKT (HGNC:11834): (transketolase) This gene encodes a thiamine-dependent enzyme which plays a role in the channeling of excess sugar phosphates to glycolysis in the pentose phosphate pathway. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Apr 2012]

TKT links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -16 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.54).

BP6

Variant 3-53241129-T-G is Benign according to our data. Variant chr3-53241129-T-G is described in ClinVar as [Likely_benign]. Clinvar id is 445900.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS2

High Homozygotes in GnomAd4 at 6 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TKT	NM_001064.4 link	c.339+3A>C		splice_region_variant, intron_variant	Intron 3 of 13	ENST00000462138.6	NP_001055.1	P29401-1V9HWD9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TKT	ENST00000462138.6 link	c.339+3A>C		splice_region_variant, intron_variant	Intron 3 of 13	1	NM_001064.4	ENSP00000417773.1		P29401-1

Frequencies

GnomAD3 genomes

AF:

0.00438

AC:

667

AN:

152192

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0151

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00203

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:

0.0000294

Gnomad OTH

AF:

0.00287

GnomAD3 exomes

AF:

0.00108

AC:

209

AN:

193936

Hom.:

AF XY:

0.000758

AC XY:

AN XY:

106836

show subpopulations

Gnomad AFR exome

AF:

0.0149

Gnomad AMR exome

AF:

0.000923

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000106

Gnomad OTH exome

AF:

0.000690

GnomAD4 exome

AF:

0.000362

AC:

507

AN:

1399450

Hom.:

Cov.:

AF XY:

0.000271

AC XY:

188

AN XY:

694980

show subpopulations

Gnomad4 AFR exome

AF:

0.0135

Gnomad4 AMR exome

AF:

0.00118

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000263

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000193

Gnomad4 OTH exome

AF:

0.000934

GnomAD4 genome

AF:

0.00438

AC:

667

AN:

152310

Hom.:

Cov.:

AF XY:

0.00461

AC XY:

343

AN XY:

74480

show subpopulations

Gnomad4 AFR

AF:

0.0151

Gnomad4 AMR

AF:

0.00203

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00284

Alfa

AF:

0.00218

Hom.:

Bravo

AF:

0.00509

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

May 30, 2017

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dec 31, 2019

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.54

CADD

Benign

DANN

Benign

0.73

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.8

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.67

dbscSNV1_RF

Benign

0.53

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over