6-24657814-G-A

Position:

chr6-24657814-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM2PP3_ModerateBS1_Supporting

The NM_016614.3(TDP2):c.515C>T(p.Thr172Ile) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.0000112 in 1,519,956 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000011 ( 0 hom. )

Consequence

TDP2
NM_016614.3 missense, splice_region

Scores

Splicing: ADA: 0.9998

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.05

Variant links:

Genes affected

TDP2 (HGNC:17768): (tyrosyl-DNA phosphodiesterase 2) This gene encodes a member of a superfamily of divalent cation-dependent phosphodiesterases. The encoded protein associates with CD40, tumor necrosis factor (TNF) receptor-75 and TNF receptor associated factors (TRAFs), and inhibits nuclear factor-kappa-B activation. This protein has sequence and structural similarities with APE1 endonuclease, which is involved in both DNA repair and the activation of transcription factors. [provided by RefSeq, Jul 2008]

TDP2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF, max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

BS1

Variant frequency is greater than expected in population amr. gnomad4_exome allele frequency = 0.000011 (15/1367792) while in subpopulation AMR AF= 0.000313 (10/31980). AF 95% confidence interval is 0.000169. There are 0 homozygotes in gnomad4_exome. There are 8 alleles in male gnomad4_exome subpopulation. Median coverage is 20. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TDP2	NM_016614.3 linkuse as main transcript	c.515C>T	p.Thr172Ile	missense_variant, splice_region_variant	4/7	ENST00000378198.9	NP_057698.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TDP2	ENST00000378198.9 linkuse as main transcript	c.515C>T	p.Thr172Ile	missense_variant, splice_region_variant	4/7	1	NM_016614.3	ENSP00000367440	P1	O95551-1
TDP2	ENST00000341060.3 linkuse as main transcript	c.341C>T	p.Thr114Ile	missense_variant, splice_region_variant	3/6	1		ENSP00000345345
TDP2	ENST00000478285.1 linkuse as main transcript	n.702C>T		splice_region_variant, non_coding_transcript_exon_variant	2/3	2
TDP2	ENST00000478507.1 linkuse as main transcript	n.320-4661C>T		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152164

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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

GnomAD3 exomes

AF:

0.0000422

AC:

AN:

213224

Hom.:

AF XY:

0.0000428

AC XY:

AN XY:

116902

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000364

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:

0.00

Gnomad OTH exome

AF:

0.000203

GnomAD4 exome

AF:

0.0000110

AC:

AN:

1367792

Hom.:

Cov.:

AF XY:

0.0000117

AC XY:

AN XY:

684054

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000313

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000266

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.51e-7

Gnomad4 OTH exome

AF:

0.0000529

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152164

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74338

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000131

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

Alfa

AF:

0.000130

Hom.:

Bravo

AF:

0.0000604

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 07, 2021

The c.515C>T (p.T172I) alteration is located in exon 4 (coding exon 4) of the TDP2 gene. This alteration results from a C to T substitution at nucleotide position 515, causing the threonine (T) at amino acid position 172 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.18

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.45

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.13

T;T

Eigen

Uncertain

0.34

Eigen_PC

Uncertain

0.48

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.87

D;D

M_CAP

Benign

0.014

MetaRNN

Benign

0.32

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.4

L;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Benign

0.41

PROVEAN

Benign

-1.4

N;N

REVEL

Benign

0.082

Sift

Benign

0.30

T;T

Sift4G

Benign

0.35

T;T

Polyphen

0.31

B;.

Vest4

0.51

MutPred

0.41

Gain of sheet (P = 0.0344);.;

MVP

0.49

MPC

0.21

ClinPred

0.081

GERP RS

6.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.20

gMVP

0.47

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.98

SpliceAI score (max)

0.54

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.54

Position offset: -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