Variant 4-155907791-A-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_005651.4(TDO2):c.302A>G(p.His101Arg) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.0000031 in 1,611,374 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

TDO2
NM_005651.4 missense, splice_region

Scores

Splicing: ADA: 0.9449

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.14

Variant links:

Genes affected

TDO2 (HGNC:11708): (tryptophan 2,3-dioxygenase) This gene encodes a heme enzyme that plays a critical role in tryptophan metabolism by catalyzing the first and rate-limiting step of the kynurenine pathway. Increased activity of the encoded protein and subsequent kynurenine production may also play a role in cancer through the suppression of antitumor immune responses, and single nucleotide polymorphisms in this gene may be associated with autism. [provided by RefSeq, Feb 2012]

TDO2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.27905023).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TDO2	NM_005651.4 linkuse as main transcript	c.302A>G	p.His101Arg	missense_variant, splice_region_variant	4/12	ENST00000536354.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
TDO2	ENST00000536354.3 linkuse as main transcript	c.302A>G	p.His101Arg	missense_variant, splice_region_variant	4/12	1	NM_005651.4	P1
TDO2	ENST00000512584.5 linkuse as main transcript	n.1972A>G		splice_region_variant, non_coding_transcript_exon_variant	1/9	1
TDO2	ENST00000506072.5 linkuse as main transcript	c.-20A>G		splice_region_variant, 5_prime_UTR_variant	6/8	3
TDO2	ENST00000507590.5 linkuse as main transcript	c.-20A>G		splice_region_variant, 5_prime_UTR_variant	5/7	4

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152226

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000206

AC:

AN:

1459148

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726016

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152226

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74378

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

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:

0.00

Bravo

AF:

0.0000340

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 19, 2022

The c.302A>G (p.H101R) alteration is located in exon 4 (coding exon 4) of the TDO2 gene. This alteration results from a A to G substitution at nucleotide position 302, causing the histidine (H) at amino acid position 101 to be replaced by an arginine (R). 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

0.091

BayesDel_addAF

Uncertain

0.058

BayesDel_noAF

Benign

-0.15

Cadd

Benign

Dann

Uncertain

0.98

DEOGEN2

Benign

0.42

Eigen

Uncertain

0.26

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Pathogenic

0.98

M_CAP

Benign

0.0051

MetaRNN

Benign

0.28

MetaSVM

Benign

-0.94

MutationAssessor

Benign

1.3

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.67

PROVEAN

Benign

-2.1

REVEL

Benign

0.26

Sift

Benign

0.33

Sift4G

Benign

0.64

Polyphen

0.59

Vest4

0.25

MVP

0.28

MPC

0.030

ClinPred

0.25

GERP RS

6.0

Varity_R

0.48

gMVP

0.47

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.94

dbscSNV1_RF

Pathogenic

0.81

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