Variant chr6-18133860-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_000367.5(TPMT):c.524G>A(p.Gly175Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000315 in 1,461,506 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.000031 ( 0 hom. )

Consequence

TPMT
NM_000367.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.25

Variant links:

Genes affected

TPMT (HGNC:12014): (thiopurine S-methyltransferase) This gene encodes the enzyme that metabolizes thiopurine drugs via S-adenosyl-L-methionine as the S-methyl donor and S-adenosyl-L-homocysteine as a byproduct. Thiopurine drugs such as 6-mercaptopurine are used as chemotherapeutic agents. Genetic polymorphisms that affect this enzymatic activity are correlated with variations in sensitivity and toxicity to such drugs within individuals, causing thiopurine S-methyltransferase deficiency. Related pseudogenes have been identified on chromosomes 3, 18 and X. [provided by RefSeq, Aug 2014]

TPMT links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.055451334).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TPMT	NM_000367.5 linkuse as main transcript	c.524G>A	p.Gly175Glu	missense_variant	7/9	ENST00000309983.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TPMT	ENST00000309983.5 linkuse as main transcript	c.524G>A	p.Gly175Glu	missense_variant	7/9	1	NM_000367.5	P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000557

AC:

AN:

251414

Hom.:

AF XY:

0.0000294

AC XY:

AN XY:

135892

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.0000879

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.0000315

AC:

AN:

1461506

Hom.:

Cov.:

AF XY:

0.0000275

AC XY:

AN XY:

727070

show subpopulations

Gnomad4 AFR exome

AF:

0.00

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:

0.0000936

Gnomad4 NFE exome

AF:

0.0000306

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000644

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.0000824

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

Jul 13, 2021

The c.524G>A (p.G175E) alteration is located in exon 7 (coding exon 6) of the TPMT gene. This alteration results from a G to A substitution at nucleotide position 524, causing the glycine (G) at amino acid position 175 to be replaced by a glutamic acid (E). 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

0.14

BayesDel_addAF

Benign

-0.38

BayesDel_noAF

Benign

-0.58

CADD

Benign

2.0

DANN

Benign

0.20

DEOGEN2

Benign

0.095

Eigen

Benign

-0.99

Eigen_PC

Benign

-0.87

FATHMM_MKL

Benign

0.032

LIST_S2

Benign

0.52

M_CAP

Benign

0.0070

MetaRNN

Benign

0.055

MetaSVM

Benign

-0.96

MutationAssessor

Benign

-1.0

MutationTaster

Benign

1.0

PrimateAI

Benign

0.28

PROVEAN

Benign

0.91

REVEL

Benign

0.15

Sift

Benign

1.0

Sift4G

Benign

1.0

Polyphen

0.0020

Vest4

0.057

MutPred

0.46

Gain of methylation at K176 (P = 0.125);

MVP

0.49

MPC

0.18

ClinPred

0.029

GERP RS

4.2

Varity_R

0.081

gMVP

0.59

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

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