1-39841913-G-A

Position:

chr1-39841913-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The NM_017646.6(TRIT1):c.1235C>T(p.Ala412Val) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.0000392 in 1,605,466 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. A412A) has been classified as Benign.

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000037 ( 1 hom. )

Consequence

TRIT1
NM_017646.6 missense, splice_region

Scores

Splicing: ADA: 0.9949

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.93

Variant links:

Genes affected

TRIT1 (HGNC:20286): (tRNA isopentenyltransferase 1) This gene encodes a protein that that is targeted to the mitochondrion and modifies transfer RNAs (tRNAs) by adding a dimethylallyl group onto the adenine at position 37. This modification is important for maintaining the correct reading frame during protein translation. This gene is considered a tumor suppressor and its expression can decrease cell growth. Alternative splicing results in multiple transcripts variants, most of which are likely non-functional. [provided by RefSeq, Aug 2015]

TRIT1 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. No scorers claiming Uncertain. Scorers claiming Benign: max_spliceai.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TRIT1	NM_017646.6 linkuse as main transcript	c.1235C>T	p.Ala412Val	missense_variant, splice_region_variant	11/11	ENST00000316891.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TRIT1	ENST00000316891.10 linkuse as main transcript	c.1235C>T	p.Ala412Val	missense_variant, splice_region_variant	11/11	1	NM_017646.6	P1	Q9H3H1-1

Frequencies

GnomAD3 genomes

AF:

0.0000592

AC:

AN:

152060

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000874

AC:

AN:

240382

Hom.:

AF XY:

0.0000692

AC XY:

AN XY:

129972

show subpopulations

Gnomad AFR exome

AF:

0.000186

Gnomad AMR exome

AF:

0.000185

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000555

Gnomad SAS exome

AF:

0.000177

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000461

Gnomad OTH exome

AF:

0.000169

GnomAD4 exome

AF:

0.0000372

AC:

AN:

1453288

Hom.:

Cov.:

AF XY:

0.0000387

AC XY:

AN XY:

722688

show subpopulations

Gnomad4 AFR exome

AF:

0.0000911

Gnomad4 AMR exome

AF:

0.000141

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000238

Gnomad4 FIN exome

AF:

0.0000188

Gnomad4 NFE exome

AF:

0.0000207

Gnomad4 OTH exome

AF:

0.0000167

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152178

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74408

show subpopulations

Gnomad4 AFR

AF:

0.000169

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000322

Hom.:

Bravo

AF:

0.0000416

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000132

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 19, 2022

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals affected with TRIT1-related conditions. This variant is present in population databases (rs147582410, gnomAD 0.02%), including at least one homozygous and/or hemizygous individual. This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 412 of the TRIT1 protein (p.Ala412Val). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Benign

-0.082

BayesDel_noAF

Uncertain

-0.060

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.033

.;.;T;.;.

Eigen

Uncertain

0.61

Eigen_PC

Uncertain

0.61

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.96

D;D;D;D;D

M_CAP

Benign

0.023

MetaRNN

Benign

0.25

T;T;T;T;T

MetaSVM

Benign

-0.78

MutationAssessor

Uncertain

2.6

.;.;M;.;.

MutationTaster

Benign

1.0

D;D;D;D;D;D;D;D

PrimateAI

Benign

0.46

PROVEAN

Benign

-1.2

N;.;N;N;D

REVEL

Benign

0.22

Sift

Benign

0.28

T;.;T;T;D

Sift4G

Uncertain

0.0050

D;T;T;T;D

Polyphen

0.99, 0.89, 0.98

.;D;P;D;.

Vest4

0.51

MVP

0.74

MPC

0.88

ClinPred

0.087

GERP RS

6.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.13

gMVP

0.29

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

0.99

dbscSNV1_RF

Pathogenic

0.95

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