1-39883469-C-A

Variant names:

Variant summary

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

The NM_017646.6(TRIT1):c.23G>T(p.Arg8Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000097 in 1,443,660 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R8G) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000097 ( 0 hom. )

Consequence

TRIT1
NM_017646.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.983

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:

MYCL-AS1 (HGNC:40386): (MYCL antisense RNA 1)

MYCL-AS1 links:

Genome browser will be placed here

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=0.4051504).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TRIT1	NM_017646.6 link	c.23G>T	p.Arg8Leu	missense_variant	Exon 1 of 11	ENST00000316891.10	NP_060116.2	Q9H3H1-1Q53F11Q3T7C7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TRIT1	ENST00000316891.10 link	c.23G>T	p.Arg8Leu	missense_variant	Exon 1 of 11	1	NM_017646.6	ENSP00000321810.5	Q9H3H1-1
TRIT1	ENST00000372818.5 link	c.23G>T	p.Arg8Leu	missense_variant	Exon 1 of 10	1		ENSP00000361905.1	Q9H3H1-4
TRIT1	ENST00000462797.5 link	n.23G>T		non_coding_transcript_exon_variant	Exon 1 of 10	5		ENSP00000473773.1	S4R2Z0
TRIT1	ENST00000486825.6 link	n.5G>T		non_coding_transcript_exon_variant	Exon 1 of 8	5		ENSP00000474151.1	S4R3C5
TRIT1	ENST00000489945.5 link	n.23G>T		non_coding_transcript_exon_variant	Exon 1 of 7	5		ENSP00000473745.1	B4DK89
TRIT1	ENST00000492612.6 link	n.11G>T		non_coding_transcript_exon_variant	Exon 1 of 9	5		ENSP00000473708.1	S4R2X1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000825

AC:

AN:

242292

Hom.:

AF XY:

0.0000151

AC XY:

AN XY:

132562

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000112

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000970

AC:

AN:

1443660

Hom.:

Cov.:

AF XY:

0.0000112

AC XY:

AN XY:

714262

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000256

Gnomad4 SAS exome

AF:

0.0000350

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.11e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.0000151

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

May 29, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.23G>T (p.R8L) alteration is located in exon 1 (coding exon 1) of the TRIT1 gene. This alteration results from a G to T substitution at nucleotide position 23, causing the arginine (R) at amino acid position 8 to be replaced by a leucine (L). 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

0.20

BayesDel_addAF

Benign

-0.094

BayesDel_noAF

Benign

-0.37

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.032

.;T;.

Eigen

Benign

0.062

Eigen_PC

Benign

0.10

FATHMM_MKL

Benign

0.69

LIST_S2

Uncertain

0.89

D;D;D

M_CAP

Benign

0.052

MetaRNN

Benign

0.41

T;T;T

MetaSVM

Benign

-0.92

MutationAssessor

Benign

1.8

L;L;L

PrimateAI

Uncertain

0.59

PROVEAN

Benign

-0.34

.;N;N

REVEL

Benign

0.15

Sift

Uncertain

0.0060

.;D;D

Sift4G

Benign

0.10

T;D;D

Polyphen

0.95

P;P;.

Vest4

0.59

MutPred

0.48

Loss of MoRF binding (P = 0.0087);Loss of MoRF binding (P = 0.0087);Loss of MoRF binding (P = 0.0087);

MVP

0.68

MPC

0.92

ClinPred

0.75

GERP RS

4.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.22

gMVP

0.65

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