4-99549254-C-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBS1_Supporting

The NM_001134665.3(TRMT10A):c.854G>A(p.Cys285Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000124 in 1,614,138 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000085 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00013 ( 1 hom. )

Consequence

TRMT10A
NM_001134665.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 0.215

Variant links:

Genes affected

TRMT10A (HGNC:28403): (tRNA methyltransferase 10A) This gene encodes a protein that belongs to the tRNA (Guanine-1)-methyltransferase family. A similar gene in yeast modifies several different tRNA species. Mutations in this gene are associated with microcephaly, short stature, and impaired glucose metabolism. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Oct 2014]

TRMT10A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.0064058304).

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.0000854 (13/152308) while in subpopulation SAS AF= 0.00166 (8/4830). AF 95% confidence interval is 0.000824. There are 0 homozygotes in gnomad4. There are 4 alleles in male gnomad4 subpopulation. Median coverage is 32. 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 rank	MANE	Protein	UniProt
TRMT10A	NM_001134665.3 link	c.854G>A	p.Cys285Tyr	missense_variant	Exon 8 of 8	ENST00000394876.7	NP_001128137.1	Q8TBZ6V9HVY8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TRMT10A	ENST00000394876.7 link	c.854G>A	p.Cys285Tyr	missense_variant	Exon 8 of 8	1	NM_001134665.3	ENSP00000378342.2	Q8TBZ6
TRMT10A	ENST00000273962.7 link	c.854G>A	p.Cys285Tyr	missense_variant	Exon 8 of 8	1		ENSP00000273962.3	Q8TBZ6
TRMT10A	ENST00000394877.7 link	c.854G>A	p.Cys285Tyr	missense_variant	Exon 8 of 8	2		ENSP00000378343.3	Q8TBZ6

Frequencies

GnomAD3 genomes

AF:

0.0000854

AC:

AN:

152190

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:

0.00165

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000131

AC:

AN:

251254

Hom.:

AF XY:

0.000155

AC XY:

AN XY:

135818

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:

0.000980

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000128

AC:

187

AN:

1461830

Hom.:

Cov.:

AF XY:

0.000165

AC XY:

120

AN XY:

727220

show subpopulations

Gnomad4 AFR exome

AF:

0.0000598

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00101

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000782

Gnomad4 OTH exome

AF:

0.000149

GnomAD4 genome

AF:

0.0000854

AC:

AN:

152308

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74498

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:

0.00166

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000491

Hom.:

Bravo

AF:

0.0000378

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.000148

AC:

Asia WGS

AF:

0.00115

AC:

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

May 03, 2022

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Oct 25, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces cysteine, which is neutral and slightly polar, with tyrosine, which is neutral and polar, at codon 285 of the TRMT10A protein (p.Cys285Tyr). This variant is present in population databases (rs74445102, gnomAD 0.1%). This variant has not been reported in the literature in individuals affected with TRMT10A-related conditions. ClinVar contains an entry for this variant (Variation ID: 1337704). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt TRMT10A protein function with a negative predictive value of 80%. 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. -

not specified

Uncertain:1

Aug 07, 2020

Genetic Services Laboratory, University of Chicago

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

DNA sequence analysis of the TRMT10A gene demonstrated a sequence change, c.854G>A, in exon 8 that results in an amino acid change, p.Cys285Tyr. This sequence change does not appear to have been previously described in patients with TRMT10A-related disorders and has been described in the gnomAD database with a frequency of 0.0098% in the South Asian sub-population (dbSNP rs74445102). The p.Cys285Tyr change affects a poorly conserved amino acid residue located in a domain of the TRMT10A protein that is known to be functional. The p.Cys285Tyr substitution appears to be benign using several in-silico pathogenicity prediction tools (SIFT, PolyPhen2, Align GVGD, REVEL). Due to these contrasting evidences and the lack of functional studies, the clinical significance of the p.Cys285Tyr change remains unknown at this time. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.072

BayesDel_addAF

Benign

-0.57

BayesDel_noAF

Benign

-0.65

CADD

Benign

DANN

Benign

0.27

DEOGEN2

Benign

0.025

T;T;T

Eigen

Benign

-0.66

Eigen_PC

Benign

-0.51

FATHMM_MKL

Benign

0.71

LIST_S2

Benign

0.52

.;.;T

M_CAP

Benign

0.0065

MetaRNN

Benign

0.0064

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.4

L;L;L

PrimateAI

Benign

0.35

PROVEAN

Benign

-1.8

N;N;N

REVEL

Benign

0.029

Sift

Benign

0.87

T;T;T

Sift4G

Benign

0.27

T;T;T

Polyphen

0.0

B;B;B

Vest4

0.096

MVP

0.11

MPC

0.24

ClinPred

0.036

GERP RS

3.3

Varity_R

0.054

gMVP

0.21

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