chr22-46337925-T-C

Position:

chr22-46337925-T-C

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM2PP3_StrongPP5_Very_Strong

The NM_018006.5(TRMU):c.229T>C(p.Tyr77His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,878 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. Y77Y) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

TRMU
NM_018006.5 missense

Scores

Clinical Significance

Pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: 7.48

Variant links:

Genes affected

TRMU (HGNC:25481): (tRNA mitochondrial 2-thiouridylase) This nuclear gene encodes a mitochondrial tRNA-modifying enzyme. The encoded protein catalyzes the 2-thiolation of uridine on the wobble positions of tRNA(Lys), tRNA(Glu), and tRNA(Gln), resulting in the formation of 5-taurinomethyl-2-thiouridine moieties. Mutations in this gene may cause transient infantile liver failure. Polymorphisms in this gene may also influence the severity of deafness caused by mitochondrial 12S ribosomal RNA mutations. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2013]

TRMU links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 14 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.981

PP5

Variant 22-46337925-T-C is Pathogenic according to our data. Variant chr22-46337925-T-C is described in ClinVar as [Pathogenic]. Clinvar id is 1291.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TRMU	NM_018006.5 linkuse as main transcript	c.229T>C	p.Tyr77His	missense_variant	2/11	ENST00000645190.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TRMU	ENST00000645190.1 linkuse as main transcript	c.229T>C	p.Tyr77His	missense_variant	2/11		NM_018006.5	P1	O75648-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251496

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135922

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.0000992

Gnomad EAS exome

AF:

0.00

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:

6.84e-7

AC:

AN:

1461878

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727242

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:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

Alfa

AF:

0.000104

Hom.:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Acute infantile liver failure due to synthesis defect of mtDNA-encoded proteins

Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Sep 01, 2009

- -

Aminoglycoside-induced deafness

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Baylor Genetics

Oct 05, 2023

- -

not provided

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jun 04, 2023

This sequence change replaces tyrosine, which is neutral and polar, with histidine, which is basic and polar, at codon 77 of the TRMU protein (p.Tyr77His). For these reasons, this variant has been classified as Pathogenic. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt TRMU protein function. ClinVar contains an entry for this variant (Variation ID: 1291). This missense change has been observed in individuals with acute infantile liver failure (PMID: 19732863). This variant is present in population databases (rs118203990, gnomAD 0.01%). -

TRMU-related disorder

Pathogenic:1

Pathogenic, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Feb 16, 2024

The TRMU c.229T>C variant is predicted to result in the amino acid substitution p.Tyr77His. This variant was reported as homozygous or compound heterozygous state in multiple individuals with infantile liver failure (Zeharia et al 2009. PubMed ID: 19732863; Vogel et al 2023. PubMed ID: 36305855). This variant is one of the most common disease causing variants in TRMU in association with reversible acute liver failure of infancy. This variant is reported in 0.0099% of alleles in individuals of Ashkenazi Jewish descent in gnomAD. This variant is interpreted as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.98

BayesDel_addAF

Pathogenic

0.42

BayesDel_noAF

Pathogenic

0.37

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.34

T;T;.;.;.

Eigen

Pathogenic

0.83

Eigen_PC

Pathogenic

0.69

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Pathogenic

0.98

.;D;D;D;D

M_CAP

Pathogenic

0.35

MetaRNN

Pathogenic

0.98

D;D;D;D;D

MetaSVM

Pathogenic

0.88

MutationAssessor

Pathogenic

4.2

H;H;H;.;.

MutationTaster

Benign

1.0

A;A;A

PrimateAI

Uncertain

0.74

PROVEAN

Pathogenic

-4.6

D;.;D;.;.

REVEL

Pathogenic

0.92

Sift

Pathogenic

0.0

D;.;D;.;.

Sift4G

Pathogenic

0.0

D;.;D;.;.

Polyphen

1.0

D;D;D;.;.

Vest4

0.92

MutPred

0.95

Gain of helix (P = 0.0696);Gain of helix (P = 0.0696);Gain of helix (P = 0.0696);.;.;

MVP

0.86

MPC

0.55

ClinPred

1.0

GERP RS

4.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.94

gMVP

0.88

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