6-73497873-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BS1BS2

The NM_012123.4(MTO1):c.1894C>T(p.Leu632Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00818 in 1,612,248 control chromosomes in the GnomAD database, including 92 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0049 ( 3 hom., cov: 30)

Exomes 𝑓: 0.0085 ( 89 hom. )

Consequence

MTO1
NM_012123.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: 0.549

Variant links:

Genes affected

MTO1 (HGNC:19261): (mitochondrial tRNA translation optimization 1) This gene encodes a mitochondrial protein thought to be involved in mitochondrial tRNA modification. The encoded protein may also play a role in the expression of the non-syndromic and aminoglycoside-induced deafness phenotypes associated with a specific mutation in the mitochondrial 12S rRNA gene. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

MTO1 links:

EEF1A1 (HGNC:3189): (eukaryotic translation elongation factor 1 alpha 1) This gene encodes an isoform of the alpha subunit of the elongation factor-1 complex, which is responsible for the enzymatic delivery of aminoacyl tRNAs to the ribosome. This isoform (alpha 1) is expressed in brain, placenta, lung, liver, kidney, and pancreas, and the other isoform (alpha 2) is expressed in brain, heart and skeletal muscle. This isoform is identified as an autoantigen in 66% of patients with Felty syndrome. This gene has been found to have multiple copies on many chromosomes, some of which, if not all, represent different pseudogenes. [provided by RefSeq, Jul 2008]

EEF1A1 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -19 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.44).

BP6

Variant 6-73497873-C-T is Benign according to our data. Variant chr6-73497873-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 138277.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=0.549 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00495 (753/152222) while in subpopulation NFE AF= 0.0092 (626/68024). AF 95% confidence interval is 0.00861. There are 3 homozygotes in gnomad4. There are 321 alleles in male gnomad4 subpopulation. Median coverage is 30. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MTO1	NM_012123.4 link	c.1894C>T	p.Leu632Leu	synonymous_variant	Exon 11 of 12	ENST00000498286.6	NP_036255.2	Q9Y2Z2-4
MTO1	NM_001123226.2 link	c.2014C>T	p.Leu672Leu	synonymous_variant	Exon 12 of 13		NP_001116698.1	Q9Y2Z2-6
MTO1	NM_133645.3 link	c.1969C>T	p.Leu657Leu	synonymous_variant	Exon 12 of 13		NP_598400.1	Q9Y2Z2-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MTO1	ENST00000498286.6 link	c.1894C>T	p.Leu632Leu	synonymous_variant	Exon 11 of 12	1	NM_012123.4	ENSP00000419561.2		Q9Y2Z2-4

Frequencies

GnomAD3 genomes

AF:

0.00495

AC:

753

AN:

152104

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00159

Gnomad AMI

AF:

0.00110

Gnomad AMR

AF:

0.00216

Gnomad ASJ

AF:

0.000577

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.000829

Gnomad FIN

AF:

0.00113

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00920

Gnomad OTH

AF:

0.00383

GnomAD3 exomes

AF:

0.00497

AC:

1248

AN:

251042

Hom.:

AF XY:

0.00467

AC XY:

634

AN XY:

135702

show subpopulations

Gnomad AFR exome

AF:

0.00117

Gnomad AMR exome

AF:

0.00255

Gnomad ASJ exome

AF:

0.000596

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00203

Gnomad FIN exome

AF:

0.00144

Gnomad NFE exome

AF:

0.00894

Gnomad OTH exome

AF:

0.00425

GnomAD4 exome

AF:

0.00852

AC:

12433

AN:

1460026

Hom.:

Cov.:

AF XY:

0.00811

AC XY:

5886

AN XY:

726150

show subpopulations

Gnomad4 AFR exome

AF:

0.00146

Gnomad4 AMR exome

AF:

0.00284

Gnomad4 ASJ exome

AF:

0.000460

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00193

Gnomad4 FIN exome

AF:

0.00173

Gnomad4 NFE exome

AF:

0.0104

Gnomad4 OTH exome

AF:

0.00723

GnomAD4 genome

AF:

0.00495

AC:

753

AN:

152222

Hom.:

Cov.:

AF XY:

0.00431

AC XY:

321

AN XY:

74410

show subpopulations

Gnomad4 AFR

AF:

0.00159

Gnomad4 AMR

AF:

0.00216

Gnomad4 ASJ

AF:

0.000577

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.000829

Gnomad4 FIN

AF:

0.00113

Gnomad4 NFE

AF:

0.00920

Gnomad4 OTH

AF:

0.00379

Alfa

AF:

0.00627

Hom.:

Bravo

AF:

0.00503

Asia WGS

AF:

0.000577

AC:

AN:

3478

EpiCase

AF:

0.00855

EpiControl

AF:

0.00771

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Mitochondrial hypertrophic cardiomyopathy with lactic acidosis due to MTO1 deficiency

Benign:2

Oct 21, 2021

Fulgent Genetics, Fulgent Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Benign:2

Feb 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

MTO1: BP4, BP7, BS1, BS2 -

Mar 02, 2016

Mayo Clinic Laboratories, Mayo Clinic

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

not specified

Benign:1

Jan 25, 2014

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.44

CADD

Benign

5.3

DANN

Benign

0.63

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.060

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