Genetic Variant NM_012123.4:c.1549G>T (chr6-73482532-G-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_012123.4(MTO1):c.1549G>T(p.Val517Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,422 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V517M) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

MTO1
NM_012123.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.51

Publications

6 publications found

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 Gene-Disease associations (from GenCC):

mitochondrial disease
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
mitochondrial hypertrophic cardiomyopathy with lactic acidosis due to MTO1 deficiency
Inheritance: AR, Unknown Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics, G2P

MTO1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.06711921).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MTO1	NM_012123.4 link	c.1549G>T	p.Val517Leu	missense_variant	Exon 9 of 12	ENST00000498286.6	NP_036255.2	Q9Y2Z2-4
MTO1	NM_001123226.2 link	c.1669G>T	p.Val557Leu	missense_variant	Exon 10 of 13		NP_001116698.1	Q9Y2Z2-6
MTO1	NM_133645.3 link	c.1624G>T	p.Val542Leu	missense_variant	Exon 10 of 13		NP_598400.1	Q9Y2Z2-1
MTO1	XM_047418605.1 link	c.*27G>T		3_prime_UTR_variant	Exon 8 of 8		XP_047274561.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MTO1	ENST00000498286.6 link	c.1549G>T	p.Val517Leu	missense_variant	Exon 9 of 12	1	NM_012123.4	ENSP00000419561.2		Q9Y2Z2-4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1460422

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726588

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33438

American (AMR)

AF:

0.00

AC:

AN:

44704

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86200

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4896

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111676

Other (OTH)

AF:

0.00

AC:

AN:

60262

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Benign

-0.46

CADD

Benign

(source)

DANN

Benign

0.37

DEOGEN2

Benign

0.078

.;.;.;T;T

Eigen

Benign

-0.37

Eigen_PC

Benign

-0.13

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.88

D;D;D;D;D

M_CAP

Benign

0.0021

MetaRNN

Benign

0.067

T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.34

.;.;.;N;.

PhyloP100

2.5

PrimateAI

Benign

0.39

PROVEAN

Benign

0.26

N;N;N;N;N

REVEL

Benign

0.087

Sift

Benign

1.0

T;T;T;T;T

Sift4G

Benign

1.0

T;T;T;T;T

Polyphen

0.0

B;B;.;B;.

Vest4

0.40

MutPred

0.45

.;.;.;Loss of MoRF binding (P = 0.1029);.;

MVP

0.32

MPC

0.27

ClinPred

0.29

GERP RS

4.5

Varity_R

0.041

gMVP

0.46

Mutation Taster

=98/2

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over