Genetic Variant MTFMT:p.Arg49LeufsTer58 (chr15-65029460-AGAGCACCC-A) – ACMG Classification: Pathogenic (18 pts)

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_139242.4(MTFMT):c.146_153delGGGTGCTC(p.Arg49LeufsTer58) variant causes a frameshift change. The variant allele was found at a frequency of 0.00000507 in 1,379,580 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000051 ( 0 hom. )

Consequence

MTFMT
NM_139242.4 frameshift

Scores

Not classified

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3

Conservation

PhyloP100: 5.08

Publications

0 publications found

Variant links:

Genes affected

MTFMT (HGNC:29666): (mitochondrial methionyl-tRNA formyltransferase) The protein encoded by this nuclear gene localizes to the mitochondrion, where it catalyzes the formylation of methionyl-tRNA. [provided by RefSeq, Jun 2011]

MTFMT Gene-Disease associations (from GenCC):

combined oxidative phosphorylation defect type 15
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
Leigh syndrome
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
Leigh syndrome with leukodystrophy
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

MTFMT links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 18 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 15-65029460-AGAGCACCC-A is Pathogenic according to our data. Variant chr15-65029460-AGAGCACCC-A is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 133323.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_139242.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MTFMT	NM_139242.4	MANE Select	c.146_153delGGGTGCTC	p.Arg49LeufsTer58	frameshift	Exon 1 of 9	NP_640335.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
MTFMT	ENST00000220058.9	TSL:1 MANE Select	c.146_153delGGGTGCTC	p.Arg49LeufsTer58	frameshift	Exon 1 of 9	ENSP00000220058.4
MTFMT	ENST00000543678.1	TSL:2	n.146_153delGGGTGCTC		non_coding_transcript_exon	Exon 1 of 4	ENSP00000443754.1
MTFMT	ENST00000558460.5	TSL:5	n.146_153delGGGTGCTC		non_coding_transcript_exon	Exon 1 of 10	ENSP00000452646.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000825

AC:

AN:

121226

AF XY:

0.00

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000228

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000507

AC:

AN:

1379580

Hom.:

AF XY:

0.00000588

AC XY:

AN XY:

680530

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

28804

American (AMR)

AF:

0.00

AC:

AN:

34390

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24688

East Asian (EAS)

AF:

0.00

AC:

AN:

33730

South Asian (SAS)

AF:

0.00

AC:

AN:

77198

European-Finnish (FIN)

AF:

0.00

AC:

AN:

44532

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5280

European-Non Finnish (NFE)

AF:

0.00000652

AC:

AN:

1073594

Other (OTH)

AF:

0.00

AC:

AN:

57364

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.418

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.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:2

Mar 19, 2024

Mayo Clinic Laboratories, Mayo Clinic

Significance:Pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

PP1, PM2, PM3_supporting, PVS1

May 01, 2017

CeGaT Center for Human Genetics Tuebingen

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Combined oxidative phosphorylation defect type 15

Pathogenic:1

Mar 01, 2014

OMIM

Significance:Pathogenic

Review Status:no assertion criteria provided

Collection Method:literature only

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

PhyloP100

5.1

Mutation Taster

=17/183

disease causing (ClinVar)

(source)

Splicing

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over