rs397514614

Positions:

• chr15-65026876-G-A

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM2 PP3_Strong PP5_Very_Strong

The NM_139242.4(MTFMT):​c.374C>T​(p.Ser125Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000267 in 1,461,646 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 Likely pathogenic (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000027 (0 hom.)
• Consequence: MTFMT NM_139242.4 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 8.28

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 (HGNC:):

ACMG classification

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, 0.978
• PP5: Variant 15-65026876-G-A is Pathogenic according to our data. Variant chr15-65026876-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 39829.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MTFMT	NM_139242.4	c.374C>T	p.Ser125Leu	missense_variant	2/9	ENST00000220058.9	NP_640335.2
MTFMT	XM_005254158.6	c.527C>T	p.Ser176Leu	missense_variant	2/9		XP_005254215.2
MTFMT	XR_001751081.2	n.553C>T		non_coding_transcript_exon_variant	2/5
MTFMT	XR_007064421.1	n.553C>T		non_coding_transcript_exon_variant	2/4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MTFMT	ENST00000220058.9	c.374C>T	p.Ser125Leu	missense_variant	2/9	1	NM_139242.4	ENSP00000220058.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000401 AC: 1 AN: 249212 Hom.: 0 AF XY: 0.00000740 AC XY: 1 AN XY: 135186

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: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000885

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000267 AC: 39 AN: 1461646 Hom.: 0 Cov.: 31 AF XY: 0.0000248 AC XY: 18 AN XY: 727094

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: 0.0000187

Gnomad4 NFE exome AF: 0.0000324

Gnomad4 OTH exome AF: 0.0000331

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000827 AC: 1

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Combined oxidative phosphorylation defect type 15 Pathogenic:3

Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Sep 01, 2017	This variant has been previously reported as disease-causing and was found once in our laboratory in trans with another pathogenic variant in a 12-year-old female with mitochondrial disorder, Leigh disease, intellectual disability, short stature, microcephaly, PDA, brachydactyly, pes planus, congenital hypothyroidism -
Pathogenic, no assertion criteria provided	literature only	OMIM	Sep 07, 2011	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	DASA	Feb 05, 2022	The c.374C>T;p.(Ser125Leu) missense variant has been observed in affected individual(s) and ClinVar contains an entry for this variant (ClinVar: 39829; PMID: 21907147) - PS4_supporting. The variant is present at low allele frequencies population databases (rs397514614 – gnomAD 0.00004013%; ABraOM no frequency - http://abraom.ib.usp.br/) - PM2_supporting. The p.(Ser125Leu) was detected in trans with a pathogenic variant (PMID: 21907147) - PM3_strong. Multiple lines of computational evidence support a deleterious effect on the gene or gene product - PP3. In summary, the currently available evidence indicates that the variant is likely pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.84
BayesDel_addAF	Pathogenic	0.42	D
BayesDel_noAF	Pathogenic	0.37
CADD	Pathogenic	33
DANN	Pathogenic	1.0
DEOGEN2	Uncertain	0.78	D
Eigen	Pathogenic	0.91
Eigen_PC	Pathogenic	0.82
FATHMM_MKL	Pathogenic	0.97	D
M_CAP	Uncertain	0.17	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Uncertain	0.69	D
MutationAssessor	Pathogenic	3.4	M
PrimateAI	Uncertain	0.58	T
PROVEAN	Pathogenic	-5.6	D
REVEL	Pathogenic	0.92
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.0020	D
Polyphen		1.0	D
Vest4		0.94
MutPred		0.87		Loss of catalytic residue at S125 (P = 0.0556);
MVP		0.97
MPC		0.52
ClinPred		1.0	D
GERP RS		5.1
Varity_R		0.90
gMVP		0.92

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

Other links and lift over

dbSNP: rs397514614; hg19: chr15-65319214; COSMIC: COSV54980259; COSMIC: COSV54980259;