15-65003124-G-A

Variant names:

• chr15-65003124-G-A
• NM_139242.4:c.1108C>T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_139242.4(MTFMT):​c.1108C>T​(p.Leu370Phe) variant causes a missense change. The variant allele was found at a frequency of 0.000000685 in 1,460,692 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: MTFMT NM_139242.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.75

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3782385).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MTFMT	NM_139242.4	c.1108C>T	p.Leu370Phe	missense_variant	Exon 9 of 9	ENST00000220058.9	NP_640335.2
MTFMT	XM_005254158.6	c.1261C>T	p.Leu421Phe	missense_variant	Exon 9 of 9		XP_005254215.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MTFMT	ENST00000220058.9	c.1108C>T	p.Leu370Phe	missense_variant	Exon 9 of 9	1	NM_139242.4	ENSP00000220058.4
MTFMT	ENST00000558460.5	n.1108C>T		non_coding_transcript_exon_variant	Exon 9 of 10	5		ENSP00000452646.1
MTFMT	ENST00000560717.5	n.*578C>T		non_coding_transcript_exon_variant	Exon 8 of 8	5		ENSP00000457257.1
MTFMT	ENST00000560717.5	n.*578C>T		3_prime_UTR_variant	Exon 8 of 8	5		ENSP00000457257.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460692 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 726508

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: 9.00e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Oct 13, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces leucine, which is neutral and non-polar, with phenylalanine, which is neutral and non-polar, at codon 370 of the MTFMT protein (p.Leu370Phe). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with MTFMT-related conditions. Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) has been performed for this missense variant. However, the output from this modeling did not meet the statistical confidence thresholds required to predict the impact of this variant on MTFMT protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.033	T
BayesDel_noAF	Benign	-0.29
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.19	T
Eigen	Uncertain	0.43
Eigen_PC	Uncertain	0.45
FATHMM_MKL	Uncertain	0.89	D
M_CAP	Benign	0.032	D
MetaRNN	Benign	0.38	T
MetaSVM	Benign	-0.35	T
MutationAssessor	Uncertain	2.3	M
PrimateAI	Benign	0.39	T
PROVEAN	Benign	-0.93	N
REVEL	Benign	0.15
Sift	Benign	0.039	D
Sift4G	Uncertain	0.060	T
Polyphen		0.99	D
Vest4		0.29
MutPred		0.32		Loss of sheet (P = 0.0037);
MVP		0.80
MPC		0.48
ClinPred		0.85	D
GERP RS		4.4
Varity_R		0.086
gMVP		0.27

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr15-65295462;