16-28842995-T-C

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_003321.5(TUFM):c.1348A>G(p.Lys450Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000805 in 1,614,074 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000085 ( 0 hom. )

Consequence

TUFM
NM_003321.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 3.15

Variant links:

Genes affected

TUFM (HGNC:12420): (Tu translation elongation factor, mitochondrial) This gene encodes a protein which participates in protein translation in mitochondria. Mutations in this gene have been associated with combined oxidative phosphorylation deficiency resulting in lactic acidosis and fatal encephalopathy. A pseudogene has been identified on chromosome 17. [provided by RefSeq, Jul 2008]

TUFM links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.12547982).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TUFM	NM_003321.5 link	c.1348A>G	p.Lys450Glu	missense_variant	Exon 10 of 10	ENST00000313511.8	NP_003312.3	P49411A0A384ME17
TUFM	NM_001365360.2 link	c.1264A>G	p.Lys422Glu	missense_variant	Exon 10 of 10		NP_001352289.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TUFM	ENST00000313511.8 link	c.1348A>G	p.Lys450Glu	missense_variant	Exon 10 of 10	1	NM_003321.5	ENSP00000322439.3		P49411
TUFM	ENST00000569217.1 link	n.657A>G		non_coding_transcript_exon_variant	Exon 3 of 3	2

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152188

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000517

AC:

AN:

251474

Hom.:

AF XY:

0.0000294

AC XY:

AN XY:

135914

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000217

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000791

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000848

AC:

124

AN:

1461886

Hom.:

Cov.:

AF XY:

0.0000811

AC XY:

AN XY:

727244

show subpopulations

Gnomad4 AFR exome

AF:

0.0000896

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000103

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152188

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74338

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000859

Hom.:

Bravo

AF:

0.0000680

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Feb 10, 2015

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

p.Lys450Glu (AAG>GAG): c.1348 A>G in exon 10 of the TUFM gene (NM_003321.4) A variant of unknown significance has been identified in the TUFM gene. The K450E missense substitution has not been published as a mutation, nor has it been reported as a benign polymorphism to our knowledge. Mutations in the TUFM gene are associated with the autosomal recessive disorder combined oxidative phosphorylation deficiency 4. The amino acid substitution is non-conservative in that a positively charged Lysine residue is replaced by a negatively charged Glutamic Acid residue. This change occurs at a position in the TUFM gene that is highly conserved in mammals. Multiple in-silico analysis models predict that K450E is a benign sequence change. Therefore, based on the currently available information, it is unclear whether K450E is a disease-causing mutation or a rare benign variant. The variant is found in MITONUC-MITOP panel(s). -

Oct 24, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. ClinVar contains an entry for this variant (Variation ID: 215314). This variant has not been reported in the literature in individuals affected with TUFM-related conditions. This variant is present in population databases (rs199674838, gnomAD 0.02%). This sequence change replaces lysine, which is basic and polar, with glutamic acid, which is acidic and polar, at codon 450 of the TUFM protein (p.Lys450Glu). -

Inborn genetic diseases

Uncertain:1

Jun 27, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1348A>G (p.K450E) alteration is located in exon 10 (coding exon 10) of the TUFM gene. This alteration results from a A to G substitution at nucleotide position 1348, causing the lysine (K) at amino acid position 450 to be replaced by a glutamic acid (E). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Combined oxidative phosphorylation defect type 4

Uncertain:1

Apr 11, 2018

Baylor Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.22

BayesDel_noAF

Benign

-0.26

CADD

Benign

DANN

Uncertain

0.99

Eigen

Benign

-0.18

Eigen_PC

Benign

-0.019

FATHMM_MKL

Uncertain

0.77

LIST_S2

Benign

0.62

M_CAP

Benign

0.040

MetaRNN

Benign

0.13

MetaSVM

Benign

-0.78

PrimateAI

Benign

0.42

PROVEAN

Benign

0.13

REVEL

Benign

0.18

Sift

Benign

0.25

Sift4G

Benign

0.49

Vest4

0.30

MVP

0.72

MPC

0.86

ClinPred

0.10

GERP RS

4.9

gMVP

0.60

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

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