Genetic Variant MIEF2:p.Val93Ala (chr17-18263216-T-C) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_139162.4(MIEF2):c.278T>C(p.Val93Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000535 in 1,613,866 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00024 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00057 ( 0 hom. )

Consequence

MIEF2
NM_139162.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.620

Variant links:

Genes affected

MIEF2 (HGNC:17920): (mitochondrial elongation factor 2) This gene encodes an outer mitochondrial membrane protein that functions in the regulation of mitochondrial morphology. It can directly recruit the fission mediator dynamin-related protein 1 (Drp1) to the mitochondrial surface. The gene is located within the Smith-Magenis syndrome region on chromosome 17. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jun 2011]

MIEF2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.027338982).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MIEF2	NM_139162.4 link	c.278T>C	p.Val93Ala	missense_variant	Exon 3 of 4	ENST00000323019.9	NP_631901.2	Q96C03-1
MIEF2	NM_148886.2 link	c.311T>C	p.Val104Ala	missense_variant	Exon 3 of 4		NP_683684.2	Q96C03-3
MIEF2	NM_001144900.3 link	c.278T>C	p.Val93Ala	missense_variant	Exon 3 of 4		NP_001138372.1	Q96C03-2
MIEF2	XM_017024190.2 link	c.299T>C	p.Val100Ala	missense_variant	Exon 3 of 4		XP_016879679.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MIEF2	ENST00000323019.9 link	c.278T>C	p.Val93Ala	missense_variant	Exon 3 of 4	2	NM_139162.4	ENSP00000323591.4		Q96C03-1

Frequencies

GnomAD3 genomes

AF:

0.000243

AC:

AN:

152244

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.000544

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000159

AC:

AN:

251066

AF XY:

0.000155

show subpopulations

Gnomad AFR exome

AF:

0.0000617

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:

0.000317

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000565

AC:

826

AN:

1461504

Hom.:

Cov.:

AF XY:

0.000523

AC XY:

380

AN XY:

727042

show subpopulations

African (AFR)

AF:

0.000119

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53040

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000700

AC:

778

AN:

1112008

Other (OTH)

AF:

0.000712

AC:

AN:

60390

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

122

183

244

305

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000243

AC:

AN:

152362

Hom.:

Cov.:

AF XY:

0.000215

AC XY:

AN XY:

74500

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41584

American (AMR)

AF:

0.00

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000544

AC:

AN:

68036

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.505

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000459

Hom.:

Bravo

AF:

0.000212

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.00156

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000814

AC:

ExAC

AF:

0.000140

AC:

EpiCase

AF:

0.000600

EpiControl

AF:

0.000237

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 08, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.311T>C (p.V104A) alteration is located in exon 3 (coding exon 3) of the MIEF2 gene. This alteration results from a T to C substitution at nucleotide position 311, causing the valine (V) at amino acid position 104 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.087

BayesDel_addAF

Benign

-0.64

BayesDel_noAF

Benign

-0.72

CADD

Benign

2.5

(source)

DANN

Benign

0.89

DEOGEN2

Benign

0.013

T;.;.;T;T;T;.

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.2

FATHMM_MKL

Benign

0.21

M_CAP

Benign

0.0025

MetaRNN

Benign

0.027

T;T;T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.9

L;.;L;.;.;.;.

PhyloP100

-0.62

PrimateAI

Benign

0.35

PROVEAN

Benign

-1.1

N;.;N;N;.;.;N

REVEL

Benign

0.029

Sift

Benign

0.099

T;.;D;T;.;.;T

Sift4G

Benign

0.32

T;T;T;T;T;T;T

Polyphen

0.0

B;.;B;B;.;.;.

Vest4

0.065

MVP

0.061

MPC

0.37

ClinPred

0.028

GERP RS

-4.8

Varity_R

0.031

gMVP

0.26

Mutation Taster

=92/8

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

Loading publications...

chr17-18263216-T-C

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over