Genetic Variant NDUFAF4:p.Ala3Thr (chr6-96897795-C-T) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PM5

The NM_014165.4(NDUFAF4):c.7G>A(p.Ala3Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,818 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A3P) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

NDUFAF4
NM_014165.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.97

Publications

0 publications found

Variant links:

Genes affected

NDUFAF4 (HGNC:21034): (NADH:ubiquinone oxidoreductase complex assembly factor 4) NADH:ubiquinone oxidoreductase (complex I) catalyzes the transfer of electrons from NADH to ubiquinone (coenzyme Q) in the first step of the mitochondrial respiratory chain, resulting in the translocation of protons across the inner mitochondrial membrane. This gene encodes a complex I assembly factor. Mutations in this gene are a cause of mitochondrial complex I deficiency. [provided by RefSeq, Oct 2009]

NDUFAF4 Gene-Disease associations (from GenCC):

mitochondrial complex I deficiency, nuclear type 15
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
mitochondrial complex I deficiency
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
Leigh syndrome
Inheritance: AR Classification: LIMITED Submitted by: ClinGen

NDUFAF4 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr6-96897795-C-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 499267.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
NDUFAF4	NM_014165.4 link	c.7G>A	p.Ala3Thr	missense_variant	Exon 1 of 3	ENST00000316149.8	NP_054884.1	Q9P032

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NDUFAF4	ENST00000316149.8 link	c.7G>A	p.Ala3Thr	missense_variant	Exon 1 of 3	1	NM_014165.4	ENSP00000358272.4		Q9P032
NDUFAF4	ENST00000489477.1 link	n.80G>A		non_coding_transcript_exon_variant	Exon 1 of 4	3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461818

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727216

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33476

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111958

Other (OTH)

AF:

0.00

AC:

AN:

60388

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.24

BayesDel_addAF

Uncertain

0.072

BayesDel_noAF

Benign

-0.13

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.38

Eigen

Uncertain

0.21

Eigen_PC

Benign

0.063

FATHMM_MKL

Benign

0.34

LIST_S2

Benign

0.49

M_CAP

Uncertain

0.11

MetaRNN

Uncertain

0.70

MetaSVM

Uncertain

-0.17

MutationAssessor

Pathogenic

3.0

PhyloP100

2.0

PrimateAI

Benign

0.47

PROVEAN

Benign

-1.4

REVEL

Uncertain

0.46

Sift

Uncertain

0.011

Sift4G

Uncertain

0.024

Polyphen

0.97

Vest4

0.43

MutPred

0.69

Gain of relative solvent accessibility (P = 0.0479);

MVP

0.86

MPC

0.40

ClinPred

0.97

GERP RS

4.7

PromoterAI

-0.057

Neutral

(source)

Varity_R

0.23

gMVP

0.33

Mutation Taster

=64/36

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over