chr9-122152334-C-A

Variant names:

• chr9-122152334-C-A
• rs4679
• NM_014222.3:c.126G>T

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM2 PP2 PP3_Moderate

The NM_014222.3(NDUFA8):​c.126G>T​(p.Glu42Asp) variant causes a missense change. The variant allele was found at a frequency of 0.00000124 in 1,613,720 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 31)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: NDUFA8 NM_014222.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.62
• Publications: 41 publications found

Genes affected

NDUFA8 (HGNC:7692): (NADH:ubiquinone oxidoreductase subunit A8) The protein encoded by this gene belongs to the complex I 19 kDa subunit family. Mammalian complex I is composed of 45 different subunits. This protein has NADH dehydrogenase activity and oxidoreductase activity. It plays an important role in transfering electrons from NADH to the respiratory chain. The immediate electron acceptor for the enzyme is believed to be ubiquinone. Alternative splicing of this gene results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Dec 2015]

NDUFA8 Gene-Disease associations (from GenCC):

• mitochondrial complex I deficiency, nuclear type 37

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 2 curated pathogenic missense variants (we use a threshold of 10). The gene has 0 curated benign missense variants. Gene score misZ: 0.48122 (below the threshold of 3.09). Trascript score misZ: 0.71331 (below the threshold of 3.09). GenCC associations: The gene is linked to mitochondrial complex I deficiency, nuclear type 37.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.875

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_014222.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NDUFA8	NM_014222.3	MANE Select	c.126G>T	p.Glu42Asp	missense	Exon 2 of 4	NP_055037.1
	NDUFA8	NM_001318195.2		c.126G>T	p.Glu42Asp	missense	Exon 2 of 4	NP_001305124.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	NDUFA8	ENST00000373768.4	TSL:1 MANE Select	c.126G>T	p.Glu42Asp	missense	Exon 2 of 4	ENSP00000362873.3
	NDUFA8	ENST00000942086.1		c.117G>T	p.Glu39Asp	missense	Exon 2 of 4	ENSP00000612145.1
	NDUFA8	ENST00000886470.1		c.52-4061G>T		intron	N/A	ENSP00000556529.1

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 151876 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.0000242

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461844 Hom.: 0 Cov.: 53 AF XY: 0.00000138 AC XY: 1 AN XY: 727216

African (AFR) AF: 0.0000299 AC: 1 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53412

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111980

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 151876 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 74112

African (AFR) AF: 0.0000242 AC: 1 AN: 41350

American (AMR) AF: 0.00 AC: 0 AN: 15250

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5184

South Asian (SAS) AF: 0.00 AC: 0 AN: 4816

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10524

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 314

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67966

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 27414

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.68
BayesDel_addAF	Pathogenic	0.18	D
BayesDel_noAF	Uncertain	0.020
CADD	Uncertain	23
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.57	D
Eigen	Benign	0.086
Eigen_PC	Uncertain	0.23
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.91	D
M_CAP	Benign	0.024	T
MetaRNN	Pathogenic	0.87	D
MetaSVM	Benign	-0.36	T
MutationAssessor	Benign	0.91	L
PhyloP100		3.6
PrimateAI	Uncertain	0.72	T
PROVEAN	Uncertain	-2.6	D
REVEL	Uncertain	0.50
Sift	Uncertain	0.0060	D
Sift4G	Uncertain	0.025	D
Polyphen		0.50	P
Vest4		0.66
MutPred		0.64		Gain of ubiquitination at K38 (P = 0.0716)
MVP		0.96
MPC		0.29
ClinPred		0.96	D
GERP RS		4.3
Varity_R		0.69
gMVP		0.62
Mutation Taster		=7/93	disease causing

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

Other links and lift over

dbSNP: rs4679; hg19: chr9-124914613;