chr12-4654300-A-G

Position:

• chr12-4654300-A-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_005002.5(NDUFA9):​c.58A>G​(p.Ile20Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000273 in 1,613,128 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: 𝑓 0.00012 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000018 (0 hom.)
• Consequence: NDUFA9 NM_005002.5 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: -0.463

Genes affected

NDUFA9 (HGNC:7693): (NADH:ubiquinone oxidoreductase subunit A9) The encoded protein is a subunit of the hydrophobic protein fraction of the NADH:ubiquinone oxidoreductase (complex I), the first enzyme complex in the electron transport chain located in the inner mitochondrial membrane. A pseudogene has been identified on chromosome 12. [provided by RefSeq, May 2010]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.02104956).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NDUFA9	NM_005002.5	c.58A>G	p.Ile20Val	missense_variant	2/11	ENST00000266544.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NDUFA9	ENST00000266544.10	c.58A>G	p.Ile20Val	missense_variant	2/11	1	NM_005002.5	P1

Frequencies

GnomAD3 genomes AF: 0.000118 AC: 18 AN: 152208 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.000410

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000399 AC: 10 AN: 250470 Hom.: 0 AF XY: 0.0000443 AC XY: 6 AN XY: 135334

Gnomad AFR exome AF: 0.000308

Gnomad AMR exome AF: 0.000116

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000884

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000178 AC: 26 AN: 1460802 Hom.: 0 Cov.: 31 AF XY: 0.0000206 AC XY: 15 AN XY: 726524

Gnomad4 AFR exome AF: 0.000239

Gnomad4 AMR exome AF: 0.0000896

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: 0.00000990

Gnomad4 OTH exome AF: 0.0000497

GnomAD4 genome AF: 0.000118 AC: 18 AN: 152326 Hom.: 0 Cov.: 33 AF XY: 0.000107 AC XY: 8 AN XY: 74490

Gnomad4 AFR AF: 0.000409

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: 0.0000147

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000541 Hom.: 0

Bravo AF: 0.000200

ESP6500AA AF: 0.00159 AC: 7

ESP6500EA AF: 0.00 AC: 0

ExAC AF: 0.0000412 AC: 5

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Nov 29, 2022	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 output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The valine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. ClinVar contains an entry for this variant (Variation ID: 214717). This variant has not been reported in the literature in individuals affected with NDUFA9-related conditions. This variant is present in population databases (rs148447690, gnomAD 0.02%). This sequence change replaces isoleucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 20 of the NDUFA9 protein (p.Ile20Val). -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Apr 16, 2024	In silico analysis indicates that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.058
BayesDel_addAF	Benign	-0.34	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	0.12
DANN	Benign	0.81
DEOGEN2	Benign	0.029	T;T;.
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.030	N
LIST_S2	Benign	0.46	T;T;T
M_CAP	Benign	0.0093	T
MetaRNN	Benign	0.021	T;T;T
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	0.86	L;.;.
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.39	T
PROVEAN	Benign	0.0	N;N;.
REVEL	Benign	0.086
Sift	Benign	0.43	T;T;.
Sift4G	Benign	0.78	T;T;.
Polyphen		0.0010	B;.;.
Vest4		0.088
MVP		0.44
MPC		0.10
ClinPred		0.0037	T
GERP RS		-5.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.018
gMVP		0.26

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

Other links and lift over

dbSNP: rs148447690; hg19: chr12-4763466;