chr14-73961297-A-C

Position:

• chr14-73961297-A-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_182476.3(COQ6):​c.1016A>C​(p.Asp339Ala) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 13/21 in silico tools predict a benign outcome for this variant. 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. D339V) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: COQ6 NM_182476.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.99

Genes affected

COQ6 (HGNC:20233): (coenzyme Q6, monooxygenase) The protein encoded by this gene belongs to the ubiH/COQ6 family. It is an evolutionarily conserved monooxygenase required for the biosynthesis of coenzyme Q10 (or ubiquinone), which is an essential component of the mitochondrial electron transport chain, and one of the most potent lipophilic antioxidants implicated in the protection of cell damage by reactive oxygen species. Knockdown of this gene in mouse and zebrafish results in decreased growth due to increased apoptosis. Mutations in this gene are associated with autosomal recessive coenzyme Q10 deficiency-6 (COQ10D6), which manifests as nephrotic syndrome with sensorineural deafness. Alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Jun 2012]

COQ6 (HGNC:):

ENTPD5 (HGNC:3367): (ectonucleoside triphosphate diphosphohydrolase 5 (inactive)) The protein encoded by this gene is similar to E-type nucleotidases (NTPases)/ecto-ATPase/apyrases. NTPases, such as CD39, mediate catabolism of extracellular nucleotides. ENTPD5 contains 4 apyrase-conserved regions which is characteristic of NTPases. [provided by RefSeq, Jan 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
COQ6	NM_182476.3	c.1016A>C	p.Asp339Ala	missense_variant	9/12	ENST00000334571.7	NP_872282.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
COQ6	ENST00000334571.7	c.1016A>C	p.Asp339Ala	missense_variant	9/12	1	NM_182476.3	ENSP00000333946.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.053	T
BayesDel_noAF	Benign	-0.31
CADD	Benign	22
DANN	Benign	0.92
DEOGEN2	Benign	0.11	.;T;T
Eigen	Benign	-0.16
Eigen_PC	Benign	0.047
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.88	D;D;D
M_CAP	Benign	0.013	T
MetaRNN	Uncertain	0.43	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.1	.;.;L
PrimateAI	Benign	0.38	T
PROVEAN	Benign	-2.1	N;.;N
REVEL	Benign	0.10
Sift	Benign	0.70	T;.;T
Sift4G	Benign	0.78	T;T;T
Polyphen		0.017	.;.;B
Vest4		0.41
MutPred		0.32		.;.;Gain of MoRF binding (P = 0.0289);
MVP		0.56
MPC		0.85
ClinPred		0.90	D
GERP RS		5.3
Varity_R		0.13
gMVP		0.68

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs2074930; hg19: chr14-74428000;