14-73950337-C-G

Variant names:

• chr14-73950337-C-G
• rs1306863995
• NM_182476.3:c.5C>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_182476.3(COQ6):​c.5C>G​(p.Ala2Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000143 in 1,398,524 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. A2E) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: COQ6 NM_182476.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.254
• Publications: 0 publications found

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]

FAM161B (HGNC:19854): (FAM161 centrosomal protein B) Predicted to be involved in cilium organization. Located in cytoplasmic microtubule. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_182476.3. 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
	COQ6	NM_182476.3	MANE Select	c.5C>G	p.Ala2Gly	missense	Exon 1 of 12	NP_872282.1	Q9Y2Z9-1
	COQ6	NM_001425255.1		c.5C>G	p.Ala2Gly	missense	Exon 1 of 11	NP_001412184.1
	COQ6	NM_001425256.1		c.5C>G	p.Ala2Gly	missense	Exon 1 of 11	NP_001412185.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COQ6	ENST00000334571.7	TSL:1 MANE Select	c.5C>G	p.Ala2Gly	missense	Exon 1 of 12	ENSP00000333946.2	Q9Y2Z9-1
	COQ6	ENST00000554193.5	TSL:1	n.28C>G		non_coding_transcript_exon	Exon 1 of 4
	COQ6	ENST00000556300.6	TSL:1	n.39C>G		non_coding_transcript_exon	Exon 1 of 5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000143 AC: 2 AN: 1398524 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 691078

African (AFR) AF: 0.00 AC: 0 AN: 31976

American (AMR) AF: 0.00 AC: 0 AN: 36432

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25260

East Asian (EAS) AF: 0.00 AC: 0 AN: 36236

South Asian (SAS) AF: 0.00 AC: 0 AN: 80122

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 41588

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5706

European-Non Finnish (NFE) AF: 0.00000185 AC: 2 AN: 1082982

Other (OTH) AF: 0.00 AC: 0 AN: 58222

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.097
BayesDel_addAF	Uncertain	0.013	T
BayesDel_noAF	Benign	-0.22
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.099	T
Eigen	Benign	-0.10
Eigen_PC	Benign	0.0075
FATHMM_MKL	Uncertain	0.81	D
LIST_S2	Benign	0.54	T
M_CAP	Benign	0.031	D
MetaRNN	Uncertain	0.44	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.5	L
PhyloP100		0.25
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-0.47	N
REVEL	Benign	0.11
Sift	Pathogenic	0.0	D
Sift4G	Benign	0.063	T
Polyphen		0.031	B
Vest4		0.47
MutPred		0.26		Loss of sheet (P = 0.0228)
MVP		0.52
MPC		0.62
ClinPred		0.96	D
GERP RS		5.2
PromoterAI		-0.44	Neutral
Varity_R		0.35
gMVP		0.49
Mutation Taster		=88/12	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs1306863995; hg19: chr14-74417040;