1-226965223-C-G

Variant names:

• chr1-226965223-C-G
• NM_020247.5:c.401C>G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_020247.5(COQ8A):​c.401C>G​(p.Ala134Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A134V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: COQ8A NM_020247.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.01

Genes affected

COQ8A (HGNC:16812): (coenzyme Q8A) This gene encodes a mitochondrial protein similar to yeast ABC1, which functions in an electron-transferring membrane protein complex in the respiratory chain. It is not related to the family of ABC transporter proteins. Expression of this gene is induced by the tumor suppressor p53 and in response to DNA damage, and inhibiting its expression partially suppresses p53-induced apoptosis. Alternatively spliced transcript variants have been found; however, their full-length nature has not been determined. [provided by RefSeq, Jul 2008]

ENSG00000288674 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.100173).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COQ8A	NM_020247.5	c.401C>G	p.Ala134Gly	missense_variant	Exon 3 of 15	ENST00000366777.4	NP_064632.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COQ8A	ENST00000366777.4	c.401C>G	p.Ala134Gly	missense_variant	Exon 3 of 15	1	NM_020247.5	ENSP00000355739.3
ENSG00000288674	ENST00000366779.6	n.*5128C>G		non_coding_transcript_exon_variant	Exon 20 of 32	2		ENSP00000355741.2
ENSG00000288674	ENST00000366779.6	n.*5128C>G		3_prime_UTR_variant	Exon 20 of 32	2		ENSP00000355741.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

May 20, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt COQ8A protein function. This variant has not been reported in the literature in individuals with COQ8A-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change replaces alanine with glycine at codon 134 of the COQ8A protein (p.Ala134Gly). The alanine residue is moderately conserved and there is a small physicochemical difference between alanine and glycine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.069
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	15
DANN	Benign	0.77
DEOGEN2	Benign	0.071	T;.;T
Eigen	Benign	-0.55
Eigen_PC	Benign	-0.51
FATHMM_MKL	Benign	0.55	D
LIST_S2	Benign	0.46	.;T;T
M_CAP	Benign	0.024	T
MetaRNN	Benign	0.10	T;T;T
MetaSVM	Benign	-0.80	T
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-0.24	N;N;N
REVEL	Benign	0.12
Sift	Benign	0.33	T;T;T
Sift4G	Benign	0.30	T;T;T
Polyphen		0.0	B;.;B
Vest4		0.13
MutPred		0.16		Gain of catalytic residue at A134 (P = 0.0584);.;Gain of catalytic residue at A134 (P = 0.0584);
MVP		0.67
MPC		0.044
ClinPred		0.096	T
GERP RS		3.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.3
Varity_R		0.093
gMVP		0.22

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-227152924;