rs145034527

Variant names:

• chr1-226982107-C-A
• rs145034527
• NM_020247.5:c.811C>A

Your query was ambiguous. Multiple possible variants found:

• chr1-226982107-C-A
• chr1-226982107-C-T

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM1 PM2 PM5 PP3

The NM_020247.5(COQ8A):​c.811C>A​(p.Arg271Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,457,562 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. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R271H) has been classified as Likely pathogenic.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: COQ8A NM_020247.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.24
• Publications: 0 publications found

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]

COQ8A Gene-Disease associations (from GenCC):

• autosomal recessive ataxia due to ubiquinone deficiency

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, G2P
• coenzyme Q10 deficiency

  Inheritance: AR Classification: DEFINITIVE Submitted by: Illumina

ENSG00000288674 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

• PM1: In a hotspot region, there are 7 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 5 uncertain in NM_020247.5
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr1-226982108-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 931276.
• PP3: Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020247.5. 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
	COQ8A	NM_020247.5	MANE Select	c.811C>A	p.Arg271Ser	missense	Exon 6 of 15	NP_064632.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COQ8A	ENST00000366777.4	TSL:1 MANE Select	c.811C>A	p.Arg271Ser	missense	Exon 6 of 15	ENSP00000355739.3	Q8NI60-1
	COQ8A	ENST00000366778.5	TSL:1	c.655C>A	p.Arg219Ser	missense	Exon 6 of 15	ENSP00000355740.1	Q8NI60-3
	ENSG00000288674	ENST00000366779.6	TSL:2	n.*5538C>A		non_coding_transcript_exon	Exon 23 of 32	ENSP00000355741.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.86e-7 AC: 1 AN: 1457562 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 724818

African (AFR) AF: 0.00 AC: 0 AN: 33348

American (AMR) AF: 0.00 AC: 0 AN: 44462

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26014

East Asian (EAS) AF: 0.00 AC: 0 AN: 39470

South Asian (SAS) AF: 0.00 AC: 0 AN: 85552

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51888

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5760

European-Non Finnish (NFE) AF: 9.00e-7 AC: 1 AN: 1110792

Other (OTH) AF: 0.00 AC: 0 AN: 60276

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.38	D
BayesDel_noAF	Pathogenic	0.31
CADD	Pathogenic	29
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.60	D
Eigen	Pathogenic	0.79
Eigen_PC	Uncertain	0.65
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Pathogenic	0.54	D
MetaRNN	Pathogenic	0.91	D
MetaSVM	Pathogenic	0.80	D
PhyloP100		3.2
PrimateAI	Pathogenic	0.92	D
PROVEAN	Pathogenic	-5.4	D
REVEL	Pathogenic	0.78
Sift	Uncertain	0.0020	D
Sift4G	Uncertain	0.0020	D
Polyphen		1.0	D
Vest4		0.92
MutPred		0.54		Loss of methylation at R271 (P = 0.0244)
MVP		0.95
MPC		0.26
ClinPred		1.0	D
GERP RS		4.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.96
gMVP		0.92
Mutation Taster		=9/91	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.57		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.36		Position offset: -4
DS_DL_spliceai		0.57		Position offset: 42

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs145034527; hg19: chr1-227169808;