Genetic Variant COX20:c.-38C>G (chr1-244835677-C-G) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_198076.6(COX20):c.-38C>G variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000243 in 1,234,942 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000026 ( 0 hom. )

Consequence

COX20
NM_198076.6 5_prime_UTR

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -1.28

Publications

0 publications found

Variant links:

Genes affected

COX20 (HGNC:26970): (cytochrome c oxidase assembly factor COX20) This gene encodes a protein that plays a role in the assembly of cytochrome C oxidase, an important component of the respiratory pathway. It contains two transmembrane helices and localizes to the mitochondrial membrane. Mutations in this gene can cause mitochondrial complex IV deficiency, which results in ataxia and muscle hypotonia. There are multiple pseudogenes for this gene. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2015]

COX20 Gene-Disease associations (from GenCC):

mitochondrial disease
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
mitochondrial complex IV deficiency, nuclear type 11
Inheritance: AR Classification: STRONG Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
cytochrome-c oxidase deficiency disease
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

COX20 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.8).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_198076.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
COX20	NM_198076.6	MANE Select	c.-38C>G	5_prime_UTR	Exon 1 of 4	NP_932342.1	Q5RI15-1
COX20	NM_001312872.1		c.-38C>G	5_prime_UTR	Exon 1 of 5	NP_001299801.1	B3KM21
COX20	NM_001312871.1		c.-38C>G	5_prime_UTR	Exon 2 of 5	NP_001299800.1	Q5RI15-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
COX20	ENST00000411948.7	TSL:1 MANE Select	c.-38C>G	5_prime_UTR	Exon 1 of 4	ENSP00000406327.2	Q5RI15-1
COX20	ENST00000391839.6	TSL:1	n.22C>G	non_coding_transcript_exon	Exon 1 of 3
COX20	ENST00000366528.3	TSL:2	c.-38C>G	5_prime_UTR	Exon 1 of 5	ENSP00000355486.3	Q5RI15-2

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

151864

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00

AC:

AN:

1096

AF XY:

0.00

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000259

AC:

AN:

1083078

Hom.:

Cov.:

AF XY:

0.0000234

AC XY:

AN XY:

512882

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

22826

American (AMR)

AF:

0.00

AC:

AN:

8368

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

14326

East Asian (EAS)

AF:

0.00

AC:

AN:

26364

South Asian (SAS)

AF:

0.00

AC:

AN:

22080

European-Finnish (FIN)

AF:

0.00

AC:

AN:

22026

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2928

European-Non Finnish (NFE)

AF:

0.0000293

AC:

AN:

920530

Other (OTH)

AF:

0.0000229

AC:

AN:

43630

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.541

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000132

AC:

AN:

151864

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74178

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41356

American (AMR)

AF:

0.00

AC:

AN:

15248

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5150

South Asian (SAS)

AF:

0.00

AC:

AN:

4796

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10594

Middle Eastern (MID)

AF:

0.00

AC:

AN:

310

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

67940

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000151

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.80

CADD

Benign

6.4

(source)

DANN

Benign

0.46

PhyloP100

-1.3

PromoterAI

0.19

Neutral

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over