NM_198076.6:c.157+3G>C

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PP3_ModeratePP5_Very_Strong

The NM_198076.6(COX20):c.157+3G>C variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000876 in 1,587,306 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 1/1 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.00063 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00090 ( 0 hom. )

Consequence

COX20
NM_198076.6 splice_region, intron

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:12U:3

Conservation

PhyloP100: 1.62

Publications

7 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 links:

HNRNPU (HGNC:5048): (heterogeneous nuclear ribonucleoprotein U) This gene encodes a member of a family of proteins that bind nucleic acids and function in the formation of ribonucleoprotein complexes in the nucleus with heterogeneous nuclear RNA (hnRNA). The encoded protein has affinity for both RNA and DNA, and binds scaffold-attached region (SAR) DNA. Mutations in this gene have been associated with epileptic encephalopathy, early infantile, 54. A pseudogene of this gene has been identified on chromosome 14. [provided by RefSeq, Jun 2017]

HNRNPU Gene-Disease associations (from GenCC):

complex neurodevelopmental disorder
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
developmental and epileptic encephalopathy, 54
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P

HNRNPU links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 10 ACMG points.

PP3

Splicing predictors support a deleterious effect. Scorers claiming Pathogenic: max_spliceai. No scorers claiming Uncertain. No scorers claiming Benign.

PP5

Variant 1-244842061-G-C is Pathogenic according to our data. Variant chr1-244842061-G-C is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 380082.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

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.157+3G>C	splice_region intron	N/A	NP_932342.1	Q5RI15-1
COX20	NM_001312872.1		c.193+3G>C	splice_region intron	N/A	NP_001299801.1	B3KM21
COX20	NM_001312871.1		c.157+3G>C	splice_region intron	N/A	NP_001299800.1	Q5RI15-1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
COX20	ENST00000411948.7	TSL:1 MANE Select	c.157+3G>C		splice_region intron	N/A	ENSP00000406327.2	Q5RI15-1
COX20	ENST00000391839.6	TSL:1	n.102-134G>C		intron	N/A
COX20	ENST00000925251.1		c.160G>C	p.Glu54Gln	missense splice_region	Exon 2 of 4	ENSP00000595310.1

Frequencies

GnomAD3 genomes

AF:

0.000632

AC:

AN:

151860

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000266

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000197

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000571

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00109

Gnomad OTH

AF:

0.000957

GnomAD2 exomes

AF:

0.000568

AC:

142

AN:

249980

AF XY:

0.000606

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.0000876

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000185

Gnomad NFE exome

AF:

0.00114

Gnomad OTH exome

AF:

0.000492

GnomAD4 exome

AF:

0.000902

AC:

1295

AN:

1435446

Hom.:

Cov.:

AF XY:

0.000854

AC XY:

611

AN XY:

715794

show subpopulations

African (AFR)

AF:

0.0000916

AC:

AN:

32756

American (AMR)

AF:

0.000113

AC:

AN:

44342

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25918

East Asian (EAS)

AF:

0.00

AC:

AN:

39528

South Asian (SAS)

AF:

0.00

AC:

AN:

85434

European-Finnish (FIN)

AF:

0.000187

AC:

AN:

53366

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5686

European-Non Finnish (NFE)

AF:

0.00113

AC:

1234

AN:

1088900

Other (OTH)

AF:

0.000722

AC:

AN:

59516

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

138

206

275

344

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

132

176

220

<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:

0.000632

AC:

AN:

151860

Hom.:

Cov.:

AF XY:

0.000634

AC XY:

AN XY:

74134

show subpopulations

African (AFR)

AF:

0.000266

AC:

AN:

41340

American (AMR)

AF:

0.000197

AC:

AN:

15254

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5186

South Asian (SAS)

AF:

0.00

AC:

AN:

4814

European-Finnish (FIN)

AF:

0.000571

AC:

AN:

10514

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00109

AC:

AN:

67966

Other (OTH)

AF:

0.000957

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.496

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.000386

Hom.:

Bravo

AF:

0.000563

EpiCase

AF:

0.000928

EpiControl

AF:

0.000711

ClinVar

ClinVar submissions

Significance:Pathogenic/Likely pathogenic

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Mitochondrial complex IV deficiency, nuclear type 11 (8)

not provided (6)

Mitochondrial complex IV deficiency, nuclear type 1 (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.45

CADD

Benign

(source)

DANN

Benign

0.91

PhyloP100

1.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Mutation Taster

=2/98

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.81

Details are displayed if max score is > 0.2

DS_DL_spliceai

0.81

Position offset: -3

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over