NM_198076.6:c.87C>T

Variant names:

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 2P and 11B. PM2BP4_ModerateBP6_Very_StrongBP7

The NM_198076.6(COX20):c.87C>T(p.Cys29Cys) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000573 in 1,611,002 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.00051 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00058 ( 0 hom. )

Consequence

COX20
NM_198076.6 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 2.33

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.41).

BP6

Variant 1-244841988-C-T is Benign according to our data. Variant chr1-244841988-C-T is described in ClinVar as [Benign]. Clinvar id is 377749.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr1-244841988-C-T is described in Lovd as [Likely_benign].

BP7

Synonymous conserved (PhyloP=2.33 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COX20	NM_198076.6 link	c.87C>T	p.Cys29Cys	synonymous_variant	Exon 2 of 4	ENST00000411948.7	NP_932342.1	Q5RI15-1B3KM21

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
COX20	ENST00000411948.7 link	c.87C>T	p.Cys29Cys	synonymous_variant	Exon 2 of 4	1	NM_198076.6	ENSP00000406327.2		Q5RI15-1

Frequencies

GnomAD3 genomes

AF:

0.000513

AC:

AN:

152064

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000197

Gnomad ASJ

AF:

0.00317

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000779

Gnomad OTH

AF:

0.000480

GnomAD3 exomes

AF:

0.000538

AC:

135

AN:

251036

Hom.:

AF XY:

0.000538

AC XY:

AN XY:

135758

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.00347

Gnomad EAS exome

AF:

0.0000545

Gnomad SAS exome

AF:

0.0000654

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.000757

Gnomad OTH exome

AF:

0.000491

GnomAD4 exome

AF:

0.000579

AC:

845

AN:

1458820

Hom.:

Cov.:

AF XY:

0.000579

AC XY:

420

AN XY:

725808

show subpopulations

Gnomad4 AFR exome

AF:

0.000150

Gnomad4 AMR exome

AF:

0.0000895

Gnomad4 ASJ exome

AF:

0.00302

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000349

Gnomad4 FIN exome

AF:

0.0000936

Gnomad4 NFE exome

AF:

0.000638

Gnomad4 OTH exome

AF:

0.000581

GnomAD4 genome

AF:

0.000513

AC:

AN:

152182

Hom.:

Cov.:

AF XY:

0.000511

AC XY:

AN XY:

74402

show subpopulations

Gnomad4 AFR

AF:

0.000241

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00317

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000779

Gnomad4 OTH

AF:

0.000475

Alfa

AF:

0.00104

Hom.:

Bravo

AF:

0.000457

EpiCase

AF:

0.000654

EpiControl

AF:

0.000533

ClinVar

Significance: Benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Jan 21, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 22, 2016

Mayo Clinic Laboratories, Mayo Clinic

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

not specified

Benign:1

Jun 19, 2015

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.41

CADD

Benign

7.8

DANN

Benign

0.76

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over