10-99711831-GA-G

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BS1_Supporting BS2

The NM_078470.6(COX15):c.*2755del variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000871 in 984,910 control chromosomes in the GnomAD database, including 4 homozygotes. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0032 (3 hom., cov: 32)
  • Exomes 𝑓: 0.00044 (1 hom.)
• Consequence: COX15 NM_078470.6 3_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.220

Genes affected

COX15 (HGNC:2263): (cytochrome c oxidase assembly homolog COX15) Cytochrome c oxidase (COX), the terminal component of the mitochondrial respiratory chain, catalyzes the electron transfer from reduced cytochrome c to oxygen. This component is a heteromeric complex consisting of 3 catalytic subunits encoded by mitochondrial genes and multiple structural subunits encoded by nuclear genes. The mitochondrially-encoded subunits function in electron transfer, and the nuclear-encoded subunits may function in the regulation and assembly of the complex. This nuclear gene encodes a protein which is not a structural subunit, but may be essential for the biogenesis of COX formation and may function in the hydroxylation of heme O, according to the yeast mutant studies. This protein is predicted to contain 5 transmembrane domains localized in the mitochondrial inner membrane. Alternative splicing of this gene generates two transcript variants diverging in the 3' region. [provided by RefSeq, Jul 2008]

CUTC (HGNC:24271): (cutC copper transporter) Members of the CUT family of copper transporters are associated with copper homeostasis and are involved in the uptake, storage, delivery, and efflux of copper (Gupta et al., 1995 [PubMed 7635807]; Li et al., 2005 [PubMed 16182249]).[supplied by OMIM, Mar 2008]

ACMG classification

Verdict is Likely_benign. Variant got -5 ACMG points.

• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00321 (489/152264) while in subpopulation AFR AF= 0.0112 (467/41548). AF 95% confidence interval is 0.0104. There are 3 homozygotes in gnomad4. There are 238 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
• BS2: High Homozygotes in GnomAd at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
COX15	NM_078470.6	c.*2755del		3_prime_UTR_variant	9/9	ENST00000016171.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COX15	ENST00000016171.6	c.*2755del		3_prime_UTR_variant	9/9	1	NM_078470.6	P1
CUTC	ENST00000493385.5	n.116+9161del		intron_variant, non_coding_transcript_variant		3
COX15	ENST00000370483.9			downstream_gene_variant		1

Frequencies

GnomAD3 genomes AF: 0.00320 AC: 487 AN: 152146 Hom.: 3 Cov.: 32

Gnomad AFR AF: 0.0112

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000851

Gnomad ASJ AF: 0.00144

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00143

GnomAD4 exome AF: 0.000443 AC: 369 AN: 832646 Hom.: 1 Cov.: 23 AF XY: 0.000442 AC XY: 170 AN XY: 384532

Gnomad4 AFR exome AF: 0.0132

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00155

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000171

Gnomad4 OTH exome AF: 0.000770

GnomAD4 genome AF: 0.00321 AC: 489 AN: 152264 Hom.: 3 Cov.: 32 AF XY: 0.00320 AC XY: 238 AN XY: 74452

Gnomad4 AFR AF: 0.0112

Gnomad4 AMR AF: 0.000850

Gnomad4 ASJ AF: 0.00144

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00142

Alfa AF: 0.00270 Hom.: 0

Bravo AF: 0.00359

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Mitochondrial complex IV deficiency, nuclear type 1 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

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Computational scores

Source: dbNSFP v4.3

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs145731044; hg19: chr10-101471588;