rs587777787

chr14-103574110-AAAG-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PM4_Supporting PP5

The NM_001370595.2(COA8):c.331_333del(p.Glu111del) variant causes a inframe deletion change. The variant allele was found at a frequency of 0.0000123 in 1,380,912 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency:
  • Genomes: not found (cov: 28)
  • Exomes 𝑓: 0.000012 (0 hom.)
• Consequence: COA8 NM_001370595.2 inframe_deletion
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 5.58

Genes affected

COA8 (HGNC:20492): (cytochrome c oxidase assembly factor 8) This gene encodes a protein that localizes to the mitochondria, where it stimulates the release of cytochrome c, thereby promoting programmed cell death. Mutations in this gene have been found in individuals with mitochondrial complex IV deficiency. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2014]

KLC1 (HGNC:6387): (kinesin light chain 1) Conventional kinesin is a tetrameric molecule composed of two heavy chains and two light chains, and transports various cargos along microtubules toward their plus ends. The heavy chains provide the motor activity, while the light chains bind to various cargos. This gene encodes a member of the kinesin light chain family. It associates with kinesin heavy chain through an N-terminal domain, and six tetratricopeptide repeat (TPR) motifs are thought to be involved in binding of cargos such as vesicles, mitochondria, and the Golgi complex. Thus, kinesin light chains function as adapter molecules and not motors per se. Although previously named "kinesin 2", this gene is not a member of the kinesin-2 / kinesin heavy chain subfamily of kinesin motor proteins. Extensive alternative splicing produces isoforms with different C-termini that are proposed to bind to different cargos; however, the full-length nature and/or biological validity of most of these variants have not been determined. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_001370595.2. Strenght limited to Supporting due to length of the change: 1aa.
• PP5: Variant 14-103574110-AAAG-A is Pathogenic according to our data. Variant chr14-103574110-AAAG-A is described in ClinVar as [Pathogenic]. Clinvar id is 156424.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
COA8	NM_001370595.2	c.331_333del	p.Glu111del	inframe_deletion	3/5	ENST00000409074.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
COA8	ENST00000409074.8	c.331_333del	p.Glu111del	inframe_deletion	3/5	1	NM_001370595.2	P1

Frequencies

GnomAD3 genomes Cov.: 28

GnomAD3 exomes AF: 0.00000961 AC: 2 AN: 208042 Hom.: 0 AF XY: 0.00000878 AC XY: 1 AN XY: 113886

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000878

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS 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: 0.0000123 AC: 17 AN: 1380912 Hom.: 0 AF XY: 0.0000131 AC XY: 9 AN XY: 687432

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.000129

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000121

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 28

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Mitochondrial complex 4 deficiency, nuclear type 17 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Sep 04, 2014

- -

Computational scores

Source: dbNSFP v4.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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

Other links and lift over

dbSNP: rs587777787; hg19: chr14-104040447;