NM_001303.4:c.1193G>C

Variant names:

• chr17-14207074-G-C
• rs200942884
• NM_001303.4:c.1193G>C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_001303.4(COX10):​c.1193G>C​(p.Arg398Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R398H) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: COX10 NM_001303.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.37
• Publications: 3 publications found

Genes affected

COX10 (HGNC:2260): (cytochrome c oxidase assembly factor heme A:farnesyltransferase COX10) 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 heme A:farnesyltransferase, which is not a structural subunit but required for the expression of functional COX and functions in the maturation of the heme A prosthetic group of COX. This protein is predicted to contain 7-9 transmembrane domains localized in the mitochondrial inner membrane. A gene mutation, which results in the substitution of a lysine for an asparagine (N204K), is identified to be responsible for cytochrome c oxidase deficiency. In addition, this gene is disrupted in patients with CMT1A (Charcot-Marie-Tooth type 1A) duplication and with HNPP (hereditary neuropathy with liability to pressure palsies) deletion. [provided by RefSeq, Jul 2008]

COX10 Gene-Disease associations (from GenCC):

• mitochondrial complex IV deficiency, nuclear type 3

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• mitochondrial disease

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Leigh syndrome

  Inheritance: AR Classification: MODERATE Submitted by: ClinGen
• cytochrome-c oxidase deficiency disease

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.92

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001303.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COX10	NM_001303.4	MANE Select	c.1193G>C	p.Arg398Pro	missense	Exon 7 of 7	NP_001294.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	COX10	ENST00000261643.8	TSL:1 MANE Select	c.1193G>C	p.Arg398Pro	missense	Exon 7 of 7	ENSP00000261643.3
	COX10	ENST00000580561.1	TSL:2	n.*682G>C		non_coding_transcript_exon	Exon 6 of 6	ENSP00000462190.1
	COX10	ENST00000581931.5	TSL:2	n.*561G>C		non_coding_transcript_exon	Exon 6 of 6	ENSP00000462512.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 5

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.92
BayesDel_addAF	Pathogenic	0.45	D
BayesDel_noAF	Pathogenic	0.41
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.76	D
Eigen	Uncertain	0.66
Eigen_PC	Uncertain	0.63
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Uncertain	0.87	D
M_CAP	Uncertain	0.12	D
MetaRNN	Pathogenic	0.92	D
MetaSVM	Pathogenic	0.86	D
MutationAssessor	Uncertain	2.9	M
PhyloP100		5.4
PrimateAI	Uncertain	0.53	T
PROVEAN	Uncertain	-3.8	D
REVEL	Pathogenic	0.90
Sift	Uncertain	0.0050	D
Sift4G	Uncertain	0.024	D
Polyphen		0.93	P
Vest4		0.80
MutPred		0.74		Loss of methylation at R398 (P = 0.0067)
MVP		0.97
MPC		1.1
ClinPred		0.98	D
GERP RS		4.8
Varity_R		0.87
gMVP		0.96

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

Other links and lift over

dbSNP: rs200942884; hg19: chr17-14110391;