M-7628-C-A

Variant names:

• chrM-7628-C-A
• rs1603221045
• unassigned_transcript_4802:c.43C>A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Mitomap GenBank: 𝑓 0.0 (AC: 2)
• Consequence: COX2 missense
• Scores: Apogee2 Pathogenic 0.56
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1 No linked disesase in Mitomap
• Conservation: PhyloP100: 4.77

Genes affected

COX2 (HGNC:7421): (mitochondrially encoded cytochrome c oxidase II) Contributes to cytochrome-c oxidase activity. Predicted to be involved in mitochondrial electron transport, cytochrome c to oxygen and positive regulation of vasoconstriction. Located in mitochondrial inner membrane. Part of respiratory chain complex IV. Biomarker of Huntington's disease and stomach cancer. [provided by Alliance of Genome Resources, Apr 2022]

TRNS1 (HGNC:7497): (mitochondrially encoded tRNA serine 1 (UCN))

COX1 (HGNC:7419): (mitochondrially encoded cytochrome c oxidase I) Contributes to cytochrome-c oxidase activity. Predicted to be involved in electron transport coupled proton transport and mitochondrial electron transport, cytochrome c to oxygen. Part of mitochondrial respiratory chain complex III and mitochondrial respiratory chain complex IV. [provided by Alliance of Genome Resources, Apr 2022]

TRND (HGNC:7478): (mitochondrially encoded tRNA aspartic acid)

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very low frequency in mitomap database: 0.0

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
COX2	unassigned_transcript_4802	c.43C>A	p.Pro15Thr	missense_variant	Exon 1 of 1
TRNS1	unassigned_transcript_4800	c.-114G>T		upstream_gene_variant
COX1	unassigned_transcript_4799	c.*183C>A		downstream_gene_variant
TRND	unassigned_transcript_4801	c.*43C>A		downstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt

Frequencies

GnomAD4 exome Cov.: 0

We have no GnomAD4 genomes data on this position. Probably position not covered by the project.

Mitomap GenBank AF: 0.0 AC: 2

Gnomad homoplasmic AF: 0.000053 AC: 3 AN: 56433

Gnomad heteroplasmic AF: 0.0 AC: 0 AN: 56433

Mitomap

No disease associated.

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Leigh syndrome Uncertain:1

Oct 17, 2019

Wong Mito Lab, Molecular and Human Genetics, Baylor College of Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The NC_012920.1:m.7628C>A (YP_003024029.1:p.Pro15Thr) variant in MTCO2 gene is interpretated to be a Uncertain Significance variant based on the modified ACMG guidelines (unpublished). This variant meets the following evidence codes: no criteria -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
Apogee2	Pathogenic	0.56
Hmtvar	Pathogenic	0.83
AlphaMissense	Pathogenic	0.58
BayesDel_addAF	Benign	-0.15	T
DEOGEN2	Benign	0.13	T
LIST_S2	Benign	0.71	T
MutationAssessor	Pathogenic	4.2	H
PROVEAN	Pathogenic	-7.8	D
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
GERP RS		5.2
Varity_R		0.42

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs1603221045; hg19: chrM-7629;