chrM-7664-G-T

Variant names:

• chrM-7664-G-T
• rs879139393
• ENST00000361739.1:c.79G>T

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The ENST00000361739.1(MT-CO2):​c.79G>T​(p.Ala27Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. In-silico tool predicts a benign outcome for this variant. 8/11 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A27T) has been classified as Benign.

• Frequency: Mitomap GenBank: 𝑓 0.0 (AC: 0)
• Consequence: MT-CO2 ENST00000361739.1 missense
• Scores: Apogee2 Benign 0.14
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1 No linked disesase in Mitomap
• Conservation: PhyloP100: 0.122
• Publications: 0 publications found

Genes affected

MT-CO2 (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]

MT-CO1 (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]

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

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

TRND Gene-Disease associations (from GenCC):

• mitochondrial disease

  Inheritance: Mitochondrial Classification: MODERATE Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very low frequency in mitomap database: 0.0
• BP4: Apogee2 supports a benign effect, 0.1376007 < 0.5 .

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000361739.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
There are no transcript annotations for this variant.

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MT-CO2	ENST00000361739.1	TSL:6	c.79G>T	p.Ala27Ser	missense	Exon 1 of 1	ENSP00000354876.1	P00403
	MT-CO1	ENST00000361624.2	TSL:6	c.*219G>T		downstream_gene	N/A	ENSP00000354499.2	P00395
	MT-TS1	ENST00000387416.2	TSL:6	n.-150C>A		upstream_gene	N/A

Frequencies

Mitomap GenBank AF: 0.0 AC: 0

Gnomad homoplasmic AF: 0.000053 AC: 3 AN: 56433

Gnomad heteroplasmic AF: 0.0 AC: 0 AN: 56433

Mitomap

No disease associated.

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Leigh syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
Apogee2	Benign	0.14
Hmtvar	Benign	0.34
AlphaMissense	Benign	0.19
BayesDel_addAF	Benign	-0.34	T
DEOGEN2	Benign	0.029	T
LIST_S2	Uncertain	0.88	D
MutationAssessor	Benign	1.4	L
PhyloP100		0.12
PROVEAN	Benign	-1.4	N
Sift	Uncertain	0.0020	D
Sift4G	Benign	0.064	T
GERP RS		-2.6
Varity_R		0.59
Mutation Taster		=92/8	polymorphism

Other links and lift over

dbSNP: rs879139393; hg19: chrM-7665;