M-7493-C-A

Variant names:

• chrM-7493-C-A
• rs397515728
• unassigned_transcript_4800:c.22G>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The ENST00000000000(TRNS1):​c.22G>T​(p.Gly8Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. 3/3 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Mitomap GenBank: Absent
• Consequence: TRNS1 ENST00000000000 missense
• Scores: Mitotip Benign 3.0
• Clinical Significance: Not reported in ClinVar No linked disesase in Mitomap
• Conservation: PhyloP100: -1.62
• Publications: 0 publications found

Genes affected

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

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]

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 2 ACMG points.

• PM2: No frequency data in Mitomap. Probably very rare.

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000387416.2. 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

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MT-TS1	ENST00000387416.2	TSL:6	n.22G>T		non_coding_transcript_exon	Exon 1 of 1
	MT-CO2	ENST00000361739.1	TSL:6	c.-93C>A		upstream_gene	N/A	ENSP00000354876.1
	MT-CO1	ENST00000361624.2	TSL:6	c.*48C>A		downstream_gene	N/A	ENSP00000354499.2

Frequencies

Mitomap GenBank The variant is not present, suggesting it is rare .

Mitomap

No disease associated.

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
Mitotip	Benign	3.0
Hmtvar	Benign	0.0
PhyloP100		-1.6

Other links and lift over

dbSNP: rs397515728; hg19: chrM-7494;