chrM-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.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TRNS1	unassigned_transcript_4800	c.22G>T	p.Gly8Trp	missense_variant	Exon 1 of 1
COX2	unassigned_transcript_4802	c.-93C>A		upstream_gene_variant
TRND	unassigned_transcript_4801	c.-25C>A		upstream_gene_variant
COX1	unassigned_transcript_4799	c.*48C>A		downstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MT-TS1	ENST00000387416.2	n.22G>T		non_coding_transcript_exon_variant	Exon 1 of 1	6
MT-CO2	ENST00000361739.1	c.-93C>A		upstream_gene_variant		6		ENSP00000354876.1
MT-CO1	ENST00000361624.2	c.*48C>A		downstream_gene_variant		6		ENSP00000354499.2
MT-TD	ENST00000387419.1	n.-25C>A		upstream_gene_variant		6

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 v4.3

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;