M-4284-G-T

Variant names:

• chrM-4284-G-T
• rs121434468
• unassigned_transcript_4790:c.22G>T

Variant summary

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

The ENST00000000000(TRNI):​c.22G>T​(p.Val8Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Mitomap GenBank: Absent
• Consequence: TRNI ENST00000000000 missense
• Scores: Mitotip Uncertain 11
• Clinical Significance: Not reported in ClinVar No linked disesase in Mitomap
• Conservation: PhyloP100: -0.759
• Publications: 3 publications found

Genes affected

TRNI (HGNC:7488): (mitochondrially encoded tRNA isoleucine)

MT-ND2 (HGNC:7456): (mitochondrially encoded NADH dehydrogenase 2) Enables NADH dehydrogenase (ubiquinone) activity. Involved in mitochondrial electron transport, NADH to ubiquinone and mitochondrial respiratory chain complex I assembly. Part of mitochondrial respiratory chain complex I. Implicated in Leber hereditary optic neuropathy; multiple sclerosis; myocardial infarction; neurodegenerative disease (multiple); and urinary bladder cancer. [provided by Alliance of Genome Resources, Apr 2022]

MT-ND1 (HGNC:7455): (mitochondrially encoded NADH dehydrogenase 1) Enables NADH dehydrogenase (ubiquinone) activity. Involved in mitochondrial electron transport, NADH to ubiquinone and mitochondrial respiratory chain complex I assembly. Located in mitochondrial membrane. Part of mitochondrial respiratory chain complex I. Implicated in several diseases, including MELAS syndrome; neurodegenerative disease (multiple); optic nerve disease (multiple); toxic shock syndrome; and type 2 diabetes mellitus. Biomarker of Alzheimer's disease; Parkinson's disease; and multiple sclerosis. [provided by Alliance of Genome Resources, Apr 2022]

TRNM (HGNC:7492): (mitochondrially encoded tRNA methionine)

TRNQ (HGNC:7495): (mitochondrially encoded tRNA glutamine)

TRNQ Gene-Disease associations (from GenCC):

• mitochondrial disease

  Inheritance: Mitochondrial Classification: LIMITED 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
TRNI	unassigned_transcript_4790	c.22G>T	p.Val8Phe	missense_variant	Exon 1 of 1
ND2	unassigned_transcript_4793	c.-186G>T		upstream_gene_variant
TRNM	unassigned_transcript_4792	c.-118G>T		upstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MT-ND2	ENST00000361453.3	c.-186G>T		upstream_gene_variant		6		ENSP00000355046.4
MT-ND1	ENST00000361390.2	c.*22G>T		downstream_gene_variant		6		ENSP00000354687.2

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 v4.3

Name	Calibrated prediction	Score	Prediction
Mitotip	Uncertain	11
Hmtvar	Benign	0.0
PhyloP100		-0.76

Other links and lift over

dbSNP: rs121434468; hg19: chrM-4285;