rs1057516061

Variant names:

• chrM-7496-T-C
• rs1057516061
• unassigned_transcript_4800:c.19A>G

Variant summary

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

The ENST00000000000(TRNS1):​c.19A>G​(p.Met7Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Mitomap GenBank: 𝑓 0.0 (AC: 3)
• Consequence: TRNS1 ENST00000000000 missense
• Scores: Mitotip Uncertain 13
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2 Hearing-Loss
• Conservation: PhyloP100: 1.64
• 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: Very low frequency in mitomap database: 0.0

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TRNS1	unassigned_transcript_4800	c.19A>G	p.Met7Val	missense_variant	Exon 1 of 1
COX2	unassigned_transcript_4802	c.-90T>C		upstream_gene_variant
TRND	unassigned_transcript_4801	c.-22T>C		upstream_gene_variant
COX1	unassigned_transcript_4799	c.*51T>C		downstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MT-TS1	ENST00000387416.2	n.19A>G		non_coding_transcript_exon_variant	Exon 1 of 1	6
MT-CO2	ENST00000361739.1	c.-90T>C		upstream_gene_variant		6		ENSP00000354876.1
MT-CO1	ENST00000361624.2	c.*51T>C		downstream_gene_variant		6		ENSP00000354499.2
MT-TD	ENST00000387419.1	n.-22T>C		upstream_gene_variant		6

Frequencies

Mitomap GenBank AF: 0.0 AC: 3

Gnomad homoplasmic AF: 0.000053 AC: 3 AN: 56430

Gnomad heteroplasmic AF: 0.0 AC: 0 AN: 56430

Mitomap

Disease(s): Hearing-Loss

Status: Reported

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

Submissions by phenotype

MELAS syndrome Uncertain:1

Jul 12, 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.7496T>C variant in MT-TS1 gene is interpreted to be a Unknown Significance variant based on the modified ACMG guidelines (unpublished). This variant meets the following evidence codes reported in the guidelines: PP3, PP6 -

Myopathy Uncertain:1

Nov 21, 2016

Center for Neuroscience and Cell Biology, University of Coimbra, Portugal

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
Mitotip	Uncertain	13
Hmtvar	Benign	0.050
PhyloP100		1.6

Other links and lift over

dbSNP: rs1057516061; hg19: chrM-7497;