M-12299-A-C

Position:

• chrM-12299-A-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The ENST00000387456.1(MT-TL2):​n.34A>C variant causes a non coding transcript exon change involving the alteration of a conserved nucleotide. Variant has been reported in ClinVar as not provided (no stars).

• Frequency: Mitomap GenBank: Absent
• Consequence: MT-TL2 ENST00000387456.1 non_coding_transcript_exon
• Scores: Mitotip Uncertain 13
• Clinical Significance: not provided no classification provided O:1 MELAS
• Conservation: PhyloP100: 8.70

Genes affected

MT-TL2 (HGNC:7491): (mitochondrially encoded tRNA leucine 2 (CUN))

TRNL2 (HGNC:):

MT-ND5 (HGNC:7461): (mitochondrially encoded NADH dehydrogenase 5) 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; Leigh disease; and MELAS syndrome. [provided by Alliance of Genome Resources, Apr 2022]

MT-TS2 (HGNC:7498): (mitochondrially encoded tRNA serine 2 (AGU/C))

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TRNL2	TRNL2.1	n.34A>C		non_coding_transcript_exon_variant	1/1
TRNS2	TRNS2.1			downstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MT-TL2	ENST00000387456.1	n.34A>C		non_coding_transcript_exon_variant	1/1
MT-ND5	ENST00000361567.2			upstream_gene_variant				P1
MT-TS2	ENST00000387449.1			downstream_gene_variant

Frequencies

GnomAD4 exome Cov.: 0

We have no GnomAD4 genomes data on this position. Probably position not covered by the project.

Mitomap

MELAS

ClinVar

Significance: not provided

Submissions summary: Other:1

Revision: no classification provided

Submissions by phenotype

Juvenile myopathy, encephalopathy, lactic acidosis AND stroke Other:1

not provided, no classification provided

literature only

GeneReviews

-

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
Mitotip	Uncertain	13
Hmtvar	Benign	0.25

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chrM-12300;