Variant M-12291-T-C details in Genebe, Genetics Data Aggregator

Variant summary

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

The ENST00000387456.1(MT-TL2):n.26T>C variant causes a non coding transcript exon 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: 0 )

Consequence

MT-TL2
ENST00000387456.1 non_coding_transcript_exon

Scores

Mitotip

Pathogenic

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

No linked disesase in Mitomap

Conservation

PhyloP100: 0.344

Variant links:

Genes affected

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

MT-TL2 links:

TRNL2 (HGNC:):

TRNL2 links:

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-ND5 links:

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

MT-TS2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very low frequency in mitomap database: 0.0

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TRNL2	TRNL2.1 use as main transcript	n.26T>C		non_coding_transcript_exon_variant	1/1
TRNS2	TRNS2.1 use as main transcript			downstream_gene_variant

Ensembl

Gene	Transcript	HGVSc	Effect	#exon/exons	Appris
MT-TL2	ENST00000387456.1 linkuse as main transcript	n.26T>C	non_coding_transcript_exon_variant	1/1
MT-ND5	ENST00000361567.2 linkuse as main transcript		upstream_gene_variant		P1
MT-TS2	ENST00000387449.1 linkuse as main transcript		downstream_gene_variant

Frequencies

GnomAD4 exome

Cov.:

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

Mitomap GenBank

AF:

0.0

AC:

Gnomad homoplasmic

AF:

0.000018

AC:

AN:

56426

Gnomad heteroplasmic

AF:

0.0

AC:

AN:

56426

Mitomap

No disease associated.

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Juvenile myopathy, encephalopathy, lactic acidosis AND stroke

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Wong Mito Lab, Molecular and Human Genetics, Baylor College of Medicine

Jul 12, 2019

The NC_012920.1:m.12291T>C variant in MT-TL2 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: PM7, PP6, PP7, BS4 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction