Viewing single variant in MT-TL1

Uncertain Significance (VUS)Not in ClinVar or MITOMAP — mtDNA classification needs case-level review

MT-TL1:m.3254C>G

Tutor Research

Nomenclaturem.3254C>GchrMT:3254|Not in ClinVar

Typemitochondrial tRNA variant

InheritanceMitochondrial

gnomAD mtDNA

Absent

~56k genomes

MitoTIP

13.8 · Q2 possibly pathogenic

Tutor Research

Some data sources returned errors (1) — other data may still be shown below

gnomad: gnomAD lookup failed: Error: gnomAD API error: 400

MITOMAPReported

Live entry

Disease: Mitochondrial myopathy (MM)Reported as: heteroplasmicGenBank: 0 sequences

MITOMAP (mitomap.org), CC BY 3.0 · disease table as of 2026-10-07

Where it sits in the mitochondrial genome

Tap or hover a gene, landmark or tick; genes open their page, ticks their variant.

proteinrRNAtRNAouter ring H-strand · inner L-strandMITOMAP confirmedreported (as of 2026-10-07)

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AGATGGCAGAGCCCGGTAATCGCATAAAACTTAAAACTTTA

MT-TL1

m.3234–3274 of the revised Cambridge Reference Sequence (NC_012920.1); the boxed base is m.3254 C→G.

37 genes from Ensembl (rCRS numbering, matched to MITOMAP’s Gene Loci); landmarks and disease alleles from MITOMAP (CC BY 3.0). Circular layout after MitoWheel.

Open Research Assistant for MT-TL1 →

External Resources

Franklin (Genoox)

AI-powered curation

MITOMAP

mtDNA variant database · expect a security check

VarSome

Variant interpretation · expect a security check

OMIM

Gene & phenotype

gnomAD

mtDNA frequencies (v3.1)

UCSC Browser

Genome browser

m.3254C>G

Resolving variant against ClinVar, gnomAD and Ensembl…

MT-TL1:m.3254C>G

Where it sits in the mitochondrial genome

Population Allele Frequencies

External Resources

MT-TL1:m.3254C>G

Where it sits in the mitochondrial genome

Population Allele Frequencies

External Resources