Viewing single variant in MT-TL1

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

MT-TL1:m.3283G>A

Tutor Research

Nomenclaturem.3283G>AchrMT:3283|Not in ClinVar

Typemitochondrial tRNA variant

InheritanceMitochondrial

gnomAD mtDNA

Absent

of 56,432 genomes

MitoTIP

13.3 · Q2 possibly pathogenic

PON-mt-tRNA

0.57 · likely pathogenic

Tutor Research

MITOMAPReported

Live entry

Disease: Late onset ocular myopathyReported 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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CTTAAAACTTTACAGTCAGAGGTTCAATTCCTCTTCTTAAC

MT-TL1

m.3263–3303 of the revised Cambridge Reference Sequence (NC_012920.1); the boxed base is m.3283 G→A.

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.3283G>A

Resolving variant against ClinVar, gnomAD and Ensembl…

MT-TL1:m.3283G>A

Where it sits in the mitochondrial genome

Population Allele Frequencies

External Resources

MT-TL1:m.3283G>A

Where it sits in the mitochondrial genome

Population Allele Frequencies

External Resources