Viewing single variant in MT-TK

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

MT-TK:m.8339A>G

Tutor Research

Nomenclaturem.8339A>GchrMT:8339|Not in ClinVar

Typemitochondrial tRNA variant

InheritanceMitochondrial

gnomAD mtDNA

Absent

~56k genomes

MitoTIP

12.5 · Q3 possibly benign

Tutor Research

MITOMAPReported

Live entry

Disease: Hearing loss patientGenBank: 1 sequence

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

Where it sits in the mitochondrial genome

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

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ACCTTTTAAGTTAAAGATTAAGAGAACCAACACCTCTTTAC

MT-TK

m.8319–8359 of the revised Cambridge Reference Sequence (NC_012920.1); the boxed base is m.8339 A→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-TK →

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.8339A>G

Resolving variant against ClinVar, gnomAD and Ensembl…

MT-TK:m.8339A>G

Where it sits in the mitochondrial genome

Population Allele Frequencies

External Resources

MT-TK:m.8339A>G

Where it sits in the mitochondrial genome

Population Allele Frequencies

External Resources