Viewing single variant in MT-TI

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

MT-TI:m.4281A>G

Tutor Research

Nomenclaturem.4281A>GchrMT:4281|Not in ClinVar

Typemitochondrial tRNA variant

InheritanceMitochondrial

gnomAD mtDNA

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not loaded

MitoTIP

17.8 · Q1 likely pathogenic

Tutor Research

MITOMAPReported

Live entry

Disease: Recurrent MyoglobinuriaReported as: heteroplasmicGenBank: 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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TAAGAAATATGTCTGATAAAAGAGTTACTTTGATAGAGTAA

MT-ND1 · ends m.4262

MT-TI · starts m.4263

m.4261–4301 of the revised Cambridge Reference Sequence (NC_012920.1); the boxed base is m.4281 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-TI →

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.4281A>G

Resolving variant against ClinVar, gnomAD and Ensembl…

MT-TI:m.4281A>G

Where it sits in the mitochondrial genome

Population Allele Frequencies

External Resources

MT-TI:m.4281A>G

Where it sits in the mitochondrial genome

Population Allele Frequencies

External Resources