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GTPBP3

Chr 19p13.11

GTP binding protein 3, mitochondrial

Aliases:
MSS1, THDF1, GTPBG3, MTGP1, FLJ14700
MANE:
ENST00000324894.13

Annotations refreshed 1 month ago.

Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • DDG2P

    BIALLELIC, autosomal or pseudoautosomal
  • Fetal anomalies

    BIALLELIC, autosomal or pseudoautosomal
  • Intellectual disability

    BIALLELIC, autosomal or pseudoautosomal
  • Likely inborn error of metabolism

    BIALLELIC, autosomal or pseudoautosomal
  • Mitochondrial disorders

    BIALLELIC, autosomal or pseudoautosomal
  • Possible mitochondrial disorder - nuclear genes

    BIALLELIC, autosomal or pseudoautosomal
  • Undiagnosed metabolic disorders

    BIALLELIC, autosomal or pseudoautosomal
  • Early onset or syndromic epilepsy

    BIALLELIC, autosomal or pseudoautosomal

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Disease associations (Open Targets)

  • Combined oxidative phosphorylation defect type 23

    0.79
  • neurodegenerative disease

    0.49
  • hereditary disease

    0.41
  • mitochondrial disease

    0.37
  • inborn mitochondrial metabolism disorder

    0.37
  • Leigh syndrome

    0.19
  • hypertrophic cardiomyopathy

    0.15
  • pneumoconiosis

    0.03
  • macular holes

    0.03
  • wet macular degeneration

    0.02

Score is the Open Targets composite evidence score (0-1). Higher = stronger gene-disease association.

Protein function (UniProt)

5-taurinomethyluridine-[tRNA] synthase subunit GTPB3, mitochondrial

GTPase component of the GTPBP3-MTO1 complex that catalyzes the 5-taurinomethyluridine (taum(5)U) modification at the 34th wobble position (U34) of mitochondrial tRNAs (mt-tRNAs), which plays a role in mt-tRNA decoding and mitochondrial translation (PubMed:29390138, PubMed:33619562). Taum(5)U formation on mammalian mt-tRNA requires the presence of both GTPBP3-mediated GTPase activity and MTO1 catalytic activity (PubMed:29390138)

Data sources: HGNC (CC BY 4.0), AlphaFold (CC BY 4.0, Jumper et al. Nature 2021), Genomics England PanelApp (CC BY 4.0), ClinGen, Open Targets (CC0), UniProt.

Not for sole clinical decision-making. Always verify against primary sources.