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LIG3

Chr 17q12

DNA ligase 3

Aliases:
LIG3alpha
MANE:
ENST00000378526.9

Annotations refreshed 9 hours ago.

Predicted protein structure

Clinical relevance (Genomics England PanelApp)

Diagnostic Grade (Green)

  • Adult onset leukodystrophy

    BIALLELIC, autosomal or pseudoautosomal
  • Gastrointestinal neuromuscular disorders

    BIALLELIC, autosomal or pseudoautosomal
  • Inherited white matter disorders

    BIALLELIC, autosomal or pseudoautosomal
  • Likely inborn error of metabolism

    BIALLELIC, autosomal or pseudoautosomal
  • Mitochondrial disorders

    BIALLELIC, autosomal or pseudoautosomal
  • Mitochondrial DNA maintenance disorder

    BIALLELIC, autosomal or pseudoautosomal
  • Paediatric pseudo-obstruction syndrome

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

    BIALLELIC, autosomal or pseudoautosomal

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Disease associations (Open Targets)

  • mitochondrial DNA depletion syndrome 20 (mngie type)

    0.66
  • cerebellar ataxia

    0.55
  • Ataxia

    0.55
  • Leukoencephalopathy

    0.55
  • Neurogenic bladder

    0.55
  • macular degeneration

    0.55
  • Spasticity

    0.55
  • Cerebellar atrophy

    0.55
  • Motor stereotypy

    0.55
  • neurodegenerative disease

    0.43

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

Protein function (UniProt)

DNA ligase 3

Isoform 3 functions as a heterodimer with DNA-repair protein XRCC1 in the nucleus and can correct defective DNA strand-break repair and sister chromatid exchange following treatment with ionizing radiation and alkylating agents. Isoform 1 is targeted to mitochondria, where it functions as a DNA ligase in mitochondrial base-excision DNA repair (PubMed:10207110, PubMed:24674627)

Curated MONDO disease pages that list LIG3 among their top associated genes.

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.