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Possible mitochondrial disorder - nuclear genes

Gene: POLG

Green List (high evidence)

POLG (DNA polymerase gamma, catalytic subunit)
EnsemblGeneIds (GRCh38): ENSG00000140521
EnsemblGeneIds (GRCh37): ENSG00000140521
OMIM: 174763, Gene2Phenotype
POLG is in 31 panels

4 reviews

Ivone Leong (Genomics England Curator)

Green List (high evidence)

Initial gene list and info collated by Carl Fratter (Oxford University Hospitals NHS Trust) January 2019 on behalf of the GMS Mitochondrial specialist test group.
Created: 4 Feb 2019, 1:36 p.m.

Mode of inheritance
BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal

Phenotypes
Mitochondrial DNA depletion syndrome 4A (Alpers type), 203700; Mitochondrial DNA depletion syndrome 4B (MNGIE type), 613662; Mitochondrial recessive ataxia syndrome (includes SANDO and SCAE), 607459; Progressive external ophthalmoplegia, autosomal dominant 1, 157640; Progressive external ophthalmoplegia, autosomal recessive 1, 258450

Carl Fratter (Oxford University Hospitals NHS Trust)

Green List (high evidence)

Mode of inheritance
BOTH monoallelic and biallelic, autosomal or pseudoautosomal

Variants in this GENE are reported as part of current diagnostic practice

Ellen McDonagh (Genomics England Curator)

Comment on mode of inheritance: Sourced from reviewer. Biallelic on G2P for Mitochondrial DNA depletion syndrome 4A. From OMIM: Autosomal recessive for several disorders, but autosomal dominant for Progressive external ophthalmoplegia, autosomal dominant 1.
Created: 10 Feb 2016, 9:29 a.m.
Comment on list classification: Both reviewers agree this should be promoted from amber. Confirmed DD gene in G2P.
Created: 10 Feb 2016, 9:26 a.m.

Shamima Rahman (UCL Institute of Child Health)

Green List (high evidence)

Details

Mode of Inheritance
BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal
Sources
  • NHS GMS
  • Expert Review Green
Phenotypes
  • Mitochondrial DNA depletion syndrome 4A (Alpers type), 203700
  • Mitochondrial recessive ataxia syndrome (includes SANDO and SCAE), 607459
  • Mitochondrial DNA depletion syndrome 4B (MNGIE type), 613662
  • Progressive external ophthalmoplegia, autosomal dominant 1, 157640
  • Progressive external ophthalmoplegia, autosomal recessive 1, 258450
OMIM
174763
Clinvar variants
Variants in POLG
Penetrance
None
Panels with this gene

History Filter Activity

4 Feb 2019, Gel status: 4

Created, Added New Source, Set mode of inheritance, Set Phenotypes

Ivone Leong (Genomics England Curator)

gene: POLG was added gene: POLG was added to Possible mitochondrial disorder - nuclear genes. Sources: Expert Review Green,NHS GMS Mode of inheritance for gene: POLG was set to BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal Phenotypes for gene: POLG were set to Mitochondrial DNA depletion syndrome 4A (Alpers type), 203700; Mitochondrial recessive ataxia syndrome (includes SANDO and SCAE), 607459; Mitochondrial DNA depletion syndrome 4B (MNGIE type), 613662; Progressive external ophthalmoplegia, autosomal dominant 1, 157640; Progressive external ophthalmoplegia, autosomal recessive 1, 258450