Mitochondrial DNA maintenance disorder
Gene: TWNK
Gene list provided by Carl Fratter (Oxford University Hospitals NHS Trust) in August 2022 on behalf of the three GMS Mitochondrial providers, supporting the Green rating of this gene on this panel based on current evidence.Created: 30 Aug 2022, 9:31 a.m. | Last Modified: 30 Aug 2022, 9:31 a.m.
Panel Version: 1.16
Mode of inheritance
BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal
Phenotypes
Progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal dominant 3, OMIM: 609286; Perrault syndrome 5, OMIM: 616138; Mitochondrial DNA depletion syndrome 7 (hepatocerebral type), OMIM 271245
Variants in this GENE are reported as part of current diagnostic practice
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. Gene Symbol submitted: TWNK; Suggested intial gene rating: Green; Information provided: Mode of inheritance and phenotype.Created: 1 Feb 2019, 4:28 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 7 (hepatocerebral type), 271245; Progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal dominant 3, 609286
Mode of inheritance
BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal
Variants in this GENE are reported as part of current diagnostic practice
added new-gene-name tag, HGNC Approved Gene Symbol is TWNKCreated: 22 May 2017, 11:38 a.m.
This gene was submitted as "PEO1" by two experts, which likely corresponds to this HGNC-approved symbol. Illumina source has this gene as both dominant (for Progressive External Ophthalmoplegia with Mitochondrial DNA Deletions) and recessive (for Mitochondrial Membrane Protein-Associated Neurodegeneration and Mitochondrial DNA Depletion Syndrome).Created: 1 Jul 2015, 2:36 p.m.
Phenotypes for gene: TWNK were changed from Mitochondrial DNA depletion syndrome 7 (hepatocerebral type), 271245; Progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal dominant 3, 609286 to Mitochondrial DNA depletion syndrome 7 (hepatocerebral type), OMIM:271245; Progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal dominant 3, OMIM:609286; Perrault syndrome 5, OMIM:616138
gene: TWNK was added gene: TWNK was added to Mitochondrial DNA maintenance disorder. Sources: Expert Review Green,NHS GMS Mode of inheritance for gene: TWNK was set to BOTH monoallelic and biallelic (but BIALLELIC mutations cause a more SEVERE disease form), autosomal or pseudoautosomal Phenotypes for gene: TWNK were set to Mitochondrial DNA depletion syndrome 7 (hepatocerebral type), 271245; Progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal dominant 3, 609286