Activity

Filter

Cancel
Date Panel Item Activity
62 actions
Undiagnosed metabolic disorders v1.581 PC Arina Puzriakova Phenotypes for gene: PC were changed from Pyruvate carboxylase deficiency (Disorders of gluconeogenesis); lactic acidosis, hypotonia, encephalopathy; Pyruvate carboxylase deficiency 266150; Pyruvate carboxylase deficiency to Pyruvate carboxylase deficiency, OMIM:266150
Undiagnosed metabolic disorders v1.579 SUCLA2 Arina Puzriakova Phenotypes for gene: SUCLA2 were changed from Required for mtDNA maintenance (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Disorders of mitochondrial DNA maintenance and integrity; Mitochondrial DNA depletion syndrome 5 (encephalomyopathic with or without methylmalonicaciduria), 612073; Mitochondrial DNA Depletion Syndrome to Mitochondrial DNA depletion syndrome 5 (encephalomyopathic with or without methylmalonic aciduria), OMIM:612073; Required for mtDNA maintenance (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Disorders of mitochondrial DNA maintenance and integrity
Undiagnosed metabolic disorders v1.571 COX15 Arina Puzriakova Phenotypes for gene: COX15 were changed from Complex IV (Mitochondrial respiratory chain disorders (caused by nuclear variants only), OXPHOS assembly factors); Isolated complex IV deficiency; Leigh syndrome due to cytochrome c oxidase deficiency, 256000Cardioencephalomyopathy, fatal infantile, due to cytochrome c oxidase deficiency 2, 615119; Mitochondrial Diseases; Mitochondrial Respiratory Chain Complex IV Deficiency to Mitochondrial complex IV deficiency, nuclear type 6, OMIM:615119
Undiagnosed metabolic disorders v1.570 COX10 Arina Puzriakova Phenotypes for gene: COX10 were changed from Complex IV (Mitochondrial respiratory chain disorders (caused by nuclear variants only), OXPHOS assembly factors); Isolated complex IV deficiency; Encephalopathy, progressive mitochondrial, with proximal renal tubulopathy due to cytochrome coxidase deficiency; Mitochondrial Diseases; Mitochondrial Respiratory Chain Complex IV Deficiency to Mitochondrial complex IV deficiency, nuclear type 3, OMIM:619046; Encephalopathy, progressive mitochondrial, with proximal renal tubulopathy due to cytochrome coxidase deficiency
Undiagnosed metabolic disorders v1.567 GPHN Arina Puzriakova Phenotypes for gene: GPHN were changed from Mo cofactor deficiency, complementation group C (Disorders of molybdenum cofactor metabolism); epileptic encephalopathy; Molybdenum cofactor deficiency C 615501 to Molybdenum cofactor deficiency C, OMIM:615501; Mo cofactor deficiency, complementation group C (Disorders of molybdenum cofactor metabolism)
Undiagnosed metabolic disorders v1.563 ST3GAL3 Sarah Leigh Phenotypes for gene: ST3GAL3 were changed from ST3GAL3-CDG (Disorders of protein N-glycosylation); Intellectual disability to Developmental and epileptic encephalopathy 15, OMIM:615006; developmental and epileptic encephalopathy, 15, MONDO:0014003; Intellectual developmental disorder, autosomal recessive 12, OMIM:611090; intellectual disability, autosomal recessive 12, MONDO:0012612
Undiagnosed metabolic disorders v1.561 TWNK Arina Puzriakova Phenotypes for gene: TWNK were changed from Required for mtDNA maintenance (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Disorders of mitochondrial DNA maintenance and integrity; Progressive external ophthalmoplegia, autosomal dominant, 3, 609286; Mitochondrial DNA depletion syndrome 7 (hepatocerebral type), 271245; Mitochondrial DNA Depletion Syndrome; Progressive External Ophthalmoplegia with Mitochondrial DNA Deletions (monoallelic); Mitochondrial Membrane Protein-Associated Neurodegeneration (biallelic); Mitochondrial DNA Depletion Syndrome (biallelic) 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
Undiagnosed metabolic disorders v1.558 POLG2 Arina Puzriakova Phenotypes for gene: POLG2 were changed from Required for mtDNA maintenance (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Disorders of mitochondrial DNA maintenance and integrity; Progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal dominant 4,610131; Progressive External Ophthalmoplegia with Mitochondrial DNA Deletions to Mitochondrial DNA depletion syndrome syndrome 16 (hepatic type), OMIM:618528; Mitochondrial DNA depletion syndrome 16B (neuroophthalmic type), OMIM:619425; Progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal dominant 4, OMIM:610131
Undiagnosed metabolic disorders v1.551 SDHA Arina Puzriakova Added comment: Comment on mode of inheritance: This gene was recently included on a gene list provided by Carl Fratter (Oxford University Hospitals NHS Trust) on behalf of GMS Mitochondrial providers, indicating that the MOI should be updated from 'biallelic' only to 'both mono- and biallelic' on Mitochondrial GMS panels (R354 and R63). As there was sufficient supporting evidence for the change, the MOI has also been updated to 'both' on this panel to ensure all panels reflect correct knowledge. Heterozygous variants can be associated with abnormal mitochondrial accumulation and therefore also within the scope of the panel.
Undiagnosed metabolic disorders v1.527 OPA1 Arina Puzriakova Phenotypes for gene: OPA1 were changed from Disorders of mitochondrial dynamics, fusion and fission (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Disorders of mitochondrial DNA maintenance and integrity; Optic atrophy 1, 165500; {Glaucoma, normal tension, susceptibility to}, 606657; Optic atrophy plus syndrome, 125250; Mitochondrial DNA Depletion Syndrome; Progressive External Ophthalmoplegia with Mitochondrial DNA Deletions to Optic atrophy 1, OMIM:165500; Optic atrophy plus syndrome, OMIM:125250; Mitochondrial DNA depletion syndrome 14 (encephalocardiomyopathic type), OMIM:616896; Behr syndrome, OMIM:210000
Undiagnosed metabolic disorders v1.506 CPT2 Arina Puzriakova Phenotypes for gene: CPT2 were changed from Carnitine palmitoyltransferase II (CPTII) deficiency (Disorders of carnitine transport and the carnitine cycle); CPT deficiency, hepatic, type II 600649; CPT II deficiency, lethal neonatal 608836 to CPT II deficiency, infantile, OMIM:600649; CPT II deficiency, lethal neonatal, OMIM:608836; CPT II deficiency, myopathic, stress-induced, OMIM:255110; Carnitine palmitoyltransferase II (CPTII) deficiency (Disorders of carnitine transport and the carnitine cycle)
Undiagnosed metabolic disorders v1.495 CLPB Arina Puzriakova Phenotypes for gene: CLPB were changed from 3-methylglutaconic aciduria with the following: cataract, renal cysts and nephrocalcinosis; progressive brain atrophy, intellectual disability, congenital neutropenia, cataracts, movement disorder; cataract, neutropenia, epilepsy; congenital microcephaly and severe encephalopathy to 3-methylglutaconic aciduria, type VII, with cataracts, neurologic involvement and neutropenia, OMIM:616271
Undiagnosed metabolic disorders v1.493 GLS Arina Puzriakova Phenotypes for gene: GLS were changed from Global developmental delay, progressive ataxia, and elevated glutamine, OMIM:618412; Global developmental delay, progressive ataxia, and elevated glutamine, MONDO:0032733; Developmental and epileptic encephalopathy 71, OMIM:618328; Developmental and epileptic encephalopathy, 71, MONDO:0032678; ?Infantile cataract, skin abnormalities, glutamate excess, and impaired intellectual development, OMIM:618339; Infantile cataract, skin abnormalities, glutamate excess, and impaired intellectual development, MONDO:0032685 to Global developmental delay, progressive ataxia, and elevated glutamine, OMIM:618412; Developmental and epileptic encephalopathy 71, OMIM:618328; ?Infantile cataract, skin abnormalities, glutamate excess, and impaired intellectual development, OMIM:618339
Undiagnosed metabolic disorders v1.480 SERAC1 Arina Puzriakova Phenotypes for gene: SERAC1 were changed from Methylglutaconic aciduria with deafness, encephalopathy and Leigh-like syndrome (MEGDEL) (Organic acidurias); Disorders of mitochondrial membrane lipids (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Multiple respiratory chain complex deficiencies (disorders of protein synthesis); 3-methylglutaconic aciduria with deafness, encephalopathy, and Leigh-like syndrome, 614739 to 3-methylglutaconic aciduria with deafness, encephalopathy, and Leigh-like syndrome, OMIM:614739; Disorders of mitochondrial membrane lipids (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Multiple respiratory chain complex deficiencies (disorders of protein synthesis)
Undiagnosed metabolic disorders v1.479 FDX2 Sarah Leigh Phenotypes for gene: FDX2 were changed from Mitochondrial myopathy, episodic, with optic atrophy and reversible leukoencephalopathy 251900 to Mitochondrial myopathy, episodic, with optic atrophy and reversible leukoencephalopathy OMIM:251900; mitochondrial myopathy, episodic, with optic atrophy and reversible leukoencephalopathy MONDO:0020714
Undiagnosed metabolic disorders v1.473 APOA1 Sarah Leigh Phenotypes for gene: APOA1 were changed from Apolipoprotein A-I deficiency (Disorders of high density lipoprotein metabolism); Amyloidosis, 3 or more types 105200; ApoA-I and apoC-III deficiency, combined; Corneal clouding, autosomal recessive; Hypoalphalipoproteinemia 604091 to Amyloidosis, 3 or more types OMIM:105200; familial visceral amyloidosis MONDO:0007099; ApoA-I and apoC-III deficiency, combined OMIM:618463; Hypoalphalipoproteinemia, primary, 2, with or without corneal clouding OMIM:618463; hypoalphalipoproteinemia, primary, 2 MONDO:0032766
Undiagnosed metabolic disorders v1.466 ATAD3A Arina Puzriakova Phenotypes for gene: ATAD3A were changed from Lactic acidosis; Methylglutaconic aciduria; Neurological abnormalities; Cerebellar hypoplasia; Optic atrophy; Hypertrophic cardiomyopathy; Scoliosis; Spinal muscular atrophy to Harel-Yoon syndrome, OMIM:617183; Pontocerebellar hypoplasia, hypotonia, and respiratory insufficiency syndrome, neonatal lethal, OMIM:618810; Lactic acidosis; Methylglutaconic aciduria
Undiagnosed metabolic disorders v1.441 MSMO1 Arina Puzriakova Phenotypes for gene: MSMO1 were changed from Sterol-C4-methyl oxidase deficiency (Disorders of sterol biosynthesis); Microcephaly, congenital cataract, and psoriasiform dermatitis, 616834; (SC4MOL DEFICIENCY) to Sterol-C4-methyl oxidase deficiency (Disorders of sterol biosynthesis); Microcephaly, congenital cataract, and psoriasiform dermatitis, OMIM:616834; Microcephaly-congenital cataract-psoriasiform dermatitis syndrome, MONDO:0014793
Undiagnosed metabolic disorders v1.439 GLS Arina Puzriakova Phenotypes for gene: GLS were changed from Glucosidase 1 deficiency (Disorders of protein N-glycosylation) to Global developmental delay, progressive ataxia, and elevated glutamine, OMIM:618412; Global developmental delay, progressive ataxia, and elevated glutamine, MONDO:0032733; Developmental and epileptic encephalopathy 71, OMIM:618328; Developmental and epileptic encephalopathy, 71, MONDO:0032678; ?Infantile cataract, skin abnormalities, glutamate excess, and impaired intellectual development, OMIM:618339; Infantile cataract, skin abnormalities, glutamate excess, and impaired intellectual development, MONDO:0032685
Undiagnosed metabolic disorders v1.436 GLS Arina Puzriakova reviewed gene: GLS: Rating: GREEN; Mode of pathogenicity: None; Publications: 30970188, 30575854, 30239721; Phenotypes: Global developmental delay, progressive ataxia, and elevated glutamine, OMIM:618412, Global developmental delay, progressive ataxia, and elevated glutamine, MONDO:0032733, Developmental and epileptic encephalopathy 71, OMIM:618328, Developmental and epileptic encephalopathy, 71, MONDO:0032678, ?Infantile cataract, skin abnormalities, glutamate excess, and impaired intellectual development, OMIM:618339, Infantile cataract, skin abnormalities, glutamate excess, and impaired intellectual development, MONDO:0032685; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Undiagnosed metabolic disorders v1.417 ALG14 Sarah Leigh Added comment: Comment on list classification: Associated with Myasthenic syndrome, congenital, 15, without tubular aggregates 616227 in OMIM, but not associated with phenotype in Gen2Phen. At least 6 variants reported in at least 5 cases with varying phenotypes. PMID 23404334 reports compound heterozygous (p.P65L, P.R104*) sibs, who manifested with myasthenic syndromes, but did not have intellectural disability nor seizures and were 62 and 51 years old when reported. PMID 28733338 reports two compound heterozygous (p.D74N, pV141G), (p.D74N, p.R109Q) cases and a homozygous (p.D74N), with early and lethal neurodegeneration with myasthenic and myopathic features, but the cases died before intellectual disability was manifiest. However, seizures were evident in two compound heterozygous families. PMID 30221345 reports a homozygous splicing variant in a case with intellectual disability and seizures. Functional studies were presented showing that this variant resulting in exon skipping, however, this was not completely prenetrant as wild type protein was detected at a low level in the patient.
Undiagnosed metabolic disorders v1.387 ST3GAL3 Catherine Snow reviewed gene: ST3GAL3: Rating: GREEN; Mode of pathogenicity: None; Publications: 21907012, 23252400, 31584066; Phenotypes: Epileptic encephalopathy, early infantile, 15, 615006: Mental retardation, autosomal recessive 12, 611090; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Undiagnosed metabolic disorders v1.368 STS Catherine Snow changed review comment from: Comment on list classification: Promoted from Amber to Green. This gene is associated with a relevant disease on OMIM and Gene2Phenotype and there is enough evidence to support a gene-disease association.

This gene was part of an initial gene list collated by Emma Ashton on behalf of the London North GLH, for GMS Metabolic Consensus Specialist Test Group. Additional information was not provided, such as mode of inheritance and phenotype.; to: Comment on list classification: Promoted from Amber to Green. This gene is associated with a relevant disease on OMIM and Gene2Phenotype and there is enough evidence to support a gene-disease association.
Undiagnosed metabolic disorders v1.364 DNM2 Sarah Leigh Added comment: Comment on list classification: This gene was added as Green due to the overall review and evidence assessment from the GMS mitochondrial specialist test group, submitted by Carl Fratter (May 2019) on behalf of GMS mitochondrial specialist test group: 1 case with multiple deletions and COX negative fibres; 5 cases presented in a poster with dominant DMN2 variants (had COX deficient muscle fibres, one case with the p.Arg369Trp revealed disruption of the dynamic mitochondrial network, https://doi.org/10.1016/j.nmd.2012.06.124). From panels: Possible mitochondrial disorder - nuclear genes (Version 0.187) and Mitochondrial DNA maintenance disorder (Version 0.8).
Undiagnosed metabolic disorders v1.357 FDX2 Sarah Leigh Added comment: Comment on list classification: Based on reviews from Carl Fratter and Zornitza Stark (below).
This gene was added as Green due to the overall review and evidence assessment from the GMS mitochondrial specialist test group, submitted by Carl Fratter (May 2019) on behalf of GMS mitochondrial specialist test group: 3 unrelated familties; iron sulfur pathway. From panel: Possible mitochondrial disorder - nuclear genes (Version 0.187).
Promoted from red to amber, based on the expert review by Zornitza Stark (Australian Genomics) and the literature. FDX2 is associated with a phenotype in OMIM and not Gene2Phenotype. PMID: 24281368 describes a patient born of consanguineous Jewish Moroccan patents with episodic mitochondrial myopathy without optic atrophy or reversible leukoencephalopathy. The authors identified a homozygous missense variant in this gene (M1L). PMID: 30010796 describes 6 patients from 2 apparently unrelated Brazilian familes from the same geographical region with episodic mitochondrial myopathy. All affected individuals had the same homozygous variant (P144L). No haplotype analysis was performed. As there are only 2 different variants reported in this gene and no haplotype analysis was performed in PMID: 30010796 it was decided that there is currently not enough evidence to promote this gene to green status.
Undiagnosed metabolic disorders v1.356 FDX2 Sarah Leigh gene: FDX2 was added
gene: FDX2 was added to Undiagnosed metabolic disorders. Sources: Literature
Mode of inheritance for gene: FDX2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: FDX2 were set to 24281368; 28803783; 30010796
Phenotypes for gene: FDX2 were set to Mitochondrial myopathy, episodic, with optic atrophy and reversible leukoencephalopathy 251900
Review for gene: FDX2 was set to GREEN
Added comment: Sources: Literature
Undiagnosed metabolic disorders v1.348 COQ7 Sarah Leigh gene: COQ7 was added
gene: COQ7 was added to Undiagnosed metabolic disorders. Sources: Literature
Mode of inheritance for gene: COQ7 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: COQ7 were set to 26084283; 28409910
Phenotypes for gene: COQ7 were set to ?Coenzyme Q10 deficiency, primary, 8 616733
Review for gene: COQ7 was set to GREEN
Added comment: This gene was added as Green due to the overall review and evidence assessment from the GMS mitochondrial specialist test group, submitted by Carl Fratter (May 2019) on behalf of GMS mitochondrial specialist test group: 3 unrelated individuals and functional studies. From panel: Possible mitochondrial disorder - nuclear genes (Version 0.187).
Sources: Literature
Undiagnosed metabolic disorders v1.347 TMEM126A Sarah Leigh Added comment: Comment on list classification: This gene was part of an initial gene list collated by Emma Ashton on behalf of the London North GLH, for GMS Metabolic Consensus Specialist Test Group. Additional information was not provided, such as mode of inheritance and phenotype.
Associated with the phenotype Optic atrophy 7 612989 in OMIM, but not associated with phenotype in Gen2Phen. At least 2 variants reported in unrelated cases.
The red rating is based on Helen Britain's opinion that, the phenotype of Optic atrophy 7 612989 will not present via a metabolic team. TMEM126A is green on the Optic neuropathy panel.
Undiagnosed metabolic disorders v1.344 PDK3 Sarah Leigh Added comment: Comment on list classification: This gene was part of an initial gene list collated by Emma Ashton on behalf of the London North GLH, for GMS Metabolic Consensus Specialist Test Group. Additional information was not provided, such as mode of inheritance and phenotype.
Associated with relevant phenotype in OMIM, but not associated with phenotype in Gen2Phen. At least 2 variants reported in at least three unrelated cases, together with functional studies.
Undiagnosed metabolic disorders v1.342 PDK1 Sarah Leigh changed review comment from: Comment on list classification: Not associated with phenotype in OMIM or in Gen2Phen. PDK1 is mentioned in the supplimentary material in PMID 27604308, however, no details of variants nor phenotypes are mentioned.; to: Comment on list classification: This gene was part of an initial gene list collated by Emma Ashton on behalf of the London North GLH, for GMS Metabolic Consensus Specialist Test Group. Additional information was not provided, such as mode of inheritance and phenotype.
Not associated with phenotype in OMIM or in Gen2Phen. PDK1 is mentioned in the supplimentary material in PMID 27604308, however, no details of variants nor phenotypes are mentioned.
Undiagnosed metabolic disorders v1.342 NDUFA12 Sarah Leigh changed review comment from: Comment on list classification: Amber review collated by Carl Fratter May 2019 on behalf of GMS mitochondrial specialist test group: One case with a single homozygous terminating variant, together with functional studies.; to: Comment on list classification: This gene was part of an initial gene list collated by Emma Ashton on behalf of the London North GLH, for GMS Metabolic Consensus Specialist Test Group. Additional information was not provided, such as mode of inheritance and phenotype.
Amber review collated by Carl Fratter May 2019 on behalf of GMS mitochondrial specialist test group: One case with a single homozygous terminating variant, together with functional studies.
Undiagnosed metabolic disorders v1.342 MRPS16 Sarah Leigh changed review comment from: Comment on list classification: Amber review collated by Carl Fratter May 2019 on behalf of GMS mitochondrial specialist test group: single homozygous terminating variant in two 'unrelated' cases, together with functional studies.; to: Comment on list classification: This gene was part of an initial gene list collated by Emma Ashton on behalf of the London North GLH, for GMS Metabolic Consensus Specialist Test Group. Additional information was not provided, such as mode of inheritance and phenotype.
Amber review collated by Carl Fratter May 2019 on behalf of GMS mitochondrial specialist test group: single homozygous terminating variant in two 'unrelated' cases, together with functional studies.
Undiagnosed metabolic disorders v1.342 COX4I2 Sarah Leigh changed review comment from: Comment on list classification: This gene should remain Amber due to the overall review and evidence assessment from the GMS mitochondrial specialist test group, submitted by Carl Fratter.
One homozygous variant (c.412G>A, p.E138K) reported in 5 Arab Muslim patients with exocrine pancreatic insufficiency, dyserythropoietic anemia, and calvarial hyperostosis (612714) (PMID 19268275) and heterozygous variant (c.253C>T, p.R85W) found together with a heterozygous COX10 variant (c.1096G>T, p.V366L)(PMID 22592081).; to: Comment on list classification: This gene was part of an initial gene list collated by Emma Ashton on behalf of the London North GLH, for GMS Metabolic Consensus Specialist Test Group. Additional information was not provided, such as mode of inheritance and phenotype.
This gene should remain Amber due to the overall review and evidence assessment from the GMS mitochondrial specialist test group, submitted by Carl Fratter.
One homozygous variant (c.412G>A, p.E138K) reported in 5 Arab Muslim patients with exocrine pancreatic insufficiency, dyserythropoietic anemia, and calvarial hyperostosis (612714) (PMID 19268275) and heterozygous variant (c.253C>T, p.R85W) found together with a heterozygous COX10 variant (c.1096G>T, p.V366L)(PMID 22592081).
Undiagnosed metabolic disorders v1.342 COA5 Sarah Leigh changed review comment from: Associated with phenotype in OMIM and as a possible G2P. At least 1 variant reported.; to: This gene was part of an initial gene list collated by Emma Ashton on behalf of the London North GLH, for GMS Metabolic Consensus Specialist Test Group. Additional information was not provided, such as mode of inheritance and phenotype. Associated with phenotype in OMIM and as a possible G2P. At least 1 variant reported.
Undiagnosed metabolic disorders v1.342 ATP5E Sarah Leigh changed review comment from: Comment on list classification: Updated information and Amber review collated by Carl Fratter May 2019 on behalf of GMS mitochondrial specialist test group: 1 reported case with functional studies.; to: Comment on list classification: This gene was part of an initial gene list collated by Emma Ashton on behalf of the London North GLH, for GMS Metabolic Consensus Specialist Test Group. Additional information was not provided, such as mode of inheritance and phenotype. Updated information and Amber review collated by Carl Fratter May 2019 on behalf of GMS mitochondrial specialist test group: 1 reported case with functional studies.
Undiagnosed metabolic disorders v1.342 ATP5A1 Sarah Leigh changed review comment from: Comment on list classification: Two variants together with functional studies. The Amber rating is based on the views of Anna de Burca (Genomics England Clinical Fellow) that the interpretation of PMID 23599390 that the boys in this publication have inherited a heterozygous variant from their father while not expressing the maternal allele due to unknown variant affecting expression.; to: Comment on list classification: This gene was part of an initial gene list collated by Emma Ashton on behalf of the London North GLH, for GMS Metabolic Consensus Specialist Test Group. Additional information was not provided, such as mode of inheritance and phenotype. The Amber rating is based on the views of Anna de Burca (Genomics England Clinical Fellow) that the interpretation of PMID 23599390 that the boys in this publication have inherited a heterozygous variant from their father while not expressing the maternal allele due to unknown variant affecting expression.
Undiagnosed metabolic disorders v1.335 NDUFA12 Sarah Leigh Added comment: Comment on list classification: Amber review collated by Carl Fratter May 2019 on behalf of GMS mitochondrial specialist test group: One case with a single homozygous terminating variant, together with functional studies.
Undiagnosed metabolic disorders v1.333 MRPS16 Sarah Leigh Added comment: Comment on list classification: Amber review collated by Carl Fratter May 2019 on behalf of GMS mitochondrial specialist test group: single homozygous terminating variant in two 'unrelated' cases, together with functional studies.
Undiagnosed metabolic disorders v1.326 COA5 Sarah Leigh Phenotypes for gene: COA5 were changed from Complex IV (Mitochondrial respiratory chain disorders (caused by nuclear variants only), OXPHOS assembly factors); ?Cardioencephalomyopathy, fatal infantile, due to cytochrome c oxidase deficiency 3 to ?Cardioencephalomyopathy, fatal infantile, due to cytochrome c oxidase deficiency 3 616500
Undiagnosed metabolic disorders v1.321 ATP5E Sarah Leigh Added comment: Comment on publications: pmid 27626380: knockout of the mouse homolog of human ATP5E is homozygous-lethal (defined as absence of homozygous mice after screening of at least 28 pups before weaning).
Undiagnosed metabolic disorders v1.320 ATP5E Sarah Leigh Added comment: Comment on list classification: Updated information and Amber review collated by Carl Fratter May 2019 on behalf of GMS mitochondrial specialist test group: 1 reported case with functional studies.
Undiagnosed metabolic disorders v1.309 SLC25A12 Ivone Leong Phenotypes for gene: SLC25A12 were changed from Disorders of mitochondrial solute import (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Inherited white matter disorders to Disorders of mitochondrial solute import (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Inherited white matter disorders; Epileptic encephalopathy, early infantile, 39 612949; Hypomyelination, global cerebral, 612949
Undiagnosed metabolic disorders v1.266 ALPL Sarah Leigh Added comment: Comment on list classification: Associated with relevant phenotype in OMIM and as confirmed Gen2Phen gene. At least 16 variants reported in hypophosphatasia, infantile 241500, some of these variants and others were found in childhood and adult Hypophosphatasia and two addtional variants were reported in a case of perinatal lethal hypophosphatasia (PMID 11745997).
Undiagnosed metabolic disorders v1.264 IER3IP1 Helen Brittain reviewed gene: IER3IP1: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Microcephaly, epilepsy, and diabetes syndrome, 614231; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Undiagnosed metabolic disorders v1.256 ADSL Sarah Leigh edited their review of gene: ADSL: Added comment: Associated with relevant phenotype in OMIM and as confirmed Gen2Phen gene. At least 8 variants reported associated with adenylosuccinase deficiency in at least 10 unrelated cases.; Changed rating: GREEN; Changed publications: 27604308, 18830228, 12016589, 10090474; Changed phenotypes: Adenylosuccinase deficiency 103050, Intellectual disability, Epileptic encephalopathy
Undiagnosed metabolic disorders v1.197 MRPL3 Sarah Leigh Added comment: Comment on list classification: This gene was rated as Green due to the overall review and evidence assessment from the GMS mitochondrial specialist test group, submitted by Carl Fratter (May 2019) on behalf of GMS mitochondrial specialist test group: 2 unrelated families (4 sibs + 1 unrelated case) and functional studies. From panel: Possible mitochondrial disorder - nuclear genes (Version 0.187).
Undiagnosed metabolic disorders v1.182 LIPC Sarah Leigh Added comment: Comment on list classification: This gene was part of an initial gene list collated by Emma Ashton on behalf of the London North GLH, for GMS Metabolic Consensus Specialist Test Group. Additional information was not provided, such as mode of inheritance and phenotype.
Associated with relevant phenotype in OMIM, but not associated with phenotype in Gen2Phen. At least 3 variants reported in two unrelated families with Hepatic lipase deficiency, 614025.
Undiagnosed metabolic disorders v1.150 GLUL Sarah Leigh Added comment: Comment on list classification: This gene was part of an initial gene list collated by Emma Ashton on behalf of the London North GLH, for GMS Metabolic Consensus Specialist Test Group. Additional information was not provided, such as mode of inheritance and phenotype.
Associated with relevant phenotype in OMIM and as confirmed Gen2Phen gene. At least 3 variants reported in unrelated cases.
Undiagnosed metabolic disorders v1.136 FGFR2 Sarah Leigh Added comment: Comment on list classification: Associated with 14 phenotypes in OMIM and as confirmed Gen2Phen gene for acrocephalosyndactyly type V, Antley-Bixler syndrome, Apert syndrome, Beare-Stevenson cutis gyrata syndrome, Crouzon syndrome, familial scaphocephaly syndrome, Jackson-Weiss syndrome, lacrimo-auriculo-dento-digital syndrome. At least 44 variants reported.
Undiagnosed metabolic disorders v1.135 FGFR2 Sarah Leigh Phenotypes for gene: FGFR2 were changed from Antley-Bixler syndrome type without disordered steroidogenesis; Arthrogryposis; Bilateral microtia; Choanal atresia; Craniosynostosis syndromes phenotypes; Deafness and congenital structural abnormalities; Unexplained skeletal dysplasia to Antley-Bixler syndrome without genital anomalies or disordered steroidogenesis 207410; Apert syndrome 101200; Beare-Stevenson cutis gyrata syndrome 123790; Bent bone dysplasia syndrome 614592; Craniofacial-skeletal-dermatologic dysplasia 101600; Craniosynostosis, nonspecific; Crouzon syndrome 123500; Gastric cancer, somatic 613659; Jackson-Weiss syndrome 123150; LADD syndrome 149730; Pfeiffer syndrome 101600; Saethre-Chotzen syndrome 101400; Scaphocephaly and Axenfeld-Rieger anomaly; Scaphocephaly, maxillary retrusion, and mental retardation 609579
Undiagnosed metabolic disorders v1.130 TANGO2 Sarah Leigh gene: TANGO2 was added
gene: TANGO2 was added to Undiagnosed metabolic disorders. Sources: Other
Mode of inheritance for gene: TANGO2 was set to BIALLELIC, autosomal or pseudoautosomal
Phenotypes for gene: TANGO2 were set to Metabolic encephalomyopathic crises, recurrent, with rhabdomyolysis, cardiac arrhythmias, and neurodegeneration 616878
Review for gene: TANGO2 was set to GREEN
Added comment: Sources: Other
Undiagnosed metabolic disorders v1.129 STAT2 Sarah Leigh Added comment: Comment on list classification: Based on recommendation of Helen Britain (Clinical Fellow, Genomics England), that the majority of cases will be presenting in the context of overwhelming infection. The raised lactate and encephalomyopathy are potentially relevant phenotypes for this panel, however more evidence is needed on how common this presentation is, and whether it is always clearly associated with a proven infection.
Undiagnosed metabolic disorders v1.127 IER3IP1 Sarah Leigh Added comment: Comment on list classification: Based on recommendation of Helen Britain (Clinical Fellow, Genomics England), that patients will present with features of microcephaly / neonatal diabetes / developmental delay, rather than metabolic disorder.
Undiagnosed metabolic disorders v1.126 IER3IP1 Sarah Leigh gene: IER3IP1 was added
gene: IER3IP1 was added to Undiagnosed metabolic disorders. Sources: Other
Mode of inheritance for gene: IER3IP1 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: IER3IP1 were set to 21835305; 22991235; 24138066
Phenotypes for gene: IER3IP1 were set to Microcephaly, epilepsy, and diabetes syndrome 614231
Review for gene: IER3IP1 was set to AMBER
Added comment: Sources: Other
Undiagnosed metabolic disorders v1.124 POLG2 Sarah Leigh Added comment: Comment on mode of inheritance: Reporting and characterization of a homozygous POLG2 variant in mitochondrial DNA depletion syndrome and in an autosomal recessive epilepsy family without ophthalmoplegia (PMID 27592148; 30157269; 31286721).
Undiagnosed metabolic disorders v1.106 UQCRQ Sarah Leigh Added comment: Comment on list classification: Amber review collated by Carl Fratter (May 2019) on behalf of GMS mitochondrial specialist test group: One variant reported in a consanguineous Israeli Bedouin kindred with Mitochondrial complex III deficiency, nuclear type 4 (615159)(PMID: 18439546).
Undiagnosed metabolic disorders v1.90 RRM2B Rebecca Foulger Phenotypes for gene: RRM2B were changed from Required for mtDNA maintenance (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Mitochondrial Ribonucelotide Reductase subunit 2 deficiency (Disorders of purine metabolism); Disorders of mitochondrial DNA maintenance and integrity; Mitochondrial DNA depletion syndrome 8A (encephalomyopathic type with renal tubulopathy), 612075; Progressive external ophthalmoplegia with mitochondrial DNA deletions (autosomal dominant); 5,613077Mitochondrial DNA depletion syndrome 8B (MNGIE type), 612075; Mitochondrial DNA Depletion Syndrome (recessive) to Required for mtDNA maintenance (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Mitochondrial Ribonucelotide Reductase subunit 2 deficiency (Disorders of purine metabolism); Disorders of mitochondrial DNA maintenance and integrity; Mitochondrial DNA depletion syndrome 8A (encephalomyopathic type with renal tubulopathy), 612075; Progressive external ophthalmoplegia with mitochondrial DNA deletions, autosomal dominant 5, 613077; Mitochondrial DNA depletion syndrome 8B (MNGIE type), 612075; Mitochondrial DNA Depletion Syndrome (recessive)
Undiagnosed metabolic disorders v1.88 TWNK Rebecca Foulger Phenotypes for gene: TWNK were changed from Required for mtDNA maintenance (Mitochondrial respiratory chain disorders (caused by nuclear variants only)) ; Disorders of mitochondrial DNA maintenance and integrity; Progressive external ophthalmoplegia, autosomal dominant, 3, 609286Mitochondrial DNA depletion syndrome 7 (hepatocerebral type), 271245; Mitochondrial DNA Depletion Syndrome; Progressive External Ophthalmoplegia with Mitochondrial DNA Deletions (monoallelic); Mitochondrial Membrane Protein-Associated Neurodegeneration (biallelic); Mitochondrial DNA Depletion Syndrome (biallelic) to Required for mtDNA maintenance (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Disorders of mitochondrial DNA maintenance and integrity; Progressive external ophthalmoplegia, autosomal dominant, 3, 609286; Mitochondrial DNA depletion syndrome 7 (hepatocerebral type), 271245; Mitochondrial DNA Depletion Syndrome; Progressive External Ophthalmoplegia with Mitochondrial DNA Deletions (monoallelic); Mitochondrial Membrane Protein-Associated Neurodegeneration (biallelic); Mitochondrial DNA Depletion Syndrome (biallelic)
Undiagnosed metabolic disorders v1.87 SLC25A4 Rebecca Foulger Phenotypes for gene: SLC25A4 were changed from Required for mtDNA maintenance (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Disorders of mitochondrial DNA maintenance and integrity; Disorders of mitochondrial protein transport; Progressive external ophthalmoplegia with mitochondrial DNA deletions 3, 609283Mitochondrial DNA depletion syndrome 12 (cardiomyopathic type), 615418; Progressive External Ophthalmoplegia with Mitochondrial DNADeletions to Required for mtDNA maintenance (Mitochondrial respiratory chain disorders (caused by nuclear variants only)); Disorders of mitochondrial DNA maintenance and integrity; Disorders of mitochondrial protein transport; Progressive external ophthalmoplegia with mitochondrial DNA deletions 3, 609283; Mitochondrial DNA depletion syndrome 12 (cardiomyopathic type), 615418; Progressive External Ophthalmoplegia with Mitochondrial DNADeletions
Undiagnosed metabolic disorders v1.86 SCO2 Rebecca Foulger Phenotypes for gene: SCO2 were changed from Complex IV (Mitochondrial respiratory chain disorders (caused by nuclear variants only), OXPHOS assembly factors); Isolated complex IV deficiency; Cardioencephalomyopathy, fatal infantile, due to cytochrome c oxidase deficiency 1, 604377Myopia 6, 608908; Mitochondrial Diseases; Mitochondrial Respiratory Chain Complex IV Deficiency to Complex IV (Mitochondrial respiratory chain disorders (caused by nuclear variants only), OXPHOS assembly factors); Isolated complex IV deficiency; Cardioencephalomyopathy, fatal infantile, due to cytochrome c oxidase deficiency 1, 604377; Myopia 6, 608908; Mitochondrial Diseases; Mitochondrial Respiratory Chain Complex IV Deficiency
Undiagnosed metabolic disorders v1.82 RPIA Sarah Leigh commented on gene: RPIA: Review by Konstantinos Varvagiannis for the Genetic Epilepsy syndromes panel. 9 Dec 2018, 1:44 a.m.
Panel version: 0.1488
Biallelic pathogenic variants in RPIA cause Ribose 5-phosphate isomerase deficiency, MIM 608611. PMID: 14988808 is the first report on the disorder with molecular (incl. genetic) confirmation of the diagnosis. A patient initially investigated for early developmental delay, leukoencephalopathy, seizures with onset at 4 years, with subsequent neurologic regression and peripheral neuropathy at the age of 7, was suspected to have a disorder of the pentose phosphate pathway on the basis of highly elevated polyols on brain MRS and body fluid analysis. Reduced ribose 5-phosphate isomerase activity was shown in fibroblasts. Genetic testing demonstrated the presence of a missense (NM_144563.2:c.404C>T or p.Ala135Val - previously referred to as A61V) as well as a frameshift variant (NM_144563.2:c.762delG or p.Asn255Ilefs). Additional extensive supportive functional studies were published a few years later (PMID: 20499043). [This patient was initially described in PMID: 10589548]. PMID: 28801340 is a report on a second patient. This individual presented with delayed early development (independent walking and speech achieved at 2 and 5 years respectively), seizures and regression at the age of 7 with MRI white matter abnormalities. Review of magnetic resonance spectroscopy (MRS) was suggestive of elevated polyols (arabitol and ribitol). In line with this, genetic testing revealed a homozygous missense variant in RPIA (NM_144563.2:c.592T>C or p.Phe198Leu). Urine analysis confirmed elevated excretion of polyols, thus confirming the diagnosis. PMID: 30088433 reports on a boy with neonatal onset leukoencephalopathy and developmental delay having undergone early metabolic testing and aCGH (the latter at the age of 16 months). Persistance of his delay motivated exome sequencing at the age of approx. 4.5 years which demonstrated 2 RPIA variants (NM_144563.2:c.253G>A or p.Ala85Thr and NM_144563.2:c.347-1G>A). Measurement of ribitol and arabitol in urine demonstrated significant elevations (>20x) consistent with this diagnosis. 2 of the 3 patients described in the literature presented seizures. As a result this gene can be considered for inclusion in this panel as amber. [This gene is also present in the Undiagnosed metabolic disorders gene panel as red. Please consider upgrade based on these further publications.]. Sources: Literature
Undiagnosed metabolic disorders HAL Sarah Leigh reviewed HAL