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Childhood onset dystonia, chorea or related movement disorder v3.38 L2HGDH Achchuthan Shanmugasundram changed review comment from: PMID:15824270 - A 15 year-old boy with L-2-hydroxyglutaric aciduria was reported with early infantile-onset progressive psychomotor regression, mild choreodystonia affecting the distal part of the upper limbs, pyramidal signs, and epilepsy.

PMID:18780161 - Of seven patients from three unrelated Tunisian families with L-2-hydroxyglutaric aciduria and with homozygous variants in L2HGDH gene, three patients from two different families had dystonia.

PMID:24753671 - Two siblings were reported with dystonia diagnosed by classical neuroimaging findings with elevated urinary 2 hydroxyglutaric acid.; to: PMID:15824270 - A 15 year-old boy with L-2-hydroxyglutaric aciduria was reported with early infantile-onset progressive psychomotor regression, mild choreodystonia affecting the distal part of the upper limbs, pyramidal signs, and epilepsy.

PMID:18780161 - Of seven patients from three unrelated Tunisian families with L-2-hydroxyglutaric aciduria and with homozygous variants in L2HGDH gene, three patients from two different families had dystonia. The age of onset of the disorder in these patients is around six years.

PMID:24753671 - Two siblings (13 and 16 years of age with disease onset at 10 years of age) were reported with dystonia diagnosed by classical neuroimaging findings with elevated urinary 2 hydroxyglutaric acid.
Childhood onset dystonia, chorea or related movement disorder v3.33 SLC18A2 Achchuthan Shanmugasundram changed review comment from: PMID:23363473 - Eight children from an extended consanguineous Saudi Arabian family had a complex neurological disorder apparent since infancy. This disorder is characterised by abnormal movements, including parkinsonism, dystonia, and poor fine motor skills, as well as autonomic dysfunction, including abnormal sweating, cold extremities, and poor sleep. They were identified with a homozygous SLC18A2 variant (p.Pro387Leu). Functional evaluation showed that protein harbouring this variant has dramatically reduced activity than wild type protein, suggesting severe, but not complete loss of function as mechanism of action.

PMID:26497564 - Two male siblings from a consanguineous fancy was reported with a disorder comprising truncal hypotonia, a general paucity of movements, extrapyramidal signs and cognitive delay. They were identified with a homozygous SLC18A2 variant (p.Pro237His).; to: PMID:23363473 - Eight children from an extended consanguineous Saudi Arabian family had a complex neurological disorder apparent since infancy. This disorder is characterised by abnormal movements, including parkinsonism, dystonia, and poor fine motor skills, as well as autonomic dysfunction, including abnormal sweating, cold extremities, and poor sleep. They were identified with a homozygous SLC18A2 variant (p.Pro387Leu). Functional evaluation showed that protein harbouring this variant has dramatically reduced activity than wild type protein, suggesting severe, but not complete loss of function as mechanism of action.

PMID:26497564 - Two male siblings from a consanguineous family was reported with a disorder comprising truncal hypotonia, a general paucity of movements, extrapyramidal signs and cognitive delay. They were identified with a homozygous SLC18A2 variant (p.Pro237His).

PMID:31240161 - A child from a consanguineous family presented with hypotonia, mental disability, epilepsy, uncontrolled movements, and gastrointestinal problems and was identified with a homozygous SLC18A2 variant (p.Pro316Ala).

PMID:34078222 - A 6-month-old male infant who presented with developmental delay and suspected cerebral palsy was also diagnosed with infantile parkinsonism-dystonia-2 and was identified with the homozygous variant (p.Pro237His) reported in PMID:26497564.

This gene has been associated with relevant phenotypes in OMIM (PMID:618049), but not in Gene2Phenotype.
Childhood onset dystonia, chorea or related movement disorder v3.33 SLC18A2 Achchuthan Shanmugasundram commented on gene: SLC18A2: PMID:23363473 - Eight children from an extended consanguineous Saudi Arabian family had a complex neurological disorder apparent since infancy. This disorder is characterised by abnormal movements, including parkinsonism, dystonia, and poor fine motor skills, as well as autonomic dysfunction, including abnormal sweating, cold extremities, and poor sleep. They were identified with a homozygous SLC18A2 variant (p.Pro387Leu). Functional evaluation showed that protein harbouring this variant has dramatically reduced activity than wild type protein, suggesting severe, but not complete loss of function as mechanism of action.

PMID:26497564 - Two male siblings from a consanguineous fancy was reported with a disorder comprising truncal hypotonia, a general paucity of movements, extrapyramidal signs and cognitive delay. They were identified with a homozygous SLC18A2 variant (p.Pro237His).
Childhood onset dystonia, chorea or related movement disorder v1.210 ATP5G3 Zornitza Stark gene: ATP5G3 was added
gene: ATP5G3 was added to Childhood onset dystonia or chorea or related movement disorder. Sources: Literature
Mode of inheritance for gene: ATP5G3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: ATP5G3 were set to 34636445; 34954817
Phenotypes for gene: ATP5G3 were set to Dystonia, early-onset, and/or spastic paraplegia, MIM# 619681
Review for gene: ATP5G3 was set to GREEN
Added comment: Note that HGNC approved gene name is ATP5MC3.

PMID: 34636445 reports a missense variant identified in a large single-family pedigree with dystonia and spastic paraplegia. The variant was identified via exome sequencing of the proband and a distant cousin, focussing on variants within the previously determined linkage region. The identical missense variant was also identified in a patient with childhood onset dystonic syndrome and was shown to be de novo. Functional studies of fibroblast cell lines from affected father (HSP) and proband of large family demonstrated decreased complex V function. A drosophila model containing the missense variant had reduced mobility and reduced complex V activity.

PMID: 34954817 reports de novo monoallelic missense variants in three individuals, however one of these individuals was reported in above paper. The other two patients were: (1) a-15-year-old girl with milestone delay, pyramidal signs, and generalized dystonia with prominent upper-body involvement, and (2) a 6-year-old boy with delayed psychomotor development, lower-extremity spasticity, and elevated blood lactate levels
Sources: Literature
Childhood onset dystonia, chorea or related movement disorder v1.155 IMPDH2 Arina Puzriakova Added comment: Comment on list classification: This gene is not yet associated with a relevant phenotype in OMIM or G2P, but there are sufficient unrelated cases (3) presenting with signs of dystonia to rate as Green at the next GMS review. Other cases reported with motor dysfunction, and it is plausible that this may develop into dystonia later in life.
Childhood onset dystonia, chorea or related movement disorder v0.0 GNS Ellen McDonagh gene: GNS was added
gene: GNS was added to Childhood onset dystonia or chorea or related movement disorder. Sources: London North GLH,Expert Review Red
Mode of inheritance for gene: GNS was set to