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Brain channelopathy v1.82 SPR Arina Puzriakova Added comment: Comment on mode of inheritance: Sepiapterin reductase deficiency typically follows an autosomal recessive pattern of inheritance. Two cases with different heterozygous variants have been reported (PMID: 29147684, 15241655) although with reduced penetrance in the familial cases and mild form of the disorder in the singleton.

Overall additional evidence is required to conclusively make an association with monoallelic variants and therefore updating the MOI from 'Both mono- and biallelic' to 'Biallelic'
Brain channelopathy v1.82 SPR Arina Puzriakova Mode of inheritance for gene: SPR was changed from BOTH monoallelic and biallelic, autosomal or pseudoautosomal to BIALLELIC, autosomal or pseudoautosomal
Brain channelopathy v1.81 SPR Arina Puzriakova Phenotypes for gene: SPR were changed from Dystonia, dopa-responsive, due to sepiapterin reductase deficiency 612716 to Dystonia, dopa-responsive, due to sepiapterin reductase deficiency, OMIM:612716
Brain channelopathy v1.33 SPR Sarah Leigh Classified gene: SPR as Green List (high evidence)
Brain channelopathy v1.33 SPR Sarah Leigh Added comment: Comment on list classification: Recommedation from Arianna Tucci to add SPR to this panel
Brain channelopathy v1.33 SPR Sarah Leigh Gene: spr has been classified as Green List (High Evidence).
Brain channelopathy v1.32 SPR Sarah Leigh gene: SPR was added
gene: SPR was added to Brain channelopathy. Sources: Literature
Mode of inheritance for gene: SPR was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Phenotypes for gene: SPR were set to Dystonia, dopa-responsive, due to sepiapterin reductase deficiency 612716
Review for gene: SPR was set to GREEN
Added comment: According to the recommendations of Arianna Tucci (Genomics England Clinical Fellow), the phenotypes associated with variants in SPR are not associated with epileptic seizures, rather with myoclonic movements as reported in the following publications: PMID 16650784: myoclonic jerks sometimes observed; PMID 21431957: myoclonic movements of hands and face; PMID 28189489 sudden stiffening of the whole body, extension of all extremities, and upward gaze lasting for several minutes often after meals in a 3 month old boy (including during a hospital stay), initially, mistaken for seizures, however 24h video-EEG showed no epileptiform discharges or any EEG correlate. Therefore this phenotype is relevant to the Brain channelopathy panel.
Sources: Literature