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Early onset or syndromic epilepsy v1.191 TUBB4A Rebecca Foulger Source Wessex and West Midlands GLH was added to TUBB4A.
Early onset or syndromic epilepsy v1.190 TUBB4A Rebecca Foulger Source NHS GMS was added to TUBB4A.
Early onset or syndromic epilepsy v1.189 TUBB4A Rebecca Foulger reviewed gene: TUBB4A: Rating: AMBER; Mode of pathogenicity: ; Publications: ; Phenotypes: ; Mode of inheritance:
Early onset or syndromic epilepsy v1.188 TUBB4A Tracy Lester reviewed gene: TUBB4A: Rating: GREEN; Mode of pathogenicity: ; Publications: 25168210; Phenotypes: Dystonia 4 torsion autosomal dominant, 128101, Leukodystrophy hypomyelinating 6, 612438; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Early onset or syndromic epilepsy v0.972 UFM1 Konstantinos Varvagiannis gene: UFM1 was added
gene: UFM1 was added to Genetic epilepsy syndromes. Sources: Literature,Expert Review
Mode of inheritance for gene: UFM1 was set to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Publications for gene: UFM1 were set to 28931644; 29868776
Phenotypes for gene: UFM1 were set to Leukodystrophy hypomyelinating 14, 617899
Penetrance for gene: UFM1 were set to Complete
Review for gene: UFM1 was set to GREEN
Added comment: Biallelic UFM1 mutations cause Leukodystrophy hypomyelinating 14, MIM 617899.

PMID: 28931644 is the first report on 16 individuals from 14 families with shared Roma ethnic background. All subjects were found to harbor a UFM1 promoter 3 basepair deletion in the homozygous state.

All patients demonstrated a severe phenotype including lack of development and severe epileptic encephalopathy while their MRI images demonstrated hypomyelination with atrophy of the basal ganglia and the cerebellum.

The promoter deletion was detected by exome sequencing. Previously a 0.8 Mb homozygous region (encompassing UFM1) was identified to be shared by all the patients in whom a SNP array was performed. Alternative causes, notably TUBB4A mutations and deletions/duplications were excluded. 3 individuals had Sanger sequencing of all coding regions within the homozygous interval to rule out other - eventually missed - variants.

PMID: 29868776 reports 4 additional individuals from 2 consanguineous families (one from Ethiopia, for the other this was not specified). All 4 patients were homozygous for the c.241C>T (NM_016617.3) or p.(Arg81Cys) variant which was shown to be hypomorphic upon functional studies.

The phenotype consisted of developmental delay (4/4 or 20/20 including the patients from the previous report with which comparison is made in table 2 of the article) with microcephaly (4/4 or 20/20) and seizures (4/4 or 16/20) as well as MRI abnormalities. Failure to thrive and/or short stature were also among the most common features.

UFM1 (as well as UFC1 also discussed in the same article) participate in ufmylation, with mutations in other enzymes of the same process (notably UBA5 - gene rated Green in the ID and epilepsy panels) having already been described in neurodevelopmental disorders.

As a result, this gene can be considered for inclusion in this panel as green (or amber).
Sources: Literature, Expert Review
Early onset or syndromic epilepsy v0.475 TUBB4A Sarah Leigh Marked gene: TUBB4A as ready
Early onset or syndromic epilepsy v0.475 TUBB4A Sarah Leigh Added comment: Comment when marking as ready: Associated with relevant phenotype in OMIM and as confirmed Gen2Phen gene. At least 6 variants reported in numerous cases.
Early onset or syndromic epilepsy v0.475 TUBB4A Sarah Leigh Gene: tubb4a has been classified as Green List (High Evidence).
Early onset or syndromic epilepsy v0.475 TUBB4A Sarah Leigh Classified gene: TUBB4A as Green List (high evidence)
Early onset or syndromic epilepsy v0.475 TUBB4A Sarah Leigh Gene: tubb4a has been classified as Green List (High Evidence).
Early onset or syndromic epilepsy TUBB4A Zornitza Stark reviewed gene: TUBB4A
Early onset or syndromic epilepsy TUBB4A Sarah Leigh Added gene to panel