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Mendeliome v1.1861 TUBA4A Bryony Thompson Classified gene: TUBA4A as Green List (high evidence)
Mendeliome v1.1861 TUBA4A Bryony Thompson Gene: tuba4a has been classified as Green List (High Evidence).
Mendeliome v1.1860 TUBA4A Bryony Thompson reviewed gene: TUBA4A: Rating: GREEN; Mode of pathogenicity: None; Publications: 38884572, 37418012; Phenotypes: Hereditary ataxia MONDO:0100309, TUBA4A-related; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Mendeliome v1.1585 TUBA4A Seb Lunke Marked gene: TUBA4A as ready
Mendeliome v1.1585 TUBA4A Seb Lunke Gene: tuba4a has been classified as Amber List (Moderate Evidence).
Mendeliome v1.1585 TUBA4A Seb Lunke Classified gene: TUBA4A as Amber List (moderate evidence)
Mendeliome v1.1585 TUBA4A Seb Lunke Gene: tuba4a has been classified as Amber List (Moderate Evidence).
Mendeliome v1.1581 TUBA4A Sarah Pantaleo gene: TUBA4A was added
gene: TUBA4A was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: TUBA4A was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: TUBA4A were set to PMID: 38413182
Phenotypes for gene: TUBA4A were set to Congenital myopathy MONDO:0019952
Review for gene: TUBA4A was set to AMBER
Added comment: One novel TUBA4A variant in two unrelated Chinese patients with sporadic congenital myopathy.

Identified candidate genes using laser capture micro dissection, proteomics, WES, clinical data, myopathological changes, electrophysiological exams and thigh muscle MRIs.

The variant is de novo in both patients, c.679C>T, p.(Leu227Phe). The prominent myopathological changes in both patients were muscle fibres with focal myofibrillar disorganisation and rimmed vacuoles. Immunofluorescence showed ubiqution-positive TUBA4A protein aggregates in the muscle fibres with rimmed vacuoles. Overexpression of Leu227Phe resulted in cytoplasmic aggregates which colocalised with ubiquitin in cellular model.

Patient 1 is 14yo and had delayed motor development milestones since infancy. Myopathic face, high-arched palate, waddling gait, winged scapula and muscle weakness in four limbs with lower extremities and proximal muscle more severely affected. Follow up at 14yo showed slight improvement in motor function compared with 3yo.

Patient 2 is 6yo and presented with motor retardation since birth. At 3yo, presented with mild ptosis and ophthalmoparesis, high-arched palate and muscle weakness involving both proximal and distal in all limbs.

No likely pathogenic variants in 116 other protein-encoding genes. Variants confirmed by Sanger sequencing and absent from gnomAD. ACMG predicts likely pathogenic classification.
Sources: Literature