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Severe Paediatric Disorders

Gene: TUBB2A

Green List (high evidence)

TUBB2A (tubulin beta 2A class IIa)
EnsemblGeneIds (GRCh38): ENSG00000137267
EnsemblGeneIds (GRCh37): ENSG00000137267
OMIM: 615101, Gene2Phenotype
TUBB2A is in 8 panels

2 reviews

Arina Puzriakova (Genomics England Curator)

Green List (high evidence)

Associated with Cortical dysplasia, complex, with other brain malformations 5 in OMIM and G2P (confirmed).

PMID: 32571897 (2020) - 12 patients with eight novel and one recurrent variants in the TUBB2A gene. Phenotypic features included seizures (11/12), intellectual disability (12/12), speech impairment (12/12), severe motor developmental delay (11/12) with 4 patients being non-ambulatory.

A spectrum of brain malformations was reported in 11/12 participants, including tubulinopathy-related dysgyria of varying severity (7/12), abnormal corpus callosum (8/12), enlarged lateral ventricles (8/12), and dysmorphic basal ganglia (4/12). Four patients had mild hypoplasia of the cerebellar vermis and/or a dysmorphic vermis; the cerebellar hemispheres were hypoplastic in one patient. However, none exhibited any cerebellar signs or had any progressive cerebellar atrophy.
Created: 30 Jul 2020, 3:27 p.m. | Last Modified: 30 Jul 2020, 3:27 p.m.
Panel Version: 1.10

Mode of inheritance
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted

Phenotypes
Cortical dysplasia, complex, with other brain malformations 5, 615763

Publications

Louise Daugherty (Genomics England Curator)

I don't know

Initial gene list (NGC_genelist-20190823_GREEN_dis_moi_forCuration_20200211.xlsx) collated by Dr Courtney French (University of Cambridge University Hospital NHS Foundation), Dr Karyn Megy (Clinical Feedback Lead, NIHR BioResource - Rare Diseases Study, University of Cambridge University Hospital NHS Foundation), Dr Alba Sanchis-Juan (NIHR BioResource - Rare Diseases Study, University of Cambridge University Hospital NHS Foundation) and Lucy Raymond (Professor of Medical Genetics and Neurodevelopment, University of Cambridge University Hospital NHS Foundation). Submitted to the PanelApp resource January 2020 on behalf of the Next Generation Children Project, Addenbrookes' Hospital, Cambridge. Gene Symbol submitted: TUBB2A; Recommended initial gene rating: Green List (high evidence); Phenotypes: Cortical dysplasia, complex, with other brain malformations 5, 615763 (3); Mode of inheritance: Autosomal dominant
Created: 20 Feb 2020, 5:27 p.m. | Last Modified: 20 Feb 2020, 5:27 p.m.
Panel Version: 0.12

Details