Congenital muscular dystrophy and congenital myopathy
Gene: BET1
The rating of this gene has been updated to Green and the mode of inheritance set to 'BIALLELIC, autosomal or pseudoautosomal' following NHS Genomic Medicine Service approval.Created: 2 May 2024, 3:45 p.m. | Last Modified: 2 May 2024, 3:45 p.m.
Panel Version: 0.229
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Anna Sarkozy (Great Ormond Street Hospital) reviewing this gene on the old GMS Congenital muscular dystrophy panel on 24 Mar 2023 notes (rated Green): 'this gene should be included as green gene given recent publications on biallelic variants in patients from 2 unrelated families presenting with severe congenital muscular dystrophy and epilepsy. the BET1 gene variants result in low BET1 protein levels and impaired ER‐to‐Golgi transport.'
Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal
Phenotypes: congenital muscular dystrophy with epilepsy
Publications: PMID: 34779586
Mode of pathogenicity: OtherCreated: 21 Dec 2023, 8:13 p.m. | Last Modified: 21 Dec 2023, 8:13 p.m.
Panel Version: 0.197
Comment on classification of this gene: As reviewed by Dmitrijs Rots, the rating for this gene should be GREEN. This gene has been implicated in congenital muscular dystrophy, as identified from biallelic variants from two unrelated cases and supported by results from functional studies.
Three individuals from two unrelated families were identified with biallelic variants in BET1. Out of these, family 1 with only one patient harboured compound heterozygous variants (c.202G>C/ p.Asp68His & c.134delC/ p.Ala45ValfsTer2) and family 2 with two patients harboured homozygous variant (c.152T>G/ p.Ile51Ser). All three patients were reported with severe congenital muscular dystrophy and individual with compound heterozygous variants was reported with epilepsy.
Functional studies showed that the missense variant (p.Asp68His) acts as a complex splice variant and causes a reduction of BET1 protein in patient cells with impaired vesicular traffic. Analysis of cells from the second patient with the p.Ile51Ser missense variant identified normal levels of BET1 protein. ERGIC‐53 was identified as a novel interaction partner of BET1 and p.Ile51Ser BET1 missense protein resulted in impaired interaction with ERGIC‐53.
BET1 has not yet been associated with congenital muscular dystrophy in OMIM or in Gene2Phenotype and the publication describing this association was from the last year.Created: 12 Dec 2022, 5:06 p.m. | Last Modified: 12 Dec 2022, 5:06 p.m.
Panel Version: 3.1
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Phenotypes
Congenital muscular dystrophy, MONDO:0019950
Publications
3 reported individuals from two families with biallelic variants and functional data supporting the role of the variants in the phenotype.Created: 7 Dec 2021, 1:43 p.m. | Last Modified: 7 Dec 2021, 1:43 p.m.
Panel Version: 2.21
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Phenotypes
Congenital muscular dystrophy; epilepsy
Publications
Initial gene list (Congenital Muscular Dystrophy Gene Panel 207-London South GLH.xlsx) collated by Rachael Mein, Viapath Guy's Hospital February 2019 on behalf of London South GLH for the GMS Neurology specialist test group.Created: 29 Apr 2019, 3:37 p.m.
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Phenotypes
Congenital muscular dystrophy with epilepsy
Tag Q4_22_promote_green was removed from gene: BET1. Tag Q1_23_NHS_review was removed from gene: BET1.
Source Expert Review Green was added to BET1. Rating Changed from Amber List (moderate evidence) to Green List (high evidence)
Tag Q1_23_NHS_review tag was added to gene: BET1.
gene: BET1 was added gene: BET1 was added to Congenital muscular dystrophy and congenital myopathy. Sources: NHS GMS,Expert Review Amber,London South GLH Q4_22_promote_green tags were added to gene: BET1. Mode of inheritance for gene: BET1 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: BET1 were set to 34779586 Phenotypes for gene: BET1 were set to Congenital muscular dystrophy, MONDO:0019950