Possible mitochondrial disorder - nuclear genes
Gene: LETM1EnsemblGeneIds (GRCh38): ENSG00000168924
EnsemblGeneIds (GRCh37): ENSG00000168924
OMIM: 604407, Gene2Phenotype
LETM1 is in 14 panels
3 reviews
Achchuthan Shanmugasundram (Genomics England Curator)
The rating of this gene has been updated to green following NHS Genomic Medicine Service approval.Created: 4 Dec 2024, 11:42 a.m. | Last Modified: 4 Dec 2024, 11:42 a.m.
Panel Version: 3.113
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Sarah Leigh (Genomics England Curator)
LETM1 variants have been associated with Neurodegeneration, childhood-onset, with multisystem involvement due to mitochondrial dysfunction, OMIM:620089 and as moderate Gen2Phen gene for LETM1-related neurodevelopmental disorder.
PMID: 36055214 reports 10 LETM1 variants in 18 patients from 11 unrelated families with childhood-onset neurodegeneration with multisystem involvement, many of whom were gathered using the GeneMatcher Program. The most common clinical features of this cohort, where an assessment could be made, were: mitochondrial respiratory complex deficiencies 11/11 (100%), global developmental delay / intellectual disability 17/18 (94%), bilateral sensorineural hearing loss 11/14 (78%) , impaired vision 10/10 (100%), cerebellar ataxia 7/9 (78%), seizures 10/15 (67%), hypotonia 11/18 (61%) (PMID: 36055214, figure 1c).Created: 3 Aug 2023, 10:07 a.m. | Last Modified: 8 Aug 2023, 10:16 a.m.
Panel Version: 3.42
Comment on list classification: There is enough evidence for this gene to be rated GREEN at the next major review.Created: 3 Aug 2023, 9:16 a.m. | Last Modified: 3 Aug 2023, 9:16 a.m.
Panel Version: 3.41
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Carl Fratter (Oxford University Hospitals NHS Trust)
Consensus opinion from the 3 NHSE GMS specialist mitochondrial providers.
Sources: Expert ReviewCreated: 31 Jul 2023, 10:08 a.m.
Mode of inheritance
BIALLELIC, autosomal or pseudoautosomal
Phenotypes
620089 Neurodegeneration, childhood-onset, with multisystem involvement due to mitochondrial dysfunction
Details
- Mode of Inheritance
- BIALLELIC, autosomal or pseudoautosomal
- Sources
-
- NHS GMS
- Expert Review Green
- Phenotypes
-
- Neurodegeneration, childhood-onset, with multisystem involvement due to mitochondrial dysfunction, OMIM:620089
- OMIM
- 604407
- Clinvar variants
- Variants in LETM1
- Penetrance
- None
- Publications
- Panels with this gene
-
- Bilateral congenital or childhood onset cataracts
- Childhood onset hereditary spastic paraplegia
- Likely inborn error of metabolism
- Laterality disorders and isomerism
- Ataxia and cerebellar anomalies - narrow panel
- Mitochondrial disorders
- Early onset or syndromic epilepsy
- Possible mitochondrial disorder - nuclear genes
- DDG2P
- Congenital myopathy
- Paediatric or syndromic cardiomyopathy
- Optic neuropathy
- Monogenic hearing loss
- Intellectual disability
History Filter Activity
Removed Tag, Removed Tag
Achchuthan Shanmugasundram (Genomics England Curator)Tag Q3_23_promote_green was removed from gene: LETM1. Tag Q3_23_NHS_review was removed from gene: LETM1.
Added New Source, Added New Source, Status Update
Achchuthan Shanmugasundram (Genomics England Curator)Source Expert Review Green was added to LETM1. Source NHS GMS was added to LETM1. Rating Changed from Amber List (moderate evidence) to Green List (high evidence)
Removed Tag
Achchuthan Shanmugasundram (Genomics England Curator)Tag Q3_23_MOI was removed from gene: LETM1.
Added Tag
Sarah Leigh (Genomics England Curator)Tag Q3_23_NHS_review tag was added to gene: LETM1.
Added Tag, Added Tag
Sarah Leigh (Genomics England Curator)Tag Q3_23_promote_green tag was added to gene: LETM1. Tag Q3_23_MOI tag was added to gene: LETM1.
Entity classified by Genomics England curator
Sarah Leigh (Genomics England Curator)Gene: letm1 has been classified as Amber List (Moderate Evidence).
Set publications
Sarah Leigh (Genomics England Curator)Publications for gene: LETM1 were set to
Set Phenotypes
Sarah Leigh (Genomics England Curator)Phenotypes for gene: LETM1 were changed from 620089 Neurodegeneration, childhood-onset, with multisystem involvement due to mitochondrial dysfunction to Neurodegeneration, childhood-onset, with multisystem involvement due to mitochondrial dysfunction, OMIM:620089
Created, Added New Source, Set mode of inheritance, Set Phenotypes
Carl Fratter (Oxford University Hospitals NHS Trust)gene: LETM1 was added gene: LETM1 was added to Possible mitochondrial disorder - nuclear genes. Sources: Expert Review Mode of inheritance for gene: LETM1 was set to BIALLELIC, autosomal or pseudoautosomal Phenotypes for gene: LETM1 were set to 620089 Neurodegeneration, childhood-onset, with multisystem involvement due to mitochondrial dysfunction Review for gene: LETM1 was set to GREEN