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Genetic Epilepsy v0.1857 UNC79 Zornitza Stark Phenotypes for gene: UNC79 were changed from Neurodevelopmental disorder (MONDO:0700092), UNC70-related to Neurodevelopmental disorder (MONDO:0700092), UNC79-related
Genetic Epilepsy v0.1856 UNC79 Elena Savva Phenotypes for gene: UNC79 were changed from Neurodevelopmental disorder (MONDO:0700092), UNC70-related to Neurodevelopmental disorder (MONDO:0700092), UNC70-related
Genetic Epilepsy v0.1856 UNC79 Elena Savva Phenotypes for gene: UNC79 were changed from Neurodevelopmental disorder (MONDO:0700092), UNC70-related to Neurodevelopmental disorder (MONDO:0700092), UNC70-related
Genetic Epilepsy v0.1856 UNC79 Elena Savva Phenotypes for gene: UNC79 were changed from Neurodevelopmental disorder (MONDO:0700092), UNC70-related to Neurodevelopmental disorder (MONDO:0700092), UNC70-related
Genetic Epilepsy v0.1855 UNC79 Elena Savva Classified gene: UNC79 as Green List (high evidence)
Genetic Epilepsy v0.1855 UNC79 Elena Savva Gene: unc79 has been classified as Green List (High Evidence).
Genetic Epilepsy v0.1855 UNC79 Elena Savva Phenotypes for gene: UNC79 were changed from Complex neurodevelopmental disorder - MONDO:0100038 to Neurodevelopmental disorder (MONDO:0700092), UNC70-related
Genetic Epilepsy v0.1855 UNC79 Elena Savva Classified gene: UNC79 as Green List (high evidence)
Genetic Epilepsy v0.1855 UNC79 Elena Savva Gene: unc79 has been classified as Green List (High Evidence).
Genetic Epilepsy v0.1854 UNC79 Elena Savva Marked gene: UNC79 as ready
Genetic Epilepsy v0.1854 UNC79 Elena Savva Gene: unc79 has been removed from the panel.
Genetic Epilepsy v0.1853 UNC79 Krithika Murali edited their review of gene: UNC79: Changed phenotypes: Neurodevelopmental disorder - MONDO:0700092
Genetic Epilepsy v0.1851 UNC79 Krithika Murali gene: UNC79 was added
gene: UNC79 was added to Genetic Epilepsy. Sources: Literature
Mode of inheritance for gene: UNC79 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Publications for gene: UNC79 were set to PMID:37183800
Phenotypes for gene: UNC79 were set to Complex neurodevelopmental disorder - MONDO:0100038
Review for gene: UNC79 was set to AMBER
Added comment: PMID:37183800 Bayat et al 2023 report 6 unrelated patients with heterozygous NMD-predicted LoF variants in UNC79 - x1 canonical splice site variant, x5 nonsense/frameshift. 5 were confirmed de novo, 1 not identified in mother - father unavailable for testing. All variants absent in gnomAD and v2 pLI score for UNC79 is 1.

Patients with UNC79 variants were identified through GeneMatcher or an international network of Epilepsy and Genetics departments. x1 patient underwent duo exome sequencing, remaining had trio exome sequencing - no other causative variants identified.

Phenotypic features included:
- 4/6 autistic features
- 5/6 patients mild-moderate ID
- 4/6 behavioural issues (aggression, stereotypies)
- 4/6 epilepsy (focal to bilateral tonic-clonic seizures)
- 5/6 hypotonia

unc79 knockdown drosophila flies exhibited significantly higher rate of seizure-like behaviour than controls. unc79 haploinsufficiency shown to lead to significant reduction in protein levels of both unc79 and unc80 in mouse brains anddeficiency in hippocampal-dependent learning and memory in mice.

Authors have reviewed their own evidence in relation to the gene-disease criteria detailed by Strande et al 2017 and note that their clinical and experimental data provides moderate-level evidence supporting the association between UNC79 and a neurodevelopment disorder
including ASD.

Evidence emerging is promising, however Amber association favoured due to clinical phenotypic range reported between affected individuals and their lack of specificity.
Sources: Literature