Monogenic hearing loss
Gene: PSMC3
Comment on list classification: This gene can be promoted to green rating in the next GMS review.Created: 14 Dec 2023, 11:16 a.m. | Last Modified: 14 Dec 2023, 11:18 a.m.
Panel Version: 4.25
Comment on mode of inheritance: There is sufficient evidence for the association of monoallelic variants from this gene with hearing loss. However, there is only one family reported with biallelic variants. Hence, the MOI is set as "MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted".Created: 14 Dec 2023, 11:15 a.m. | Last Modified: 14 Dec 2023, 11:15 a.m.
Panel Version: 4.24
PMID:32500975 - Three individuals from a single extended consanguineous Turkish pedigree was reported with early-onset and rapidly progressive deafness, early-onset cataract, severe developmental delay, severely impaired intellectual development, subcutaneous calcifications and peripheral neuropathy. They were identified with homozygous variant in PSMC3 gene (c.1127 + 337A>G). Functional studies in patient fibroblast cells suggested that the patient PSMC3 variant is responsible for proteasome failure affecting protein homeostasis under stress conditions. This is also supported by evidence from zebrafish models, where PSMC3 knockout has reproduced the human phenotype with inner ear development anomalies as well as cataracts.
PMID:37256937 - 23 individuals with neurodevelopmental disorder were identified with 15 different de novo missense variants. Apart from one child (patient 2), all others had developmental delay characterised by speech delay (19/19) alone or with intellectual disability (16/18) and motor delay (15/19). 9/19 patients had hearing loss, of which two were labelled as sensorineural and one was labelled as conductive. In addition, structural modeling as well as proteomic and transcriptomic analyses of T cells derived from patients with PSMC3 variants implicated the PSMC3 variants in proteasome dysfunction through disruption of substrate translocation, induction of proteotoxic stress, and alterations in proteins controlling developmental and innate immune program.
The phenotype caused by recessive PSMC3 variants has been reported in OMIM (MIM #619354), but not in Gene2Phenotype. However, the phenotype caused by dominant variants has not yet been reported in either resources.
Sources: LiteratureCreated: 14 Dec 2023, 11:13 a.m.
Mode of inheritance
MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Phenotypes
?Deafness, cataract, impaired intellectual development, and polyneuropathy, OMIM:619354; neurodevelopmental disorder, MONDO:0700092; autosomal dominant nonsyndromic hearing loss, MONDO:0019587
Publications
Gene: psmc3 has been classified as Amber List (Moderate Evidence).
Mode of inheritance for gene: PSMC3 was changed from MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted
Tag Q4_23_promote_green tag was added to gene: PSMC3.
gene: PSMC3 was added gene: PSMC3 was added to Monogenic hearing loss. Sources: Literature Mode of inheritance for gene: PSMC3 was set to MONOALLELIC, autosomal or pseudoautosomal, NOT imprinted Publications for gene: PSMC3 were set to 32500975; 37256937 Phenotypes for gene: PSMC3 were set to ?Deafness, cataract, impaired intellectual development, and polyneuropathy, OMIM:619354; neurodevelopmental disorder, MONDO:0700092; autosomal dominant nonsyndromic hearing loss, MONDO:0019587 Review for gene: PSMC3 was set to GREEN