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Mendeliome v1.370 DUT Seb Lunke Marked gene: DUT as ready
Mendeliome v1.370 DUT Seb Lunke Gene: dut has been classified as Green List (High Evidence).
Mendeliome v1.370 DUT Seb Lunke Classified gene: DUT as Green List (high evidence)
Mendeliome v1.370 DUT Seb Lunke Gene: dut has been classified as Green List (High Evidence).
Mendeliome v1.369 DUT Daniel Flanagan gene: DUT was added
gene: DUT was added to Mendeliome. Sources: Expert list
Mode of inheritance for gene: DUT was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: DUT were set to 28073829; 35611808
Phenotypes for gene: DUT were set to Bone marrow failure and diabetes mellitus syndrome (MIM#620044)
Review for gene: DUT was set to GREEN
Added comment: Homozygous missense (p.(Tyr142Cys)) identified in eight affected individuals from four unrelated consanguineous families (French, Egyptian, two Libyan) with diabetes and bone marrow failure. DUT silencing in human and rat pancreatic b-cells results in apoptosis via the intrinsic cell death pathway.

p.(Tyr142Cys) has 11 heterozygotes and no homozygotes in gnomAD.
Sources: Expert list
Mendeliome v0.10019 SLIRP Belinda Chong gene: SLIRP was added
gene: SLIRP was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: SLIRP was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: SLIRP were set to 34426662
Phenotypes for gene: SLIRP were set to Mitochondrial encephalomyopathy with complex I and IV deficiency
Review for gene: SLIRP was set to RED
Added comment: Single Dutch non-consanguineous patient having mitochondrial encephalomyopathy with complex I and complex IV deficiency, whole exome sequencing revealed two compound heterozygous variants (NM_031210.5:c.248_252del; NP_112487.1:p.(Ile83Argfs*10) and NC_000014.8:g.78177003 A > G; NM_031210.5:c.98-178 A > G) in SLIRP. Report SLIRP variants as a novel cause of mitochondrial encephalomyopathy with OXPHOS deficiency
Sources: Literature
Mendeliome v0.9347 USP48 Eleanor Williams gene: USP48 was added
gene: USP48 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: USP48 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: USP48 were set to 34059922
Phenotypes for gene: USP48 were set to non-syndromic hearing loss; nonsyndromic genetic deafness, MONDO:0019497
Penetrance for gene: USP48 were set to Incomplete
Review for gene: USP48 was set to GREEN
Added comment: PMID: 34059922 - Bassani et al 2021 - 3 cases reported with variants in USP48 and non syndromic hearing loss. They first analysed 4-generation Italian family with 6 individuals with hearing loss. The only rare variant segregating with the disease was a missense variant in USP48 (NM_032234.7:c.1216G > A, NP_115612.4:p.(Gly406Arg)). The variant is present in GnomAD v2.1.1 with a minor allele frequency (MAF) of 6.7 × 10−5 (17 allele out of 251 304 with no homozygotes). They also observed one hearing individual in the family who was heterozygous for the variant, suggesting incomplete penetrance.
In a Dutch family the found by exome sequencing a missense variant in USP48 (NM_032236.7:c.2215_2216delinsTT, NP_115612.4:p.(Thr739Leu)). The probands mother and uncle were also affected by no sequence data was available for analysis.
In a French family a proband is reported with right profound sensorineural hearing impairment (at 12 months), but normal left hearing (at 6 years old). The patient is heterozygote for a de novo splice variant in USP48 (NM_032236.7:c.3058 + 2 T > C, NP_115612.4:p.?;) which is not found in GnomAD and is predicted to result in a frameshift resulting in either NMD or a truncated protein.
In functional experiments they showed that the two missense variants found in the Italian and Dutch families, and a shortened protein as predicted for the variant found in the French variant, showed an impaired ability to cleave tetra-ubiquitin into tri-, di- and mono-ubiquitin. Using immunohistology, they show that the human USP48 protein is present in fetal inner ear specimens.
In addition zebrafish lacking usp48 showed a significant decrease of auditory response in acoustic startle response assays at 600 and 800 Hz wavelengths.
Sources: Literature
Mendeliome v0.8586 GCNA Ain Roesley gene: GCNA was added
gene: GCNA was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: GCNA was set to X-LINKED: hemizygous mutation in males, biallelic mutations in females
Publications for gene: GCNA were set to 33963445
Phenotypes for gene: GCNA were set to primary spermatogenic failure
Penetrance for gene: GCNA were set to unknown
Review for gene: GCNA was set to GREEN
Added comment: 7x probands all missense except 1 fs. Variants had <0.0005 MAF in gnomad v2 male cohort and absent in 5784 Dutch control cohort
no functional studies were done except for histology of Ser659Trp, revealing a Sertoli-cell only
Sources: Literature
Mendeliome v0.8292 IRX5 Eleanor Williams changed review comment from: Associated with Hamamy syndrome #611174 (AR) in OMIM. Hamamy syndrome is characterised by craniofacial dysmorphism, hearing loss, skeletal anomalies, microcytic hypochromic anemia and congenital heart defects. Severe myopia has also been reported. Homozygous missense variants in IRX5 were reported in 2 families with this condition.

Cone dystrophy
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PMID: 33891002 - Khol et al 2021 - report 3 unrelated families with duplications of a region covering the genes IRX5 and IRX6 completely, and the proximal exons of MMP2 and cone dystrophy. They propose that overexpression of IRX5 and IRX6 may be the cause of the disease, and this is supported by expression analysis in patient-derived fibroblasts and zebrafish experiments.

Initial family is a large 5 generation German family with 14 members with autosomal dominant cone dystrophy in which a 600kb duplicated region covering IRX5/IRX6 and part of MMP2 was identified. 2 additional families of Chinese and Dutch descent with copy number gains of ~700 and ~850 kb, covering the same region were then identified. The smallest region of overlap is 608kb. In addition another family of German decent is reported with adCD and the same duplication as the first German family. It is not known if they are distantly related. Segregation analysis on available members of all families showed the duplication in affected members and not in unaffected.

They find that IRX5, IRX6 and MMP2 are expressed in human adult retina. Several lincRNA within the locus are also expressed. In patient derived fibroblasts IRX5 and IRX6 showed increased expression levels. Over expression of IRX5 and IRX6 results in impaired visual performance in zebrafish larvae.; to: Associated with Hamamy syndrome #611174 (AR) in OMIM. Hamamy syndrome is characterised by craniofacial dysmorphism, hearing loss, skeletal anomalies, microcytic hypochromic anemia and congenital heart defects. Severe myopia has also been reported. Homozygous missense variants in IRX5 were reported in 2 families with this condition (PMID: 22581230;17230486)

Duplication of gene
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PMID: 33891002 - Kohl et al 2021 - report 3 unrelated families with duplications of a region covering the genes IRX5 and IRX6 completely, and the proximal exons of MMP2 and cone dystrophy. They propose that overexpression of IRX5 and IRX6 may be the cause of the disease, and this is supported by expression analysis in patient-derived fibroblasts and zebrafish experiments.

Initial family is a large 5 generation German family with 14 members with autosomal dominant cone dystrophy in which a 600kb duplicated region covering IRX5/IRX6 and part of MMP2 was identified. 2 additional families of Chinese and Dutch descent with copy number gains of ~700 and ~850 kb, covering the same region were then identified. The smallest region of overlap is 608kb. In addition another family of German decent is reported with adCD and the same duplication as the first German family. It is not known if they are distantly related. Segregation analysis on available members of all families showed the duplication in affected members and not in unaffected.

They find that IRX5, IRX6 and MMP2 are expressed in human adult retina. Several lincRNA within the locus are also expressed. In patient derived fibroblasts IRX5 and IRX6 showed increased expression levels. Over expression of IRX5 and IRX6 results in impaired visual performance in zebrafish larvae.

Loss of function/gene
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PMID: 28041643 - Carss et al 2017 - screened a cohort of 722 individuals with inherited retinal disease using WES/WGS. 1 case reported with a biallelic deletion in IRX5 reported which leads to a frameshift ENST00000394636.4; c.1362_1366delTAAAG, p.Lys455ProfsTer19 in a patient with retinitis pigmentosa.

PMID: 32045705 - Apuzzo et al 2020 - report 2 cases of loss of a region in 16q12.1q21 which encompasses IRX5 and IRX6 and many other genes, which together with 3 other previous reports of deletions in this region help define a syndrome with features that include dysmorphic features, short stature, microcephaly, global developmental delay/intellectual disability, autism spectrum disorder (ASD) and ocular abnormalities (nystagmus and strabismus).
Mendeliome v0.8292 IRX6 Eleanor Williams changed review comment from: Not associated with any disorder in OMIM or Gene2Phenotype.

PMID: 33891002 - Khol et al 2021 - report 3 unrelated families with duplications of a region covering the genes IRX5 and IRX6 completely, and the proximal exons of MMP2 and cone dystrophy. They propose that overexpression of IRX5 and IRX6 may be the cause of the disease, and this is supported by expression analysis in patient-derived fibroblasts and zebrafish experiments.

Initial family is a large 5 generation German family with 14 members with autosomal dominant cone dystrophy in which a 600kb duplicated region covering IRX5/IRX6 and part of MMP2 was identified. 2 additional families of Chinese and Dutch descent with copy number gains of ~700 and ~850 kb, covering the same region were then identified. The smallest region of overlap is 608kb. In addition another family of German decent is reported with adCD and the same duplication as the first German family. It is not known if they are distantly related. Segregation analysis on available members of all families showed the duplication in affected members and not in unaffected.

They find that IRX5, IRX6 and MMP2 are expressed in human adult retina. Several lincRNA within the locus are also expressed. In patient derived fibroblasts IRX5 and IRX6 showed increased expression levels. Over expression of IRX5 and IRX6 results in impaired visual performance in zebrafish larvae.
Sources: Literature; to: Not associated with any disorder in OMIM or Gene2Phenotype.

PMID: 33891002 - Kohl et al 2021 - report 3 unrelated families with duplications of a region covering the genes IRX5 and IRX6 completely, and the proximal exons of MMP2 and cone dystrophy. They propose that overexpression of IRX5 and IRX6 may be the cause of the disease, and this is supported by expression analysis in patient-derived fibroblasts and zebrafish experiments.

Initial family is a large 5 generation German family with 14 members with autosomal dominant cone dystrophy in which a 600kb duplicated region covering IRX5/IRX6 and part of MMP2 was identified. 2 additional families of Chinese and Dutch descent with copy number gains of ~700 and ~850 kb, covering the same region were then identified. The smallest region of overlap is 608kb. In addition another family of German decent is reported with adCD and the same duplication as the first German family. It is not known if they are distantly related. Segregation analysis on available members of all families showed the duplication in affected members and not in unaffected.

They find that IRX5, IRX6 and MMP2 are expressed in human adult retina. Several lincRNA within the locus are also expressed. In patient derived fibroblasts IRX5 and IRX6 showed increased expression levels. Over expression of IRX5 and IRX6 results in impaired visual performance in zebrafish larvae.
Sources: Literature
Mendeliome v0.8264 IRX6 Eleanor Williams gene: IRX6 was added
gene: IRX6 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: IRX6 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: IRX6 were set to 33891002
Phenotypes for gene: IRX6 were set to cone dystrophy, MONDO:0000455
Mode of pathogenicity for gene: IRX6 was set to Other
Review for gene: IRX6 was set to GREEN
Added comment: Not associated with any disorder in OMIM or Gene2Phenotype.

PMID: 33891002 - Khol et al 2021 - report 3 unrelated families with duplications of a region covering the genes IRX5 and IRX6 completely, and the proximal exons of MMP2 and cone dystrophy. They propose that overexpression of IRX5 and IRX6 may be the cause of the disease, and this is supported by expression analysis in patient-derived fibroblasts and zebrafish experiments.

Initial family is a large 5 generation German family with 14 members with autosomal dominant cone dystrophy in which a 600kb duplicated region covering IRX5/IRX6 and part of MMP2 was identified. 2 additional families of Chinese and Dutch descent with copy number gains of ~700 and ~850 kb, covering the same region were then identified. The smallest region of overlap is 608kb. In addition another family of German decent is reported with adCD and the same duplication as the first German family. It is not known if they are distantly related. Segregation analysis on available members of all families showed the duplication in affected members and not in unaffected.

They find that IRX5, IRX6 and MMP2 are expressed in human adult retina. Several lincRNA within the locus are also expressed. In patient derived fibroblasts IRX5 and IRX6 showed increased expression levels. Over expression of IRX5 and IRX6 results in impaired visual performance in zebrafish larvae.
Sources: Literature