| Date | Panel | Item | Activity | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Monogenic Diabetes v0.136 | ZNF808 | Zornitza Stark Phenotypes for gene: ZNF808 were changed from non-syndromic neonatal diabetes; MONDO:0016391 to Pancreatic agenesis 3, MIM# 620991 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Monogenic Diabetes v0.135 | ZNF808 | Zornitza Stark reviewed gene: ZNF808: Rating: GREEN; Mode of pathogenicity: None; Publications: ; Phenotypes: Pancreatic agenesis 3, MIM# 620991; Mode of inheritance: BIALLELIC, autosomal or pseudoautosomal | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Monogenic Diabetes v0.40 | ZNF808 | Krithika Murali Marked gene: ZNF808 as ready | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Monogenic Diabetes v0.40 | ZNF808 | Krithika Murali Gene: znf808 has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Monogenic Diabetes v0.40 | ZNF808 | Krithika Murali Classified gene: ZNF808 as Green List (high evidence) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Monogenic Diabetes v0.40 | ZNF808 | Krithika Murali Gene: znf808 has been classified as Green List (High Evidence). | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Monogenic Diabetes v0.39 | ZNF808 |
Krithika Murali gene: ZNF808 was added gene: ZNF808 was added to Monogenic Diabetes. Sources: Literature Mode of inheritance for gene: ZNF808 was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: ZNF808 were set to PMID: 37308312 Phenotypes for gene: ZNF808 were set to non-syndromic neonatal diabetes; MONDO:0016391 Review for gene: ZNF808 was set to GREEN Added comment: PMID: 37308312; Alqahtani, MA. et al. (2023) Clin Genet. doi: 10.1111/cge.14389. Three siblings in one consanguineous Saudi Arabian family with non-syndromic neonatal diabetes, all with a homozygous frameshift variant, NM_001321425.2:c.1448dupA, p.(Tyr483*), in ZNF808. (Same nucleotide and amino acid numbering as for the MANE SELECT transcript, NM_001039886.4). This variant has been entered as likely pathogenic in ClinVar by this group. This variant occurs in the last exon of the gene and is therefore not NMD-predicted. Instead it is predicted to cause a truncated protein. This paper shows a diagram with several other truncating variants in this exon, which were reported in the paper by De Franco, E. et al. (2021). (These patients also had low vitamin D levels, suggesting an association, and is consistent with other studies looking into loci that are associated with vitamin D). De Franco, E. et al. (2021) medRxiv 08.23.21262262. (Exeter, UK): Firstly, this group found a homozygous variant NM_001039886.3:c.637del, p.(Leu213*) that is predicted to cause a truncated protein, and also a homozygous CNV Chr19(GRCh37):g.53057128_53100968del (predicted to cause a deletion of exons 4 and 5) in two unrelated affected individuals. These patients had pancreatic agenesis, defined as insulin-dependent diabetes in the first 6 months of life (neonatal diabetes) and exocrine pancreatic insufficiency. Both were from consanguineous families. Parents were subsequently tested and shown to be heterozygous carriers. They then investigated 232 additional patients who had been diagnosed with neonatal diabetes before the age of 6 months and found ten more homozygous ZNF808 variants. Six were nonsense: p.(Gln194*), p.(Cys233*), p.(Tyr427*), p.(Lys458*), p.(Tyr528*) and p.(Arg727*), and three were frameshift variants: p.(Ala379Valfs*157), p.(Leu588Profs*118), p.(Asn770Ilefs*98) and one was a whole-gene deletion. All the frameshift and nonsense variants occurred in the last exon of the gene, which contains all 23 zinc finger domains; and therefore all of these variants are predicted to result in truncated proteins, and removal of some, if not all, those domains. This group also carried out functional studies using an in vitro model of pancreas development and showed an aberrant activation of many transposable elements (mostly MER11 elements) that would be normally be repressed during early pancreas development. Sources: Literature |
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