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Mendeliome v0.5914 DPH2 Paul De Fazio changed review comment from: One family reported (PMID:32576952) with biallelic (one missense, one nonsense) variants in DPH2, with phenotype similar to DPH1 deficiency.

Another family was previously reported with biallelic nonsense variants (PMID:27421267) with a comparable phenotype, this family also has biallelic variants in KALRN and the authors thought those variants more likely causative.

In vitro functional assays support reduced diphthamide synthesis activity for the variants identified in PMID:32576952.
Sources: Literature; to: One 19 month old reported (PMID:32576952) with biallelic (one missense, one nonsense) variants in DPH2, with phenotype similar to DPH1 deficiency (gross motor delay, not walking, fine motor and expressive language delays, macrocephaly)

Another family (sibs) was previously reported with biallelic nonsense variants (PMID:27421267) with a comparable phenotype, this family also has biallelic variants in KALRN and the authors thought those variants more likely causative. Patients had ID and microcephaly (in contrast to the 19 month old above).

In vitro functional assays support reduced diphthamide synthesis activity for the variants identified in PMID:32576952.
Sources: Literature
Mendeliome v0.5914 DPH2 Paul De Fazio gene: DPH2 was added
gene: DPH2 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: DPH2 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: DPH2 were set to 32576952; 27421267
Phenotypes for gene: DPH2 were set to Diphthamide-deficiency syndrome
Review for gene: DPH2 was set to AMBER
gene: DPH2 was marked as current diagnostic
Added comment: One family reported (PMID:32576952) with biallelic (one missense, one nonsense) variants in DPH2, with phenotype similar to DPH1 deficiency.

Another family was previously reported with biallelic nonsense variants (PMID:27421267) with a comparable phenotype, this family also has biallelic variants in KALRN and the authors thought those variants more likely causative.

In vitro functional assays support reduced diphthamide synthesis activity for the variants identified in PMID:32576952.
Sources: Literature
Mendeliome v0.3833 KALRN Zornitza Stark Marked gene: KALRN as ready
Mendeliome v0.3833 KALRN Zornitza Stark Gene: kalrn has been classified as Red List (Low Evidence).
Mendeliome v0.3833 KALRN Zornitza Stark Phenotypes for gene: KALRN were changed from to Susceptibility to coronary heart disease; Intellectual disability
Mendeliome v0.3832 KALRN Zornitza Stark Publications for gene: KALRN were set to
Mendeliome v0.3831 KALRN Zornitza Stark Mode of inheritance for gene: KALRN was changed from Unknown to BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.3830 KALRN Zornitza Stark Classified gene: KALRN as Red List (low evidence)
Mendeliome v0.3830 KALRN Zornitza Stark Gene: kalrn has been classified as Red List (Low Evidence).
Mendeliome v0.3829 KALRN Zornitza Stark reviewed gene: KALRN: Rating: RED; Mode of pathogenicity: None; Publications: 17357071, 27421267, 30675382, 32580138; Phenotypes: Susceptibility to coronary heart disease, Intellectual disability; Mode of inheritance: BOTH monoallelic and biallelic, autosomal or pseudoautosomal
Mendeliome v0.0 KALRN Zornitza Stark gene: KALRN was added
gene: KALRN was added to Mendeliome_VCGS. Sources: Expert Review Green,Victorian Clinical Genetics Services
Mode of inheritance for gene: KALRN was set to Unknown