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Mendeliome v0.10813 NAA20 Zornitza Stark Phenotypes for gene: NAA20 were changed from Intellectual disability; Microcephaly; Neurodevelopmental disorder MONDO:0700092 to Intellectual developmental disorder, autosomal recessive 73, MIM# 619717
Mendeliome v0.10812 NAA20 Zornitza Stark edited their review of gene: NAA20: Changed phenotypes: Intellectual developmental disorder, autosomal recessive 73, MIM# 619717
Mendeliome v0.10511 NAA20 Zornitza Stark Marked gene: NAA20 as ready
Mendeliome v0.10511 NAA20 Zornitza Stark Gene: naa20 has been classified as Green List (High Evidence).
Mendeliome v0.10511 NAA20 Zornitza Stark Classified gene: NAA20 as Green List (high evidence)
Mendeliome v0.10511 NAA20 Zornitza Stark Gene: naa20 has been classified as Green List (High Evidence).
Mendeliome v0.10510 NAA20 Zornitza Stark gene: NAA20 was added
gene: NAA20 was added to Mendeliome. Sources: Literature
Mode of inheritance for gene: NAA20 was set to BIALLELIC, autosomal or pseudoautosomal
Publications for gene: NAA20 were set to 34230638
Phenotypes for gene: NAA20 were set to Intellectual disability; Microcephaly; Neurodevelopmental disorder MONDO:0700092
Review for gene: NAA20 was set to GREEN
Added comment: 2 consanguineous families with 5 affected individuals with developmental delay, intellectual disability, and microcephaly (-2-4SD). Exome and genome sequencing identified 2 different homozygous variants in NAA20 gene (p.Met54Val and p.Ala80Val), and segregated with affected individuals. N-terminal acetyltransferases modify proteins by adding an acetyl moiety to the first amino acid and are vital for protein and cell function. The NatB complex acetylates 20% of the human proteome and is composed of the catalytic subunit NAA20 and the auxiliary subunit NAA25. Both NAA20-M54V and NAA20-A80V were impaired in their capacity to form a NatB complex with NAA25, and in vitro acetylation assays revealed reduced catalytic activities toward different NatB substrates.
Sources: Literature