1
|
D'Onofrio G, Cuccurullo C, Larsen SK, Severino M, D'Amico A, Brønstad K, AlOwain M, Morrison JL, Wheeler PG, Webb BD, Alfalah A, Iacomino M, Uva P, Coppola A, Merla G, Salpietro VD, Zara F, Striano P, Accogli A, Arnesen T, Bilo L. Novel biallelic variants expand the phenotype of NAA20-related syndrome. Clin Genet 2023. [PMID: 37191084 DOI: 10.1111/cge.14359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 05/02/2023] [Accepted: 05/04/2023] [Indexed: 05/17/2023]
Abstract
NAA20 is the catalytic subunit of the NatB complex, which is responsible for N-terminal acetylation of approximately 20% of the human proteome. Recently, pathogenic biallelic variants in NAA20 were associated with a novel neurodevelopmental disorder in five individuals with limited clinical information. We report two sisters harboring compound heterozygous variant (c.100C>T (p.Gln34Ter) and c.11T>C p.(Leu4Pro)) in the NAA20 gene, identified by exome sequencing. In vitro studies showed that the missense variant p.Leu4Pro resulted in a reduction of NAA20 catalytic activity due to weak coupling with the NatB auxiliary subunit. In addition, unpublished data of the previous families were reported, outlining the core phenotype of the NAA20-related disorder mostly characterized by cognitive impairment, microcephaly, ataxia, brain malformations, dysmorphism and variable occurrence of cardiac defect and epilepsy. Remarkably, our two patients featured epilepsy onset in adolescence suggesting this may be a part of syndrome evolution. Functional studies are needed to better understand the complexity of NAA20 variants pathogenesis as well as of other genes linked to N-terminal acetylation.
Collapse
Affiliation(s)
- Gianluca D'Onofrio
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, Università degli Studi di Genova, Genoa, Italy
| | - Claudia Cuccurullo
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, Federico II University, Naples, Italy
| | | | | | | | | | - Mohammed AlOwain
- Department of Pathology and Laboratory Medicine, King Faisal Specialist Hospital and Research Centre (KFSHRC), Riyadh, Saudi Arabia
| | | | | | - Bryn D Webb
- School of Medicine and Public Health, University of Wisconsin, Madison, Wisconsin, USA
| | - Abdullah Alfalah
- Department of Medical Genomics, Centre for Genomic Medicine, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Michele Iacomino
- Unit of Medical Genetics - IRCCS Istituto Giannina Gaslini, Genova, Italy
- Clinical Bioinformatics - IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Paolo Uva
- Unit of Medical Genetics - IRCCS Istituto Giannina Gaslini, Genova, Italy
- Clinical Bioinformatics - IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Antonietta Coppola
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, Federico II University, Naples, Italy
| | - Giuseppe Merla
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Naples, Italy
- Laboratory of Regulatory and Functional Genomics, Fondazione IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo (Foggia), Italy
| | | | - Federico Zara
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, Università degli Studi di Genova, Genoa, Italy
- Unit of Medical Genetics - IRCCS Istituto Giannina Gaslini, Genova, Italy
| | - Pasquale Striano
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, Università degli Studi di Genova, Genoa, Italy
- Pediatric Neurology and Muscular Diseases Unit, IRCCS Istituto "Giannina Gaslini", Genoa, Italy
| | - Andrea Accogli
- Division of Medical Genetics, Department of Specialized Medicine, McGill University Health Centre, Montreal, Quebec, Canada
- Department of Human Genetics, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
| | - Thomas Arnesen
- Department of Biomedicine, University of Bergen, Bergen, Norway
- Department of Biological Sciences, University of Bergen, Bergen, Norway
- Department of Surgery, Haukeland University Hospital, Bergen, Norway
| | - Leonilda Bilo
- Department of Neurosciences, Reproductive and Odontostomatological Sciences, Federico II University, Naples, Italy
| |
Collapse
|
2
|
Li W, Wang F, Jiang S, Pan B, Liu Q, Xu Q. Morphological and molecular evolution of hadal amphipod’s eggs provides insights into embryogenesis under high hydrostatic pressure. Front Cell Dev Biol 2022; 10:987409. [PMID: 36172273 PMCID: PMC9511220 DOI: 10.3389/fcell.2022.987409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 08/26/2022] [Indexed: 11/13/2022] Open
Abstract
Hadal zones are unique habitats characterized by high hydrostatic pressure (HHP) and scarce food supplies. The ability of eggs of species dwelling in hadal zones to develop into normal embryo under high hydrostatic pressure is an important evolutionary and developmental trait. However, the mechanisms underlying the development of eggs of hadal-dwelling species remain unknown due to the difficulty of sampling ovigerous females. Here, morphological and transcriptome analyses of eggs of the “supergiant” amphipod Alicella gigantea collected from the New Britain Trench were conducted. The morphology of A. gigantea eggs, including size, was assessed and the ultrastructure of the eggshell was investigated by scanning electron microscopy. Transcriptome sequencing and molecular adaptive evolution analysis of A. gigantea eggs showed that, as compared with shallow-water Gammarus species, genes exhibiting accelerated evolution and the positively selected genes were mostly related to pathways associated with “mitosis” and “chitin-based embryonic cuticle biosynthetic process”, suggesting that “normal mitosis maintenance” and “cuticle development and protection” are the two main adaptation strategies for survival of eggs in hadal environments. In addition, the concentration of trimethylamine oxide (TMAO), an important osmotic regulator, was significantly higher in the eggs of hadal amphipods as compared to those of shallow-water species, which might promote the eggs’ adaptation abilities. Morphological identification, evolutionary analysis, and the trimethylamine oxide concentration of A. gigantea eggs will facilitate a comprehensive overview of the piezophilic adaptation of embryos in hadal environments and provide a strategy to analyze embryogenesis under high hydrostatic pressure.
Collapse
Affiliation(s)
- Wenhao Li
- Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, College of Marine Sciences, Shanghai Ocean University, Shanghai, China
- Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai, China
- Key Laboratory of Aquaculture Resources and Utilization, Ministry of Education, College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai, China
| | - Faxiang Wang
- Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, College of Marine Sciences, Shanghai Ocean University, Shanghai, China
| | - Shouwen Jiang
- Key Laboratory of Aquaculture Resources and Utilization, Ministry of Education, College of Fisheries and Life Sciences, Shanghai Ocean University, Shanghai, China
| | - Binbin Pan
- Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, College of Marine Sciences, Shanghai Ocean University, Shanghai, China
- Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai, China
| | - Qi Liu
- Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, College of Marine Sciences, Shanghai Ocean University, Shanghai, China
| | - Qianghua Xu
- Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, College of Marine Sciences, Shanghai Ocean University, Shanghai, China
- Shanghai Engineering Research Center of Hadal Science and Technology, College of Marine Sciences, Shanghai Ocean University, Shanghai, China
- National Distant-water Fisheries Engineering Research Center, Shanghai Ocean University, Shanghai, China
| |
Collapse
|