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Goel H, O'Donnell S. Inherited loss of function variant in CSNK2A1: the oldest reported cases of Okur-Chung syndrome in a single family. Clin Dysmorphol 2024; 33:121-124. [PMID: 38818820 DOI: 10.1097/mcd.0000000000000502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Affiliation(s)
- Himanshu Goel
- General Genetics Service, Hunter Genetics, Waratah, NSW, Australia
- School of Medicine and Public Health, University of Newcastle, Callaghan, NSW, Australia
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Blanc A, Bonnet C, Wandzel M, Roth V, Duffourd Y, Safraou H, Leheup B, Muller F, D Colne J, Feillet F, Schmitt E, Castro M, Savatt J, Burcheri A, Nemos C, Philippe C, Lambert L. Patient with a heterozygous pathogenic variant in CSNK2A1 gene: A new case to update the Okur-Chung neurodevelopmental syndrome. Am J Med Genet A 2024:e63642. [PMID: 38711237 DOI: 10.1002/ajmg.a.63642] [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: 03/05/2024] [Revised: 04/07/2024] [Accepted: 04/11/2024] [Indexed: 05/08/2024]
Abstract
The autosomal dominant Okur-Chung neurodevelopmental syndrome (OCNDS: OMIM #617062) is a rare neurodevelopmental disorder first described in 2016. Features include developmental delay (DD), intellectual disability (ID), behavioral problems, hypotonia, language deficits, congenital heart abnormalities, and non-specific dysmorphic facial features. OCNDS is caused by heterozygous pathogenic variants in CSNK2A1 (OMIM *115440; NM_177559.3). To date, 160 patients have been diagnosed worldwide. The number will likely increase due to the growing use of exome sequencing (ES) and genome sequencing (GS). Here, we describe a novel OCNDS patient carrying a CSNK2A1 variant (NM_177559.3:c.140G>A; NP_808227.1:p.Arg47Gln). Phenotypically, he presented with DD, ID, generalized hypotonia, speech delay, short stature, microcephaly, and dysmorphic features such as low-set ears, hypertelorism, thin upper lip, and a round face. The patient showed several signs not yet described that may extend the phenotypic spectrum of OCNDS. These include prenatal bilateral clubfeet, exotropia, and peg lateral incisors. However, unlike the majority of descriptions, he did not present sleep disturbance, seizures or gait difficulties. A literature review shows phenotypic heterogeneity for OCNDS, whether these patients have the same variant or not. This case report is an opportunity to refine the phenotype of this syndrome and raise the question of the genotype-phenotype correlation.
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Affiliation(s)
- Albin Blanc
- Service de génétique clinique, CHRU de Nancy, Nancy, France
| | - Céline Bonnet
- Laboratoire de génétique médicale, CHRU Nancy, Nancy, France
- Université de Lorraine, INSERM UMR_S1256, NGERE, Nancy, France
| | - Marion Wandzel
- Laboratoire de génétique médicale, CHRU Nancy, Nancy, France
| | - Virginie Roth
- Laboratoire de génétique médicale, CHRU Nancy, Nancy, France
| | - Yannis Duffourd
- Unité Fonctionnelle Innovation en Diagnostic génomique des maladies rares, CHU Dijon Bourgogne, Dijon, France
- Université de Bourgogne, INSERM UMR_1231 GAD, Dijon, France
| | - Hanna Safraou
- Unité Fonctionnelle Innovation en Diagnostic génomique des maladies rares, CHU Dijon Bourgogne, Dijon, France
- Université de Bourgogne, INSERM UMR_1231 GAD, Dijon, France
| | - Bruno Leheup
- Université de Lorraine, INSERM UMR_S1256, NGERE, Nancy, France
| | - Florence Muller
- Service de Chirurgie orthopédique infantile, CHRU Nancy, Nancy, France
| | | | - François Feillet
- Université de Lorraine, INSERM UMR_S1256, NGERE, Nancy, France
- Centre de Référence des maladies métaboliques, CHRU Nancy, Nancy, France
| | | | - Matheus Castro
- Mendelics Genomic Analysis, São Paulo, Brazil
- Medical Genetics Unit, Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo HCFMUSP, São Paulo, Brazil
| | - Jullian Savatt
- Autism & Developmental Medicine Institute, Danville, Pennsylvania, USA
| | - Adriano Burcheri
- Département de Biopathologie - Anatomie et Cytologie Pathologiques, CHRU de Nancy, Nancy, France
| | - Christophe Nemos
- Laboratoire de fœtopathologie et de placentologie, CHRU Nancy, Nancy, France
- Département d'histologie, embryologie et cytogénétique de la faculté de médecine, Université de Lorraine, Nancy, France
- Département de Génie Biologique Santé de l'IUT Nancy-Brabois, Université de Lorraine, Nancy, France
- Université de Lorraine Biofonctionnalités et Risques Neurotoxiques (Calbinotox), Nancy, France
| | - Christophe Philippe
- Unité Fonctionnelle Innovation en Diagnostic génomique des maladies rares, CHU Dijon Bourgogne, Dijon, France
- Université de Bourgogne, INSERM UMR_1231 GAD, Dijon, France
| | - Laëtitia Lambert
- Service de génétique clinique, CHRU de Nancy, Nancy, France
- Université de Lorraine, INSERM UMR_S1256, NGERE, Nancy, France
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Nan H, Chu M, Zhang J, Jiang D, Wang Y, Wu L. Okur-Chung neurodevelopmental syndrome: Implications for phenotype and genotype expansion. Mol Genet Genomic Med 2024; 12:e2398. [PMID: 38444259 PMCID: PMC10915366 DOI: 10.1002/mgg3.2398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 01/17/2024] [Accepted: 01/31/2024] [Indexed: 03/07/2024] Open
Abstract
BACKGROUND Okur-Chung neurodevelopmental syndrome (OCNDS) is a rare autosomal dominant disorder caused by pathogenic variants in CSNK2A1. It is characterized by intellectual disability, developmental delay, and multisystemic abnormalities. METHODS We performed the whole-exome sequencing for a patient in a Chinese family. The co-segregation study using the Sanger sequencing method was performed among family members. Reverse transcription and quantitative real-time polymerase chain reaction were carried out using total RNA from blood samples of the proband and wild-type control subjects. A review of patients with OCNDS harboring CSNK2A1 pathogenic variants was conducted through a comprehensive search of the PubMed database. RESULTS We identified a novel CSNK2A1 frameshift variant p.Tyr323Leufs*16 in a Chinese family. The proband, a 31-year-old female, presented with abnormal eating habits, recurrent seizures, language impairment, and intellectual disability. Her mother exhibited postnatal hernias, splenomegaly, and a predisposition to infections, but showed no significant developmental impairments or intellectual disability. Genetic studies revealed the presence of this variant in CSNK2A1 in both the proband and her mother. Transcription analysis revealed this variant may lead to nonsense-mediated mRNA decay, suggesting haploinsufficiency as a potential disease mechanism. We reviewed 47 previously reported OCNDS cases and discovered that individuals carrying CSNK2A1 null variants may exhibit a diminished frequency of symptoms linked to language deficits, dysmorphic facial features, or intellectual disability, consequently presenting an overall milder phenotype when compared to those with missense variants. CONCLUSION We report a novel frameshift variant, p.Tyr323Leufs*16, in an OCNDS family with a generally mild phenotype. This study may broaden the spectrum of clinical presentations associated with OCNDS and contribute novel insights into the genotype-phenotype correlation of this condition.
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Affiliation(s)
- Haitian Nan
- Department of Neurology, Xuanwu HospitalCapital Medical UniversityBeijingChina
| | - Min Chu
- Department of Neurology, Xuanwu HospitalCapital Medical UniversityBeijingChina
| | - Jing Zhang
- Department of Neurology, Xuanwu HospitalCapital Medical UniversityBeijingChina
| | - Deming Jiang
- Department of Neurology, Xuanwu HospitalCapital Medical UniversityBeijingChina
| | - Yihao Wang
- Department of Neurology, Xuanwu HospitalCapital Medical UniversityBeijingChina
| | - Liyong Wu
- Department of Neurology, Xuanwu HospitalCapital Medical UniversityBeijingChina
- National Clinical Research Center for Geriatric DiseasesBeijingChina
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Zhuri D, Dusenkalkan F, Tunca Alparslan G, Gurkan H. A Case of Okur-Chung Neurodevelopmental Syndrome with a Novel, de novo Variant on the CSNK2A1 Gene in a Turkish Patient. Mol Syndromol 2024; 15:43-50. [PMID: 38357263 PMCID: PMC10862324 DOI: 10.1159/000530585] [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: 12/28/2022] [Accepted: 04/02/2023] [Indexed: 02/16/2024] Open
Abstract
Introduction Okur-Chung neurodevelopmental syndrome (OCNDS; #617062) has been associated with heterozygous mutations in the CSNK2A1 gene (*115440) mapped on the chromosome's 20p13 region. Case Presentation The analysis was performed on a 2-year-old patient who was admitted to our genetic diseases evaluation center by his family with a complaint of hypotonia. We detected a heterozygous NM_177559.3 (CSNK2A1):c.1139_1140dupGG (p.Met381GlyfsTer32) variant in the CSNK2A1 gene from a whole-exome sequence analysis. Conclusion The variant that we detected has not been reported in open-access databases to date, so it was evaluated as a novel likely pathogenic variant according to the ACMG-2015 criteria. No variant was detected upon segregation analysis of the patient's parents; therefore, the related variant was evaluated as de novo. In this study, we offer the first report of a pathogenic frameshift variant in the CSNK2A1 gene that has a relationship with OCNDS.
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Affiliation(s)
- Drenushe Zhuri
- Department of Medical Genetics, Trakya University Faculty of Medicine, Edirne, Turkey
| | - Fulya Dusenkalkan
- Department of Medical Genetics, Trakya University Faculty of Medicine, Edirne, Turkey
| | - Guzin Tunca Alparslan
- Department of Genetics and Bioengineering, Trakya University Faculty of Engineering, Edirne, Turkey
| | - Hakan Gurkan
- Department of Medical Genetics, Trakya University Faculty of Medicine, Edirne, Turkey
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Brauner R, Bignon-Topalovic J, Bashamboo A, McElreavey K. Exome sequencing in 16 patients with pituitary stalk interruption syndrome: A monocentric study. PLoS One 2023; 18:e0292664. [PMID: 38096238 PMCID: PMC10721018 DOI: 10.1371/journal.pone.0292664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 09/26/2023] [Indexed: 12/17/2023] Open
Abstract
Pituitary stalk interruption syndrome (PSIS) is a rare disorder characterized by an absent or ectopic posterior pituitary, absent or interrupted pituitary stalk and anterior pituitary hypoplasia on magnetic resonance imaging (MRI), as well in some cases a range of heterogeneous somatic anomalies. The triad can be incomplete. Here, we performed exome sequencing on 16 sporadic patients, aged 0.4 to 13.7 years diagnosed with isolated or complex PSIS. Growth hormone deficiency was isolated in 10 cases, or associated with thyrotropin deficiency in 6 others (isolated (2 cases), associated with adrenocorticotropin deficiency (1 case), gonadotropins deficiency (1 case), or multiple deficiencies (2 cases)). Additional phenotypic anomalies were present in six cases (37.5%) including four with ophthalmic disorders. In 13 patients variants were identified that may contribute to the phenotype. However, only a single individual carried a variant classified as pathogenic. This child presented with the typical clinical presentation of Okur-Chung neurodevelopmental syndrome due to a CSNK2A1 missense variant. We also identified variants in the holoprosencephaly associated genes GLI2 and PTCH1. A likely pathogenic novel splice site variant in the GLI2 gene was observed in a child with PSIS and megacisterna magna. In the remaining 11 cases 26 variants in genes associated with pituitary development or function were identified and were classified of unknown significance. Compared with syndromic forms the diagnostic yield in the isolated forms of PSIS is low. Although we identified rare or novel missense variants in several hypogonadotropic hypogonadism genes (e.g. FGF17, HS6ST1, KISS1R, CHD7, IL17RD) definitively linking them to the PSIS phenotype is premature. A major challenge remains to identify pathogenic variants in cases with isolated PSIS.
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Affiliation(s)
- Raja Brauner
- Pediatric Endocrinology Unit, Hôpital Fondation Adolphe de Rothschild and Université Paris Cité, Paris, France
| | | | - Anu Bashamboo
- Human Developmental Genetic Unit, Institut Pasteur, Paris, France
| | - Ken McElreavey
- Human Developmental Genetic Unit, Institut Pasteur, Paris, France
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Wafik M, Kuoppamaa H, Hirani P, Hignett J, Lillis S, Lascelles K, Sardesai S, Gomez K, Holder-Espinasse M. Two novel CSNK2A1 variants associated with mild Okur-Chung neurodevelopmental syndrome phenotype. Clin Dysmorphol 2023; 32:116-123. [PMID: 37195306 DOI: 10.1097/mcd.0000000000000456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Affiliation(s)
- Mohamed Wafik
- Department of Clinical Genetics, Guy's and St Thomas' NHS Foundation Trust
| | | | | | - John Hignett
- Viapath LLP, Guy's Hospital, 5th Floor Tower Wing
| | | | | | - Shweta Sardesai
- Community Paediatrics Medical Service, Oxleas NHS Foundation Trust
| | - Kumudini Gomez
- Department of Paediatrics, University Hospital Lewisham, London, UK
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Jafari Khamirani H, Zoghi S, Motealleh A, Dianatpour M, Tabei SMB, Mohammadi S, Dastgheib SA. Clinical Features of Okur-Chung Neurodevelopmental Syndrome: Case Report and Literature Review. Mol Syndromol 2022; 13:381-388. [PMID: 36588763 PMCID: PMC9801326 DOI: 10.1159/000522353] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 02/01/2022] [Indexed: 01/04/2023] Open
Abstract
Introduction Autosomal dominant pathogenic variations in the CSNK2A1 gene cause Okur-Chung neurodevelopmental syndrome (OCNDS). Methods The proband and her parents were examined thoroughly and observed for any issues related to OCNDS. Furthermore, peripheral blood samples were collected from each subject for further investigations. Whole-exome sequencing identified a pathogenic variant in CSNK2A1 (NM_001895: c.62G>A, p.R21Q; rs1402734448). Results The proband has global developmental delay, speech disorders, epilepsy, and behavioral issues. Despite the previously reported cases, she manifested both atonic and myoclonic seizures simultaneously. Lastly, we provide a review of the reported cases with OCNDS. Discussion p.R21Q causes OCNDS. Further studies are highly recommended concerning this mutation to validate the results of this study and expand the knowledge regarding CSNK2A1 and the phenotypic spectrum of OCNDS.
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Affiliation(s)
- Hossein Jafari Khamirani
- Comprehensive Medical Genetics Center, Shiraz University of Medical Sciences, Shiraz, Iran,Department of Medical Genetics, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sina Zoghi
- Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ali Motealleh
- Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mehdi Dianatpour
- Department of Medical Genetics, Shiraz University of Medical Sciences, Shiraz, Iran,Stem Cells Technology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyed Mohammad Bagher Tabei
- Department of Medical Genetics, Shiraz University of Medical Sciences, Shiraz, Iran,Maternal-Fetal Medicine Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sanaz Mohammadi
- Comprehensive Medical Genetics Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyed Alireza Dastgheib
- Department of Medical Genetics, Shiraz University of Medical Sciences, Shiraz, Iran,*Seyed Alireza Dastgheib,
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Unni P, Friend J, Weinberg J, Okur V, Hochscherf J, Dominguez I. Predictive functional, statistical and structural analysis of CSNK2A1 and CSNK2B variants linked to neurodevelopmental diseases. Front Mol Biosci 2022; 9:851547. [PMID: 36310603 PMCID: PMC9608649 DOI: 10.3389/fmolb.2022.851547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 06/29/2022] [Indexed: 12/02/2022] Open
Abstract
Okur-Chung Neurodevelopmental Syndrome (OCNDS) and Poirier-Bienvenu Neurodevelopmental Syndrome (POBINDS) were recently identified as rare neurodevelopmental disorders. OCNDS and POBINDS are associated with heterozygous mutations in the CSNK2A1 and CSNK2B genes which encode CK2α, a serine/threonine protein kinase, and CK2β, a regulatory protein, respectively, which together can form a tetrameric enzyme called protein kinase CK2. A challenge in OCNDS and POBINDS is to understand the genetic basis of these diseases and the effect of the various CK2⍺ and CK2β mutations. In this study we have collected all variants available to date in CSNK2A1 and CSNK2B, and identified hotspots. We have investigated CK2⍺ and CK2β missense mutations through prediction programs which consider the evolutionary conservation, functionality and structure or these two proteins, compared these results with published experimental data on CK2α and CK2β mutants, and suggested prediction programs that could help predict changes in functionality of CK2α mutants. We also investigated the potential effect of CK2α and CK2β mutations on the 3D structure of the proteins and in their binding to each other. These results indicate that there are functional and structural consequences of mutation of CK2α and CK2β, and provide a rationale for further study of OCNDS and POBINDS-associated mutations. These data contribute to understanding the genetic and functional basis of these diseases, which is needed to identify their underlying mechanisms.
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Affiliation(s)
- Prasida Unni
- Department of Medicine, Boston University School of Medicine and Boston Medical Center, Boston University, Boston, MA, United States
| | - Jack Friend
- Department of Medicine, Boston University School of Medicine and Boston Medical Center, Boston University, Boston, MA, United States
| | - Janice Weinberg
- Department of Biostatistics, Boston University School of Public Health, Boston University, Boston, MA, United States
| | - Volkan Okur
- New York Genome Center, New York, NY, United States
| | - Jennifer Hochscherf
- Department of Chemistry, Institute of Biochemistry, University of Cologne, Cologne, Germany
| | - Isabel Dominguez
- Department of Medicine, Boston University School of Medicine and Boston Medical Center, Boston University, Boston, MA, United States
- *Correspondence: Isabel Dominguez,
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Manoochehri J, Kamal N, Khamirani HJ, Zoghi S, Haghighi MF, Goodarzi HR, Bagher Tabei SM. A combination of two novels homozygous FCSK variants cause disorder of glycosylation with defective fucosylation: New patient and literature review. Eur J Med Genet 2022; 65:104535. [PMID: 35718084 DOI: 10.1016/j.ejmg.2022.104535] [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: 05/07/2021] [Revised: 04/04/2022] [Accepted: 06/05/2022] [Indexed: 11/26/2022]
Abstract
Pathogenic variants in FCSK cause Congenital Disorder of Glycosylation with Defective Fucosylation-2 (FCSK-CDG; MIM: 618,324). It is a rare autosomal recessive genetic disease caused by defects in the L-fucose kinase, which is necessary for the fucose salvage pathway. Herein, we report two novel variants in an Iranian patient, the fourth individual with FCSK-CDG described in the literature. Two homozygous variants in FCSK (rs376941268; NM_145059.3: c.379C > A, p. Leu127Met and rs543223292; NM_145059.3: c.394G > C, p. Asp132His) were identified in the proband. Sanger sequencing conducted on his unaffected parents revealed that they were heterozygous for the same variants. The proband, a four-and-a-half year old Iranian male born to consanguineous parents, manifested Intellectual disability, growth delay, ophthalmic abnormalities, seizures, speech disorder, and feeding difficulties.
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Affiliation(s)
- Jamal Manoochehri
- Department of Genetics, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
| | - Neda Kamal
- Department of Medical Genetics, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hossein Jafari Khamirani
- Department of Medical Genetics, Shiraz University of Medical Sciences, Shiraz, Iran; Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Sina Zoghi
- Student Research Committee, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Maryam Fazelzadeh Haghighi
- Department of Molecular Medicine, School of Advanced Technologies, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Hamed Reza Goodarzi
- Department of Genetics, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran
| | - Seyed Mohammad Bagher Tabei
- Department of Genetics, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran; Department of Medical Genetics, Shiraz University of Medical Sciences, Shiraz, Iran; Maternal-fetal Medicine Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
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Ballardin D, Cruz-Gamero JM, Bienvenu T, Rebholz H. Comparing Two Neurodevelopmental Disorders Linked to CK2: Okur-Chung Neurodevelopmental Syndrome and Poirier-Bienvenu Neurodevelopmental Syndrome—Two Sides of the Same Coin? Front Mol Biosci 2022; 9:850559. [PMID: 35693553 PMCID: PMC9182197 DOI: 10.3389/fmolb.2022.850559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 03/01/2022] [Indexed: 12/27/2022] Open
Abstract
In recent years, variants in the catalytic and regulatory subunits of the kinase CK2 have been found to underlie two different, yet symptomatically overlapping neurodevelopmental disorders, termed Okur-Chung neurodevelopmental syndrome (OCNDS) and Poirier-Bienvenu neurodevelopmental syndrome (POBINDS). Both conditions are predominantly caused by de novo missense or nonsense mono-allelic variants. They are characterized by a generalized developmental delay, intellectual disability, behavioral problems (hyperactivity, repetitive movements and social interaction deficits), hypotonia, motricity and verbalization deficits. One of the main features of POBINDS is epilepsies, which are present with much lower prevalence in patients with OCNDS. While a role for CK2 in brain functioning and development is well acknowledged, these findings for the first time clearly link CK2 to defined brain disorders. Our review will bring together patient data for both syndromes, aiming to link symptoms with genotypes, and to rationalize the symptoms through known cellular functions of CK2 that have been identified in preclinical and biochemical contexts. We will also compare the symptomatology and elaborate the specificities that distinguish the two syndromes.
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Affiliation(s)
- Demetra Ballardin
- INSERM U1266, Institute of Psychiatry and Neuroscience of Paris, Université de Paris, Paris, France
- GHU-Paris Psychiatrie et Neurosciences, Hôpital Sainte Anne, Paris, France
| | - Jose M. Cruz-Gamero
- INSERM U1266, Institute of Psychiatry and Neuroscience of Paris, Université de Paris, Paris, France
| | - Thierry Bienvenu
- INSERM U1266, Institute of Psychiatry and Neuroscience of Paris, Université de Paris, Paris, France
- Service de Médecine Génomique des Maladies de Système et d’organe, Hôpital Cochin, APHP, Centre Université de Paris, Paris, France
| | - Heike Rebholz
- INSERM U1266, Institute of Psychiatry and Neuroscience of Paris, Université de Paris, Paris, France
- GHU-Paris Psychiatrie et Neurosciences, Hôpital Sainte Anne, Paris, France
- Center of Neurodegeneration, Faculty of Medicine, Danube Private University, Krems, Austria
- *Correspondence: Heike Rebholz,
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Werner C, Gast A, Lindenblatt D, Nickelsen A, Niefind K, Jose J, Hochscherf J. Structural and Enzymological Evidence for an Altered Substrate Specificity in Okur-Chung Neurodevelopmental Syndrome Mutant CK2αLys198Arg. Front Mol Biosci 2022; 9:831693. [PMID: 35445078 PMCID: PMC9014129 DOI: 10.3389/fmolb.2022.831693] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 02/28/2022] [Indexed: 11/13/2022] Open
Abstract
Specific de novo mutations in the CSNK2A1 gene, which encodes CK2α, the catalytic subunit of protein kinase CK2, are considered as causative for the Okur-Chung neurodevelopmental syndrome (OCNDS). OCNDS is a rare congenital disease with a high phenotypic diversity ranging from neurodevelopmental disabilities to multi-systemic problems and characteristic facial features. A frequent OCNDS mutation is the exchange of Lys198 to Arg at the center of CK2α′s P+1 loop, a key element of substrate recognition. According to preliminary data recently made available, this mutation causes a significant shift of the substrate specificity of the enzyme. We expressed the CK2αLys198Arg recombinantly and characterized it biophysically and structurally. Using isothermal titration calorimetry (ITC), fluorescence quenching and differential scanning fluorimetry (Thermofluor), we found that the mutation does not affect the interaction with CK2β, the non-catalytic CK2 subunit, and that the thermal stability of the protein is even slightly increased. However, a CK2αLys198Arg crystal structure and its comparison with wild-type structures revealed a significant shift of the anion binding site harboured by the P+1 loop. This observation supports the notion that the Lys198Arg mutation causes an alteration of substrate specificity which we underpinned here with enzymological data.
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Affiliation(s)
- Christian Werner
- Department of Chemistry, Institute of Biochemistry, University of Cologne, Cologne, Germany
| | - Alexander Gast
- Institute of Pharmaceutical and Medicinal Chemistry, University of Münster, Münster, Germany
| | - Dirk Lindenblatt
- Department of Chemistry, Institute of Biochemistry, University of Cologne, Cologne, Germany
| | - Anna Nickelsen
- Institute of Pharmaceutical and Medicinal Chemistry, University of Münster, Münster, Germany
| | - Karsten Niefind
- Department of Chemistry, Institute of Biochemistry, University of Cologne, Cologne, Germany
| | - Joachim Jose
- Institute of Pharmaceutical and Medicinal Chemistry, University of Münster, Münster, Germany
| | - Jennifer Hochscherf
- Department of Chemistry, Institute of Biochemistry, University of Cologne, Cologne, Germany
- *Correspondence: Jennifer Hochscherf,
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Murakami H, Uehara T, Enomoto Y, Nishimura N, Kumaki T, Kuroda Y, Asano M, Aida N, Kosaki K, Kurosawa K. Persistent Hyperplastic Primary Vitreous with Microphthalmia and Coloboma in a Patient with Okur-Chung Neurodevelopmental Syndrome. Mol Syndromol 2022; 13:75-79. [PMID: 35221879 PMCID: PMC8832215 DOI: 10.1159/000517977] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Accepted: 06/18/2021] [Indexed: 07/23/2024] Open
Abstract
Okur-Chung neurodevelopmental syndrome is a rare autosomal dominant disorder caused by pathogenic variants in CSNK2A1, which encodes the alpha 1 catalytic subunit of -casein kinase II. This syndrome is characterized by intellectual disability, developmental delay, and multisystemic -abnormalities including those of the brain, extremities, and skin as well as cardiovascular, gastrointestinal, and immune systems. In this study, we describe a 5-year-old boy with a de novo novel nonsense variant in CSNK2A1, NM_001895.3:c.319C>T (p.Arg107*). He showed bilateral persistent hyperplastic primary vitreous with microphthalmia, lens dysplasia, and coloboma. Ocular manifestations are very rare in this syndrome, and this study expands the spectrum of the clinical presentations of this syndrome.
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Affiliation(s)
- Hiroaki Murakami
- Division of Medical Genetics, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Tomoko Uehara
- Center for Medical Genetics, Keio University School of Medicine, Tokyo, Japan
| | - Yumi Enomoto
- Clinical Research Institute, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Naoto Nishimura
- Division of Medical Genetics, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Tatsuro Kumaki
- Division of Medical Genetics, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Yukiko Kuroda
- Division of Medical Genetics, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Mizuki Asano
- Department of Ophthalmology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Noriko Aida
- Department of Radiology, Kanagawa Children's Medical Center, Yokohama, Japan
| | - Kenjiro Kosaki
- Center for Medical Genetics, Keio University School of Medicine, Tokyo, Japan
| | - Kenji Kurosawa
- Division of Medical Genetics, Kanagawa Children's Medical Center, Yokohama, Japan
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13
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Kyriakou G. Synophrys: The societal implications of the bad ol' unibrow. Clin Dermatol 2021; 39:738-742. [PMID: 34809785 DOI: 10.1016/j.clindermatol.2020.10.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The complete or partial meeting of medial eyebrows at midline above the bridge of nose, forming a single band of hair, is known as synophrys or unibrow. With a few rare exceptions, when it may serve as a cutaneous marker lesion of several genetic disorders, with Cornelia De Lange syndrome being the commonest, synophrys is usually a normal variation. Although various cultures have prized synophrys as an attractive physical trait throughout history, in modern Western culture, the unibrow is frequently regarded as an undesirable and unappealing feature with negative connotations. Synophrys, derived from the Ancient Greek σύν (together, with) and ὀφρύς (eyebrow), meaning "with meeting eyebrows," refers to the complete or partial fusion of medial eyebrows at midline. The hair above the nasal bridge is often of the same color and thickness as the eyebrows, thus giving the appearance that they converge to form one uninterrupted line of hair, a single eyebrow.
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Affiliation(s)
- Georgia Kyriakou
- Department of Dermatology, University General Hospital of Patras, Rio, Greece.
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14
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Ranganath P, Ranganath P, Vineeth VS, Dalal A, Patil SJ. Report of an Asian-Indian patient with Okur-Chung Syndrome and comparison of the clinical phenotype in different ethnic groups. Clin Dysmorphol 2021; 30:209-212. [PMID: 34417372 DOI: 10.1097/mcd.0000000000000383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Priya Ranganath
- Department of Medical genetics, Nizam's Institute of Medical Sciences
| | - Prajnya Ranganath
- Department of Medical genetics, Nizam's Institute of Medical Sciences
| | - V S Vineeth
- Diagnostics Division, Centre for DNA Fingerprinting and Diagnostics, Hyderabad, Telangana
| | - Ashwin Dalal
- Diagnostics Division, Centre for DNA Fingerprinting and Diagnostics, Hyderabad, Telangana
| | - Siddaramappa J Patil
- Division of Medical Genetics, Mazumdar Shaw Medical Centre, Narayana Hrudayalaya Hospitals, Bangalore, Karnataka, India
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15
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CK2 Regulation: Perspectives in 2021. Biomedicines 2021; 9:biomedicines9101361. [PMID: 34680478 PMCID: PMC8533506 DOI: 10.3390/biomedicines9101361] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 09/23/2021] [Accepted: 09/26/2021] [Indexed: 12/20/2022] Open
Abstract
The protein kinase CK2 (CK2) family encompasses a small number of acidophilic serine/threonine kinases that phosphorylate substrates involved in numerous biological processes including apoptosis, cell proliferation, and the DNA damage response. CK2 has also been implicated in many human malignancies and other disorders including Alzheimer′s and Parkinson’s diseases, and COVID-19. Interestingly, no single mechanism describes how CK2 is regulated, including activation by external proteins or domains, phosphorylation, or dimerization. Furthermore, the kinase has an elongated activation loop that locks the kinase into an active conformation, leading CK2 to be labelled a constitutively active kinase. This presents an interesting paradox that remains unanswered: how can a constitutively active kinase regulate biological processes that require careful control? Here, we highlight a selection of studies where CK2 activity is regulated at the substrate level, and discuss them based on the regulatory mechanism. Overall, this review describes numerous biological processes where CK2 activity is regulated, highlighting how a constitutively active kinase can still control numerous cellular activities. It is also evident that more research is required to fully elucidate the mechanisms that regulate CK2 and what causes aberrant CK2 signaling in disease.
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16
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Wu RH, Tang WT, Qiu KY, Li XJ, Tang DX, Meng Z, He ZW. Identification of novel CSNK2A1 variants and the genotype-phenotype relationship in patients with Okur-Chung neurodevelopmental syndrome: a case report and systematic literature review. J Int Med Res 2021; 49:3000605211017063. [PMID: 34038195 PMCID: PMC8161887 DOI: 10.1177/03000605211017063] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
De novo germline variants of the casein kinase 2α subunit (CK2α) gene (CSNK2A1) have been reported in individuals with the congenital neuropsychiatric disorder Okur-Chung neurodevelopmental syndrome (OCNS). Here, we report on two unrelated children with OCNS and review the literature to explore the genotype-phenotype relationship in OCNS. Both children showed facial dysmorphism, growth retardation, and neuropsychiatric disorders. Using whole-exome sequencing, we identified two novel de novo CSNK2A1 variants: c.479A>G p.(H160R) and c.238C>T p.(R80C). A search of the literature identified 12 studies that provided information on 35 CSNK2A1 variants in various protein-coding regions of CK2α. By quantitatively analyzing data related to these CSNK2A1 variants and their corresponding phenotypes, we showed for the first time that mutations in protein-coding CK2α regions appear to influence the phenotypic spectrum of OCNS. Mutations altering the ATP/GTP-binding loop were more likely to cause the widest range of phenotypes. Therefore, any assessment of clinical spectra for this disorder should be extremely thorough. This study not only expands the mutational spectrum of OCNS, but also provides a comprehensive overview to improve our understanding of the genotype-phenotype relationship in OCNS.
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Affiliation(s)
- Ruo-Hao Wu
- Department of Children's Neuroendocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University Guangzhou, P. R. China.,Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong High Education Institutes, Sun Yat-sen University Guangzhou, P. R. China
| | - Wen-Ting Tang
- Department of Research and Molecular Diagnostics, Sun Yat-sen Cancer Center, Sun Yat-sen University Guangzhou, P. R. China.,State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, 71067Sun Yat-sen University Cancer Center Guangzhou, P. R. China
| | - Kun-Yin Qiu
- Department of Children's Neuroendocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University Guangzhou, P. R. China.,Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong High Education Institutes, Sun Yat-sen University Guangzhou, P. R. China
| | - Xiao-Juan Li
- Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong High Education Institutes, Sun Yat-sen University Guangzhou, P. R. China.,Department of Research and Molecular Diagnostics, Sun Yat-sen Memorial Hospital, Sun Yat-sen University Guangzhou, P. R. China
| | - Dan-Xia Tang
- Department of Children's Neuroendocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University Guangzhou, P. R. China.,Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong High Education Institutes, Sun Yat-sen University Guangzhou, P. R. China
| | - Zhe Meng
- Department of Children's Neuroendocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University Guangzhou, P. R. China.,Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong High Education Institutes, Sun Yat-sen University Guangzhou, P. R. China
| | - Zhan-Wen He
- Department of Children's Neuroendocrinology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University Guangzhou, P. R. China.,Key Laboratory of Malignant Tumor Gene Regulation and Target Therapy of Guangdong High Education Institutes, Sun Yat-sen University Guangzhou, P. R. China
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17
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Protein kinase CK2: a potential therapeutic target for diverse human diseases. Signal Transduct Target Ther 2021; 6:183. [PMID: 33994545 PMCID: PMC8126563 DOI: 10.1038/s41392-021-00567-7] [Citation(s) in RCA: 139] [Impact Index Per Article: 46.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 03/19/2021] [Accepted: 03/22/2021] [Indexed: 02/04/2023] Open
Abstract
CK2 is a constitutively active Ser/Thr protein kinase, which phosphorylates hundreds of substrates, controls several signaling pathways, and is implicated in a plethora of human diseases. Its best documented role is in cancer, where it regulates practically all malignant hallmarks. Other well-known functions of CK2 are in human infections; in particular, several viruses exploit host cell CK2 for their life cycle. Very recently, also SARS-CoV-2, the virus responsible for the COVID-19 pandemic, has been found to enhance CK2 activity and to induce the phosphorylation of several CK2 substrates (either viral and host proteins). CK2 is also considered an emerging target for neurological diseases, inflammation and autoimmune disorders, diverse ophthalmic pathologies, diabetes, and obesity. In addition, CK2 activity has been associated with cardiovascular diseases, as cardiac ischemia-reperfusion injury, atherosclerosis, and cardiac hypertrophy. The hypothesis of considering CK2 inhibition for cystic fibrosis therapies has been also entertained for many years. Moreover, psychiatric disorders and syndromes due to CK2 mutations have been recently identified. On these bases, CK2 is emerging as an increasingly attractive target in various fields of human medicine, with the advantage that several very specific and effective inhibitors are already available. Here, we review the literature on CK2 implication in different human pathologies and evaluate its potential as a pharmacological target in the light of the most recent findings.
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18
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Dominguez I, Cruz-Gamero JM, Corasolla V, Dacher N, Rangasamy S, Urbani A, Narayanan V, Rebholz H. Okur-Chung neurodevelopmental syndrome-linked CK2α variants have reduced kinase activity. Hum Genet 2021; 140:1077-1096. [PMID: 33944995 DOI: 10.1007/s00439-021-02280-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2021] [Accepted: 03/31/2021] [Indexed: 12/22/2022]
Abstract
The Okur-Chung neurodevelopmental syndrome, or OCNDS, is a newly discovered rare neurodevelopmental disorder. It is characterized by developmental delay, intellectual disability, behavioral problems (hyperactivity, repetitive movements and social interaction deficits), hypotonia, epilepsy and language/verbalization deficits. OCNDS is linked to de novo mutations in CSNK2A1, that lead to missense or deletion/truncating variants in the encoded protein, the protein kinase CK2α. Eighteen different missense CK2α mutations have been identified to date; however, no biochemical or cell biological studies have yet been performed to clarify the functional impact of such mutations. Here, we show that 15 different missense CK2α mutations lead to varying degrees of loss of kinase activity as recombinant purified proteins and when mutants are ectopically expressed in mammalian cells. We further detect changes in the phosphoproteome of three patient-derived fibroblast lines and show that the subcellular localization of CK2α is altered for some of the OCNDS-linked variants and in patient-derived fibroblasts. Our data argue that reduced kinase activity and abnormal localization of CK2α may underlie the OCNDS phenotype.
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Affiliation(s)
- I Dominguez
- Department of Medicine, Boston University School of Medicine, Boston, MA, 02118, USA
| | - J M Cruz-Gamero
- Institut de Psychiatrie et Neurosciences de Paris (IPNP), UMR S1266, INSERM, Université de Paris, Paris, France
| | - V Corasolla
- Laboratorio di Proteomica e Metabonomica, CERC-Fondazione S.Lucia, Via del Fosso di Fiorano 64, 00143, Roma, Italy
| | - N Dacher
- Institut de Psychiatrie et Neurosciences de Paris (IPNP), UMR S1266, INSERM, Université de Paris, Paris, France
| | - S Rangasamy
- Translational Genomics Research Institute (TGen), Phoenix, AZ, 85004, USA
| | - A Urbani
- Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168, Roma, Italy.,Fondazione Policlinico Universitario A. Gemelli-IRCCS, 00168, Roma, Italy
| | - V Narayanan
- Translational Genomics Research Institute (TGen), Phoenix, AZ, 85004, USA
| | - H Rebholz
- Institut de Psychiatrie et Neurosciences de Paris (IPNP), UMR S1266, INSERM, Université de Paris, Paris, France. .,Dipartimento di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, Largo Francesco Vito 1, 00168, Roma, Italy. .,GHU Psychiatrie et Neurosciences, Paris, France. .,Center of Neurodegeneration, Faculty of Medicine, Danube Private University, Krems, Austria.
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A complex of distal appendage-associated kinases linked to human disease regulates ciliary trafficking and stability. Proc Natl Acad Sci U S A 2021; 118:2018740118. [PMID: 33846249 PMCID: PMC8072220 DOI: 10.1073/pnas.2018740118] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Primary cilia (PC) are sensory organelles essential for the development and maintenance of adult tissues. Accordingly, dysfunction of PC causes human disorders called ciliopathies. Hence, a thorough understanding of the molecular regulation of PC is critical. Our findings highlight CSNK2A1 as a modulator of cilia trafficking and stability, tightly related to TTBK2 function. Enriched at the centrosome, CSNK2A1 prevents abnormal accumulation of key ciliary proteins, instability at the tip, and aberrant activation of the Sonic Hedgehog pathway. Furthermore, we establish that Csnk2a1 mutations associated with Okur-Chung neurodevelopmental disorder (OCNDS) alter cilia morphology. Thus, we report a potential linkage between CSNK2A1 ciliary function and OCNDS. Cilia biogenesis is a complex, multistep process involving the coordination of multiple cellular trafficking pathways. Despite the importance of ciliogenesis in mediating the cellular response to cues from the microenvironment, we have only a limited understanding of the regulation of cilium assembly. We previously identified Tau tubulin kinase 2 (TTBK2) as a key regulator of ciliogenesis. Here, using CRISPR kinome and biotin identification screening, we identify the CK2 catalytic subunit CSNK2A1 as an important modulator of TTBK2 function in cilia trafficking. Superresolution microscopy reveals that CSNK2A1 is a centrosomal protein concentrated at the mother centriole and associated with the distal appendages. Csnk2a1 mutant cilia are longer than those of control cells, showing instability at the tip associated with ciliary actin cytoskeleton changes. These cilia also abnormally accumulate key cilia assembly and SHH-related proteins. De novo mutations of Csnk2a1 were recently linked to the human genetic disorder Okur-Chung neurodevelopmental syndrome (OCNDS). Consistent with the role of CSNK2A1 in cilium stability, we find that expression of OCNDS-associated Csnk2a1 variants in wild-type cells causes ciliary structural defects. Our findings provide insights into mechanisms involved in ciliary length regulation, trafficking, and stability that in turn shed light on the significance of cilia instability in human disease.
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20
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Xu S, Lian Q, Wu J, Li L, Song J. Dual molecular diagnosis of tricho-rhino-phalangeal syndrome type I and Okur-Chung neurodevelopmental syndrome in one Chinese patient: a case report. BMC MEDICAL GENETICS 2020; 21:158. [PMID: 32746809 PMCID: PMC7398275 DOI: 10.1186/s12881-020-01096-w] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Accepted: 07/26/2020] [Indexed: 11/30/2022]
Abstract
Background Okur-Chung neurodevelopmental syndrome (OCNDS) and tricho-rhino-phalangeal syndrome type I (TRPSI) are rare Mendelian diseases. OCNDS is caused by CSNK2A1 gene variants and TRPSI is caused by the TRPS1gene. However, to have two Mendelian diseases in one patient is even rarer. Case presentation A 6-year-10-month-old boy characterized by special facial features, short stature and mental retardation was referred to our pediatric endocrinology department. Whole-exome sequencing (WES) was done to detect the molecular basis of his disease. This patient was confirmed to carry two variants in the CSNK2A1 gene and one in the TRPS1 gene. The variant in the CSNK2A1 gene was vertically transmitted from his father, and the variant in TRPS1 gene from his mother. These two variants are classified as pathogenic and the causes of the presentation in this child. This patient’s father and mother have subsequently been diagnosed as having OCNDS and TRPSI respectively. Conclusion This is the first reported case of a dual molecular diagnosis of tricho-rhino-phalangeal syndrome type I and Okur-Chung neurodevelopmental syndrome in the same patient. This patient is the first published example of vertical transmission of this recurrent CSN2A1 variant from parent to child. A novel variant in the TRPS1 gene that is pathogenic was also identified. In conclusion, identification of the variants in this patient expands the phenotypes and molecular basis of dual Mendelian diseases.
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Affiliation(s)
- Shanshan Xu
- Department of Pediatrics, The First Affiliated Hospital of Xiamen University, No.55 Zhenhai Road, Xiamen, 316003, Fujian Province, China.,Pediatric Key Laboratory of Xiamen, No.55 Zhenhai Road, Xiamen, 361003, China.,Institute of Pediatrics, School of Medicine, Xiamen University, No.55 Zhenhai Road, Xiamen, 361003, China
| | - Qun Lian
- Department of Pediatrics, The First Affiliated Hospital of Xiamen University, No.55 Zhenhai Road, Xiamen, 316003, Fujian Province, China. .,Pediatric Key Laboratory of Xiamen, No.55 Zhenhai Road, Xiamen, 361003, China. .,Institute of Pediatrics, School of Medicine, Xiamen University, No.55 Zhenhai Road, Xiamen, 361003, China.
| | - Jinzhun Wu
- Department of Pediatrics, The First Affiliated Hospital of Xiamen University, No.55 Zhenhai Road, Xiamen, 316003, Fujian Province, China.,Pediatric Key Laboratory of Xiamen, No.55 Zhenhai Road, Xiamen, 361003, China.,Institute of Pediatrics, School of Medicine, Xiamen University, No.55 Zhenhai Road, Xiamen, 361003, China
| | - Lingli Li
- Department of Pediatrics, The First Affiliated Hospital of Xiamen University, No.55 Zhenhai Road, Xiamen, 316003, Fujian Province, China.,Pediatric Key Laboratory of Xiamen, No.55 Zhenhai Road, Xiamen, 361003, China.,Institute of Pediatrics, School of Medicine, Xiamen University, No.55 Zhenhai Road, Xiamen, 361003, China
| | - Jia Song
- Department of Pediatrics, The First Affiliated Hospital of Xiamen University, No.55 Zhenhai Road, Xiamen, 316003, Fujian Province, China.,Pediatric Key Laboratory of Xiamen, No.55 Zhenhai Road, Xiamen, 361003, China.,Institute of Pediatrics, School of Medicine, Xiamen University, No.55 Zhenhai Road, Xiamen, 361003, China
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21
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Overrepresentation of genetic variation in the AnkyrinG interactome is related to a range of neurodevelopmental disorders. Eur J Hum Genet 2020; 28:1726-1733. [PMID: 32651551 DOI: 10.1038/s41431-020-0682-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 05/28/2020] [Accepted: 06/15/2020] [Indexed: 12/30/2022] Open
Abstract
Upon the discovery of numerous genes involved in the pathogenesis of neurodevelopmental disorders, several studies showed that a significant proportion of these genes converge on common pathways and protein networks. Here, we used a reversed approach, by screening the AnkyrinG protein-protein interaction network for genetic variation in a large cohort of 1009 cases with neurodevelopmental disorders. We identified a significant enrichment of de novo potentially disease-causing variants in this network, confirming that this protein network plays an important role in the emergence of several neurodevelopmental disorders.
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22
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Nakashima M, Tohyama J, Nakagawa E, Watanabe Y, Siew CG, Kwong CS, Yamoto K, Hiraide T, Fukuda T, Kaname T, Nakabayashi K, Hata K, Ogata T, Saitsu H, Matsumoto N. Identification of de novo CSNK2A1 and CSNK2B variants in cases of global developmental delay with seizures. J Hum Genet 2019; 64:313-322. [PMID: 30655572 DOI: 10.1038/s10038-018-0559-z] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 12/18/2018] [Accepted: 12/27/2018] [Indexed: 12/22/2022]
Abstract
Casein kinase 2 (CK2) is a serine threonine kinase ubiquitously expressed in eukaryotic cells and involved in various cellular processes. In recent studies, de novo variants in CSNK2A1 and CSNK2B, which encode the subunits of CK2, have been identified in individuals with intellectual disability syndrome. In this study, we describe four patients with neurodevelopmental disorders possessing de novo variants in CSNK2A1 or CSNK2B. Using whole-exome sequencing, we detected two de novo variants in CSNK2A1 in two unrelated Japanese patients, a novel variant c.571C>T, p.(Arg191*) and a recurrent variant c.593A>G, p.(Lys198Arg), and two novel de novo variants in CSNK2B in Japanese and Malaysian patients, c.494A>G, p.(His165Arg) and c.533_534insGT, p.(Pro179Tyrfs*49), respectively. All four patients showed mild to profound intellectual disabilities, developmental delays, and various types of seizures. This and previous studies have found a total of 20 CSNK2A1 variants in 28 individuals with syndromic intellectual disability. The hotspot variant c.593A>G, p.(Lys198Arg) was found in eight of 28 patients. Meanwhile, only five CSNK2B variants were identified in five individuals with neurodevelopmental disorders. We reviewed the previous literature to verify the phenotypic spectrum of CSNK2A1- and CSNK2B-related syndromes.
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Affiliation(s)
- Mitsuko Nakashima
- Department of Biochemistry, Hamamatsu University School of Medicine, Hamamatsu, Japan. .,Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan.
| | - Jun Tohyama
- Department of Child Neurology, Nishi-Niigata Chuo National Hospital, Niigata, Japan
| | - Eiji Nakagawa
- Department of Child Neurology, National Center Hospital, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Yoshihiro Watanabe
- Department of Pediatrics, Yokohama City University Medical Center, Yokohama, Japan
| | - Ch'ng Gaik Siew
- Department of Genetics, Kuala Lumpur Hospital, Kuala Lumpur, Malaysia
| | - Chieng Siik Kwong
- Department of Pediatrics, Sarawak General Hospital, Sarawak, Malaysia
| | - Kaori Yamoto
- Department of Pediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Takuya Hiraide
- Department of Pediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Tokiko Fukuda
- Department of Pediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Tadashi Kaname
- Department of Genome Medicine, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Kazuhiko Nakabayashi
- Department of Maternal-Fetal Biology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Kenichiro Hata
- Department of Maternal-Fetal Biology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Tsutomu Ogata
- Department of Pediatrics, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Hirotomo Saitsu
- Department of Biochemistry, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Naomichi Matsumoto
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan.
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