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CNKSR2 interactome analysis indicates its association with the centrosome/microtubule system

Neural Regeneration Research 2025年第8期20卷 2420-2432页

作者： Lin Yin Yalan Xu Jie Mu Yu Leng Lei Ma Yu Zheng Ruizhi Li Yin Wang Peifeng Li Hai Zhu Dong Wang Jing Li Institute for Translational Medicine The Affiliated Hospital of Qingdao UniversityMedical CollegeQingdao UniversityQingdaoShandong ProvinceChina School of Basic Medicine Qingdao UniversityQingdaoShandong ProvinceChina College of Life Sciences and School of PharmacyMedical CollegeQingdao UniversityQingdaoShandong ProvinceChina Department of Urology Qingdao Municipal Hospital Affiliated to Qingdao UniversityQingdaoShandong ProvinceChina

The protein connector enhancer of kinase suppressor of Ras 2(CNKSR2),present in both the postsynaptic density and cytoplasm of neurons,is a scaffolding protein with several protein-binding *** of the CNKSR2 gene have been implicated in neurodevelopmental disorders,particularly intellectual disability,although the precise mechanism involved has not yet been fully *** has demonstrated that CNKSR2 plays a role in facilitating the localization of postsynaptic density protein complexes to the membrane,thereby influencing synaptic signaling and the morphogenesis of dendritic ***,the function of CNKSR2 in the cytoplasm remains to be *** this study,we used immunoprecipitation and high-resolution liquid chromatography-mass spectrometry to identify the interactors of *** a combination of bioinformatic analysis and cytological experiments,we found that the CNKSR2 interactors were significantly enriched in the proteome of the *** also showed that CNKSR2 interacted with the microtubule protein DYNC1H1 and with the centrosome marker *** colocalization analysis confirmed the centrosomal localization of *** we downregulated CNKSR2 expression in mouse neuroblastoma cells(Neuro 2A),we observed significant changes in the expression of numerous centrosomal *** manipulation also affected centrosome-related functions,including cell size and shape,cell proliferation,and ***,we found that CNKSR2 interactors were highly enriched in de novo variants associated with intellectual disability and autism spectrum *** findings establish a connection between CNKSR2 and the centrosome,and offer new insights into the underlying mechanisms of neurodevelopmental disorders.

关键词： autism spectrum disorder centrosome CNKSR2 intellectual disability interactome mass spectrometry microtubule neurodevelopmental disease protein complexes protein-protein interactions

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Developmental regulation of neuronal gene expression by Elongator complex protein 1 dosage

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Journal of Genetics and Genomics 2022年第7期49卷 654-665页

作者： Elisabetta Morini Dadi Gao Emily M.Logan Monica Salani Aram J.Krauson Anil Chekuri Yei-Tsung Chen Ashok Ragavendran Probir Chakravarty Serkan Erdin Alexei Stortchevoi Jesper Q.Svejstrup Michael E.Talkowski Susan A.Slaugenhaupt Center for Genomic Medicine Massachusetts General Hospital Research InstituteBostonMAUSA Department of Neurology Massachusetts General Hospital Research Institute and Harvard Medical SchoolBostonMAUSA Program in Medical and Population Genetics and Stanley Center for Psychiatric Research Broad Institute of Harvard and MITCambridgeMAUSA Department of Life Sciences and Institute of Genome Sciences National Yang Ming Chiao Tung UniversityTaiwanChina Bioinformatics and Biostatistics The Francis Crick InstituteLondonUK Mechanisms of Transcription Laboratory The Francis Crick InstituteLondonUK Department of Cellular and Molecular Medicine Panum InstituteUniversity of CopenhagenCopenhagenDenmark

Familial dysautonomia(FD), a hereditary sensory and autonomic neuropathy, is caused by a mutation in the Elongator complex protein 1(ELP1) gene that leads to a tissue-specific reduction of ELP1 protein. Our work to generate a phenotypic mouse model for FD headed to the discovery that homozygous deletion of the mouse Elp1 gene leads to embryonic lethality prior to mid-gestation. Given that FD is caused by a reduction, not loss, of ELP1, we generated two new mouse models by introducing different copy numbers of the human FD ELP1 transgene into the Elp1 knockout mouse(Elp1) and observed that human ELP1 expression rescues embryonic development in a dose-dependent manner. We then conducted a comprehensive transcriptome analysis in mouse embryos to identify genes and pathways whose expression correlates with the amount of ELP1. We found that ELP1 is essential for the expression of genes responsible for nervous system development. Further, gene length analysis of the differentially expressed genes showed that the loss of Elp1 mainly impacts the expression of long genes and that by gradually restoring Elongator, their expression is progressively rescued. Finally, through evaluation of co-expression modules, we identified gene sets with unique expression patterns that depended on ELP1 expression.

关键词： ELP1 Elongator Transcriptional elongation Familial dysautonomia neurodevelopmental disease

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