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An intellectual-disability-associated mutation of the transcriptional regulator NACC1 impairs glutamatergic neurotransmission
Advances in genome sequencing technologies have favored the identification of rare de novo mutations linked to neurological disorders in humans. Recently, a de novo autosomal dominant mutation in NACC1 was identified (NM_052876.3: c.892C > T, NP_443108.1; p.Arg298Trp), associated with severe neur...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Frontiers Media S.A.
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10393139/ https://www.ncbi.nlm.nih.gov/pubmed/37533751 http://dx.doi.org/10.3389/fnmol.2023.1115880 |
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author | Daniel, James A. Elizarova, Sofia Shaib, Ali H. Chouaib, Abed A. Magnussen, Helge M. Wang, Jianlong Brose, Nils Rhee, JeongSeop Tirard, Marilyn |
author_facet | Daniel, James A. Elizarova, Sofia Shaib, Ali H. Chouaib, Abed A. Magnussen, Helge M. Wang, Jianlong Brose, Nils Rhee, JeongSeop Tirard, Marilyn |
author_sort | Daniel, James A. |
collection | PubMed |
description | Advances in genome sequencing technologies have favored the identification of rare de novo mutations linked to neurological disorders in humans. Recently, a de novo autosomal dominant mutation in NACC1 was identified (NM_052876.3: c.892C > T, NP_443108.1; p.Arg298Trp), associated with severe neurological symptoms including intellectual disability, microcephaly, and epilepsy. As NACC1 had never before been associated with neurological diseases, we investigated how this mutation might lead to altered brain function. We examined neurotransmission in autaptic glutamatergic mouse neurons expressing the murine homolog of the human mutant NACC1, i.e., Nacc1-R284W. We observed that expression of Nacc1-R284W impaired glutamatergic neurotransmission in a cell-autonomous manner, likely through a dominant negative mechanism. Furthermore, by screening for Nacc1 interaction targets in the brain, we identified SynGAP1, GluK2A, and several SUMO E3 ligases as novel Nacc1 interaction partners. At a biochemical level, Nacc1-R284W exhibited reduced binding to SynGAP1 and GluK2A, and also showed greatly increased SUMOylation. Ablating the SUMOylation of Nacc1-R284W partially restored its interaction with SynGAP1 but did not restore binding to GluK2A. Overall, these data indicate a role for Nacc1 in regulating glutamatergic neurotransmission, which is substantially impaired by the expression of a disease-associated Nacc1 mutant. This study provides the first functional insights into potential deficits in neuronal function in patients expressing the de novo mutant NACC1 protein. |
format | Online Article Text |
id | pubmed-10393139 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-103931392023-08-02 An intellectual-disability-associated mutation of the transcriptional regulator NACC1 impairs glutamatergic neurotransmission Daniel, James A. Elizarova, Sofia Shaib, Ali H. Chouaib, Abed A. Magnussen, Helge M. Wang, Jianlong Brose, Nils Rhee, JeongSeop Tirard, Marilyn Front Mol Neurosci Molecular Neuroscience Advances in genome sequencing technologies have favored the identification of rare de novo mutations linked to neurological disorders in humans. Recently, a de novo autosomal dominant mutation in NACC1 was identified (NM_052876.3: c.892C > T, NP_443108.1; p.Arg298Trp), associated with severe neurological symptoms including intellectual disability, microcephaly, and epilepsy. As NACC1 had never before been associated with neurological diseases, we investigated how this mutation might lead to altered brain function. We examined neurotransmission in autaptic glutamatergic mouse neurons expressing the murine homolog of the human mutant NACC1, i.e., Nacc1-R284W. We observed that expression of Nacc1-R284W impaired glutamatergic neurotransmission in a cell-autonomous manner, likely through a dominant negative mechanism. Furthermore, by screening for Nacc1 interaction targets in the brain, we identified SynGAP1, GluK2A, and several SUMO E3 ligases as novel Nacc1 interaction partners. At a biochemical level, Nacc1-R284W exhibited reduced binding to SynGAP1 and GluK2A, and also showed greatly increased SUMOylation. Ablating the SUMOylation of Nacc1-R284W partially restored its interaction with SynGAP1 but did not restore binding to GluK2A. Overall, these data indicate a role for Nacc1 in regulating glutamatergic neurotransmission, which is substantially impaired by the expression of a disease-associated Nacc1 mutant. This study provides the first functional insights into potential deficits in neuronal function in patients expressing the de novo mutant NACC1 protein. Frontiers Media S.A. 2023-07-14 /pmc/articles/PMC10393139/ /pubmed/37533751 http://dx.doi.org/10.3389/fnmol.2023.1115880 Text en Copyright © 2023 Daniel, Elizarova, Shaib, Chouaib, Magnussen, Wang, Brose, Rhee and Tirard. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Molecular Neuroscience Daniel, James A. Elizarova, Sofia Shaib, Ali H. Chouaib, Abed A. Magnussen, Helge M. Wang, Jianlong Brose, Nils Rhee, JeongSeop Tirard, Marilyn An intellectual-disability-associated mutation of the transcriptional regulator NACC1 impairs glutamatergic neurotransmission |
title | An intellectual-disability-associated mutation of the transcriptional regulator NACC1 impairs glutamatergic neurotransmission |
title_full | An intellectual-disability-associated mutation of the transcriptional regulator NACC1 impairs glutamatergic neurotransmission |
title_fullStr | An intellectual-disability-associated mutation of the transcriptional regulator NACC1 impairs glutamatergic neurotransmission |
title_full_unstemmed | An intellectual-disability-associated mutation of the transcriptional regulator NACC1 impairs glutamatergic neurotransmission |
title_short | An intellectual-disability-associated mutation of the transcriptional regulator NACC1 impairs glutamatergic neurotransmission |
title_sort | intellectual-disability-associated mutation of the transcriptional regulator nacc1 impairs glutamatergic neurotransmission |
topic | Molecular Neuroscience |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10393139/ https://www.ncbi.nlm.nih.gov/pubmed/37533751 http://dx.doi.org/10.3389/fnmol.2023.1115880 |
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