Deletion of TOP3β, a component of FMRP-containing mRNPs, contributes to neurodevelopmental disorders.

Deletion of TOP3β, a component of FMRP-containing mRNPs, contributes to neurodevelopmental disorders.
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DOI:
10.1038/nn.3484
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发表时间:
2013-09
影响因子:
25
通讯作者:
Palotie, Aarno
Palotie, Aarno
中科院分区:
医学1区
文献类型:
--
作者:
Stoll, Georg;Pietilainen, Olli P. H.;Linder, Bastian;Suvisaari, Jaana;Brosi, Cornelia;Hennah, William;Leppa, Virpi;Torniainen, Minna;Ripatti, Samuli;Ala-Mello, Sirpa;Plottner, Oliver;Rehnstrom, Karola;Tuulio-Henriksson, Annamari;Varilo, Teppo;Tallila, Jonna;Kristiansson, Kati;Isohanni, Matti;Kaprio, Jaakko;Eriksson, Johan G.;Raitakari, Olli T.;Lehtimaki, Terho;Jarvelin, Marjo-Riitta;Salomaa, Veikko;Hurles, Matthew;Stefansson, Hreinn;Peltonen, Leena;Sullivan, Patrick F.;Paunio, Tiina;Lonnqvist, Jouko;Daly, Mark J.;Fischer, Utz;Freimer, Nelson B.;Palotie, Aarno

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将特定基因与复杂的大脑和行为表型的产生联系起来需要多方面的证据。大多数具有重大影响的基因变异很罕见,这通常使得无法积累它们与某一特定性状相关的统计证据。我们在此表明,在一个近期扩张的芬兰北部亚隔离群体中,罕见的22号染色体22q11.22缺失的富集使得能够检测到TOP3β与精神分裂症和认知障碍之间的关联。对TOP3β的生化分析显示,这种拓扑异构酶是胞质信使核糖核蛋白(mRNPs)的一个组成部分,并且对RNA具有催化活性。TOP3β被招募到mRNPs不依赖于RNA顺式元件,并且与FMRP(脆性X智力低下综合征(FXS)中的致病基因产物)的共同招募相关联。因此,我们揭示了TOP3β在mRNA代谢中的一种新作用,并提供了几方面的证据表明它与神经发育障碍有关。
Implicating particular genes in the generation of complex brain and behavior phenotypes requires multiple lines of evidence. The rarity of most high impact genetic variants typically precludes the possibility of accruing statistical evidence that they are associated with a given trait. We show here that the enrichment of a rare Chromosome 22q11.22 deletion in a recently expanded Northern Finnish sub-isolate enables the detection of association between TOP3β and both schizophrenia and cognitive impairment. Biochemical analysis of TOP3β revealed that this topoisomerase is a component of cytosolic messenger ribonucleoproteins (mRNPs) and is catalytically active on RNA. The recruitment of TOP3β to mRNPs was independent of RNA cis-elements and was coupled to the co-recruitment of FMRP, the disease gene product in fragile X mental retardation syndrome (FXS). Thus, we uncover a novel role for TOP3β in mRNA metabolism and provide several lines of evidence implicating it in neurodevelopmental disorders.
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