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Variants in PUS7 cause intellectual disability with speech delay, microcephaly, short stature, and aggressive behavior

de Brouwer, Arjan P.M., Abou Jamra, Rami, Körtel, Nadine, Soyris, Clara, Polla, Daniel L., Safra, Modi, Zisso, Avia, Powell, Christopher A., Rebelo-Guiomar, Pedro, Dinges, Nadja, Morin, Violeta, Stock, Michael, Hussain, Mureed, Shahzad, Mohsin, Riazuddin, Saima, Ahmed, Zubair M., Pfundt, Rolph, Schwarz, Franziska, de Boer, Lonneke, Reis, André, Grozeva, Detilina, Raymond, F. Lucy, Riazuddin, Sheikh, Koolen, David A., Minczuk, Michal, Roignant, Jean-Yves, van Bokhoven, Hans and Schwartz, Schraga 2018. Variants in PUS7 cause intellectual disability with speech delay, microcephaly, short stature, and aggressive behavior. American Journal of Human Genetics 103 (6) , pp. 1045-1052. 10.1016/j.ajhg.2018.10.026

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Abstract

We describe six persons from three families with three homozygous protein truncating variants in PUS7: c.89_90del (p.Thr30Lysfs∗20), c.1348C>T (p.Arg450∗), and a deletion of the penultimate exon 15. All these individuals have intellectual disability with speech delay, short stature, microcephaly, and aggressive behavior. PUS7 encodes the RNA-independent pseudouridylate synthase 7. Pseudouridylation is the most abundant post-transcriptional modification in RNA, which is primarily thought to stabilize secondary structures of RNA. We show that the disease-related variants lead to abolishment of PUS7 activity on both tRNA and mRNA substrates. Moreover, pus7 knockout in Drosophila melanogaster results in a number of behavioral defects, including increased activity, disorientation, and aggressiveness supporting that neurological defects are caused by PUS7 variants. Our findings demonstrate that RNA pseudouridylation by PUS7 is essential for proper neuronal development and function.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
Centre for Trials Research (CNTRR)
Publisher: Elsevier (Cell Press)
ISSN: 0002-9297
Last Modified: 06 Apr 2021 15:15
URI: https://orca.cardiff.ac.uk/id/eprint/140280

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