Copy number variations in the NF1 gene region are infrequent and do not predispose to recurrent type-1 deletions

European Journal of Human Genetics : EJHG
Katharina SteinmannHildegard Kehrer-Sawatzki

Abstract

Gross deletions of the NF1 gene at 17q11.2 belong to the group of 'genomic disorders' characterized by local sequence architecture that predisposes to genomic rearrangements. Segmental duplications within regions associated with genomic disorders are prone to non-allelic homologous recombination (NAHR), which mediates gross rearrangements. Copy number variants (CNVs) without obvious phenotypic consequences also occur frequently in regions of genomic disorders. In the NF1 gene region, putative CNVs have been reportedly detected by array comparative genomic hybridization (array CGH). These variants include duplications and deletions within the NF1 gene itself (CNV1) and a duplication that encompasses the SUZ12 gene, the distal NF1-REPc repeat and the RHOT1 gene (CNV2). To explore the possibility that these CNVs could have played a role in promoting deletion mutagenesis in type-1 deletions (the most common type of gross NF1 deletion), non-affected transmitting parents of patients with type-1 NF1 deletions were investigated by multiplex ligation-dependent probe amplification (MLPA). However, neither CNV1 nor CNV2 were detected. This would appear to exclude these variants as frequent mediators of NAHR giving rise to type-1 deletions...Continue Reading

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Citations

Oct 30, 2012·BMC Medical Genetics·Tanja MußotterHildegard Kehrer-Sawatzki
Sep 11, 2014·Human Mutation·Hildegard Kehrer-SawatzkiLudwine Messiaen
Feb 2, 2012·Genes, Chromosomes & Cancer·Lan KluweVictor-Felix Mautner
Jan 7, 2010·Human Mutation·Angelika C RoehlHildegard Kehrer-Sawatzki
Feb 19, 2017·Human Genetics·Hildegard Kehrer-SawatzkiDavid N Cooper
Dec 2, 2020·Genes, Chromosomes & Cancer·Isabelle Vanden BemptMaria Debiec-Rychter
Jun 11, 2021·BMC Medical Genomics·Trenell J MosleyJennifer G Mulle

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