Fiche publication
Date publication
mars 2017
Journal
American journal of human genetics
Auteurs
Membres identifiés du Cancéropôle Est :
Dr DAVIDSON Irwin
Tous les auteurs :
Tawamie H, Martianov I, Wohlfahrt N, Buchert R, Mengus G, Uebe S, Janiri L, Hirsch FW, Schumacher J, Ferrazzi F, Sticht H, Reis A, Davidson I, Colombo R, Abou Jamra R
Lien Pubmed
Résumé
In two independent consanguineous families each with two children affected by mild intellectual disability and microcephaly, we identified two homozygous missense variants (c.119T>A [p.Met40Lys] and c.92T>A [p.Leu31His]) in TATA-box-binding-protein-associated factor 13 (TAF13). Molecular modeling suggested a pathogenic effect of both variants through disruption of the interaction between TAF13 and TAF11. These two proteins form a histone-like heterodimer that is essential for their recruitment into the general RNA polymerase II transcription factor IID (TFIID) complex. Co-immunoprecipitation in HeLa cells transfected with plasmids encoding TAF11 and TAF13 revealed that both variants indeed impaired formation of the TAF13-TAF11 heterodimer, thus confirming the protein modeling analysis. To further understand the functional role of TAF13, we performed RNA sequencing of neuroblastoma cell lines upon TAF13 knockdown. The transcriptional profile showed significant deregulation of gene expression patterns with an emphasis on genes related to neuronal and skeletal functions and those containing E-box motives in their promoters. Here, we expand the spectrum of TAF-associated phenotypes and highlight the importance of TAF13 in neuronal functions.
Mots clés
RNA-seq, TAF13, exome sequencing, intellectual disability, pathogenic variant, transcription factor IID
Référence
Am. J. Hum. Genet.. 2017 Mar;100(3):555-561
