Paralog Studies Augment Gene Discovery: DDX and DHX Genes

Paine, I., Posey, J. E., Grochowski, C. M., Jhangiani, S. N., Rosenheck, S., Kleyner, R., Marmorale, T., Yoon, M., Wang, K., Robison, R., Cappuccio, G., Pinelli, M., Magli, A., Coban Akdemir, Z., Hui, J., Yeung, W. L., Wong, B. K. Y., Ortega, L., Bekheirnia, M. R., Bierhals, T., Hempel, M., Johannsen, J., Santer, R., Aktas, D., Alikasifoglu, M., Bozdogan, S., Aydin, H., Karaca, E., Bayram, Y., Ityel, H., Dorschner, M., White, J. J., Wilichowski, E., Wortmann, S. B., Casella, E. B., Kitajima, J. P., Kok, F., Monteiro, F., Muzny, D. M., Bamshad, M., Gibbs, R. A., Sutton, V. R., Van Esch, H., Brunetti-Pierri, N., Hildebrandt, F., Brautbar, A., Van den Veyver, I. B., Glass, I., Lessel, D., Lyon, G. J., Lupski, J. R. (June 2019) Paralog Studies Augment Gene Discovery: DDX and DHX Genes. Am J Hum Genet, 105 (2). pp. 302-316. ISSN 0002-9297

URL: https://www.ncbi.nlm.nih.gov/pubmed/31256877
DOI: 10.1016/j.ajhg.2019.06.001

Abstract

Members of a paralogous gene family in which variation in one gene is known to cause disease are eight times more likely to also be associated with human disease. Recent studies have elucidated DHX30 and DDX3X as genes for which pathogenic variant alleles are involved in neurodevelopmental disorders. We hypothesized that variants in paralogous genes encoding members of the DExD/H-box RNA helicase superfamily might also underlie developmental delay and/or intellectual disability (DD and/or ID) disease phenotypes. Here we describe 15 unrelated individuals who have DD and/or ID, central nervous system (CNS) dysfunction, vertebral anomalies, and dysmorphic features and were found to have probably damaging variants in DExD/H-box RNA helicase genes. In addition, these individuals exhibit a variety of other tissue and organ system involvement including ocular, outer ear, hearing, cardiac, and kidney tissues. Five individuals with homozygous (one), compound-heterozygous (two), or de novo (two) missense variants in DHX37 were identified by exome sequencing. We identified ten total individuals with missense variants in three other DDX/DHX paralogs: DHX16 (four individuals), DDX54 (three individuals), and DHX34 (three individuals). Most identified variants are rare, predicted to be damaging, and occur at conserved amino acid residues. Taken together, these 15 individuals implicate the DExD/H-box helicases in both dominantly and recessively inherited neurodevelopmental phenotypes and highlight the potential for more than one disease mechanism underlying these disorders.

Item Type: Paper
Subjects: bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > enzymes > helicase
CSHL Authors:
Communities: CSHL labs > Lyon lab
Depositing User: Matthew Dunn
Date: 26 June 2019
Date Deposited: 29 Jul 2019 15:20
Last Modified: 12 Aug 2019 16:44
Related URLs:
URI: http://repository.cshl.edu/id/eprint/38145

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