1. Deleterious, protein-altering variants in the X-linked transcriptional coregulator ZMYM3 in 22 individuals with a neurodevelopmental delay phenotype
- Author
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Susan M. Hiatt, Slavica Trajkova, Matteo Rossi Sebastiano, E. Christopher Partridge, Fatima E. Abidi, Ashlyn Anderson, Muhammad Ansar, Stylianos E. Antonarakis, Azadeh Azadi, Ruxandra Bachmann-Gagescu, Andrea Bartuli, Caroline Benech, Jennifer L. Berkowitz, Michael J. Betti, Alfredo Brusco, Ashley Cannon, Giulia Caron, Yanmin Chen, Molly M. Crenshaw, Laurence Cuisset, Cynthia J. Curry, Hossein Darvish, Serwet Demirdas, Maria Descartes, Jessica Douglas, David A. Dyment, Houda Zghal Elloumi, Giuseppe Ermondi, Marie Faoucher, Emily G. Farrow, Stephanie A. Felker, Heather Fisher, Anna C. E. Hurst, Pascal Joset, Stanislav Kmoch, Benjamin R. Leadem, Marina Macchiaiolo, Martin Magner, Giorgia Mandrile, Francesca Mattioli, Megan McEown, Sarah K. Meadows, Livija Medne, Naomi J. L. Meeks, Sarah Montgomery, Melanie P. Napier, Marvin Natowicz, Kimberly M. Newberry, Marcello Niceta, Lenka Noskova, Catherine Nowak, Amanda G. Noyes, Matthew Osmond, Verdiana Pullano, Chloé Quélin, Simin Rahimi-Aliabadi, Anita Rauch, Sylvia Redon, Alexandre Reymond, Caitlin R. Schwager, Elizabeth A. Sellars, Angela Scheuerle, Elena Shukarova-Angelovska, Cara Skraban, Bonnie R. Sullivan, Marco Tartaglia, Isabelle Thiffault, Kevin Uguen, Luis A. Umaña, Yolande van Bever, Saskia N. van der Crabben, Marjon A. van Slegtenhorst, Quinten Waisfisz, Richard M. Myers, and Gregory M. Cooper
- Abstract
Neurodevelopmental disorders (NDDs) often result from highly penetrant variation in one of many genes, including genes not yet characterized. Using the MatchMaker Exchange, we assembled a cohort of 22 individuals with rare, protein-altering variation in the X-linked transcriptional coregulator gene ZMYM3. Most (n=19) individuals were males; 15 males had maternally-inherited alleles, three of the variants in males arose de novo, and one had unknown inheritance. Overlapping features included developmental delay, intellectual disability, behavioral abnormalities, and a specific facial gestalt in a subset of males. Variants in almost all individuals (n=21) are missense, two of which are recurrent. Three unrelated males were identified with inherited variation at R441, a site at which variation has been previously reported in NDD-affected males, and two individuals have de novo variation at R1294. All variants affect evolutionarily conserved sites, and most are predicted to damage protein structure or function. ZMYM3 is relatively intolerant to variation in the general population, is highly expressed in the brain, and encodes a component of the KDM1A-RCOR1 chromatin-modifying complex. ChIP-seq experiments on one mutant, ZMYM3R1274W, indicate dramatically reduced genomic occupancy, supporting a hypomorphic effect. While we are unable to perform statistical evaluations to support a conclusive causative role for variation in ZMYM3 in disease, the totality of the evidence, including the presence of recurrent variation, overlapping phenotypic features, protein-modeling data, evolutionary constraint, and experimentally-confirmed functional effects, strongly supports ZMYM3 as a novel NDD gene.
- Published
- 2022