An autosomal-dominant childhood-onset disorder associated with pathogenic variants in VCP

Annelise Y. Mah-Som, Jil Daw, Diana Huynh, Mengcheng Wu, Benjamin C. Creekmore, William Burns, Steven A. Skinner, Øystein L. Holla, Marie F. Smeland, Marc Planes, Kevin Uguen, Sylvia Redon, Tatjana Bierhals, Tasja Scholz, Jonas Denecke, Martin A. Mensah, Henrike L. Sczakiel, Heidelis Tichy, Sarah Verheyen, Jasmin BlattererElisabeth Schreiner, Jenny Thies, Christina Lam, Christine G. Spaeth, Loren Pena, Keri Ramsey, Vinodh Narayanan, Laurie H. Seaver, Diana Rodriguez, Alexandra Afenjar, Lydie Burglen, Edward B. Lee, Tsui Fen Chou, Conrad C. Weihl, Marwan S. Shinawi

Research output: Contribution to journalArticlepeer-review

Abstract

Valosin-containing protein (VCP) is an AAA+ ATPase that plays critical roles in multiple ubiquitin-dependent cellular processes. Dominant pathogenic variants in VCP are associated with adult-onset multisystem proteinopathy (MSP), which manifests as myopathy, bone disease, dementia, and/or motor neuron disease. Through GeneMatcher, we identified 13 unrelated individuals who harbor heterozygous VCP variants (12 de novo and 1 inherited) associated with a childhood-onset disorder characterized by developmental delay, intellectual disability, hypotonia, and macrocephaly. Trio exome sequencing or a multigene panel identified nine missense variants, two in-frame deletions, one frameshift, and one splicing variant. We performed in vitro functional studies and in silico modeling to investigate the impact of these variants on protein function. In contrast to MSP variants, most missense variants had decreased ATPase activity, and one caused hyperactivation. Other variants were predicted to cause haploinsufficiency, suggesting a loss-of-function mechanism. This cohort expands the spectrum of VCP-related disease to include neurodevelopmental disease presenting in childhood.

Original languageEnglish
Pages (from-to)1959-1975
Number of pages17
JournalAmerican journal of human genetics
Volume110
Issue number11
DOIs
StatePublished - Nov 2 2023

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