Rare deleterious de novo missense variants in Rnf2/Ring2 are associated with a neurodevelopmental disorder with unique clinical features.

Journal Article (Journal Article)

The Polycomb group (PcG) gene RNF2 (RING2) encodes a catalytic subunit of the Polycomb repressive complex 1 (PRC1), an evolutionarily conserved machinery that post-translationally modifies chromatin to maintain epigenetic transcriptional repressive states of target genes including Hox genes. Here, we describe two individuals, each with rare de novo missense variants in RNF2. Their phenotypes include intrauterine growth retardation, severe intellectual disabilities, behavioral problems, seizures, feeding difficulties and dysmorphic features. Population genomics data suggest that RNF2 is highly constrained for loss-of-function (LoF) and missense variants, and both p.R70H and p.S82R variants have not been reported to date. Structural analyses of the two alleles indicate that these changes likely impact the interaction between RNF2 and BMI1, another PRC1 subunit or its substrate Histone H2A, respectively. Finally, we provide functional data in Drosophila that these two missense variants behave as LoF alleles in vivo. The evidence provide support for deleterious alleles in RNF2 being associated with a new and recognizable genetic disorder. This tentative gene-disease association in addition to the 12 previously identified disorders caused by PcG genes attests to the importance of these chromatin regulators in Mendelian disorders.

Full Text

Duke Authors

Cited Authors

  • Luo, X; Schoch, K; Jangam, SV; Bhavana, VH; Graves, HK; Kansagra, S; Jasien, JM; Stong, N; Keren, B; Mignot, C; Ravelli, C; Undiagnosed Diseases Network, ; Bellen, HJ; Wangler, MF; Shashi, V; Yamamoto, S

Published Date

  • June 26, 2021

Published In

Volume / Issue

  • 30 / 14

Start / End Page

  • 1283 - 1292

PubMed ID

  • 33864376

Pubmed Central ID

  • PMC8255132

Electronic International Standard Serial Number (EISSN)

  • 1460-2083

Digital Object Identifier (DOI)

  • 10.1093/hmg/ddab110

Language

  • eng

Conference Location

  • England