Mutations in NR2E3 can cause dominant or recessive retinal degenerations in the same family

Pascal Escher, Peter Gouras, Raphaël Roduit, Leila Tiab, Sylvain Bolay, Tania Delarive, Shiming Chen, Chih Cheng Tsai, Masanori Hayashi, Jana Zernant, Joanna E. Merriam, Nicolas Mermod, Rando Allikmets, Francis L. Munier, Daniel F. Schorderet

Research output: Contribution to journalArticle

42 Scopus citations

Abstract

NR2E3, a photoreceptor-specific nuclear receptor (PNR), represses cone-specific genes and activates several rod-specific genes. In humans, mutations in NR2E3 have been associated with the recessively-inherited enhanced short-wavelength sensitive S-cone syndrome (ESCS) and, recently, with autosomal dominant (ad) retinitis pigmentosa (RP) (adRP). In the present work, we describe two additional families affected by adRP that carry a heterozygous c.166 > 4A (p.G56R) mutation in the NR2E3 gene. Functional analysis determined the dominant negative activity of the p.G56R mutant protein as the molecular mechanism of adRP. Interestingly, in one pedigree, the most common causal variant for ESCS (p.R311Q) cosegregated with the adRP-linked p.G56R mutation, and the compound heterozygotes exhibited an ESCS-like phenotype, which in 1 of the 2 cases was strikingly "milder" than the patients carrying the p.G56R mutation alone. Impaired repression of cone-specific genes by the corepressors atrophin-1 (dentatorubral-pallidoluysian atrophy [DRPLA] gene product) and atrophin-2 (arginine-glutamic acid dipeptide repeat [RERE] protein) appeared to be a molecular mechanism mediating the beneficial effect of the p.R311Q mutation. Finally, the functional dominance of the p.R311Q variant to the p.G56R mutation is discussed.

Original languageEnglish
Pages (from-to)342-351
Number of pages10
JournalHuman mutation
Volume30
Issue number3
DOIs
StatePublished - Mar 1 2009

Keywords

  • Cofactor assembly
  • Corepressor binding
  • NR2E3
  • PNR
  • Photoreceptor-specific nuclear receptor
  • Retinal degeneration
  • Transcriptional regulation

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    Escher, P., Gouras, P., Roduit, R., Tiab, L., Bolay, S., Delarive, T., Chen, S., Tsai, C. C., Hayashi, M., Zernant, J., Merriam, J. E., Mermod, N., Allikmets, R., Munier, F. L., & Schorderet, D. F. (2009). Mutations in NR2E3 can cause dominant or recessive retinal degenerations in the same family. Human mutation, 30(3), 342-351. https://doi.org/10.1002/humu.20858