Identification of the Photoreceptor Transcriptional Co-Repressor SAMD11 as Novel Cause of Autosomal Recessive Retinitis Pigmentosa.

TitleIdentification of the Photoreceptor Transcriptional Co-Repressor SAMD11 as Novel Cause of Autosomal Recessive Retinitis Pigmentosa.
Publication TypeJournal Article
Year of Publication2016
AuthorsCorton M, Avila-Fernández A, Campello L, Sánchez M, Benavides B, López-Molina MI, Fernández-Sánchez L, Sánchez-Alcudia R, da Silva LRJ, Reyes N, Martín-Garrido E, Zurita O, Fernández-San José P, Pérez-Carro R, García-García F, Dopazo J, García-Sandoval B, Cuenca N, Ayuso C
Journal TitleScientific reports
Volume6
Pages35370
Journal Date2016 Oct 13
ISSN2045-2322
AbstractRetinitis pigmentosa (RP), the most frequent form of inherited retinal dystrophy is characterized by progressive photoreceptor degeneration. Many genes have been implicated in RP development, but several others remain to be identified. Using a combination of homozygosity mapping, whole-exome and targeted next-generation sequencing, we found a novel homozygous nonsense mutation in SAMD11 in five individuals diagnosed with adult-onset RP from two unrelated consanguineous Spanish families. SAMD11 is ortholog to the mouse major retinal SAM domain (mr-s) protein that is implicated in CRX-mediated transcriptional regulation in the retina. Accordingly, protein-protein network analysis revealed a significant interaction of SAMD11 with CRX. Immunoblotting analysis confirmed strong expression of SAMD11 in human retina. Immunolocalization studies revealed SAMD11 was detected in the three nuclear layers of the human retina and interestingly differential expression between cone and rod photoreceptors was observed. Our study strongly implicates SAMD11 as novel cause of RP playing an important role in the pathogenesis of human degeneration of photoreceptors.
URLhttp://www.nature.com/articles/srep35370
DOI10.1038/srep35370
Alternate JournalSci Rep