Exome sequencing reveals three homozygous missense variants in SNRPA in two sisters with syndromic intellectual disability.

We describe the previously unreported concurrence of intellectual disability, short stature, poor speech, and minor craniofacial and hand anomalies in two female siblings with three homozygous missense variants in SNRPA (a component of the U1 small nuclear ribonucleoprotein complex) characterized by homozygosity mapping and whole exome sequencing. Combined, c.97A>G, c.98T>C, and c.100T>A, in exon 2 of SNRPA lead to p.Ile33Ala and p.Phe34Ile exchanges, which were predicted in silico to be deleterious. Although both patients exhibited some clinical features seen in other spliceosomal disorders, their complete clinical phenotype appears to be rather uncommon, a finding that may further support the notion that mutations in components of the major spliceosome do not strictly lead to the same syndromes/phenotypes.
PMID: 29437235 [PubMed - as supplied by publisher]

Source: Clinical Genetics - February 13, 2018 Category: Genetics & Stem Cells Authors: Rangel-Sosa MM, Figuera-Villanueva LE, González-Ramos IA, Pérez-Páramo YX, Martínez-Jacobo LA, Arnaud-López L, Nastasi-Catanese JA, Rivas-Estilla AM, Galán-Huerta KA, Rojas-Martínez A, Ortiz-López R, Córdova-Fletes C Tags: Clin Genet Source Type: research