Biallelic Mutations in MRPS34 Lead to Instability of the Small Mitoribosomal Subunit and Leigh Syndrome

The synthesis of all 13 mitochondrial DNA (mtDNA)-encoded protein subunits of the human oxidative phosphorylation (OXPHOS) system is carried out by mitochondrial ribosomes (mitoribosomes). Defects in the stability of mitoribosomal proteins or mitoribosome assembly impair mitochondrial protein translation, causing combined OXPHOS enzyme deficiency and clinical disease. Here we report four autosomal-recessive pathogenic mutations in the gene encoding the small mitoribosomal subunit protein, MRPS34, in six subjects from four unrelated families with Leigh syndrome and combined OXPHOS defects.

Source: The American Journal of Human Genetics - August 3, 2017 Category: Genetics & Stem Cells Authors: Nicole J. Lake, Bryn D. Webb, David A. Stroud, Tara R. Richman, Benedetta Ruzzenente, Alison G. Compton, Hayley S. Mountford, Juliette Pulman, Coralie Zangarelli, Marlene Rio, Nathalie Bodaert, Zahra Assouline, Mingma D. Sherpa, Eric E. Schadt, Sander M. Tags: Article Source Type: research