Defective mitochondrial RNA processing due to PNPT1 variants causes Leigh syndrome
نویسندگان
چکیده
منابع مشابه
Mutant NDUFS3 subunit of mitochondrial complex I causes Leigh syndrome.
Respiratory chain complex I deficiency represents a genetically heterogeneous group of diseases resulting from mutations in mitochondrial or nuclear genes. Mutations have been reported in 13 of the 14 subunits encoding the core of complex I (seven mitochondrial and six nuclear genes) and these result in Leigh or Leigh-like syndromes or cardiomyopathy. In this study, a combination of denaturing ...
متن کاملA mutation in PNPT1, encoding mitochondrial-RNA-import protein PNPase, causes hereditary hearing loss.
A subset of nuclear-encoded RNAs has to be imported into mitochondria for the proper replication and transcription of the mitochondrial genome and, hence, for proper mitochondrial function. Polynucleotide phosphorylase (PNPase or PNPT1) is one of the very few components known to be involved in this poorly characterized process in mammals. At the organismal level, however, the effect of PNPase d...
متن کاملDefective complex I assembly due to C20orf7 mutations as a new cause of Leigh syndrome
BACKGROUND Leigh syndrome is an early onset, progressive, neurodegenerative disorder with developmental and motor skills regression. Characteristic magnetic resonance imaging abnormalities consist of focal bilateral lesions in the basal ganglia and/or the brainstem. The main cause is a deficiency in oxidative phosphorylation due to mutations in an mtDNA or nuclear oxidative phosphorylation gene...
متن کاملA mutation in MT-TW causes a tRNA processing defect and reduced mitochondrial function in a family with Leigh syndrome.
Leigh syndrome (LS) is a progressive mitochondrial neurodegenerative disorder, whose symptoms most commonly include psychomotor delay with regression, lactic acidosis and a failure to thrive. Here we describe three siblings with LS, but with additional manifestations including hypertrophic cardiomyopathy, hepatosplenomegaly, cholestatic hepatitis, and seizures. All three affected siblings were ...
متن کاملLeigh syndrome: One disorder, more than 75 monogenic causes.
Leigh syndrome is the most common pediatric presentation of mitochondrial disease. This neurodegenerative disorder is genetically heterogeneous, and to date pathogenic mutations in >75 genes have been identified, encoded by 2 genomes (mitochondrial and nuclear). More than one-third of these disease genes have been characterized in the past 5 years alone, reflecting the significant advances made...
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ژورنال
عنوان ژورنال: Human Molecular Genetics
سال: 2017
ISSN: 0964-6906,1460-2083
DOI: 10.1093/hmg/ddx221