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    Mitochondrion. 2009 Sep;9(5):299-305. Epub 2009 Apr 21.

    Pathogenic mutations in the 5' untranslated region of BCS1L mRNA in mitochondrial complex III deficiency.

    Source

    Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), U723, Spain.

    Abstract

    Mutations in the assembly chaperone BCS1L constitute a major cause of mitochondrial complex III deficiency. We studied the presence of BCS1L mutations in a complex III-deficient patient with metabolic acidosis, liver failure, and tubulopathy. A previously reported mutation, p.R56X, was identified in one BCS1L allele, and two novel heterozygous mutations, g.1181A>G and g.1164C>G, were detected in the second allele. The g.1181A>G mutation generated an alternative splicing site in the BCS1L transcript, causing a 19-nucleotides deletion in its 5'UTR region. Decreased BCS1L mRNA and protein levels, and a respiratory chain complex III assembly impairment, determine a pathogenic role for the novel BCS1L mutations.

    PMID:
    19389488
    [PubMed - indexed for MEDLINE]

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