ArticleMethods in molecular biology (Clifton, N.J.)2023
Sucrose Gradient Analysis of Human Mitochondrial Ribosomes and RNA.
Article in Methods in molecular biology (Clifton, N.J.), 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Faithful expression of the mitochondrial genome is required for the synthesis of the oxidative phosphorylation complexes and cell fitness. In humans, mitochondrial DNA (mtDNA) encodes 13 essential subunits of four oxidative phosphorylation complexes along with tRNAs and rRNAs needed for the translation of these proteins. Protein synthesis occurs on unique ribosomes within the organelle. Over the last decade, the revolution in genetic diagnostics has identified disruptions to the faithful synthesis of these 13 mitochondrial proteins as the largest group of inherited human mitochondrial pathologies. All of the molecular steps required for mitochondrial protein synthesis can be affected, from the genome to protein, including cotranslational quality control. Here, we describe methodologies for the biochemical separation of mitochondrial ribosomes from cultured human cells for RNA and protein analysis. Our method has been optimized to facilitate analysis for low-level sample material and thus does not require prior organelle enrichment.
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