Cloning and characterization of MRP10, a yeast gene coding for a mitochondrial ribosomal protein.
The nuclear gene MRP10 of Saccharomyces cerevisiae was cloned by complementation of a respiratory deficient mutant N518/L1. This mutant is defective in mitochondrial translation and shows a tendency to accumulate deletions in mitochondrial DNA (rho-). Analysis revealed Mrp10p to be a component of the 37 S subunit of the mitochondrial ribosomes. Disruption of MRP10 in a haploid strain of yeast elicits a phenotype identical to that of the original mutant. The respiratory defect of the null mutant is rescued by re-introducing the MRP10 gene in a wild-type mitochondrial DNA background. These results indicate that Mrp10p belongs to the class of yeast mitochondrial ribosomal proteins that are essential for translation. Searches of current databases failed to reveal any homologs among known bacterial or eucaryotic cytoplasmic ribosomal proteins. Some sequence similarity, however, was detected between Mrp10p and Yml37p, previously identified as a component of the yeast mitochondrial 50 S ribosomal subunit.
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Department of Biological Sciences, Columbia University, New York, NY 10027, USA.
Myers
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Tzagoloff
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D000595:Amino Acid Sequence; D001483:Base Sequence; D005656:Fungal Proteins / Q000235:genetics*; D018390:Gene Targeting; D005800:Genes, Fungal; D005816:Genetic Complementation Test; D008928:Mitochondria / Q000378:metabolism; D024101:Mitochondrial Proteins; D008969:Molecular Sequence Data; D014176:Protein Biosynthesis; D012269:Ribosomal Proteins / Q000737:chemistry / Q000235:genetics*; D012441:Saccharomyces cerevisiae / Q000235:genetics*; D029701:Saccharomyces cerevisiae Proteins
D005656:Fungal Proteins; C105693:MRP10 protein, S cerevisiae; C105694:MRPL37 protein, S cerevisiae; D024101:Mitochondrial Proteins; D012269:Ribosomal Proteins; D029701:Saccharomyces cerevisiae Proteins