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Saccharomyces cerevisiae mitochondrial small ribosomal subunit protein mS26 and similar proteins mS26, also known as mitochondrial 37S ribosomal protein PET12, is a component of the mitochondrial small ribosomal subunit (mt-SSU) of Saccharomyces cerevisiae mitochondrial ribosome (mitoribosome), a dedicated translation machinery responsible for the synthesis of mitochondrial genome-encoded proteins, including at least some of the essential transmembrane subunits of the mitochondrial respiratory chain. The mitoribosomes are attached to the mitochondrial inner membrane and translation products are cotranslationally integrated into the membrane. The family also includes a group of uncharacterized proteins from pezizomycotina, which show high sequence similarity with mS26.
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