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Var1 protein domain : ウィキペディア英語版 | Var1 protein domain
In molecular biology, VAR1 protein domain, otherwise known as variant protein 1, is a ribosomal protein that forms part of the small ribosomal subunit in yeast mitochondria. Mitochondria possess their own ribosomes responsible for the synthesis of a small number of proteins encoded by the mitochondrial genome. VAR1 is the only protein in the yeast mitochondrial ribosome to be encoded in the mitochondria - the remaining approximately 80 ribosomal proteins are encoded in the nucleus. VAR1 along with 15S rRNA are necessary for the formation of mature 37S subunits. ==Function== It is thought that Var1 plays a role in the early steps of small subunit assembly and is required for the incorporation of at least one ribosomal protein. It is important for mitochondrial translational initiation, since it requires the interaction between the small ribosomal subunit and the message-specific translation factors. 〔
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