Tags: Protein.
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.