The primary structure of yeast mitochondrial tyrosine tRNA

The mitochondrial tyrosine tRNA from Saccharomyces cerevisiae has been sequenced. It has two interesting structural features: (i) it lacks two semi-invariant purine residues in the D-loop which are involved in tertiary interactions in the yeast cytoplasmic tRNAPhe; (ii) it has a large variable loop and therefore resembles procaryotic tRNAsTyr rather than eucaryotic cytoplasmic ones.