Yeast mitochondrial code

The yeast mitochondrial code is a genetic code used by the mitochondrial genome of yeasts, notably Saccharomyces cerevisiae, Candida glabrata, Hansenula saturnus, and Kluyveromyces thermotolerans.

The code

Bases: adenine, cytosine, guanine and thymine or uracil.
Amino acids: Alanine, Arginine, Asparagine, Aspartic acid, Cysteine, Glutamic acid, Glutamine, Glycine, Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Proline, Serine, Threonine, Tryptophan, Tyrosine, Valine.

Differences from the standard code

The remaining CGN codons are rare in Saccharomyces cerevisiae and absent in Candida glabrata.
The AUA codon is common in the gene var1 coding for the single mitochondrial ribosomal protein, but rare in genes encoding the enzymes.
The coding assignments of the AUA and CUU are uncertain in Hansenula saturnus.
The coding assignment of Thr to CUN is uncertain in Kluyveromyces thermotolerans.