tokens: The predicted amino acid sequence contained all consensus regions for S - adenosyl methionine methyltransferases and presented 26 % identity with Saccharomyces cerevisiae DHHB - methyltransferase and 38 % identity with the rat protein , as well as with a bacterial ( Escherichia coli and Salmonella typhimurium ) methyltransferase encoded by the UBIG gene .