Abstract
When the yeasts Saccharomyces cerevisiae, Candida albicans and Schizosaccharomyces pombe and the thermophilic bacteria Bacillus stearothermophilus and Bacillus acidocaldarius were cultured in the presence of homospermidine, a new compound accumulated in the cells within a few days. This compound was identified as aminopropylhomospermidine [NH2(CH2)3NH (CH2)4NH(CH2)4NH2] by gas chromatographymass spectrometry (GC-MS) and by the enzymatic cleavage method developed in our laboratories. This polyamine was not produced from homospermidine in Escherichia coli, Bacillus subtilis, Bacillus alkalophilus, or a eukaryotic protozoon, Tetrahymena pyriformis, none of which usually contains appreciable amounts of spermine. These findings suggest that the synthesis of aminopropylhomospermidine from homospermidine is mediated by spermine synthase.
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