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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Cytosinine: pyridoxal phosphate tautomerase, a new enzyme in the blasticidin S biosynthetic pathway.

Cytosinine--the nucleoside portion of blasticidin S--and pyridoxal phosphate were incubated with cell-free extracts of Streptomyces griseochromogenes prepared in D2O. 2H NMR analysis of recovered cytosinine showed it to contain deuterium enrichments at H-4' and H-2'. No exchange was observed with either boiled extract or from cytosinine and pyridoxal phosphate alone. These results reveal the presence of a tautomerase activity that contributes to the net transamination at C-4' in the conversion of cytosylglucuronic acid to blasticidin S, and its discovery supports the role of cytosinine as a biosynthetic intermediate.[1]

References

  1. Cytosinine: pyridoxal phosphate tautomerase, a new enzyme in the blasticidin S biosynthetic pathway. Gould, S.J., Zhang, Q. J. Antibiot. (1995) [Pubmed]
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