undermodified hydroxywybutosine

Common name:
undermodified hydroxywybutosine
CA index name:
1H-Imidazo[1,2-a]purine-7-butanoic acid, a-amino-4,9-dihydro-b-hydroxy-4,6-dimethyl-9-oxo- 1-b-D-ribofuranosyl-
CA registry numbers:
ribonucleoside 84270-20-2
base 70363-41-6
elemental composition:
nucleoside mass:
Source type phylogenetic source
archaea bacteria eukarya
tRNA +

Structure: [1]

Synthesis: [2]

Comment: Nomenclature for the yW nucleosides is discussed in [3] and [4]. Structure characterization was from the acid-liberated base. A Chemical Abstracts registry number was then assigned to the corresponding ribonucleoside. Symbol for the corresponding base is Ye.


  1. Kuchino, Y., Kasai, H., Yamaizumi, Z., Nishimura, S. and Borek, E. (1979) Biochim. Biophys. Acta, 565, 215-218.
  2. Kasai, H., Yamaizumi, Z., Kuchino, Y. and Nishimura, S. (1979) Nucleic Acids Res., 6, 993-999.
  3. Blobstein, S.H., Grunberger, D., Weinstein, I.B. and Nakanishi, K. (1973) Biochemistry, 12, 188-193.
  4. Kasai, H., Goto, M., Ikeda, K., Zama, M., Mizuno, Y., Takemura, S., Matsuura, S., Sugimoto, T. and Goto, T. (1976) Biochemistry, 15, 898-904.