Encyclopedia of Astrobiology

Living Edition
| Editors: Muriel Gargaud, William M. Irvine, Ricardo Amils, Henderson James Cleaves, Daniele Pinti, José Cernicharo Quintanilla, Michel Viso

Uracil (Ura)

  • Shin Miyakawa
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27833-4_1631-3

Definition

C4H4N2O2. M.W. 112.09. Uracil is one of the four nucleic acid bases found in RNA. In double-stranded RNA, it pairs with adenine, via two hydrogen bonds in Watson-Crick base pairing. Uracil can be formed by deamination of cytosine. The half-life of uracil in water is 12 years at 100 °C and 3.8 × 108 years at 0 °C at pH 7. It has a UV absorption maximum at 260 nm in neutral solution. It has been found in the Murchison meteorite and has been synthesized in HCN polymerizations and Fischer-Tropsch-type reactions and by the action of electric discharges and irradiations of high-energy protons on simple gas mixtures such as CO–N2–H2O.

See Also

Keywords

Nucleic Acid Base Pairing Bioorganic Chemistry Electric Discharge Acid Basis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Ribomic IncTokyoJapan